Sample records for gas propane ultra-low

  1. QER- Comment of National Propane Gas Association

    Broader source: Energy.gov [DOE]

    Ladies and Gentlemen: Please find attached the QER comments of the National Propane Gas Association. Please feel to contact us if we can provide further information. Thank you for your attention to our submission.

  2. Gravity Control by means of Electromagnetic Field through Gas or Plasma at Ultra-Low Pressure

    E-Print Network [OSTI]

    Fran De Aquino

    2013-12-02T23:59:59.000Z

    It is shown that the gravity acceleration just above a chamber filled with gas or plasma at ultra-low pressure can be strongly reduced by applying an Extra Low-Frequency (ELF) electromagnetic field across the gas or the plasma. This Gravitational Shielding Effect is related to recent discovery of quantum correlation between gravitational mass and inertial mass. According to the theory samples hung above the gas or the plasma should exhibit a weight decrease when the frequency of the electromagnetic field is decreased or when the intensity of the electromagnetic field is increased. This Gravitational Shielding Effect is unprecedented in the literature and can not be understood in the framework of the General Relativity. From the technical point of view, there are several applications for this discovery; possibly it will change the paradigms of energy generation, transportation and telecommunications.

  3. DEVELOPMENT AND DEMONSTRATION OF AN ULTRA LOW NOx COMBUSTOR FOR GAS TURBINES

    SciTech Connect (OSTI)

    NEIL K. MCDOUGALD

    2005-04-30T23:59:59.000Z

    Alzeta Corporation has developed surface-stabilized fuel injectors for use with lean premixed combustors which provide extended turndown and ultra-low NOX emission performance. These injectors use a patented technique to form interacting radiant and blue-flame zones immediately above a selectively-perforated porous metal surface. This allows stable operation at low reaction temperatures. This technology is being commercialized under the product name nanoSTAR. Initial tests demonstrated low NOX emissions but, were limited by flashback failure of the injectors. The weld seams required to form cylindrical injectors from flat sheet material were identified as the cause of the failures. The approach for this project was to first develop new fabrication methods to produce injectors without weld seams, verify similar emissions performance to the original flat sheet material and then develop products for microturbines and small gas turbines along parallel development paths. A 37 month project was completed to develop and test a surface stabilized combustion system for gas turbine applications. New fabrication techniques developed removed a technological barrier to the success of the product by elimination of conductive weld seams from the injector surface. The injectors demonstrated ultra low emissions in rig tests conducted under gas turbine operating conditions. The ability for injectors to share a common combustion chamber allowing for deployment in annular combustion liner was also demonstrated. Some further development is required to resolve integration issues related to specific engine constraints, but the nanoSTAR technology has clearly demonstrated its low emissions potential. The overall project conclusions can be summarized: (1) A wet-laid casting method successfully eliminated weld seams from the injector surface without degrading performance. (2) Gas turbine cycle analysis identified several injector designs and control schemes to start and load engines using nanoSTAR technology. A mechanically simple single zone injector can be used in Solar Turbine's Taurus 60 engine. (3) Rig testing of single monolithic injectors demonstrated sub 3 ppmv NOX and sub 10 ppmv CO and UHC emissions (all corrected to 15% O2) at Taurus 60 full-load pressure and combustion air inlet temperature. (4) Testing of two nanoSTAR injectors in Solar Turbine's sector rig demonstrated the ability for injectors to survive when fired in close proximity at Taurus 60 full load pressure and combustion air inlet temperature. (5) Sector rig tests demonstrated emissions performance and range of operability consistent with single injector rig tests. Alzeta has committed to the commercialization of nanoSTAR injectors and has sufficient production capability to conclude development and meet initial demand.

  4. National propane safety week caps fifth anniversary of GAS Check

    SciTech Connect (OSTI)

    Prowler, S.

    1990-09-01T23:59:59.000Z

    This paper reports on National Propane Safety Week. The publicity encompassed everything from preventative maintenance to safe winter storage of cylinders. This campaign focused much of its attention on GAS (gas appliance system) Check, the propane industry's most well-known safety program.

  5. Digital Pulse-Shape Discrimination Applied to an Ultra-Low-Background Gas-Proportional Counting System: First Results

    SciTech Connect (OSTI)

    Aalseth, Craig E.; Day, Anthony R.; Fuller, Erin S.; Hoppe, Eric W.; Keillor, Martin E.; Mace, Emily K.; Myers, A. W.; Overman, Cory T.; Panisko, Mark E.; Seifert, Allen; Warren, Glen A.; Williams, Richard M.

    2013-05-01T23:59:59.000Z

    Abstract A new ultra-low-background proportional counter (ULBPC) design was recently developed at Pacific Northwest National Laboratory (PNNL). This design, along with an ultra-low-background counting system (ULBCS) which provides passive and active shielding with radon exclusion, has been developed to complement a new shallow underground laboratory (~30 meters water-equivalent) constructed at PNNL. After these steps to mitigate dominant backgrounds (cosmic rays, external gamma-rays, radioactivity in materials), remaining background events do not exclusively arise from ionization of the proportional counter gas. Digital pulse-shape discrimination (PSD) is thus employed to further improve measurement sensitivity. In this work, a template shape is generated for each individual sample measurement of interest, a "self-calibrating" template. Differences in event topology can also cause differences in pulse shape. In this work, the temporal region analyzed for each event is refined to maximize background discrimination while avoiding unwanted sensitivity to event topology. This digital PSD method is applied to sample and background data, and initial measurement results from a biofuel methane sample are presented in the context of low-background measurements currently being developed.

  6. Experimental studies of steam-propane and enriched gas injection for the Minas light crude oil 

    E-Print Network [OSTI]

    Yudishtira, Wan Dedi

    2003-01-01T23:59:59.000Z

    Experimental studies were carried out to compare the benefits of propane as an additive in steam injection and in lean gas injection to enhance production for the Minas light crude oil (34?API). The studies on steam-propane were specifically...

  7. Experimental studies of steam-propane and enriched gas injection for the Minas light crude oil

    E-Print Network [OSTI]

    Yudishtira, Wan Dedi

    2003-01-01T23:59:59.000Z

    Experimental studies were carried out to compare the benefits of propane as an additive in steam injection and in lean gas injection to enhance production for the Minas light crude oil (34?API). The studies on steam-propane were specifically...

  8. Investigation of the flame speeds of propane/methanol gas mixtures

    SciTech Connect (OSTI)

    Foote, K.L.; Villareal, J.

    1985-05-02T23:59:59.000Z

    A series of tests was conducted in an acoustically tuned flame tube in order to determine the laminar burning velocities in air of various propane/methanol gas mixtures. The experimental method is explained in detail, along with the tabular results. A 90% propane, 10% methanol mixture is shown to have a maximum burning velocity of 40.8 cm/s. A 65% propane, 35% methanol mixture has a maximum velocity of 41.8 cm/s. These maximum flame speeds are shown to be about the same as that of pure propane by the same method. Gulder has found evidence that the presence of methanol in some hydrocarbon fuels may actually inhibit combustion, but we see no apparent modifications in the combustion of propane when mixed with methanol.

  9. Effects of Propane/Natural Gas Blended Fuels on Gas Turbine Pollutant Emissions

    SciTech Connect (OSTI)

    Straub, D.L.; Ferguson, D.H.; Casleton, K.H.; Richards, G.A.

    2007-03-01T23:59:59.000Z

    Liquefied natural gas (LNG) imports to the U.S. are expected to grow significantly over the next 10-15 years. Likewise, it is expected that changes to the domestic gas supply may also introduce changes in natural gas composition. As a result of these anticipated changes, the composition of fuel sources may vary significantly from conventional domestic natural gas supplies. This paper will examine the effects of fuel variability on pollutant emissions for premixed gas turbine conditions. The experimental data presented in this paper have been collected from a pressurized single injector combustion test rig at the National Energy Technology Laboratory (NETL). The tests are conducted at 7.5 atm with a 588 K air preheat. A propane blending facility is used to vary the Wobbe Index of the site natural gas. The results indicate that propane addition of about five (vol.) percent does not lead to a significant change in the observed NOx or CO emissions. These results are different from data collected on some engine applications and potential reasons for these differences will be described.

  10. Development of an ultra-safe, ultra-low-emissions natural gas-fueled school bus: Phase 2, prototype hardware development

    SciTech Connect (OSTI)

    Kubesh, J. [Southwest Research Inst., San Antonio, TX (United States)

    1996-04-01T23:59:59.000Z

    This report summarizes work done on Phase 2, ``Prototype Hardware Development`` of Southwest Research Institute (SwRI) Project No. 03-6871, ``Development of an Ultra-Safe, Ultra-Low-Emissions Alternative-Fueled School Bus``. A prototype school bus was designed and constructed. This bus incorporated many new technologies to increase the safety of the bus passengers as well as pedestrians boarding and leaving the bus. These technologies emphasized increased visibility between the bus driver and pedestrians or vehicles, and included the use of high intensity discharge lighting, pedestrian and vehicle detection systems, and remote-mounted cameras. Passenger safety was also stressed, with the application of seat belts and improved emergency exits and lighting. A natural gas-fueled engine was developed for powering the bus. The development process focused primarily on improvements to the lean operation of the engine and control system advancements. The control system development included investigations into alternative control algorithms for steady-state and transient operation, various fuel metering devices, as well as new methods for wastegate control, knock and misfire detection, and catalyst monitoring. Both the vehicle and engine systems represent state-of-the-art technologies. Integration of the vehicle and engine is planned for the next phase of the project, followed by a demonstration test of the overall vehicle system.

  11. Multilayer Platform for Ultra-Low-Loss Waveguide Applications

    E-Print Network [OSTI]

    2012-01-01T23:59:59.000Z

    1, 2012 Multilayer Platform for Ultra-Low-Loss Waveguidepreviously demonstrated ultra-low-loss technologies. Groupet al. : MULTILAYER PLATFORM FOR ULTRA-LOW-LOSS WAVEGUIDE

  12. Ultra Low Power Bioelectronics Fundamentals, Biomedical Applications,

    E-Print Network [OSTI]

    Sarpeshkar, Rahul

    Ultra Low Power Bioelectronics Fundamentals, Biomedical Applications, and Bio-inspired Systems to articulate information-based principles for ultra-low-power design that apply to biology or to electronics of ultra- low-power electronics and bioelectronics is shown in the figure below. Engineering can aid

  13. U.S. Natural Gas Supplemental Gas - Propane Air (Million Cubic Feet)

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40 Buildingto17 34 44Year Jan Feb MarDecade Year-0 Year-1 Year-2 Year-3OtherPropane

  14. Published in Journal de Physique IV, vol 11, pp. Pr3-101 ---Pr3-108 Kinetic modelling of gas-phase decomposition of propane : correlation with pyrocarbon deposition

    E-Print Network [OSTI]

    Boyer, Edmond

    -phase decomposition of propane : correlation with pyrocarbon deposition Cédric Descamps, Gerard L. Vignoles , Olivier : A chemical kinetic model for gas-phase pyrolysis of propane has been set up, partially reduced, and validated the notion of "maturation" from propane to lighter hydrocarbons, then to aromatic compounds and PAHs. The gas

  15. ULTRA-LOW-ENERGY HIGH-CURRENT ION SOURCE

    E-Print Network [OSTI]

    Anders, Andre

    2010-01-01T23:59:59.000Z

    a high current ion source for ultra-low energy ions has beenthe Department of Energy ULTRA-LOW-ENERGY HIGH-CURRENT IONedited by A. Anders. ULTRA-LOW-ENERGY HIGH-CURRENT ION

  16. Nanosegregated Cathode Catalysts with Ultra-Low Platinum Loading...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Nanosegregated Cathode Catalysts with Ultra-Low Platinum Loading Nanosegregated Cathode Catalysts with Ultra-Low Platinum Loading Presented at the Department of Energy Fuel Cell...

  17. Novel Ultra-Low-Energy Consumption Ultrasonic Clothes Dryer ...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Ultra-Low-Energy Consumption Ultrasonic Clothes Dryer Novel Ultra-Low-Energy Consumption Ultrasonic Clothes Dryer Preliminary measured drying time of fabric sample using ultrasonic...

  18. Adaptive Injection Strategies (AIS) for Ultra-low Emissions Diesel...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Injection Strategies (AIS) for Ultra-low Emissions Diesel Engines Adaptive Injection Strategies (AIS) for Ultra-low Emissions Diesel Engines Presentation given at the 2007 Diesel...

  19. Dynamics of Propane in Silica Mesopores Formed upon Propylene Hydrogenation over Pt Nanoparticles by Time-Resolved FT-IR Spectroscopy

    E-Print Network [OSTI]

    Waslylenko, Walter; Frei, Heinz

    2008-01-01T23:59:59.000Z

    A steady state distribution of propane between gas andK). A steady state distribution of propane between gas phasesteady state distribution between propane inside and outside

  20. High Efficiency, Ultra-Low Emission, Integrated Process Heater System

    SciTech Connect (OSTI)

    Mason, Howard; Boral, Anindya; Chhotray, San; Martin, Matthew

    2006-06-19T23:59:59.000Z

    The team of TIAX LLC, ExxonMobil Research and Engineering Company, and Callidus Technologies, LLC conducted a six-year program to develop an ultra-low emission process heater burner and an advanced high efficiency heater design. This project addresses the critical need of process heater operators for reliable, economical emission reduction technologies to comply with stringent emission regulations, and for heater design alternatives that reduce process heater energy requirements without significant cost increase. The key project targets were NOx emissions of 10 ppm (@ 3% O2), and a heater thermal efficiency of 95 percent. The ultra low NOx burner was developed through a series of pilot-scale and field tests combined with computational fluid dynamic modeling to arrive at simultaneous low emissions and suitable flame shape and stability. Pilot scale tests were run at TIAX, at the 2 MMBtu/hr scale, and at Callidus at 8 MMBtu/hr. The full scale burner was installed on a 14 burner atmospheric pipestill furnace at an ExxonMobil refinery. A variety of burner configurations, gas tips and flame stabilizers were tested to determine the lowest emissions with acceptable flame shape and stability. The resulting NOx emissions were 22 ppm on average. Starting in 2001, Callidus commercialized the original ultra low NOx burner and made subsequent design improvements in a series of commercial burners evolving from the original concept and/or development. Emissions in the field with the ultra low-NOx burner over a broad spectrum of heater applications have varied from 5 ppm to 30 ppm depending on heater geometry, heater service, fuel and firing capacity. To date, 1550 of the original burners, and 2500 of subsequent generation burners have been sold by Callidus. The advanced heater design was developed by parametric evaluations of a variety of furnace and combustion air preheater configurations and technologies for enhancing convective and radiative heat transfer. The design evolution relied heavily on computational fluid dynamic predictions of design alternatives. The final design features modular separate radiant cells, each with one and two-side fired vertical tubes. The convection section configuration is vertical tube banks enclosed in the radiant channels. Commercial modular plate air preheaters are used. The predicted performance for the integrated advanced heater and Callidus burner is 95 percent efficiency with 9 ppm NOx emissions firing natural gas, and 12 ppm firing refinery gas. The total erected cost is less than a conventional heater with combustion air preheat.

  1. Ultra-low field magnetic resonance using optically pumped noble gases and SQUID detection

    E-Print Network [OSTI]

    Wong-Foy, Annjoe G.

    2010-01-01T23:59:59.000Z

    Enhancement . . . . Ultra Low Field Xenon NMR ShowingIntroduction.. 4.2 Ultra Low FieldNuclear Polarization 5.10.3 Ultra Low Field Chemical Shift

  2. Ultra-Low Power Time Synchronization Using Passive Radio Receivers

    E-Print Network [OSTI]

    Amir, Yair

    Ultra-Low Power Time Synchronization Using Passive Radio Receivers Yin Chen Qiang Wang Marcus Chang. In this pa- per, we present an inexpensive and ultra-low power ( of elapsed seconds. The universal time sig- nal receiver combines an off-the-shelf radio chip with an ultra-low

  3. American Institute of Aeronautics and Astronautics Ultra Low Emissions Combustor

    E-Print Network [OSTI]

    Seitzman, Jerry M.

    1 American Institute of Aeronautics and Astronautics T Ultra Low Emissions Combustor with Non-premixed modes of combustion with ultra low NOx emissions. The combustor consists of a tube with open and closed low temperatures with ultra low NOx emission in the 1 ppm range and below. It is also shown

  4. Silicon on ultra-low-loss waveguide photonic integration platform

    E-Print Network [OSTI]

    Bauters, Jared; Davenport, Michael; Heck, Martijn; Doylend, Jonathan; Chen, Arnold; Fang, Alexander

    2013-01-01T23:59:59.000Z

    and J. E. Bowers, “Ultra-low-loss high-aspect-ratio Si 3 N 4and K. J. Vahala, “Ultra-low-loss optical delay line on aspiral is 78 mm long. 3. Ultra-low-loss waveguides with and

  5. Universal Hash Functions for Emerging Ultra-Low-Power Networks

    E-Print Network [OSTI]

    Universal Hash Functions for Emerging Ultra-Low-Power Networks Kaan Y¨uksel, Jens-Peter Kaps provable security in ultra-low-power applications such as the next generation self-powered sensor networks in ultra-low-power applications such as "Smart Dust" motes and RFIDs. By virtue of their security

  6. Ultra Low Power Electronics for Medicine Rahul Sarpeshkar

    E-Print Network [OSTI]

    Sarpeshkar, Rahul

    Ultra Low Power Electronics for Medicine Rahul Sarpeshkar Analog VLSI and Biological Systems Group on an implanted 100mAh rechargeable battery. Another example includes an ultra low power portable pulse oximeter monitoring. Medical applications in the future are likely to benefit greatly from ultra low power electronics

  7. AERODYNAMICS AND DESIGN FOR ULTRA-LOW REYNOLDS NUMBER FLIGHT

    E-Print Network [OSTI]

    Stanford University

    AERODYNAMICS AND DESIGN FOR ULTRA-LOW REYNOLDS NUMBER FLIGHT A DISSERTATION SUBMITTED at Reynolds numbers below 10,000, here termed ultra-low Reynolds numbers. The effects of airfoil geometry at ultra-low Reynolds numbers. To further explore this design space, the flow solver has been coupled

  8. Fuels outlook for oil/propane

    SciTech Connect (OSTI)

    Weigand, P.

    1995-09-01T23:59:59.000Z

    The outlook for using oil and propane as fuels is outlined. The following topics are discussed: factors affecting price of the burner tip, supply and demand forecast, distribution costs and availability, alternate fuels economics, propane prices, No. 2 oil prices, natural gas vs. 1% residual HP prices, and future for industrial oil and propane consumers.

  9. TIME-VARYING FLAME IONIZATION SENSING APPLIED TO NATURAL GAS AND PROPANE BLENDS IN A PRESSURIZED LEAN PREMIXED (LPM) COMBUSTOR

    SciTech Connect (OSTI)

    D. L. Straub; B. T. Chorpening; E. D. Huckaby; J. D. Thornton; W. L. Fincham

    2008-06-13T23:59:59.000Z

    In-situ monitoring of combustion phenomena is a critical need for optimal operation and control of advanced gas turbine combustion systems. The concept described in this paper is based on naturally occurring flame ionization processes that accompany the combustion of hydrocarbon fuels. Previous work has shown that flame ionization techniques may be applied to detect flashback, lean blowout, and some aspects of thermo-acoustic combustion instabilities. Previous work has focused on application of DC electric fields. By application of time-varying electric fields, significant improvements to sensor capabilities have been observed. These data have been collected in a lean premixed combustion test rig operating at 0.51-0.76 MPa (5-7.5 atm) with air preheated to 588 K (600°F). Five percent of the total fuel flow is injected through the centerbody tip as a diffusion pilot. The fuel composition is varied independently by blending approximately 5% (volume) propane with the pipeline natural gas. The reference velocity through the premixing annulus is kept constant for all conditions at a nominal value of 70 m/s. The fuel-air equivalence ratio is varied independently from 0.46 – 0.58. Relative to the DC field version, the time-varying combustion control and diagnostic sensor (TV-CCADS) shows a significant improvement in the correlation between the measured flame ionization current and local fuel-air equivalence ratio. In testing with different fuel compositions, the triangle wave data show the most distinct change in flame ionization current in response to an increase in propane content. Continued development of this sensor technology will improve the capability to control advanced gas turbine combustion systems, and help address issues associated with variations in fuel supplies.

  10. LIQUID PROPANE GAS (LPG) STORAGE AREA BOILING LIQUID EXPANDING VAPOR EXPLOSION (BLEVE) ANALYSIS

    SciTech Connect (OSTI)

    PACE, M.E.

    2004-01-13T23:59:59.000Z

    The PHA and the FHAs for the SWOC MDSA (HNF-14741) identified multiple accident scenarios in which vehicles powered by flammable gases (e.g., propane), or combustible or flammable liquids (e.g., gasoline, LPG) are involved in accidents that result in an unconfined vapor cloud explosion (UVCE) or in a boiling liquid expanding vapor explosion (BLEVE), respectively. These accident scenarios are binned in the Bridge document as FIR-9 scenarios. They are postulated to occur in any of the MDSA facilities. The LPG storage area will be in the southeast corner of CWC that is relatively remote from store distaged MAR. The location is approximately 30 feet south of MO-289 and 250 feet east of 2401-W by CWC Gate 10 in a large staging area for unused pallets and equipment.

  11. Digital Bimodal Function: An Ultra-Low Energy Security Primitive

    E-Print Network [OSTI]

    Potkonjak, Miodrag

    Digital Bimodal Function: An Ultra-Low Energy Security Primitive Teng Xu, James B. Wendt function (DBF) that enables ultra low energy security protocols. DBF allows the computation of legitimate and energy expense. Our new approach is competitive with the energy efficiency of traditional security key

  12. Matched Public PUF: Ultra Low Energy Security Platform

    E-Print Network [OSTI]

    Potkonjak, Miodrag

    Matched Public PUF: Ultra Low Energy Security Platform Saro Meguerdichian and Miodrag Potkonjak that cannot be matched with any third such module. Each device enables rapid, low-energy computation of ultra Our strategic objective is to introduce concepts and a hard- ware platform that enable ultra low power

  13. One-dimensional ordering of ultra-low density ion beams in a storage ring

    E-Print Network [OSTI]

    Okamoto, H.; Okabe, K.; Yuri, Y.; Mohl, D.; Sessler, A.M.

    2004-01-01T23:59:59.000Z

    One-dimensional ordering of ultra-low density ion beams in ais applicable to an ultra-low density beam where collectiveabout 10 cm. In such an ultra-low density regime, no collec-

  14. Ultra-Low-Power Adder Stage Design for Exascale Floating Point Units

    E-Print Network [OSTI]

    Del Barrio, AA; Bagherzadeh, N; Hermida, R

    2014-01-01T23:59:59.000Z

    date: March 2014. Ultra-Low-Power Adder Stage Design fordate: March 2014. Ultra-Low-Power Adder Stage Design fordate: March 2014. Ultra-Low-Power Adder Stage Design for

  15. Development of a combustion technology for ultra-low emission (< 5 ppm nox) industrial burner

    E-Print Network [OSTI]

    Littlejohn, D.; Majeski, A.J.; Cheng, R.K.; Castaldini, C.

    2002-01-01T23:59:59.000Z

    Investigation of an Ultra-Low NO x Premixed CombustionInvestigation of an Ultra-Low NO x Premixed Combustioncombustion concept to achieve ultra-low emissions (NO x ? 2

  16. Ultra-low-loss high-aspect-ratio Si3N4 wavequides

    E-Print Network [OSTI]

    2011-01-01T23:59:59.000Z

    R. Gao, and A. Garito, “Ultra-Low-Loss Polymer Waveguides,”Ultra-low-loss high-aspect-ratio Si 3 N 4 waveguides Jaredan approach to make ultra-low-loss waveguides using stable

  17. Ultra-low field MRI of prostate cancer using SQUID detection

    E-Print Network [OSTI]

    Busch, Sarah Elizabeth

    2011-01-01T23:59:59.000Z

    coil. Chapter 3 3 Ultra low field MRI 3.1 Polarization TheUltra-low field MRI of prostate cancer using SQUID detectionSteven Conolly Spring 2011 Ultra-low field MRI of prostate

  18. Quadrature Rotating-Frame Gradient Fields for Ultra-Low Field Nuclear Magnetic Resonance and Imaging

    E-Print Network [OSTI]

    Bouchard, Louis-Serge

    2005-01-01T23:59:59.000Z

    Frame Gradient Fields For Ultra-Low Field Nuclear Magneticslow, as in the limit of ultra-low ?elds. In the ?rst case,B. Slice selection in ultra-low ?elds We ?rst examine the

  19. Electrical activation and spin coherence of ultra low dose antimony implants in silicon

    E-Print Network [OSTI]

    2005-01-01T23:59:59.000Z

    and spin coherence of ultra low dose antimony implants inClara, CA 95054 We implanted ultra low doses (0.2 to 2×10 11100 nm, corresponding to ultra low ion implantation doses of

  20. Dynamics of Propane in Silica Mesopores Formed upon Propylene Hydrogenation over Pt Nanoparticles by Time-Resolved FT-IR Spectroscopy

    E-Print Network [OSTI]

    Waslylenko, Walter; Frei, Heinz

    2008-01-01T23:59:59.000Z

    state distribution of propane between gas and mesopore phaseWavenumber (cm ) B Gas Phase Propane 2968 cm k 1 = 3.1 ± 0.4slices showing the gas phase propane component at 216, 648,

  1. Field Demonstration of High Efficiency Ultra-Low-Temperature...

    Broader source: Energy.gov (indexed) [DOE]

    Ultra-low temperature laboratory freezers (ULTs) are some of the most energy-intensive pieces of equipment in a scientific research laboratory, yet there are several barriers to...

  2. Charge pumping techniques in ultra-low current transconductor design 

    E-Print Network [OSTI]

    Becker-Gomez, Adriana

    2002-01-01T23:59:59.000Z

    The purpose of this thesis is to introduce the use of interface-trap charge pumping devices (ITCP) in an analog application based in ultra-low-current transconductors. This application naturally exploits the continuous nature of the current...

  3. An Advanced Ultra-Low Temperature Scanning Probe Microscope

    E-Print Network [OSTI]

    An Advanced Ultra-Low Temperature Scanning Probe Microscope P R O J E C T L E A D E R : Joseph); Steven Blankenship, Alan Band (NIST) G O A L To develop an ultra-high vacuum, ultra-low temperature, high of subpicometer stability and can operate in ultra-high vacuum at 10 mK, and in magnetic fields up to 15 T

  4. Correlation between homogeneous propane pyrolysis and pyrocarbon deposition

    E-Print Network [OSTI]

    Boyer, Edmond

    Correlation between homogeneous propane pyrolysis and pyrocarbon deposition C´edric Descamps, G propane pyrolysis is studied in a 1-D hot-wall CVD furnace. The gas-phase pyrolysis is modelled in previous reports [6]: total pressure equal to 2 kPa, temperature between 900 K and 1400 K, and pure propane

  5. Study of the Low Temperature Oxidation of Propane Maximilien Cord

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Study of the Low Temperature Oxidation of Propane Maximilien Cord , Benoit Husson , Juan of China, Hefei, Anhui 230029, P. R. China Abstract The lowtemperature oxidation of propane oxidation of propane in the gas phase has been the subject of very few experimental studies, mainly

  6. Ultra-low velocities and Superplumes Garnero, Thorne, McNamara, Rost [2005

    E-Print Network [OSTI]

    Garnero, Ed

    Ultra-low velocities and Superplumes Garnero, Thorne, McNamara, Rost [2005] - 1- Fine-scale ultra-low, Arizona 85287-1404 USA Abstract. Ultra-low velocity layering at Earth's core-mantle boundary has now been in the overlying few hundred km of the mantle. Ultra-low velocity zones contain properties consistent with partial

  7. An Ultra-Low-Power Analog Memory System with an Adaptive Sampling Rate

    E-Print Network [OSTI]

    Graham, David W.

    An Ultra-Low-Power Analog Memory System with an Adaptive Sampling Rate Brandon M. Kelly, Brandon normally associated with sleep states in WSNs, we introduce an ultra-low-power analog memory buffer in which ultra- low-power operation is a necessity. In this paper, we propose an ultra-low-power analog mem

  8. Ultra Low NOx Catalytic Combustion for IGCC Power Plants

    SciTech Connect (OSTI)

    Shahrokh Etemad; Benjamin Baird; Sandeep Alavandi; William Pfefferle

    2008-03-31T23:59:59.000Z

    In order to meet DOE's goals of developing low-emissions coal-based power systems, PCI has further developed and adapted it's Rich-Catalytic Lean-burn (RCL{reg_sign}) catalytic reactor to a combustion system operating on syngas as a fuel. The technology offers ultra-low emissions without the cost of exhaust after-treatment, with high efficiency (avoidance of after-treatment losses and reduced diluent requirements), and with catalytically stabilized combustion which extends the lower Btu limit for syngas operation. Tests were performed in PCI's sub-scale high-pressure (10 atm) test rig, using a two-stage (catalytic then gas-phase) combustion process for syngas fuel. In this process, the first stage consists of a fuel-rich mixture reacting on a catalyst with final and excess combustion air used to cool the catalyst. The second stage is a gas-phase combustor, where the air used for cooling the catalyst mixes with the catalytic reactor effluent to provide for final gas-phase burnout and dilution to fuel-lean combustion products. During testing, operating with a simulated Tampa Electric's Polk Power Station syngas, the NOx emissions program goal of less than 0.03 lbs/MMBtu (6 ppm at 15% O{sub 2}) was met. NOx emissions were generally near 0.01 lbs/MMBtu (2 ppm at 15% O{sub 2}) (PCI's target) over a range on engine firing temperatures. In addition, low emissions were shown for alternative fuels including high hydrogen content refinery fuel gas and low BTU content Blast Furnace Gas (BFG). For the refinery fuel gas increased resistance to combustor flashback was achieved through preferential consumption of hydrogen in the catalytic bed. In the case of BFG, stable combustion for fuels as low as 88 BTU/ft{sup 3} was established and maintained without the need for using co-firing. This was achieved based on the upstream catalytic reaction delivering a hotter (and thus more reactive) product to the flame zone. The PCI catalytic reactor was also shown to be active in ammonia reduction in fuel allowing potential reductions in the burner NOx production. These reductions of NOx emissions and expanded alternative fuel capability make the rich catalytic combustor uniquely situated to provide reductions in capital costs through elimination of requirements for SCR, operating costs through reduction in need for NOx abating dilution, SCR operating costs, and need for co-firing fuels allowing use of lower value but more available fuels, and efficiency of an engine through reduction in dilution flows.

  9. Low-voltage ultra-low-poweranalog IC design -djmamic translinearcircuits 1.3.1 1.3 Low-voltage ultra-low-power analog IC design

    E-Print Network [OSTI]

    Serdijn, Wouter A.

    Low-voltage ultra-low-poweranalog IC design -djmamic translinearcircuits 1.3.1 1.3 Low-voltage ultra-low-power analog IC design -dynamic translinear circuits 0 (rg G x m .- E . . . . . a r, a" P, 44' s" +N m - _ c o3 #12;Low-voltage ultra-low-power analog IC design -dynamic translinear circuits I

  10. Spintronic switches for ultra low energy global interconnects

    SciTech Connect (OSTI)

    Sharad, Mrigank, E-mail: msharad@purdue.edu; Roy, Kaushik [School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)

    2014-05-07T23:59:59.000Z

    We present ultra-low energy interconnect design using nano-scale spin-torque (ST) switches for global data-links. Emerging spin-torque phenomena can lead to ultra-low-voltage, high-speed current-mode magnetic-switches. ST-switches can simultaneously provide large trans-impedance gain by employing magnetic tunnel junctions, to convert current-mode signals into large-swing voltage levels. Such device-characteristics can be used in the design of energy-efficient current-mode global interconnects.

  11. Propane on Titan

    E-Print Network [OSTI]

    H. G. Roe; T. K. Greathouse; M. J. Richter; J. H. Lacy

    2003-09-23T23:59:59.000Z

    We present the first observations of propane (C$_3$H$_8$) on Titan that unambiguously resolve propane features from other numerous stratospheric emissions. This is accomplished using a $R=\\lambda/\\delta\\lambda\\approx10^5$ spectrometer (TEXES) to observe propane's $\

  12. Ultra-Low NOx Advanced Vortex Combustor

    SciTech Connect (OSTI)

    Edmonds, R.G. (Ramgen Power Systems, Inc., Bellevue, WA); Steele, R.C. (Ramgen Power Systems, Inc., Bellevue, WA); Williams, J.T. (Ramgen Power Systems, Inc., Bellevue, WA); Straub, D.L.; Casleton, K.H.; Bining, Avtar (California Energy Commission, Sacramento, CA)

    2006-05-01T23:59:59.000Z

    An ultra lean-premixed Advanced Vortex Combustor (AVC) has been developed and tested. The natural gas fueled AVC was tested at the U.S. Department of Energy’s National Energy Technology Laboratory (USDOE NETL) test facility in Morgantown (WV). All testing was performed at elevated pressures and inlet temperatures and at lean fuel-air ratios representative of industrial gas turbines. The improved AVC design exhibited simultaneous NOx/CO/UHC emissions of 4/4/0 ppmv (all emissions are at 15% O2 dry). The design also achieved less than 3 ppmv NOx with combustion efficiencies in excess of 99.5%. The design demonstrated tremendous acoustic dynamic stability over a wide range of operating conditions which potentially makes this approach significantly more attractive than other lean premixed combustion approaches. In addition, a pressure drop of 1.75% was measured which is significantly lower than conventional gas turbine combustors. Potentially, this lower pressure drop characteristic of the AVC concept translates into overall gas turbine cycle efficiency improvements of up to one full percentage point. The relatively high velocities and low pressure drops achievable with this technology make the AVC approach an attractive alternative for syngas fuel applications.

  13. ULTRA-LOW NOX ADVANCED VORTEX COMBUSTOR

    SciTech Connect (OSTI)

    Ryan G. Edmonds; Robert C. Steele; Joseph T. Williams; Douglas L. Straub; Kent H. Casleton; Avtar Bining

    2006-05-01T23:59:59.000Z

    An ultra lean-premixed Advanced Vortex Combustor (AVC) has been developed and tested. The natural gas fueled AVC was tested at the U.S. Department of Energy’s National Energy Technology Laboratory (USDOE NETL) test facility in Morgantown (WV). All testing was performed at elevated pressures and inlet temperatures and at lean fuel-air ratios representative of industrial gas turbines. The improved AVC design exhibited simultaneous NOx/CO/UHC emissions of 4/4/0 ppmv (all emissions are at 15% O2 dry). The design also achieved less than 3 ppmv NOx with combustion efficiencies in excess of 99.5%. The design demonstrated tremendous acoustic dynamic stability over a wide range of operating conditions which potentially makes this approach significantly more attractive than other lean premixed combustion approaches. In addition, a pressure drop of 1.75% was measured which is significantly lower than conventional gas turbine combustors. Potentially, this lower pressure drop characteristic of the AVC concept translates into overall gas turbine cycle efficiency improvements of up to one full percentage point. The relatively high velocities and low pressure drops achievable with this technology make the AVC approach an attractive alternative for syngas fuel applications.

  14. Measurements of ultra-low-energy electron scattering cross sections of atoms and molecules

    SciTech Connect (OSTI)

    Kitajima, M.; Shigemura, K.; Kurokawa, M. [Department of Chemistry, Tokyo Institute of Technology, 152-8551 Tokyo (Japan); Odagiri, T. [Department of Physics, Sophia University, 102-8554 Tokyo, Japan and Department of Chemistry, Tokyo Institute of Technology, 152-8551 Tokyo (Japan); Kato, H.; Hoshino, M.; Tanaka, H. [Department of Physics, Sophia University, 102-8554 Tokyo (Japan); Ito, K. [Photon Factory, Institute of Materials Structure Science, 305-0801 Tsukuba (Japan)

    2014-03-05T23:59:59.000Z

    A new experimental technique for the total cross section measurements of ultra-low energy electron collisions with atoms and molecules utilizing the synchrotron radiation is presented. The technique employs a combination of the penetrating field technique and the threshold photoionization of rare gas atoms using the synchrotron radiation as an electron source in order to produce a high resolution electron beam at very low energy. Absolute total cross sections for electron scattering from He, Ne, Ar, Kr, and Xe in the energy region from extremely low electron energy to 20 eV are presented.

  15. Nationwide: Southeast Propane Autogas Development Program Brings...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Southeast Propane Autogas Development Program Brings 1200 Propane Vehicles to the Road Nationwide: Southeast Propane Autogas Development Program Brings 1200 Propane Vehicles to the...

  16. High-Efficiency, Ultra-Low Emission Combustion in a Heavy-Duty...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Efficiency, Ultra-Low Emission Combustion in a Heavy-Duty Engine via Fuel Reactivity Control High-Efficiency, Ultra-Low Emission Combustion in a Heavy-Duty Engine via Fuel...

  17. Low-Temperature Combustion for High-Efficiency, Ultra-Low Emission...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Low-Temperature Combustion for High-Efficiency, Ultra-Low Emission Engines Low-Temperature Combustion for High-Efficiency, Ultra-Low Emission Engines Presentation given at DEER...

  18. Calibration of an ultra-low-background proportional counter for measuring {sup 37}Ar

    SciTech Connect (OSTI)

    Seifert, A.; Aalseth, C. E.; Bonicalzi, R. M.; Bowyer, T. W.; Day, A. R.; Fuller, E. S.; Haas, D. A.; Hayes, J. C.; Hoppe, E. W.; Humble, P. H.; Keillor, M. E.; LaFerriere, B. D.; Mace, E. K.; McIntyre, J. I.; Merriman, J. H.; Miley, H. S.; Myers, A. W.; Orrell, J. L.; Overman, C. T.; Panisko, M. E. [Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington, 99352 (United States)] [Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington, 99352 (United States); and others

    2013-08-08T23:59:59.000Z

    An ultra-low-background proportional counter design has been developed at Pacific Northwest National Laboratory (PNNL) using clean materials, primarily electro-chemically-purified copper. This detector, along with an ultra-low-background counting system (ULBCS), was developed to complement a new shallow underground laboratory (30 meters water-equivalent) at PNNL. The ULBCS design includes passive neutron and gamma shielding, along with an active cosmic-veto system. This system provides a capability for making ultra-sensitive measurements to support applications like age-dating soil hydrocarbons with {sup 14}C/{sup 3}H, age-dating of groundwater with {sup 39}Ar, and soil-gas assay for {sup 37}Ar to support On-Site Inspection (OSI). On-Site Inspection is a key component of the verification regime for the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Measurements of radionuclides created by an underground nuclear explosion are valuable signatures of a Treaty violation. For OSI, the 35-day half-life of {sup 37}Ar, produced from neutron interactions with calcium in soil, provides both high specific activity and sufficient time for inspection before decay limits sensitivity. This work describes the calibration techniques and analysis methods developed to enable quantitative measurements of {sup 37}Ar samples over a broad range of proportional counter operating pressures. These efforts, along with parallel work in progress on gas chemistry separation, are expected to provide a significant new capability for {sup 37}Ar soil gas background studies.

  19. Tracking deep mantle reservoirs with ultra-low velocity zones Allen K. McNamara a,

    E-Print Network [OSTI]

    Rhoads, James

    Tracking deep mantle reservoirs with ultra-low velocity zones Allen K. McNamara a, , Edward J, that directly overlies the core-mantle boundary (CMB). These regions have been dubbed Ultra-Low Velocity Zones. Introduction For over 15 yrs seismologists have mapped regions of ultra-low P- and S-wave velocities

  20. SAFETY EFFECTIVENESS OF STOP CONTROL AT ULTRA-LOW VOLUME UNPAVED INTERSECTIONS

    E-Print Network [OSTI]

    Carriquiry, Alicia

    SAFETY EFFECTIVENESS OF STOP CONTROL AT ULTRA-LOW VOLUME UNPAVED INTERSECTIONS Corresponding Author,494 #12;Souleyrette, Tenges, McDonald, Maze, Carriquiry 1 SAFETY EFFECTIVENESS OF STOP CONTROL AT ULTRA-LOW regression and hierarchical Poisson estimation. For ultra-low volume intersections, under 150 vehicles per

  1. Centralized Routing Protocol for Wireless Sensor Networks with Ultra Low Duty Cycle to Achieve Maximum Lifetime

    E-Print Network [OSTI]

    Bahk, Saewoong

    Centralized Routing Protocol for Wireless Sensor Networks with Ultra Low Duty Cycle to Achieve performance because most of them are designed without considering a ultra low duty cycled environment to improve a network lifetime and a routing maintenance cost. We explain the issues of a ultra low duty

  2. Challenge: Ultra-Low-Power Energy-Harvesting Active Networked Tags (EnHANTs)

    E-Print Network [OSTI]

    Zussman, Gil

    Challenge: Ultra-Low-Power Energy-Harvesting Active Networked Tags (EnHANTs) Maria Gorlatova, Peter posed by a new class of ultra-low-power devices referred to as Energy-Harvesting Ac- tive Networked Tags), and determining locations of disaster sur- vivors. Recent advances in ultra-low-power wireless communica- tions

  3. ULTRA LOW PRESSURE-DROP HELIUM-COOLED POROUS-TUNGSTEN PFC S. Sharafat1

    E-Print Network [OSTI]

    Ghoniem, Nasr M.

    ULTRA LOW PRESSURE-DROP HELIUM-COOLED POROUS-TUNGSTEN PFC S. Sharafat1 , A. Mills1 , D. Youchison2/s. Based on these impressive performance results, a unique and scalable heat exchanger channel with ultra-low and ultra low-pressure drop short flow-path (SOFIT) concept was designed. Typical pressure drops through

  4. Integrated Ultra-Low-Loss 4-Bit Tunable Delay for Broadband Phased Array Antenna Applications

    E-Print Network [OSTI]

    2013-01-01T23:59:59.000Z

    F. Bauters, et al. , “Ultra-low-loss high-aspect-ratio Si3N4JUNE 15, 2013 Integrated Ultra-Low-Loss 4-Bit Tunable Delaya 4-bit tunable delay in an ultra-low-loss Si 3 N 4 planar

  5. LP3853/LP3856 3A Fast Response Ultra Low Dropout Linear Regulators

    E-Print Network [OSTI]

    Berns, Hans-Gerd

    LP3853/LP3856 3A Fast Response Ultra Low Dropout Linear Regulators General Description The LP3853/LP3856 series of fast ultra low-dropout linear regulators operate from a +2.5V to +7.0V input supply. Wide range of preset output voltage options are available. These ultra low dropout linear regulators

  6. Suppressing Multi-Channel Ultra-Low-Field MRI Measurement Noise Using Data Consistency and Image

    E-Print Network [OSTI]

    Suppressing Multi-Channel Ultra-Low-Field MRI Measurement Noise Using Data Consistency and Image of Mathematics, National Taiwan University, Taipei, Taiwan, 4 Elekta Oy, Helsinki, Finland Abstract Ultra-low. (2013) Suppressing Multi-Channel Ultra-Low-Field MRI Measurement Noise Using Data Consistency and Image

  7. Aerodynamic Shape Optimization of Airfoils in Ultra-Low Reynolds Number Flow using

    E-Print Network [OSTI]

    Stanford University

    Aerodynamic Shape Optimization of Airfoils in Ultra-Low Reynolds Number Flow using Simultaneous;Aerodynamic Shape Optimization of Airfoils in Ultra-Low Reynolds Number Flow using Simultaneous Pseudo Abstract. The paper presents numerical results of optimized airfoils at ultra-low Reynolds numbers

  8. Fluctuation-induced dynamics of multiphase liquid jets with ultra-low interfacial tension

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Fluctuation-induced dynamics of multiphase liquid jets with ultra-low interfacial tension Alban with an ultra-low interfacial tension presents new opportunities to the control of flow morphologies perturbation; this demonstrates the importance of the inertial effects in flow control at ultra-low interfacial

  9. Energy Efficient Routing Protocol for Wireless Sensor Networks with Ultra Low Duty Cycle

    E-Print Network [OSTI]

    Bahk, Saewoong

    Energy Efficient Routing Protocol for Wireless Sensor Networks with Ultra Low Duty Cycle Wooguil of high energy consumption mainly caused by the clock drift in ultra low duty cycled environments because most of them are designed without considering ultra low duty cycled environments. To achieve

  10. An Ultra Low Power SIMD Processor for Wireless Devices , Sangwon Seo1

    E-Print Network [OSTI]

    Kambhampati, Subbarao

    An Ultra Low Power SIMD Processor for Wireless Devices Mark Woh1 , Sangwon Seo1 , Chaitali, Tempe, AZ {mwoh,swseo,mahlke,tnm}@umich.edu chaitali@asu.edu ABSTRACT This paper presents an ultra low executed. For ultra low power operation, we advocate operating the processor at near threshold volt- age

  11. Pipeline Strategy for Improving Optimal Energy Efficiency in Ultra-Low Voltage Design

    E-Print Network [OSTI]

    Kambhampati, Subbarao

    Pipeline Strategy for Improving Optimal Energy Efficiency in Ultra-Low Voltage Design Mingoo Seok for the ultra low voltage regime. Based on an analytical model and simulations, we propose a pipelining technique that provides higher energy effi- ciency and performance than conventional approaches to ultra low

  12. Effectiveness of Ultra-Low Volume Nighttime Applications of an Adulticide against Diurnal Aedes

    E-Print Network [OSTI]

    Effectiveness of Ultra-Low Volume Nighttime Applications of an Adulticide against Diurnal Aedes and dengue. Vector control programs rarely attempt to suppress this diurnal species with an ultra-low volume, Gaugler R, Fonseca DM (2012) Effectiveness of Ultra-Low Volume Nighttime Applications of an Adulticide

  13. Invited Paper Ultra-low-power Electronics for Non-invasive

    E-Print Network [OSTI]

    Sarpeshkar, Rahul

    Invited Paper Ultra-low-power Electronics for Non-invasive Medical Monitoring L. Turicchia1 , S on the monitoring of the heart--because of its importance--and we describe a micropower electrocardiograph, an ultra-low-power pulse oximeter, an ultra-low-power phonocardiograph, an integrated- circuit switched-capacitor model

  14. An Ultra Low Power CMOS pA/V Transconductor and its Application to Wavelet Filters

    E-Print Network [OSTI]

    Serdijn, Wouter A.

    An Ultra Low Power CMOS pA/V Transconductor and its Application to Wavelet Filters Peterson R topologies of ultra low-power CMOS triode transconductor are proposed. Its input transistors are kept with an extremely small transconductance gm is needed. This paper presents two topologies of ultra low

  15. Telos: Enabling Ultra-Low Power Wireless Research Joseph Polastre, Robert Szewczyk, and David Culler

    E-Print Network [OSTI]

    Culler, David E.

    Telos: Enabling Ultra-Low Power Wireless Research Joseph Polastre, Robert Szewczyk, and David,szewczyk,culler}@cs.berkeley.edu Abstract-- We present Telos, an ultra low power wireless sensor module ("mote") for research and 128kB of flash), extensive sensor interfaces (8 analog lines, several digital IO Fig. 1. Telos ultra-low

  16. Ultra-Low Power DLMS Adaptive Filter For Hearing Aid Applications

    E-Print Network [OSTI]

    Kim, Chris H.

    Ultra-Low Power DLMS Adaptive Filter For Hearing Aid Applications Hyung-il Kim Purdue University, USA +1-765-494-2361 kaushik@ecn.purdue.edu ABSTRACT We present an ultra-low power DLMS (delayed least suitable application areas for sub-threshold logic since ultra-low power consumption takes first priority

  17. An ultra-low voltage high gain operational transconductance amplifier for biomedical

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    An ultra-low voltage high gain operational transconductance amplifier for biomedical applications that work at ultra low voltage power supply. Moreover, low power dissipation is essential in these systems dissipation is also proposed in [5]. Differential pairs are commonly used as input stages, in an ultra-low

  18. An Ultra-Low-Power Human Body Motion Sensor Using Static Electric Field Sensing

    E-Print Network [OSTI]

    Hunt, Galen

    An Ultra-Low-Power Human Body Motion Sensor Using Static Electric Field Sensing Gabe Cohn1 an ultra-low-power method for pas- sively sensing body motion using static electric fields by measuring to infer the amount and type of body motion anywhere on the body and demonstrate an ultra-low-power motion

  19. Performance of plasma sputtered Fuel Cell electrodes with ultra-low Pt M. Cavarroca

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Performance of plasma sputtered Fuel Cell electrodes with ultra-low Pt loadings M. Cavarroca , A. Abstract Ultra-low Pt content PEMFC electrodes have been manufactured using magnetron co- sputtering cell; Plasma sputtering deposition; ultra low platinum loading * Corresponding author: Fax: +33 2 38 41

  20. Variation-aware Clock Network Design Methodology for Ultra-Low Voltage (ULV) Circuits

    E-Print Network [OSTI]

    Lim, Sung Kyu

    Variation-aware Clock Network Design Methodology for Ultra-Low Voltage (ULV) Circuits Xin Zhao networks for ultra-low voltage (ULV) circuits. We show that both clock slew and skew play important roles) at comparable or even higher Fmax compared with the existing methods. Keywords--clock network design, ultra-low

  1. Efficient Concomitant and Remanence Field Artifact Reduction in Ultra-Low-Field MRI Using a

    E-Print Network [OSTI]

    Efficient Concomitant and Remanence Field Artifact Reduction in Ultra-Low-Field MRI Using: For ultra-low-field MRI, the spatial-encoding mag- netic fields generated by gradient coils can have strong to pre-polarize magnetization can improve the signal-to-noise ratio of ultra- low-field MRI. Yet

  2. Ultra-Low Wearing Nanocomposites-How Low Can We Go? Angela Pitenis

    E-Print Network [OSTI]

    Roy, Subrata

    Ultra-Low Wearing Nanocomposites- How Low Can We Go? Angela Pitenis You know more about tribology), this new material, a nanocomposite, is able to achieve ultra-low wear (k~7x10-8 mm3 /(Nm)). This means limits of this ultra-low wearing nanocomposite. Our most recent experiments were conducted in a broad

  3. Bulk CMOS Device Optimization for High-Speed and Ultra-Low Power Operations

    E-Print Network [OSTI]

    Nyathi, Jabulani

    Bulk CMOS Device Optimization for High-Speed and Ultra-Low Power Operations Brent Bero and Jabulani- Interest in subthreshold design has increased due to the emergence of systems that require ultra-low power creating a clear divide between designing for high speed and ultra-low power. It might be beneficial

  4. A Hybrid Adiabatic Content Addressable Memory for Ultra Low-Power Applications

    E-Print Network [OSTI]

    Tessier, Russell

    A Hybrid Adiabatic Content Addressable Memory for Ultra Low-Power Applications Aiyappan Natarajan/write operation. The adiabatic CAM is suitable for ultra low-power, low per- formance applications such as smart, Performance Keywords Ultra-low power, Energy recovery, adiabatic switching 1. INTRODUCTION Content Addressable

  5. Environmental fate model for ultra-low-volume insecticide applications used for adult mosquito management

    E-Print Network [OSTI]

    Peterson, Robert K. D.

    Environmental fate model for ultra-low-volume insecticide applications used for adult mosquito T S No model can accurately predict deposition of insecticides applied with ultra-low-volume technology of insecticides. We develop a validated model to predict the deposition of insecticides after ultra-low

  6. Cryptography for Ultra-Low Power Devices Jens-Peter Kaps

    E-Print Network [OSTI]

    Cryptography for Ultra-Low Power Devices by Jens-Peter Kaps A Dissertation Submitted to the Faculty classify them as ultra-low power devices. Early sensor nodes used simple 8-bit microprocessors to implement of cryptographic algorithms tailored for ultra-low power applications. The goal of this dissertation is to de

  7. Heat capacity of adsorbed Helium-3 at ultra-low temperatures

    E-Print Network [OSTI]

    Boyer, Edmond

    Heat capacity of adsorbed Helium-3 at ultra-low temperatures J. Elbs, C. Winkelmann, Yu. M. Bunkov of monolayers of 3He adsorbed on the surface of a cell filled with superfluid 3He. We found that at ultra low in the limit of ultra low temperatures. 1. INTRODUCTION A closed cell with a small orifice, immersed

  8. An atom trap trace analysis (ATTA) system for measuring ultra-low contamination by krypton in

    E-Print Network [OSTI]

    Zelevinsky, Tanya

    An atom trap trace analysis (ATTA) system for measuring ultra-low contamination by krypton in xenon ultra-low contamination by krypton in xenon dark matter detectors Tae Hyun Yoon The XENON dark matter analysis (ATTA) device to detect the ultra-low kryp- ton concentration in the xenon target. This project

  9. Analysis, Design, and Testing of Airfoils for Use at Ultra-Low Reynolds Numbers

    E-Print Network [OSTI]

    Stanford University

    Analysis, Design, and Testing of Airfoils for Use at Ultra- Low Reynolds Numbers Peter J. Kunz Ilan M. Kroo Abstract: Advances in technology have begun to make ultra-low Reynolds number flight a real of the relevant aerodynamics. A reasonable starting point is the study of airfoil section aerodynamics at ultra-low

  10. All-optical remote monitoring of propane gas using a 5-km-long, low-loss optical fiber link and an InGaP light-emitting diode in the 1. 68-. mu. m region

    SciTech Connect (OSTI)

    Chan, K.; Ito, H.; Inaba, H.

    1984-08-01T23:59:59.000Z

    We report the fully optical remote detection of low-level propane (C/sub 3/H/sub 8/) gas realized by the scheme based on a long distance, very low-loss silica optical fiber link connected to a compact absorption cell in conjunction with a high radiant InGaP light-emitting diode at 1.68 ..mu..m. For this application, the near-infrared absorption spectrum of propane was measured and studied to find very complicated bands around 1.69, 1.53, and 1.38 ..mu..m. This simple system, employing a 5-km-long silica optical fiber link, was demonstrated to be capable of achieving reproducibly the detection sensitivity less than 2.4 Torr for propane gas in air, i.e., about 14% of the lower explosion limit of propane density. This result verifies a large capability for major applications to various strategic points within the environment, such as industrial complexes as well as urban and residential areas, with considerably increased reliability and safety over the existing techniques.

  11. Ultra-low-loss tapered optical fibers with minimal lengths

    E-Print Network [OSTI]

    Ryutaro Nagai; Takao Aoki

    2014-11-09T23:59:59.000Z

    We design and fabricate ultra-low-loss tapered optical fibers (TOFs) with minimal lengths. We first optimize variations of the torch scan length using the flame-brush method for fabricating TOFs with taper angles that satisfy the adiabaticity criteria. We accordingly fabricate TOFs with optimal shapes and compare their transmission to TOFs with a constant taper angle and TOFs with an exponential shape. The highest transmission measured for TOFs with an optimal shape is in excess of 99.7 % with a total TOF length of only 23 mm, whereas TOFs with a constant taper angle of 2 mrad reach 99.6 % transmission for a 63 mm TOF length.

  12. Cryostat for Ultra-low-energy Threshold Germanium Spectrometers

    SciTech Connect (OSTI)

    Aalseth, Craig E.; Bonicalzi, Ricco; Fast, James E.; Hossbach, Todd W.; Orrell, John L.; Overman, Cory T.; VanDevender, Brent A.

    2013-04-01T23:59:59.000Z

    Abstract: This paper presents progress on the development of a cryostat intended to improve upon the low-energy threshold (below 0.5 keV) of p-type point contact germanium gamma-ray spectrometers. Ultra-low energy thresholds are important in the detection of low-energy nuclear recoils, an event class relevant to both dark matter direct detection and measurement of coherent neutrino-nucleus scattering. The cryostat design, including a thermal and electrical-field model, is presented. A prototype cryostat has been assembled and data acquired to evaluate its vacuum and thermal performance.

  13. Cryostat for Ultra-low-energy Threshold Germanium Spectrometers

    E-Print Network [OSTI]

    Craig E. Aalseth; Ricco M. Bonicalzi; James E. Fast; Todd W. Hossbach; John L. Orrell; Cory T. Overman; Brent A. Vandevender

    2012-10-08T23:59:59.000Z

    This paper presents progress on the development of a cryostat intended to improve upon the low-energy threshold (below 0.5 keV) of p-type point contact germanium gamma-ray spectrometers. Ultra-low energy thresholds are important in the detection of low-energy nuclear recoils, an event class relevant to both dark matter direct detection and measurement of coherent neutrino-nucleus scattering. The cryostat design, including a thermal and electrical-field model, is given. A prototype cryostat has been assembled and data acquired to evaluate its vacuum and thermal performance.

  14. GRABGAM Analysis of Ultra-Low-Level HPGe Gamma Spectra

    SciTech Connect (OSTI)

    Winn, W.G.

    1999-07-28T23:59:59.000Z

    The GRABGAM code has been used successfully for ultra-low level HPGe gamma spectrometry analysis since its development in 1985 at Savannah River Technology Center (SRTC). Although numerous gamma analysis codes existed at that time, reviews of institutional and commercial codes indicated that none addressed all features that were desired by SRTC. Furthermore, it was recognized that development of an in-house code would better facilitate future evolution of the code to address SRTC needs based on experience with low-level spectra. GRABGAM derives its name from Gamma Ray Analysis BASIC Generated At MCA/PC.

  15. PPPL3161 Preprint Date: February 1996, UC420, 426, 427 Global Stability Study of the Ultra Low Aspect Ratio Tokamak,

    E-Print Network [OSTI]

    Low Aspect Ratio Tokamak, Global Stability Study of the Ultra Low Aspect Ratio Tokamak, Global Stability Study of the Ultra Low Aspect Ratio Tokamak, Global Stability Study of the Ultra Low Aspect Ratio Tokamak, Global Stability Study of the Ultra Low Aspect Ratio Tokamak, ULART ULART ULART ULART ULART M

  16. 2566 IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 55, NO. 5, OCTOBER 2008 Virtual Colonoscopy Screening With Ultra Low-Dose

    E-Print Network [OSTI]

    Screening With Ultra Low-Dose CT and Less-Stressful Bowel Preparation: A Computer Simulation Study Jing Wang a simulation study to demonstrate a possible ultra low-dose CT technique for VC. The ultra low-dose abdominal by a filtered backprojection algorithm for the ultra low-dose CT im- ages. The patient-specific virtual colon

  17. PPPL-3161 -Preprint Date: February 1996, UC-420, 426, 427 Global Stability Study of the Ultra Low Aspect Ratio Tokamak,Global Stability Study of the Ultra Low Aspect Ratio Tokamak,Global Stability Study of the Ultra Low Aspect Ratio Tokamak,Global Stabili

    E-Print Network [OSTI]

    Low Aspect Ratio Tokamak,Global Stability Study of the Ultra Low Aspect Ratio Tokamak,Global Stability Study of the Ultra Low Aspect Ratio Tokamak,Global Stability Study of the Ultra Low Aspect Ratio Tokamak,Global Stability Study of the Ultra Low Aspect Ratio Tokamak, ULARTULARTULARTULARTULART M. Yamada1, A. Morita2, N

  18. Design Considerations for Large Mass Ultra-Low Background Experiments

    SciTech Connect (OSTI)

    Aguayo Navarrete, Estanislao; Reid, Douglas J.; Fast, James E.; Orrell, John L.

    2011-07-01T23:59:59.000Z

    Summary The objective of this document is to present the designers of the next generation of large-mass, ultra-low background experiments with lessons learned and design strategies from previous experimental work. Design issues divided by topic into mechanical, thermal and electrical requirements are addressed. Large mass low-background experiments have been recognized by the scientific community as appropriate tools to aid in the refinement of the standard model. The design of these experiments is very costly and a rigorous engineering review is required for their success. The extreme conditions that the components of the experiment must withstand (heavy shielding, vacuum/pressure and temperature gradients), in combination with unprecedented noise levels, necessitate engineering guidance to support quality construction and safe operating conditions. Physical properties and analytical results of typical construction materials are presented. Design considerations for achieving ultra-low-noise data acquisition systems are addressed. Five large-mass, low-background conceptual designs for the one-tonne scale germanium experiment are proposed and analyzed. The result is a series of recommendations for future experiments engineering and for the Majorana simulation task group to evaluate the different design approaches.

  19. Development of a low swirl injector concept for gas turbines

    E-Print Network [OSTI]

    Cheng, R.K.; Fable, S.A.; Schmidt, D.; Arellano, L.; Smith, K.O.

    2000-01-01T23:59:59.000Z

    Injector Concept for Gas Turbines Robert K. Cheng * , Scottconcept for ultra- low NO x gas turbines. Low-swirl flamevirtually every industrial gas turbine manufacturer to meet

  20. High-Efficiency, Ultra-Low Emission Combustion in a Heavy-Duty...

    Broader source: Energy.gov (indexed) [DOE]

    Efficiency, Ultra-Low Emission Combustion in a Heavy-Duty Engine via Fuel Reactivity Control Rolf D. Reitz, Reed Hanson, Derek Splitter, Sage Kokjohn Engine Research Center...

  1. Propane Vehicle Demonstration Grant Program

    SciTech Connect (OSTI)

    Jack Mallinger

    2004-08-27T23:59:59.000Z

    Project Description: Propane Vehicle Demonstration Grants The Propane Vehicle Demonstration Grants was established to demonstrate the benefits of new propane equipment. The US Department of Energy, the Propane Education & Research Council (PERC) and the Propane Vehicle Council (PVC) partnered in this program. The project impacted ten different states, 179 vehicles, and 15 new propane fueling facilities. Based on estimates provided, this project generated a minimum of 1,441,000 new gallons of propane sold for the vehicle market annually. Additionally, two new off-road engines were brought to the market. Projects originally funded under this project were the City of Portland, Colorado, Kansas City, Impco Technologies, Jasper Engines, Maricopa County, New Jersey State, Port of Houston, Salt Lake City Newspaper, Suburban Propane, Mutual Liquid Propane and Ted Johnson.

  2. Ultra-low density microcellular polymer foam and method

    DOE Patents [OSTI]

    Simandl, R.F.; Brown, J.D.

    1996-03-19T23:59:59.000Z

    An ultra-low density, microcellular open-celled polymer foam and a method for making such foam are disclosed. A polymer is dissolved in a heated solution consisting essentially of at least one solvent for the dissolution of the polymer in the heated solution and the phase inversion of the dissolved polymer to a liquid gel upon sufficient cooling of the heated solution. The heated solution is contained in a containment means provided with a nucleating promoting means having a relatively rough surface formed of fixed nucleating sites. The heated solution is cooled for a period of time sufficient to form a liquid gel of the polymer by phase inversion. From the gel, a porous foam having a density of less than about 12.0 mg/cm{sup 3} and open porosity provided by well interconnected strut morphology is formed.

  3. Ultra-Low Amplitude Cepheids in the Large Magellanic Cloud

    E-Print Network [OSTI]

    J. Robert Buchler; Peter R. Wood; Stefan Keller; Igor Soszynski

    2005-08-26T23:59:59.000Z

    The MACHO variables of LMC Field 77 that lie in the vicinity of the Cepheid instability strip are reexamined. Among the 144 variables that we identify as Cepheids we find 14 that have Fourier amplitudes ultra-low amplitude (ULA) Cepheids. The variability of these objects is verified by a comparison of the MACHO red with the MACHO blue lightcurves and with those of the corresponding OGLE LMC stars. The occurrence of ULA Cepheids is in agreement with theory. We have also discovered 2 low amplitude variables whose periods are about a factor of 5--6 smaller than those of F Cepheids of equal apparent magnitude. We suggest that these objects are Cepheids undergoing pulsations in a surface mode and that they belong to a novel class of Strange Cepheids (or Surface Mode Cepheids) whose existence was predicted by Buchler et al. (1997).

  4. Ultra-low density microcellular polymer foam and method

    DOE Patents [OSTI]

    Simandl, Ronald F. (Farragut, TN); Brown, John D. (Harriman, TN)

    1996-01-01T23:59:59.000Z

    An ultra-low density, microcellular open-celled polymer foam and a method for making such foam. A polymer is dissolved in a heated solution consisting essentially of at least one solvent for the dissolution of the polymer in the heated solution and the phase inversion of the dissolved polymer to a liquid gel upon sufficient cooling of the heated solution. The heated solution is contained in a containment means provided with a nucleating promoting means having a relatively rough surface formed of fixed nucleating sites. The heated solution is cooled for a period of time sufficient to form a liquid gel of the polymer by phase inversion. From the gel, a porous foam having a density of less than about 12.0 mg/cm.sup.3 and open porosity provided by well interconnected strut morphology is formed.

  5. Molecular Caulk: A Pore Sealing Technology for Ultra-low k Dielectrics Jay J. Senkevich1

    E-Print Network [OSTI]

    Wang, Gwo-Ching

    Molecular Caulk: A Pore Sealing Technology for Ultra-low k Dielectrics Jay J. Senkevich1 Washington Ave., Albany, NY 12222 Abstract Much effort has been undertaken to develop high performance ultra-low k ( 2.2) (ULK) dielectrics to improve the interconnect speed of ultra-large scale integrated devices

  6. 9 Ultra Low Temperature ADI 2 9.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

    E-Print Network [OSTI]

    Cambridge, University of

    Contents 9 Ultra Low Temperature ADI 2 9.1 Introduction;Chapter 9 Ultra Low Temperature ADI 9.1 Introduction It has been indicated that a family of austempered]. These steels contain high carbon silicon and manganese, and they are isothermally heat treated at very low

  7. Low Carbon Footprint and Ultra Low NOx Boilers through Efficiency Gain 

    E-Print Network [OSTI]

    Benz, R,; Staedter, M.

    2008-01-01T23:59:59.000Z

    Low Carbon Footprint and Ultra Low NOx Boilers through Efficiency Gain Robert Benz Marcel Staedter... Industrial Energy Technology Conference, New Orleans, LA, May 6-9, 2008. M. Staedter, R. Benz / Low Carbon, Ultra Low NOx through Efficiency Gain where y denotes the mole fraction of excess...

  8. Technical Reports Ultra-low Dose Lung CT Perfusion Regularized by

    E-Print Network [OSTI]

    Virginia Tech

    Technical Reports Ultra-low Dose Lung CT Perfusion Regularized by a Previous Scan1 Hengyong Yu, Ph­regularized reconstruction (PSRR) method was proposed to reduce radiation dose and applied to lung perfusion studies. Normal and ultra-low-dose lung computed tomographic perfusion studies were compared in terms of the estimation

  9. Ultra-low rare earth element content in accreted ice from sub-glacial Lake Vostok, Antarctica

    E-Print Network [OSTI]

    Howat, Ian M.

    Ultra-low rare earth element content in accreted ice from sub-glacial Lake Vostok, Antarctica Paolo. We suggest that such ultra-low concentrations are unlikely to be representative of the real REE

  10. Active and Passive Elec. Comp., September 2003, Vol. 26, pp. 151166 ULTRA-LOW TEMPERATURE COEFFICIENT OF

    E-Print Network [OSTI]

    Azad, Abdul-Majeed

    Active and Passive Elec. Comp., September 2003, Vol. 26, pp. 151­166 ULTRA-LOW TEMPERATURE that this material system possessed low dielectric constant and ultra-low temperature coefficient of capacitance (TCC

  11. Life-Cycle Energy Demand of Computational Logic: From High-Performance 32nm CPU to Ultra-Low-Power 130nm MCU

    E-Print Network [OSTI]

    Bol, David; Boyd, Sarah; Dornfeld, David

    2011-01-01T23:59:59.000Z

    Performance 32 nm CPU to Ultra-Low-Power 130 nm MCU Davidboxes and smart phones to ultra-low-power 130 nm MCUs forthe energy demand for ultra-low-power MCUs is completely

  12. Analgesia, enhancement of spinal morphine antinociception, and inhibition of tolerance by ultra-low dose of the ?2A-adrenoceptor selective antagonist BRL44408

    E-Print Network [OSTI]

    2014-01-01T23:59:59.000Z

    Shen, K.F. , 1995. Ultra-low concentrations of naloxoneCahill, C.M. , 2010. Ultra-low dose naltrexone attenuatesand hyperalgesia by an ultra-low dose of the alpha-2-

  13. Life-Cycle Energy Demand of Computational Logic: From High-Performance 32nm CPU to Ultra-Low-Power 130nm MCU

    E-Print Network [OSTI]

    Bol, David; Boyd, Sarah; Dornfeld, David

    2011-01-01T23:59:59.000Z

    Performance 32 nm CPU to Ultra-Low-Power 130 nm MCU Davidboxes and smart phones to ultra-low-power 130 nm MCUs forthe energy demand for ultra-low-power MCUs is completely

  14. A Novel Si-Tunnel FET based SRAM Design for Ultra Low-Power 0.3V VDD Applications

    E-Print Network [OSTI]

    Yener, Aylin

    A Novel Si-Tunnel FET based SRAM Design for Ultra Low-Power 0.3V VDD Applications J. Singh, K-Band Tunnel Field Effect Transistors (TFETs) in SRAMs at ultra low supply voltages. The uni design using Si- TFETs for reliable operation with low leakage at ultra low voltages. We also demonstrate

  15. Characterization of oxygen and nitrogen rapid thermal annealing processes for ultra-low-k SiCOH films

    E-Print Network [OSTI]

    Boo, Jin-Hyo

    Characterization of oxygen and nitrogen rapid thermal annealing processes for ultra-low-k Si is suggested and characterized in this work for improvement of SiCOH ultra-low-k (k 2.4) film properties. Low is decreased, and the ultra-low-k films (k

  16. Chair for Computer Networks and Internet -Universitt Tbingen 1 ffor an open source, ultra low delay audio coding

    E-Print Network [OSTI]

    Carle, Georg

    an open source, ultra low delay audio coding Extending the packet loss concealment algorithm ITU G 711 A di 1 t f ll b d idthITU G.711 Appendix 1 to full bandwidth Comparing ultra low delay audio codecs SSummary Chair for Computer Networks and Internet - Universität Tübingen 2 #12;From speech to ultra-low

  17. MAC Design for Supporting Ultra Low Duty Cycle in Wireless Sensor Networks1 *Wooguil PakO

    E-Print Network [OSTI]

    Bahk, Saewoong

    MAC Design for Supporting Ultra Low Duty Cycle in Wireless Sensor Networks1 *Wooguil PakO , *Hyuk.1%). Our proposed U-MAC (Ultra low duty cycle MAC) protocol targets achieving low energy consumption under. In this paper, we propose a new MAC algorithm called U-MAC (Ultra low duty cycle MAC) that works effectively

  18. Trading off Reliability and Power-Consumption in Ultra-Low Power Systems Atul Maheshwari, Wayne Burleson and Russell Tessier

    E-Print Network [OSTI]

    Tessier, Russell

    Trading off Reliability and Power-Consumption in Ultra-Low Power Systems Atul Maheshwari, Wayne but also for ultra-low power consumption due to limited battery life. This paper explores architecture (Binary and Gray) we show that temporal re- dundancy is best suited for these ultra-low power and low

  19. Modeling the ratios of SKKS and SKS amplitudes with ultra-low velocity zones at the core-mantle boundary

    E-Print Network [OSTI]

    Ritsema, Jeroen

    Modeling the ratios of SKKS and SKS amplitudes with ultra-low velocity zones at the core of earthquakes in Indonesia. Modeling of SKKS/SKS indicate that Ultra-Low Velocity Zones (ULVZs), layers, and M. S. Thorne (2009), Modeling the ratios of SKKS and SKS amplitudes with ultra-low velocity zones

  20. Centralized route recovery based on multi-hop wakeup time estimation for wireless sensor networks with ultra low duty cycles

    E-Print Network [OSTI]

    Bahk, Saewoong

    with ultra low duty cycles Wooguil Pak, Saewoong Bahk Department of EECS & INMC, Seoul National University Keywords: Wireless sensor network Routing protocol Ultra low duty cycle Network lifetime Multi-hop wakeup time estimation to maximize the network lifetime of WSNs under ultra low duty cycles. It does not use

  1. Seismic structure and ultra-low velocity zones at the base of the Earth's mantle beneath Southeast Asia

    E-Print Network [OSTI]

    Wen, Lianxing

    Seismic structure and ultra-low velocity zones at the base of the Earth's mantle beneath Southeast t We constrain seismic structure and ultra-low velocity zones near the Earth's core-mantle boundary that the strong scatterers represent ultra-low velocity zones (ULVZs). We suggest that the seismic structure

  2. Ultra low resistance, non-alloyed ohmic contacts to n-InGaAs Ashish K. Baraskar1

    E-Print Network [OSTI]

    Rodwell, Mark J. W.

    Ultra low resistance, non-alloyed ohmic contacts to n-InGaAs Ashish K. Baraskar1 , Mark A. Wistey1 and fmax [1], [2]. Here we report the ultra-low specific contact resistivity (c) of non-alloyed in duration. These data indicate that the in-situ Mo gives ultra low Ohmic contacts, probably due

  3. Ultra-low field nuclear magnetic resonance and magnetic resonance imaging to discriminate and identify materials

    DOE Patents [OSTI]

    Kraus, Robert H. (Los Alamos, NM); Matlashov, Andrei N. (Los Alamos, NM); Espy, Michelle A. (Los Alamos, NM); Volegov, Petr L. (Los Alamos, NM)

    2010-03-30T23:59:59.000Z

    An ultra-low magnetic field NMR system can non-invasively examine containers. Database matching techniques can then identify hazardous materials within the containers. Ultra-low field NMR systems are ideal for this purpose because they do not require large powerful magnets and because they can examine materials enclosed in conductive shells such as lead shells. The NMR examination technique can be combined with ultra-low field NMR imaging, where an NMR image is obtained and analyzed to identify target volumes. Spatial sensitivity encoding can also be used to identify target volumes. After the target volumes are identified the NMR measurement technique can be used to identify their contents.

  4. Well Performance Analysis for Low to Ultra-low Permeability Reservoir Systems 

    E-Print Network [OSTI]

    Ilk, Dilhan

    2010-10-12T23:59:59.000Z

    to evaluate well performance in unconventional (i.e., low to ultra-low permeability) reservoir systems. The specific tasks achieved in this work include the following: ? Integrated Diagnostics and Analysis of Production Data in Unconventional Reservoirs: We...

  5. Cost-benefit analysis of ultra-low sulfur jet fuel

    E-Print Network [OSTI]

    Kuhn, Stephen (Stephen Richard)

    2010-01-01T23:59:59.000Z

    The growth of aviation has spurred increased study of its environmental impacts and the possible mitigation thereof. One emissions reduction option is the introduction of an Ultra Low Sulfur (ULS) jet fuel standard for ...

  6. PEM fuel cellstack development based on membrane-electrode assemblies of ultra-low platinum loadings

    SciTech Connect (OSTI)

    Zawodzinski, C.; Wilson, M.S.; Gottesfeld, S.

    1995-09-01T23:59:59.000Z

    Attempt is made to scale-up single cell technology, based on ultra-low platinum loadings, to develop a polymer electrolyte membrane fuel cell stack for stationary power generation.

  7. Vehicle Technologies Office Merit Review 2014: Thermally Stable Ultra-Low Temperature Oxidation Catalysts

    Broader source: Energy.gov [DOE]

    Presentation given by [company name] at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about thermally stable ultra-low...

  8. The catalytic oxidation of propane 

    E-Print Network [OSTI]

    Sanderson, Charles Frederick

    1949-01-01T23:59:59.000Z

    THE CATALYTIC OXIDATION OP PROPANE A Thesis By Charles Frederick Sandersont * * June 1949 Approval as to style and content recommended: Head of the Department of Chemical Engineering THE CATALYTICi OXIDATTON OF PROPANE A Thesis By Charles... Frederick ;Sandersonit * June 1949 THE CATALYTIC OXIDATION OP PROPANE A Thesis Submitted to the Faculty of the Agricultural and Mechanical College of Texas in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Major...

  9. The catalytic oxidation of propane

    E-Print Network [OSTI]

    Sanderson, Charles Frederick

    1949-01-01T23:59:59.000Z

    THE CATALYTIC OXIDATION OP PROPANE A Thesis By Charles Frederick Sandersont * * June 1949 Approval as to style and content recommended: Head of the Department of Chemical Engineering THE CATALYTICi OXIDATTON OF PROPANE A Thesis By Charles... Frederick ;Sandersonit * June 1949 THE CATALYTIC OXIDATION OP PROPANE A Thesis Submitted to the Faculty of the Agricultural and Mechanical College of Texas in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Major...

  10. Chemical reactions studied at ultra-low temperature in liquid helium clusters

    SciTech Connect (OSTI)

    Huisken, Friedrich; Krasnokutski, Serge A. [Laboratory Astrophysics Group of the Max Planck Institute for Astronomy at the University of Jena, Institute of Solid State Physics, Helmholtzweg 3, D-07743 Jena (Germany)

    2012-11-27T23:59:59.000Z

    Low-temperature reaction rates are important ingredients for astrophysical reaction networks modeling the formation of interstellar matter in molecular clouds. Unfortunately, such data is difficult to obtain by experimental means. In an attempt to study low-temperature reactions of astrophysical interest, we have investigated relevant reactions at ultralow temperature in liquid helium droplets. Being prepared by supersonic expansion of helium gas at high pressure through a nozzle into a vacuum, large helium clusters in the form of liquid droplets constitute nano-sized reaction vessels for the study of chemical reactions at ultra-low temperature. If the normal isotope {sup 4}He is used, the helium droplets are superfluid and characterized by a constant temperature of 0.37 K. Here we present results obtained for Mg, Al, and Si reacting with O{sub 2}. Mass spectrometry was employed to characterize the reaction products. As it may be difficult to distinguish between reactions occurring in the helium droplets before they are ionized and ion-molecule reactions taking place after the ionization, additional techniques were applied to ensure that the reactions actually occurred in the helium droplets. This information was provided by measuring the chemiluminescence light emitted by the products, the evaporation of helium atoms by the release of the reaction heat, or by laser-spectroscopic identification of the reactants and products.

  11. Clean Fuel Advanced Technology Public Education Campaign: Billboards According to the U.S. Department of Energy's July 2013 alternative fuel price report, the price of propane

    E-Print Network [OSTI]

    .S. Department of Energy's July 2013 alternative fuel price report, the price of propane (LPG) in North Carolina at least $1,000 in yearly fuel costs by driving on natural gas or propane. · According to the U

  12. Residential propane price increases

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade Year-0E (2001) -heating oil pricepropane price05, 2014propane

  13. Residential propane prices available

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade Year-0E (2001) -heating oil pricepropane price05,propane prices

  14. Residential propane prices decreases

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade Year-0E (2001) -heating oil pricepropane price05,propane prices5, 2014

  15. Residential propane prices increase

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade Year-0E (2001) -heating oil pricepropane price05,propane prices5,

  16. Residential propane prices increase

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade Year-0E (2001) -heating oil pricepropane price05,propane

  17. 2013 Propane Market Outlook

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del(ANL-IN-03-032) -Less isNFebruary 2004AugustApril 20133 Audit2013 NUFOPlasma Propane

  18. CRYOGENIC 1.5-4.5 GHz ULTRA LOW NOISE AMPLIFIER Niklas Wadefalk*, Anders Mellberg, Iltcho Angelov, Emmanuil Choumas**, Erik Kollberg,

    E-Print Network [OSTI]

    CRYOGENIC 1.5-4.5 GHz ULTRA LOW NOISE AMPLIFIER Niklas Wadefalk*, Anders Mellberg, Iltcho Angelov amplifiers with ultra-low noise and very low DC power dissipation. Amplifiers with ultra- low noise and low.5-4.5 GHz ULTRA LOW NOISE AMPLIFIER Niklas Wadefalk, Anders Mellberg, Iltcho Angelov, Emmanuil Choumas, Erik

  19. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 51, NO. 6, JUNE 2003 1705 Cryogenic Wide-Band Ultra-Low-Noise IF

    E-Print Network [OSTI]

    -Band Ultra-Low-Noise IF Amplifiers Operating at Ultra-Low DC Power Niklas Wadefalk, Anders Mellberg, Iltcho Identifier 10.1109/TMTT.2003.812570 ultra-low-noise and ultra-low dc power dissipation are of interest--This paper describes cryogenic broad-band ampli- fiers with very low power consumption and very low noise

  20. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--II: EXPRESS BRIEFS, VOL. 59, NO. 4, APRIL 2012 193 Universal Principles for Ultra Low Power

    E-Print Network [OSTI]

    Sarpeshkar, Rahul

    Universal Principles for Ultra Low Power and Energy Efficient Design Rahul Sarpeshkar, Senior Member, IEEE

  1. Stable, Ultra-Low Residence Time Partial Oxidation

    DOE Patents [OSTI]

    Schmidt, Lanny D. (Minneapolis, MN); Hickman, Daniel A. (Midland, MI)

    1997-07-15T23:59:59.000Z

    A process for the catalytic partial oxidation of methane in gas phase at very short residence time (800,000 to 12,000,000 hr.sup.-1) by contacting a gas stream containing methane and oxygen with a metal supported catalyst, such as platinum deposited on a ceramic monolith.

  2. Ultra-low power, Zeno effect based optical modulation in a degenerate V-system with a

    E-Print Network [OSTI]

    Shahriar, Selim

    Ultra-low power, Zeno effect based optical modulation in a degenerate V-system with a tapered nano@northwestern.edu Abstract: We demonstrate an ultra-low light level optical modulator using a tapered nano fiber embedded. For a control power of 40 nW and a signal power of 100 pW, we observe near 100% modulation. The ultra-low power

  3. Titan's Prolific Propane: The Cassini CIRS Perspective

    E-Print Network [OSTI]

    Nixon, C A; Flaud, J -M; Bezard, B; Teanby, N A; Irwin, P G J; Ansty, T M; Coustenis, A; Vinatier, S; Flasar, F M; 10.1016/j.pss.2009.06.021

    2009-01-01T23:59:59.000Z

    In this paper we select large spectral averages of data from the Cassini Composite Infrared Spectrometer (CIRS) obtained in limb-viewing mode at low latitudes (30S--30N), greatly increasing the path length and hence signal-to-noise ratio for optically thin trace species such as propane. By modeling and subtracting the emissions of other gas species, we demonstrate that at least six infrared bands of propane are detected by CIRS, including two not previously identified in Titan spectra. Using a new line list for the range 1300-1400cm -1, along with an existing GEISA list, we retrieve propane abundances from two bands at 748 and 1376 cm-1. At 748 cm-1 we retrieve 4.2 +/- 0.5 x 10(-7) (1-sigma error) at 2 mbar, in good agreement with previous studies, although lack of hotbands in the present spectral atlas remains a problem. We also determine 5.7 +/- 0.8 x 10(-7) at 2 mbar from the 1376 cm-1 band - a value that is probably affected by systematic errors including continuum gradients due to haze and also an imperf...

  4. Natural Gas Ethanol Flex-Fuel

    E-Print Network [OSTI]

    Natural Gas Propane Electric Ethanol Flex-Fuel Biodiesel Vehicle Buyer's Guide Clean Cities 2012 . . . . . . . . . . . . . . . . . . . . . . . . 4 About This Guide . . . . . . . . . . . . . . . . . . . 5 Compressed Natural Gas and emissions. Alternative fueling infrastructure is expanding in many regions, making natural gas, propane

  5. Method of produce ultra-low friction carbon films

    DOE Patents [OSTI]

    Erdemir, Ali (Naperville, IL); Fenske, George R. (Downers Grove, IL); Eryilmaz, Osman Levent (Istanbul, TK); Lee, Richard H. (Lemont, IL)

    2003-04-15T23:59:59.000Z

    A method and article of manufacture of amorphous diamond-like carbon. The method involves providing a substrate in a chamber, providing a mixture of a carbon containing gas and hydrogen gas with the mixture adjusted such that the atomic molar ratio of carbon to hydrogen is less than 0.3, including all carbon atoms and all hydrogen atoms in the mixture. A plasma is formed of the mixture and the amorphous diamond-like carbon film is deposited on the substrate. To achieve optimum bonding an intervening bonding layer, such as Si or SiO.sub.2, can be formed from SiH.sub.4 with or without oxidation of the layer formed.

  6. Ethane enrichment and propane depletion in subsurface gases indicate gas hydrate occurrence in marine sediments at southern Hydrate Ridge offshore Oregon

    SciTech Connect (OSTI)

    Milkov, Alexei V.; Claypool, G E.; Lee, Young-Joo; Torres, Marta E.; Borowski, W S.; Tomaru, H; Sassen, Roger; Long, Philip E.

    2004-07-02T23:59:59.000Z

    The recognition of finely disseminated gas hydrate in deep marine sediments heavily depends on various indirect techniques because this mineral quickly decomposes upon recovery from in situ pressure and temperature conditions. Here, we discuss molecular properties of closely spaced gas voids (formed as a result of core recovery) and gas hydrates from an area of relatively low gas flux at the flanks of the southern Hydrate Ridge Offshore Oregon (ODP Sites 1244, 1245 and 1247).

  7. High Performance Plasma Sputtered Fuel Cell Electrodes with Ultra Low catalytic metal Loadings

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    to be reached between 2010 and 2015 are clear: the catalyst of a fuel cell can cost no more than 4 per kilowatt1 High Performance Plasma Sputtered Fuel Cell Electrodes with Ultra Low catalytic metal Loadings C in plasma fuel cell deposition devices. Pt loadings lower than 0.01 mg cm-2 have been realized. The Pt

  8. High Performance Plasma Sputtered PdPt Fuel Cell Electrodes with Ultra Low Loading

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    : the catalyst of a fuel cell can cost no more than 5/3 per kilowatt [1]. If the catalyst is platinum (~40 g-1High Performance Plasma Sputtered PdPt Fuel Cell Electrodes with Ultra Low Loading M. Mougenot1, 2 potential for the fuel cell technology to overcome the upcoming energy and resources issues in our society

  9. Delayed Linear Expansion of Two Ultra-low Expansion Dental Stones 

    E-Print Network [OSTI]

    Oppedisano, Michael

    2013-12-20T23:59:59.000Z

    The purpose of this study was to measure the linear setting expansion of two ultra-low expansion dental stones used in definitive cast/ prosthesis fabrication which claim to have very low to no setting expansion. Five specimens of each material...

  10. High rate, long-distance quantum key distribution over 250km of ultra low loss fibres

    E-Print Network [OSTI]

    D. Stucki; N. Walenta; F. Vannel; R. T. Thew; N. Gisin; H. Zbinden; S. Gray; C. R. Towery; S. Ten

    2009-03-23T23:59:59.000Z

    We present a fully automated quantum key distribution prototype running at 625 MHz clock rate. Taking advantage of ultra low loss fibres and low-noise superconducting detectors, we can distribute 6,000 secret bits per second over 100 km and 15 bits per second over 250km.

  11. Delayed Linear Expansion of Two Ultra-low Expansion Dental Stones

    E-Print Network [OSTI]

    Oppedisano, Michael

    2013-12-20T23:59:59.000Z

    The purpose of this study was to measure the linear setting expansion of two ultra-low expansion dental stones used in definitive cast/ prosthesis fabrication which claim to have very low to no setting expansion. Five specimens of each material...

  12. Ultra-low repetition rate mode-locked fiber laser with high-energy pulses

    E-Print Network [OSTI]

    Kobtsev, Sergei M.

    to ultra-short record high-energy pulses out of laser oscillators," Phys. Lett. A 372, 3124­3128 (2008). 5Ultra-low repetition rate mode-locked fiber laser with high-energy pulses Sergey Kobtsev* , Sergey Kukarin, Yurii Fedotov Laser Systems Laboratory, Novosibirsk State University,Pirigova 2, Novosibirsk

  13. Ultra-Low Voltage VCO Design Using Schmitt Trigger on SOI

    E-Print Network [OSTI]

    Ayers, Joseph

    , and self-heating effect. In order to reduce this disadvantage, several techniques for body-contact haveUltra-Low Voltage VCO Design Using Schmitt Trigger on SOI Kyung Ki Kim Department of Electrical of Electrical and Computer Engineering Northeastern University Boston, U.S.A ybk@ece.neu.edu Young Jun Lee Next

  14. Development of Ultra-low Platinum Alloy C th d C t l t f PEM F l C ll

    E-Print Network [OSTI]

    Development of Ultra-low Platinum Alloy C th d C t l t f PEM F l C ll Cathode Catalyst for PEM Objectives · Ultra-low loading Pt catalyysts for oxygen reduction reaction with higgh activityyand ggoodg yg Definition ­ In Developing Low Loading Platinum Catalysts · C l PCatalyst Perfformance ¾ Platinum

  15. EVALUATION OF EFFICACY AND HUMAN HEALTH RISK OF AERIAL ULTRA-LOW VOLUME APPLICATIONS OF PYRETHRINS AND

    E-Print Network [OSTI]

    Peterson, Robert K. D.

    EVALUATION OF EFFICACY AND HUMAN HEALTH RISK OF AERIAL ULTRA-LOW VOLUME APPLICATIONS OF PYRETHRINS). A human health risk assessment conducted by Peterson et al. (2006) for truck-mounted ultra-low volume (ULV to epidemic levels and dispersed to all 58 counties in the state, and was associated with low

  16. A 65nm CMOS Ultra Low Power and Low Noise 131M Front-End Transimpedance Amplifier

    E-Print Network [OSTI]

    Ayers, Joseph

    A 65nm CMOS Ultra Low Power and Low Noise 131M Front-End Transimpedance Amplifier Jiaping Hu and simulation of a high-transimpedance gain, ultra low-power dissipation and low-noise CMOS front- end control [3]. However, it introduces design challenges in the form of trade-offs between noise, power

  17. Catalytic Combustion for Ultra-Low NOx Hydrogen Turbines

    SciTech Connect (OSTI)

    Etemad, Shahrokh; Baird, Benjamin; Alavandi, Sandeep

    2011-06-30T23:59:59.000Z

    Precision Combustion, Inc., (PCI) in close collaboration with Solar Turbines, Incorporated, has developed and demonstrated a combustion system for hydrogen fueled turbines that reduces NOx to low single digit level while maintaining or improving current levels of efficiency and eliminating emissions of carbon dioxide. Full scale Rich Catalytic Hydrogen (RCH1) injector was developed and successfully tested at Solar Turbines, Incorporated high pressure test facility demonstrating low single digit NOx emissions for hydrogen fuel in the range of 2200F-2750F. This development work was based on initial subscale development for faster turnaround and reduced cost. Subscale testing provided promising results for 42% and 52% H2 with NOx emissions of less than 2 ppm with improved flame stability. In addition, catalytic reactor element testing for substrate oxidation, thermal cyclic injector testing to simulate start-stop operation in a gas turbine environment, and steady state 15 atm. operation testing were performed successfully. The testing demonstrated stable and robust catalytic element component life for gas turbine conditions. The benefit of the catalytic hydrogen combustor technology includes capability of delivering near-zero NOx without costly post-combustion controls and without requirement for added sulfur control. In addition, reduced acoustics increase gas turbine component life. These advantages advances Department of Energy (DOE’s) objectives for achievement of low single digit NOx emissions, improvement in efficiency vs. postcombustion controls, fuel flexibility, a significant net reduction in Integrated Gasification Combined Cycle (IGCC) system net capital and operating costs, and a route to commercialization across the power generation field from micro turbines to industrial and utility turbines.

  18. Liquid Propane Injection Technology Conductive to Today's North...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Technology Conductive to Today's North American Specification Liquid Propane Injection Technology Conductive to Today's North American Specification Liquid propane injection...

  19. Propane - A Mid-Heating Season Assessment

    Reports and Publications (EIA)

    2001-01-01T23:59:59.000Z

    This report will analyze some of the factors leading up to the rapid increase in propane demand and subsequent deterioration in supply that propelled propane prices to record high levels during December and early January.

  20. Costs Associated With Propane Vehicle Fueling Infrastructure

    SciTech Connect (OSTI)

    Smith, M.; Gonzales, J.

    2014-08-01T23:59:59.000Z

    This document is designed to help fleets understand the cost factors associated with propane vehicle fueling infrastructure. It provides an overview of the equipment and processes necessary to develop a propane fueling station and offers estimated cost ranges.

  1. Multi-Gate Modulation Doped In0.7Ga0.3As Quantum Well FET for Ultra Low Power Digital Logic

    E-Print Network [OSTI]

    Yener, Aylin

    Multi-Gate Modulation Doped In0.7Ga0.3As Quantum Well FET for Ultra Low Power Digital Logic L. LiuQFET is promising device architecture for future ultra low power information processing applications. Introduction for reconfigurable and ultra-low-power binary decision diagram (BDD) logic ECS Transactions, 35 (3) 311-317 (2011) 10

  2. A Baseband Ultra-Low Noise SiGe:C BiCMOS 0.25 m Amplifier And Its Application For

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A Baseband Ultra-Low Noise SiGe:C BiCMOS 0.25 µm Amplifier And Its Application For An On-Chip Phase of an ultra-low noise operational amplifier is presented. Its applications are integrated low-frequency noise and ultra low input noise to achieve the required signal to noise ratio. In these instrumentation

  3. 1, 2341, 2001 OH + propane and

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ACPD 1, 23­41, 2001 OH + propane and iodopropanes S. A. Carl and J. N. Crowley Title Page Abstract + propane and iodopropanes S. A. Carl and J. N. Crowley Title Page Abstract Introduction Conclusions #12;ACPD 1, 23­41, 2001 OH + propane and iodopropanes S. A. Carl and J. N. Crowley Title Page Abstract

  4. Ultra low-mass star and substellar formation in sigma Orionis

    E-Print Network [OSTI]

    J. A. Caballero

    2005-11-07T23:59:59.000Z

    The nearby young sigma Orionis cluster (~360 pc, ~3 Ma) is becoming one of the most important regions for the study of ultra low-mass star formation and its extension down to the mass regimes of the brown dwarfs and planetary-mass objects. Here, I introduce the sigma Orionis cluster and present three studies that the JOVIAN group is developing: a pilot programme of near-infrared adaptive-optics imaging, intermediate-resolution optical spectroscopy of a large sample of stars of the cluster and a study of the mass function down to the planetary-mass domain. This paper is a summary of the content of four posters that I presented in the Ultra low-mass star formation and evolution Workshop, as single author or on behalf of different collaborations.

  5. Diffuse Surface Scattering in the Plasmonic Resonances of Ultra-Low Electron Density Nanospheres

    E-Print Network [OSTI]

    Monreal, R Carmina; Apell, S Peter

    2015-01-01T23:59:59.000Z

    Localized surface plasmon resonances (LSPRs) have recently been identified in extremely diluted electron systems obtained by doping semiconductor quantum dots. Here we investigate the role that different surface effects, namely electronic spill-out and diffuse surface scattering, play in the optical properties of these ultra-low electron density nanosystems. Diffuse scattering originates from imperfections or roughness at a microscopic scale on the surface. Using an electromagnetic theory that describes this mechanism in conjunction with a dielectric function including the quantum size effect, we find that the LSPRs show an oscillatory behavior both in position and width for large particles and a strong blueshift in energy and an increased width for smaller radii, consistent with recent experimental results for photodoped ZnO nanocrystals. We thus show that the commonly ignored process of diffuse surface scattering is a more important mechanism affecting the plasmonic properties of ultra-low electron density ...

  6. Integrated production/use of ultra low-ash coal, premium liquids and clean char

    SciTech Connect (OSTI)

    Kruse, C.W.

    1991-01-01T23:59:59.000Z

    This integrated, multi-product approach for utilizing Illinois coal starts with the production of ultra low-ash coal and then converts it to high-vale, coal-derived, products. The ultra low-ash coal is produced by solubilizing coal in a phenolic solvent under ChemCoal{trademark} process conditions, separating the coal solution from insoluble ash, and then precipitating the clean coal by dilution of the solvent with methanol. Two major products, liquids and low-ash char, are then produced by mild gasification of the low-ash coal. The low ash-char is further upgraded to activated char, and/or an oxidized activated char which has catalytic properties. Characterization of products at each stage is part of this project.

  7. Ultra-low phase noise all-optical microwave generation setup based on commercial devices

    E-Print Network [OSTI]

    Didier, A; Grop, S; Dubois, B; Bigler, E; Rubiola, E; Lacroûte, C; Kersalé, Y

    2015-01-01T23:59:59.000Z

    In this paper, we present a very simple design based on commercial devices for the all-optical generation of ultra-low phase noise microwave signals. A commercial, fibered femtosecond laser is locked to a laser that is stabilized to a commercial ULE Fabry-Perot cavity. The 10 GHz microwave signal extracted from the femtosecond laser output exhibits a single sideband phase noise $\\mathcal{L}(f)=-104 \\ \\mathrm{dBc}/\\mathrm{Hz}$ at 1 Hz Fourier frequency, at the level of the best value obtained with such "microwave photonics" laboratory experiments \\cite{Fortier2011}. Close-to-the-carrier ultra-low phase noise microwave signals will now be available in laboratories outside the frequency metrology field, opening up new possibilities in various domains.

  8. Impact of picolitre droplets on superhydrophobic surfaces with ultra-low spreading ratios

    E-Print Network [OSTI]

    Brown, P.S.; Berson, A.; Talbot, E.L.; Wood, T.J.; Schofield, W.C.E.; Bain, C.D.; Badyal, J.P.S.

    2011-01-01T23:59:59.000Z

    :24 1 IMPACT OF PICOLITRE DROPLETS ON SUPERHYDROPHOBIC SURFACES WITH ULTRA-LOW SPREADING RATIOS P. S. Brown, A. Berson, E. L. Talbot, T. J. Wood, W. C. E. Schofield, C. D. Bain†, and J. P. S. Badyal†* Department of Chemistry Science... the dynamics of wetting to be precisely controlled. Final spreading ratios as low as 0.63 can be achieved. Comparison of the maximum spreading ratio and droplet oscillation frequencies with models described in the literature shows that both are found...

  9. CASCADES: An Ultra-Low-Background Germanium Crystal Array at Pacific Northwest National Laboratory

    SciTech Connect (OSTI)

    Keillor, M. E.; Aalseth, C. E.; Day, A. R.; Erikson, L. E.; Fast, J. E.; Glasgow, B. D.; Hoppe, E. W.; Hossbach, T. W.; Hyronimus, B. J.; Miley, H. S.; Myers, A. W.; Seifert, A.; Stavenger, T. J. [Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352 (United States)

    2011-12-13T23:59:59.000Z

    State-of-the-art treaty verification techniques, environmental surveillance, and physics experiments require increased sensitivity for detecting and quantifying radionuclides of interest. This can be accomplished with new detector designs that establish high detection efficiency and reduced instrument backgrounds. Current research is producing an intrinsic germanium (HPGe) array designed for high detection efficiency, ultra-low-background performance, and sensitive {gamma}--{gamma} coincidence detection. The system design is optimized to accommodate filter paper samples, e.g. samples collected by the Radionuclide Aerosol Sampler/Analyzer. The system will provide high sensitivity for weak collections on atmospheric filter samples (e.g.<10{sup 5} fissions) as well as offering the potential to gather additional information from higher activity filters using gamma cascade coincidence detection. The first of two HPGe crystal arrays in ultra-low-background vacuum cryostats has been assembled, with the second in progress. Traditional methods for constructing ultra-low-background detectors were followed, including use of materials known to be low in radioactive contaminants, use of ultra-pure reagents, and clean room assembly. The cryostat is constructed mainly from copper electroformed into near-final geometry at Pacific Northwest National Laboratory. Details of the detector assembly and initial background and spectroscopic measurement results are presented; also a description of the custom analysis package used by this project is given.

  10. CASCADES: An Ultra-Low-Background Germanium Crystal Array at Pacific Northwest National Laboratory

    SciTech Connect (OSTI)

    Keillor, Martin E.; Aalseth, Craig E.; Day, Anthony R.; Erikson, Luke E.; Fast, James E.; Glasgow, Brian D.; Hoppe, Eric W.; Hossbach, Todd W.; Hyronimus, Brian J.; Miley, Harry S.; Myers, Allan W.; Seifert, Allen; Stavenger, Timothy J.

    2011-07-14T23:59:59.000Z

    State-of-the-art treaty verification techniques, environmental surveillance, and physics experiments require increased sensitivity for detecting and quantifying radionuclides of interest. This can be accomplished with new detector designs that establish high detection efficiency and reduced instrument backgrounds. Current research is producing an intrinsic germanium (HPGe) array designed for high detection efficiency, ultra-low-background performance, and sensitive {gamma}-{gamma} coincidence detection. The system design is optimized to accommodate filter paper samples, e.g., samples collected by the Radionuclide Aerosol Sampler/Analyzer. The system will provide high sensitivity for weak collections on atmospheric filter samples (e.g., < 10{sup 5} fissions), as well as offering the potential to gather additional information from higher activity filters using gamma cascade coincidence detection. The first of two HPGe crystal arrays in ultra-low-background vacuum cryostats has been assembled, with the second in progress. Traditional methods for constructing ultra-low-background detectors were followed, including use of materials known to be low in radioactive contaminants, use of ultra-pure reagents, and clean room assembly. The cryostat is constructed mainly from copper electroformed into near-final geometry at Pacific Northwest National Laboratory. Details of the detector assembly and initial background and spectroscopic measurement results are presented; also a description of the custom analysis package used by this project is given.

  11. Measurement of Untruncated Nuclear Spin Interactions via Zero- to Ultra-Low-Field Nuclear Magnetic Resonance

    E-Print Network [OSTI]

    John W. Blanchard; Tobias F. Sjolander; Jonathan P. King; Micah P. Ledbetter; Emma H. Levine; Vikram S. Bajaj; Dmitry Budker; Alexander Pines

    2015-07-09T23:59:59.000Z

    Zero- to ultra-low-field nuclear magnetic resonance (ZULF NMR) provides a new regime for the measurement of nuclear spin-spin interactions free from effects of large magnetic fields, such as truncation of terms that do not commute with the Zeeman Hamiltonian. One such interaction, the magnetic dipole-dipole coupling, is a valuable source of spatial information in NMR, though many terms are unobservable in high-field NMR, and the coupling averages to zero under isotropic molecular tumbling. Under partial alignment, this information is retained in the form of so-called residual dipolar couplings. We report zero- to ultra-low-field NMR measurements of residual dipolar couplings in acetonitrile-2-$^{13}$C aligned in stretched polyvinyl acetate gels. This represents the first investigation of dipolar couplings as a perturbation on the indirect spin-spin $J$-coupling in the absence of an applied magnetic field. As a consequence of working at zero magnetic field, we observe terms of the dipole-dipole coupling Hamiltonian that are invisible in conventional high-field NMR. This technique expands the capabilities of zero- to ultra-low-field NMR and may have applications in precision measurement of subtle physical interactions, chemical analysis, and characterization of local mesoscale structure in materials.

  12. Etude cin\\'etique de CVD de pyrocarbone obtenu par pyrolyse de propane

    E-Print Network [OSTI]

    Ziegler-Devin, Isabelle; Marquaire, Paul-Marie

    2009-01-01T23:59:59.000Z

    High temeperature (900-1000\\degree C) low pressure (propane yields a pyrocarbon deposit, but also mainly hydrogen and hydrocarbons from methane to polyaromatics. 30 reaction products were exeperimentally quantified at different operating conditions. A detailed kinetic pyrolysis model (600 reactions) has been developed and validated based on the totality of experiments. This model includes a homogeneous model (describing the gas phase pyrolysis of propane) coupled with a heterogeneous model describing the pyrocarbon deposit.

  13. Propane Market Model documentation report

    SciTech Connect (OSTI)

    Not Available

    1993-12-01T23:59:59.000Z

    The purpose of this report is to define the objectives of the Propane Market Model (PMM), describe its basic approach, and to provide details on model functions. This report is intended as a reference document for model analysts, users, and the general public. Documentation of the model is in accordance with EIA`s legal obligation to provide adequate documentation in support of its models. The PMM performs a short-term (6- to 9-months) forecast of demand and price for consumer-grad propane in the national US market; it also calculates the end-of-month stock level during the term of the forecast. Another part of the model allows for short-term demand forecasts for certain individual Petroleum Administration for Defense (PAD) districts. The model is used to analyze market behavior assumptions or shocks and to determine the effect on market price, demand, and stock level.

  14. Jump Chaotic Behaviour of Ultra Low Loss Bulk Acoustic Wave Cavities

    E-Print Network [OSTI]

    Maxim Goryachev; Warrick G. Farr; Serge Galliou; Michael E. Tobar

    2014-06-16T23:59:59.000Z

    We demonstrate a previously unobserved nonlinear phenomenon in an ultra-low loss quartz Bulk Acoustic Wave cavity ($Q>3\\times10^9$), which only occurs below 20 milli-Kelvin in temperature and under relatively weak pumping. The phenomenon reveals the emergence of several stable equilibria (at least two foci and two nodes) and jumps between these quasi states at random times. The degree of this randomness as well as separations between levels can be controlled by the frequency of the incident carrier signal. It is demonstrated that the nature of the effect lays beyond the standard Duffing model.

  15. Ultra-low field nuclear magnetic resonance and magnetic resonance imaging to discriminate and identify materials

    SciTech Connect (OSTI)

    Matlashov, Andrei Nikolaevich; Urbaitis, Algis V.; Savukov, Igor Mykhaylovich; Espy, Michelle A.; Volegov, Petr Lvovich; Kraus, Jr., Robert Henry

    2013-03-05T23:59:59.000Z

    Method comprising obtaining an NMR measurement from a sample wherein an ultra-low field NMR system probes the sample and produces the NMR measurement and wherein a sampling temperature, prepolarizing field, and measurement field are known; detecting the NMR measurement by means of inductive coils; analyzing the NMR measurement to obtain at least one measurement feature wherein the measurement feature comprises T1, T2, T1.rho., or the frequency dependence thereof; and, searching for the at least one measurement feature within a database comprising NMR reference data for at least one material to determine if the sample comprises a material of interest.

  16. High excitation power photoluminescence studies of ultra-low density GaAs quantum dots

    SciTech Connect (OSTI)

    Sonnenberg, D.; Graf, A.; Paulava, V.; Heyn, Ch.; Hansen, W. [Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstr. 11, 20355 Hamburg (Germany)

    2013-12-04T23:59:59.000Z

    We fabricate GaAs epitaxial quantum dots (QDs) by filling of self-organized nanoholes in AlGaAs. The QDs are fabricated under optimized process conditions and have ultra-low density in the 10{sup 6} cm{sup ?2} regime. At low excitation power the optical emission of single QDs exhibit sharp excitonic lines, which are attributed to the recombination of excitonic and biexcitonic states. High excitation power measurements reveal surprisingly broad emission lines from at least six QD shell states.

  17. Natural Theories of Ultra-Low Mass PNGB's: Axions and Quintessence

    E-Print Network [OSTI]

    Christopher T. Hill; Adam K. Leibovich

    2002-06-06T23:59:59.000Z

    We consider the Wilson Line PNGB which arises in a U(1)^N gauge theory, abstracted from a latticized, periodically compactified extra dimension U(1). Planck scale breaking of the PNGB's global symmetry is suppressed, providing natural candidates for the axion and quintessence. We construct an explicit model in which the axion may be viewed as the 5th component of the U(1)_Y gauge field in a 1+4 latticized periodically compactified extra dimension. We also construct a quintessence PNGB model where the ultra-low mass arises from Planck-scale suppressed physics itself.

  18. Specifications of the octupole magnets required for the ATF2 ultra-low ß* lattice

    SciTech Connect (OSTI)

    Marin, E.; /SLAC; Modena, M.; /CERN; Tauchi, T.; Terunuma, N.; /KEK, Tsukuba; Tomas, R.; /CERN; White, G.R.; /SLAC

    2014-05-28T23:59:59.000Z

    The Accelerator Test Facility 2 (ATF2) aims to test the novel chromaticity correction for higher chromaticity lattices as the one of CLIC. To this end the ATF2 ultra-low ß* lattice is designed to vertically focus the beam at the focal point or usually referred to as interaction point (IP), down to 23 nm. However when the measured multipole components of the ATF2 magnets are considered in the simulations, the evaluated spot sizes at the IP are well above the design value. The designed spot size is effectively recovered by inserting a pair of octupole magnets. In this note we address the technical specifications required for these octupole magnets.

  19. Ultra-Low-Energy Germanium Detector for Neutrino-Nucleus Coherent Scattering and Dark Matter Searches

    E-Print Network [OSTI]

    Henry T. Wong

    2008-03-01T23:59:59.000Z

    The status and plans of a research program on the development of ultra-low-energy germanium detectors with sub-keV sensitivities are reported. We survey the scientific goals which include the observation of neutrino-nucleus coherent scattering, the studies of neutrino magnetic moments, as well as the searches of WIMP dark matter. In particular, a threshold of 100-200 eV and a sub-keV background comparable to underground experiments were achieved with prototype detectors. New limits were set for WIMPs with mass between 3-6 GeV. The prospects of the realization of full-scale experiments are discussed.

  20. Coherent-feedback control strategy to suppress spontaneous switching in ultra-low power optical bistability

    E-Print Network [OSTI]

    Hideo Mabuchi

    2011-01-18T23:59:59.000Z

    An optical resonator with intracavity Kerr nonlinearity can exhibit dispersive bistability suitable for all-optical switching. With nanophotonic elements it may be possible to achieve attojoule switching energies, which would be very attractive for ultra-low power operation but potentially problematic because of quantum fluctuation-induced spontaneous switching. In this manuscript I derive a quantum-optical model of two Kerr-nonlinear ring resonators connected in a coherent feedback loop, and show via numerical simulation that a properly designed `controller' cavity can significantly reduce the spontaneous switching rate of a bistable `plant' cavity in a completely embedded and autonomous manner.

  1. The Majorana experiment: an ultra-low background search for neutrinoless double-beta decay

    E-Print Network [OSTI]

    D. G. Phillips II; E. Aguayo; F. T. Avignone III; H. O. Back; A. S. Barabash; M. Bergevin; F. E. Bertrand; M. Boswell; V. Brudanin; M. Busch; Y. -D. Chan; C. D. Christofferson; J. I. Collar; D. C. Combs; R. J. Cooper; J. A. Detwiler; P. J. Doe; Y. Efremenko; V. Egorov; H. Ejiri; S. R. Elliott; J. Esterline; J. E. Fast; N. Fields; P. Finnerty; F. M. Fraenkle; V. M. Gehman; G. K. Giovanetti; M. P. Green; V. E. Guiseppe; K. Gusey; A. L. Hallin; R. Hazama; R. Henning; A. Hime; E. W. Hoppe; M. Horton; S. Howard; M. A. Howe; R. A. Johnson; K. J. Keeter; C. Keller; M. F. Kidd; A. Knecht; O. Kochetov; S. I. Konovalov; R. T. Kouzes; B. LaFerriere; B. H. LaRoque; J. Leon; L. E. Leviner; J. C. Loach; S. MacMullin; M. G. Marino; R. D. Martin; D. -M. Mei; J. Merriman; M. L. Miller; L. Mizouni; M. Nomachi; J. L. Orrell; N. R. Overman; A. W. P. Poon; G. Perumpilly; G. Prior; D. C. Radford; K. Rielage; R. G. H. Robertson; M. C. Ronquest; A. G. Schubert; T. Shima; M. Shirchenko; K. J. Snavely; D. Steele; J. Strain; K. Thomas; V. Timkin; W. Tornow; I. Vanyushin; R. L. Varner; K. Vetter; K. Vorren; J. F. Wilkerson; B. A. Wolfe; E. Yakushev; A. R. Young; C. -H. Yu; V. Yumatov; C. Zhang

    2011-11-23T23:59:59.000Z

    The observation of neutrinoless double-beta decay would resolve the Majorana nature of the neutrino and could provide information on the absolute scale of the neutrino mass. The initial phase of the Majorana experiment, known as the Demonstrator, will house 40 kg of Ge in an ultra-low background shielded environment at the 4850' level of the Sanford Underground Laboratory in Lead, SD. The objective of the Demonstrator is to determine whether a future 1-tonne experiment can achieve a background goal of one count per tonne-year in a narrow region of interest around the 76Ge neutrinoless double-beta decay peak.

  2. Update on Transition to Ultra-Low-Sulfur Diesel Fuel (released in AEO2006)

    Reports and Publications (EIA)

    2006-01-01T23:59:59.000Z

    On November 8, 2005, the Environmental Protection Agency (EPA) Administrator signed a direct final rule that will shift the retail compliance date for offering ultra-low sulfur diesel (ULSD) for highway use from September 1, 2006, to October 15, 2006. The change will allow more time for retail outlets and terminals to comply with the new 15 parts per million (ppm) sulfur standard, providing time for entities in the diesel fuel distribution system to flush higher sulfur fuel out of the system during the transition. Terminals will have until September 1, 2006, to complete their transitions to ULSD. The previous deadline was July 15, 2006.

  3. The MAJORANA experiment: an ultra-low background search for neutrinoless double-beta decay

    SciTech Connect (OSTI)

    Phillips, D.; Aguayo Navarrete, Estanislao; Avignone, Frank T.; Back, Henning O.; Barabash, Alexander S.; Bergevin, M.; Bertrand, F.; Boswell, M.; Brudanin, V.; Busch, Matthew; Chan, Yuen-Dat; Christofferson, Cabot-Ann; Collar, J. I.; Combs, Dustin C.; Cooper, R. J.; Detwiler, Jason A.; Doe, Peter J.; Efremenko, Yuri; Egorov, Viatcheslav; Ejiri, H.; Elliott, Steven R.; Esterline, James H.; Fast, James E.; Fields, N.; Finnerty, P.; Fraenkle, Florian; Gehman, Victor; Giovanetti, G. K.; Green, Matthew P.; Guiseppe, Vincente; Gusey, K.; Hallin, A. L.; Hazama, R.; Henning, Reyco; Hime, Andrew; Hoppe, Eric W.; Horton, Mark; Howard, Stanley; Howe, M. A.; Johnson, R. A.; Keeter, K.; Keller, C.; Kidd, Mary; Knecht, A.; Kochetov, Oleg; Konovalov, S.; Kouzes, Richard T.; LaFerriere, Brian D.; LaRoque, B. H.; Leon, Jonathan D.; Leviner, L.; Loach, J. C.; MacMullin, S.; Marino, Michael G.; Martin, R. D.; Mei, Dong-Ming; Merriman, Jason H.; Miller, M. L.; Mizouni, Leila; Nomachi, Masaharu; Orrell, John L.; Overman, Nicole R.; Poon, Alan; Perumpilly, Gopakumar; Prior, Gersende; Radford, D. C.; Rielage, Keith; Robertson, R. G. H.; Ronquest, M. C.; Schubert, Alexis G.; Shima, T.; Shirchenko, M.; Snavely, Kyle J.; Steele, David; Strain, J.; Thomas, K.; Timkin, V.; Tornow, W.; Vanyushin, I.; Varner, R. L.; Vetter, Kai; Vorren, Kris R.; Wilkerson, J. F.; Wolfe, B. A.; Yakushev, E.; Young, A.; Yu, Chang-Hong; Yumatov, Vladimir; Zhang, C.

    2012-12-01T23:59:59.000Z

    The observation of neutrinoless double-beta decay would resolve the Majorana nature of the neutrino and could provide information on the absolute scale of the neutrino mass. The initial phase of the Majorana Experiment, known as the Demonstrator, will house 40 kg of Ge in an ultra-low background shielded environment at the 4850' level of the Sanford Underground Laboratory in Lead, SD. The objective of the Demonstrator is to validate whether a future 1-tonne experiment can achieve a background goal of one count per tonne-year in a narrow region of interest around the 76Ge neutrinoless double-beta decay peak.

  4. Jump chaotic behaviour of ultra low loss bulk acoustic wave cavities

    SciTech Connect (OSTI)

    Goryachev, Maxim, E-mail: maxim.goryachev@uwa.edu.au; Farr, Warrick G.; Tobar, Michael E. [ARC Centre of Excellence for Engineered Quantum Systems, University of Western Australia, 35 Stirling Highway, Crawley WA 6009 (Australia); Galliou, Serge [Department of Time and Frequency, FEMTO-ST Institute, ENSMM, 26 Chemin de l'Épitaphe 25000 Besançon (France)

    2014-08-11T23:59:59.000Z

    We demonstrate a previously unobserved nonlinear phenomenon in an ultra-low loss quartz bulk acoustic wave cavity (Q>3>10{sup 9}), which only occurs below 20 mK in temperature and under relatively weak pumping. The phenomenon reveals the emergence of several stable equilibria (at least two foci and two nodes) and jumps between these quasi states at random times. The degree of this randomness as well as separations between levels can be controlled by the frequency of the incident carrier signal. It is demonstrated that the nature of the effect lies beyond the standard Duffing model.

  5. Silane-propane ignitor/burner

    DOE Patents [OSTI]

    Hill, Richard W. (Livermore, CA); Skinner, Dewey F. (Livermore, CA); Thorsness, Charles B. (Livermore, CA)

    1985-01-01T23:59:59.000Z

    A silane propane burner for an underground coal gasification process which is used to ignite the coal and to controllably retract the injection point by cutting the injection pipe. A narrow tube with a burner tip is positioned in the injection pipe through which an oxidant (oxygen or air) is flowed. A charge of silane followed by a supply of fuel, such as propane, is flowed through the tube. The silane spontaneously ignites on contact with oxygen and burns the propane fuel.

  6. Silane-propane ignitor/burner

    DOE Patents [OSTI]

    Hill, R.W.; Skinner, D.F. Jr.; Thorsness, C.B.

    1983-05-26T23:59:59.000Z

    A silane propane burner for an underground coal gasification process which is used to ignite the coal and to controllably retract the injection point by cutting the injection pipe. A narrow tube with a burner tip is positioned in the injection pipe through which an oxidant (oxygen or air) is flowed. A charge of silane followed by a supply of fuel, such as propane, is flowed through the tube. The silane spontaneously ignites on contact with oxygen and burns the propane fuel.

  7. Comparison of Hydrogen and Propane Fuels (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2008-10-01T23:59:59.000Z

    Factsheet comparing the chemical, physical, and thermal properties of hydrogen and propane, designed to facilitate an understanding of the differences and similarites of the two fuels

  8. Comparison of Hydrogen and Propane Fuels (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2009-04-01T23:59:59.000Z

    Factsheet comparing the chemical, physical, and thermal properties of hydrogen and propane, designed to facilitate an understanding of the differences and similarites of the two fuels.

  9. A University Consortium on Low Temperature Combustion for High Efficiency, Ultra-Low Emission Engines

    SciTech Connect (OSTI)

    Dennis N. Assanis; Arvind Atreya; Jyh-Yuan Chen; Wai K. Cheng; Robert W. Dibble; Chris Edwards; Zoran S. Filipi; Christian Gerdes; Hong Im; George A. Lavoie; Margaret S. Wooldridge

    2009-12-31T23:59:59.000Z

    The objective of the University consortium was to investigate the fundamental processes that determine the practical boundaries of Low Temperature Combustion (LTC) engines and develop methods to extend those boundaries to improve the fuel economy of these engines, while operating with ultra low emissions. This work involved studies of thermal effects, thermal transients and engine management, internal mixing and stratification, and direct injection strategies for affecting combustion stability. This work also examined spark-assisted Homogenous Charge Compression Ignition (HCCI) and exhaust after-treatment so as to extend the range and maximize the benefit of Homogenous Charge Compression Ignition (HCCI)/ Partially Premixed Compression Ignition (PPCI) operation. In summary the overall goals were: ? Investigate the fundamental processes that determine the practical boundaries of Low Temperature Combustion (LTC) engines. ? Develop methods to extend LTC boundaries to improve the fuel economy of HCCI engines fueled on gasoline and alternative blends, while operating with ultra low emissions. ? Investigate alternate fuels, ignition and after-treatment for LTC and Partially Premixed compression Ignition (PPCI) engines.

  10. Low-noise pulsed pre-polarization magnet system for ultra-low field NMR

    SciTech Connect (OSTI)

    Sims, James R [Los Alamos National Laboratory; Schilling, Josef B [Los Alamos National Laboratory; Swenson, Charles A [Los Alamos National Laboratory; Gardner, David L [Los Alamos National Laboratory; Matlashov, Andrei N [Los Alamos National Laboratory; Ammerman, Curti N [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    A liquid cooled, pulsed electromagnet of solenoid configuration suitable for duty in an ultra-low field nuclear magnetic resonance system has been designed, fabricated and successfully operated. The magnet design minimizes Johnson noise, minimizes the hydrogen signal and incorporates minimal metal and no ferromagnetic materials. In addition, an acoustically quiet cooling system permitting 50% duty cycle operation was achieved by designing for single-phase, laminar flow, forced convection cooling. Winding, conductor splicing and epoxy impregnation techniques were successfully developed to produce a coil winding body with integral cooling passageways and adequate structural integrity. Issues of material compatibility, housing, coolant flow system and heat rejection system design will be discussed. Additionally, this pulsed electromagnet design has been extended to produce a boiling liquid cooled version in a paired solenoid configuration suitable for duty in an ultra-low field nuclear magnetic resonance system. This pair of liquid nitrogen cooled coils is currently being tested and commissioned. Issues of material compatibility, thermal insulation, thermal contraction, housing and coolant flow design are discussed.

  11. Controlling Low-Rate Signal Path Microdischarge for an Ultra-Low-Background Proportional Counter

    SciTech Connect (OSTI)

    Mace, Emily K.; Aalseth, Craig E.; Bonicalzi, Ricco; Day, Anthony R.; Hoppe, Eric W.; Keillor, Martin E.; Myers, Allan W.; Overman, Cory T.; Seifert, Allen

    2013-05-01T23:59:59.000Z

    ABSTRACT Pacific Northwest National Laboratory (PNNL) has developed an ultra-low-background proportional counter (ULBPC) made of high purity copper. These detectors are part of an ultra-low-background counting system (ULBCS) in the newly constructed shallow underground laboratory at PNNL (at a depth of ~30 meters water-equivalent). To control backgrounds, the current preamplifier electronics are located outside the ULBCS shielding. Thus the signal from the detector travels through ~1 meter of cable and is potentially susceptible to high voltage microdischarge and other sources of electronic noise. Based on initial successful tests, commercial cables and connectors were used for this critical signal path. Subsequent testing across different batches of commercial cables and connectors, however, showed unwanted (but still low) rates of microdischarge noise. To control this noise source, two approaches were pursued: first, to carefully validate cables, connectors, and other commercial components in this critical signal path, making modifications where necessary; second, to develop a custom low-noise, low-background preamplifier that can be integrated with the ULBPC and thus remove most commercial components from the critical signal path. This integrated preamplifier approach is based on the Amptek A250 low-noise charge-integrating preamplifier module. The initial microdischarge signals observed are presented and characterized according to the suspected source. Each of the approaches for mitigation is described, and the results from both are compared with each other and with the original performance seen with commercial cables and connectors.

  12. Residual Dipolar Couplings in Zero-to-Ultra-Low-Field Nuclear Magnetic Resonance

    E-Print Network [OSTI]

    Blanchard, John W; King, Jonathan P; Ledbetter, Micah P; Levine, Emma H; Bajaj, Vikram S; Budker, Dmitry; Pines, Alexander

    2015-01-01T23:59:59.000Z

    Zero-to-ultra-low-field nuclear magnetic resonance (ZULF-NMR) provides a new regime for the measurement of nuclear spin-spin interactions free from effects of large magnetic fields, such as truncation of terms that do not commute with the Zeeman Hamiltonian. One such interaction, the magnetic dipole-dipole coupling, is a valuable source of spatial information in NMR, though many terms are unobservable in high-field NMR, and the interaction averages to zero under isotropic molecular tumbling. Under partial orientational ordering, this information is retained in the form of so-called residual dipolar couplings. We report zero-to-ultra-low-field NMR measurements of residual dipolar couplings in acetonitrile-2-$^{13}$C aligned in stretched polyvinyl acetate gels. This represents the first investigation of dipolar couplings as a perturbation on the indirect spin-spin $J$-coupling in the absence of an applied magnetic field. As a consequence of working at zero magnetic field, we observe terms of the dipole-dipole c...

  13. Residential propane price decreases slightly

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade Year-0E (2001) -heating oil pricepropane price05, 2014propane price

  14. 156 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 14, NO. 4, APRIL 2004 An Ultra-Low Power InAs/AlSb HEMT Ka-Band

    E-Print Network [OSTI]

    Rodwell, Mark J. W.

    156 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 14, NO. 4, APRIL 2004 An Ultra-Low Power dc power dissipation of the ABCS LNA was an ultra-low 1.5 mW per stage, or 4.5 mW total. This is less amplifier, mil- limeter-waves. I. INTRODUCTION ULTRA-LOW power millimeter-wave low-noise am- plifiers (LP

  15. Heating Oil and Propane Update - Energy Information Administration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Petroleum Reports Heating Oil and Propane Update Weekly heating oil and propane prices are only collected during the heating season, which extends from October through March....

  16. Computational Chemistry-Based Identification of Ultra-Low Temperature Water-Gas-Shift Catalysts

    SciTech Connect (OSTI)

    Manos Mavrikakis

    2008-08-31T23:59:59.000Z

    The current work seeks to identify novel, catalytically-active, stable, poison-resistant LWGS catalysts that retain the superior activity typical of conventional Cu catalysts but can be operated at similar or lower temperatures. A database for the Binding Energies (BEs) of the LWGS relevant species, namely CO, O and OH on the most-stable, close-packed facets of a set of 17 catalytically relevant transition metals was established. This BE data and a database of previously established segregation energies was utilized to predict the stability of bimetallic NSAs that could be synthesized by combinations of the 17 parent transition metals. NSAs that were potentially stable both in vacuo and under the influence of strong-binding WGS intermediates were then selected for adsorption studies. A set of 40 NSAs were identified that satisfied all three screener criteria and the binding energies of CO, O and OH were calculated on a set of 66, 43 and 79 NSA candidates respectively. Several NSAs were found that bound intermediates weaker than the monometallic catalysts and were thus potentially poison-resistant. Finally, kinetic studies were performed and resulted in the discovery of a specific NSA-based bimetallic catalyst Cu/Pt that is potentially a promising LWGS catalyst. This stable Cu/Pt subsurface alloy is expected to provide facile H{sub 2}O activation and remain relatively resistant from the poisoning by CO, S and formate intermediates.

  17. COST-EFFECTIVE CONTROL OF NOx WITH INTEGRATED ULTRA LOW-NOx BURNERS AND SNCR

    SciTech Connect (OSTI)

    Hamid Farzan

    2001-07-01T23:59:59.000Z

    Coal-fired electric utilities are facing a serious challenge with regards to curbing their NO{sub x} emissions. At issue are the NO{sub x} contributions to the acid rain, ground level ozone, and particulate matter formation. Substantial NO{sub x} control requirements could be imposed under the proposed Ozone Transport Rule, National Ambient Air Quality Standards, and New Source Performance Standards. McDermott Technology, Inc. (MTI), Babcock and Wilcox (B and W), and Fuel Tech are teaming to provide an integrated solution for NO{sub x} control. The system will be comprised of an ultra low-NO{sub x} pulverized coal (PC) burner technology plus a urea-based, selective non-catalytic reduction (SNCR) system. This system will be capable of meeting a target emission limit of 0.15 lb NO{sub x}/10{sup 6} Btu and target ammonia (NH3) slip level targeted below 5 ppmV for commercial units. Our approach combines the best available combustion and post-combustion NO{sub x} control technologies. More specifically, B and W's DRB-4Z TM ultra low-NO{sub x} PC burner technology will be combined with Fuel Tech's NO{sub x}OUT (SNCR) and NO{sub x}OUT Cascade (SNCR/SCR hybrid) systems and jointly evaluated and optimized in a state-of-the-art test facility at MTI. Although the NO{sub x}OUT Cascade (SNCR/SCR hybrid) system will not be tested directly in this program, its potential application for situations that require greater NO{sub x} reductions will be inferred from other measurements (i.e., SNCR NO{sub x} removal efficiency plus projected NO{sub x} reduction by the catalyst based on controlled ammonia slip). Our analysis shows that the integrated ultra low-NO{sub x} burner and SNCR system has the lowest cost when the burner emissions are 0.25 lb NO{sub x}/10{sup 6} Btu or less. At burner NO{sub x} emission level of 0.20 lb NO{sub x}/10{sup 6} Btu, the levelized cost per ton of NO{sub x} removed is 52% lower than the SCR cost.

  18. Ultra-low field NMR for detection and characterization of 235 UF6

    SciTech Connect (OSTI)

    Espy, Michelle A [Los Alamos National Laboratory; Magnelind, Per E [Los Alamos National Laboratory; Matlashov, Andrei N [Los Alamos National Laboratory; Urbaitis, Algis V [Los Alamos National Laboratory; Volegov, Petr L [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    We have demonstrated the first ultra-low field (ULF) nuclear magnetic resonance measurements of uranium hexafluoride (UF{sub 6}), both depleted and 70% enriched, which is used in the uranium enrichment process. A sensitive non-invasive detection system would have an important role in non-proliferation surveillance. A two-frequency technique was employed to remove the transients induced by rapidly switching off the 50 mT pre-polarization field. A mean transverse relaxation time T{sub 2} of 24 ms was estimated for the un-enriched UF{sub 6} sample measured at a mean temperature of 80 C. Nuclear magnetic resonance at ULF has several advantages including the ability to measure through metal, such as pipes, and simple magnetic field generation hardware. We present here recent data and discuss the potential for non-proliferation monitoring of enrichment and flow velocity.

  19. Ultra low energy results and their impact to dark matter and low energy neutrino physics

    E-Print Network [OSTI]

    E. Bougamont; P. Colas; J. Derre; I. Giomataris; G. Gerbier; M. Gros; P. Magnier; X. F. Navick; P. Salin; I. Savvidis; G. Tsiledakis; J. D. Vergados

    2010-10-20T23:59:59.000Z

    We present ultra low energy results taken with the novel Spherical Proportional Counter. The energy threshold has been pushed down to about 25 eV and single electrons are clearly collected and detected. To reach such performance low energy calibration systems have been successfully developed: - A pulsed UV lamp extracting photoelectrons from the inner surface of the detector - Various radioactive sources allowing low energy peaks through fluorescence processes. The bench mark result is the observation of a well resolved peak at 270 eV due to carbon fluorescence which is unique performance for such large-massive detector. It opens a new window in dark matter and low energy neutrino search and may allow detection of neutrinos from a nuclear reactor or from supernova via neutrino-nucleus elastic scattering

  20. Low energy conversion electron detection in superfluid He3 at ultra-low temperature

    E-Print Network [OSTI]

    E. Moulin; C. Winkelmann; J. F. Macias-Perez; Yu. M. Bunkov; H. Godfrin; D. Santos

    2005-04-12T23:59:59.000Z

    We report on the first results of the MACHe3 (MAtrix of Cells of Helium 3) prototype experiment concerning the measurement of low energy conversion electrons at ultra-low temperature. For the first time, the feasibility of the detection of low energy electrons is demonstrated in superfluid He3-B cooled down to 100 microK. Low energy electrons at 7.3 keV coming from the K shell conversion of the 14.4 keV nuclear transition of a low activity Co57 source are detected, opening the possibility to use a He3-based detector for the detection of Weakly Interacting Massive Particles (WIMPs) which are expected to release an amount of energy higher-bounded by 5.6 keV.

  1. Direct imaging of neural currents using ultra-low field magnetic resonance techniques

    DOE Patents [OSTI]

    Volegov, Petr L. (Los Alamos, NM); Matlashov, Andrei N. (Los Alamos, NM); Mosher, John C. (Los Alamos, NM); Espy, Michelle A. (Los Alamos, NM); Kraus, Jr., Robert H. (Los Alamos, NM)

    2009-08-11T23:59:59.000Z

    Using resonant interactions to directly and tomographically image neural activity in the human brain using magnetic resonance imaging (MRI) techniques at ultra-low field (ULF), the present inventors have established an approach that is sensitive to magnetic field distributions local to the spin population in cortex at the Larmor frequency of the measurement field. Because the Larmor frequency can be readily manipulated (through varying B.sub.m), one can also envision using ULF-DNI to image the frequency distribution of the local fields in cortex. Such information, taken together with simultaneous acquisition of MEG and ULF-NMR signals, enables non-invasive exploration of the correlation between local fields induced by neural activity in cortex and more `distant` measures of brain activity such as MEG and EEG.

  2. Ultra low-K shrinkage behavior when under electron beam in a scanning electron microscope

    SciTech Connect (OSTI)

    Lorut, F.; Imbert, G. [ST Microelectronics, 850 rue Jean Monnet, 38926 Crolles Cedex (France)] [ST Microelectronics, 850 rue Jean Monnet, 38926 Crolles Cedex (France); Roggero, A. [Centre National d'Etudes Spatiales, 18 Avenue Edouard Belin, 31400 Toulouse (France)] [Centre National d'Etudes Spatiales, 18 Avenue Edouard Belin, 31400 Toulouse (France)

    2013-08-28T23:59:59.000Z

    In this paper, we investigate the tendency of porous low-K dielectrics (also named Ultra Low-K, ULK) behavior to shrink when exposed to the electron beam of a scanning electron microscope. Various experimental electron beam conditions have been used for irradiating ULK thin films, and the resulting shrinkage has been measured through use of an atomic force microscope tool. We report the shrinkage to be a fast, cumulative, and dose dependent effect. Correlation of the shrinkage with incident electron beam energy loss has also been evidenced. The chemical modification of the ULK films within the interaction volume has been demonstrated, with a densification of the layer and a loss of carbon and hydrogen elements being observed.

  3. A magnetically shielded room with ultra low residual field and gradient

    SciTech Connect (OSTI)

    Altarev, I.; Chesnevskaya, S.; Gutsmiedl, E.; Kuchler, F.; Lins, T.; Marino, M.; McAndrew, J.; Niessen, B.; Paul, S.; Petzoldt, G.; Singh, J.; Stoepler, R.; Stuiber, S.; Sturm, M.; Taubenheim, B. [Physikdepartment, Technische Universität München, D-85748 Garching (Germany); Babcock, E. [Jülich Center for Neutron Science, Lichtenbergstrasse 1, D-85748 Garching (Germany); Beck, D.; Sharma, S. [Physics Department, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States); Burghoff, M.; Fan, I. [Physikalisch-Technische Bundesanstalt Berlin, D-10587 Berlin (Germany); and others

    2014-07-15T23:59:59.000Z

    A versatile and portable magnetically shielded room with a field of (700 ± 200) pT within a central volume of 1 m × 1 m × 1 m and a field gradient less than 300 pT/m, achieved without any external field stabilization or compensation, is described. This performance represents more than a hundredfold improvement of the state of the art for a two-layer magnetic shield and provides an environment suitable for a next generation of precision experiments in fundamental physics at low energies; in particular, searches for electric dipole moments of fundamental systems and tests of Lorentz-invariance based on spin-precession experiments. Studies of the residual fields and their sources enable improved design of future ultra-low gradient environments and experimental apparatus. This has implications for developments of magnetometry beyond the femto-Tesla scale in, for example, biomagnetism, geosciences, and security applications and in general low-field nuclear magnetic resonance (NMR) measurements.

  4. Ultra--low noise differential AC-coupled photodetector for sensitive pulse detection applications

    E-Print Network [OSTI]

    P. J. Windpassinger; M. Kubasik; M. Koschorreck; A. Boisen; N. Kjaergaard; E. S. Polzik; J. H. Mueller

    2009-03-19T23:59:59.000Z

    We report on the performance of ultra low noise differential photodetectors especially designed for probing of atomic ensembles with weak light pulses. The working principle of the detectors is described together with the analysis procedures employed to extract the photon shot noise of light pulses with $\\sim1 \\mu$s duration. As opposed to frequency response peaked detectors, our approach allows for broadband quantum noise measurements. The equivalent noise charge (ENC) for two different hardware approaches is evaluated to 280 and 340 electrons per pulse, respectively which corresponds to a dark noise equivalent photon number of $n_\\mathrm{3dB}=0.8\\cdot 10^5$ and $n_\\mathrm{3dB}=1.2\\cdot 10^5$ in the two approaches. Finally, we discuss the possibility of removing classical correlations in the output signal caused by detector imperfection by using double--correlated sampling methods.

  5. Method for fabricating an ultra-low expansion mask blank having a crystalline silicon layer

    DOE Patents [OSTI]

    Cardinale, Gregory F. (Oakland, CA)

    2002-01-01T23:59:59.000Z

    A method for fabricating masks for extreme ultraviolet lithography (EUVL) using Ultra-Low Expansion (ULE) substrates and crystalline silicon. ULE substrates are required for the necessary thermal management in EUVL mask blanks, and defect detection and classification have been obtained using crystalline silicon substrate materials. Thus, this method provides the advantages for both the ULE substrate and the crystalline silicon in an Extreme Ultra-Violet (EUV) mask blank. The method is carried out by bonding a crystalline silicon wafer or member to a ULE wafer or substrate and thinning the silicon to produce a 5-10 .mu.m thick crystalline silicon layer on the surface of the ULE substrate. The thinning of the crystalline silicon may be carried out, for example, by chemical mechanical polishing and if necessary or desired, oxidizing the silicon followed by etching to the desired thickness of the silicon.

  6. Prospects of cold dark matter searches with an ultra-low-energy germanium detector

    E-Print Network [OSTI]

    H. T. Wong

    2007-11-08T23:59:59.000Z

    The report describes the research program on the development of ultra-low-energy germanium detectors, with emphasis on WIMP dark matter searches. A threshold of 100 eV is achieved with a 20 g detector array, providing a unique probe to the low-mas WIMP. Present data at a surface laboratory is expected to give rise to comparable sensitivities with the existing limits at the $\\rm{5 - 10 GeV}$ WIMP-mass range. The projected parameter space to be probed with a full-scale, kilogram mass-range experiment is presented. Such a detector would also allow the studies of neutrino-nucleus coherent scattering and neutrino magnetic moments.

  7. 29Counting Atoms in a Molecule The complex molecule Propanal

    E-Print Network [OSTI]

    29Counting Atoms in a Molecule The complex molecule Propanal was discovered in a dense interstellar is the ratio of carbon atoms to hydrogen atoms in propanal? Problem 4 - If the mass of a hydrogen atom of a propanal molecule in AMUs? Problem 5 - What is the complete chemical formula for propanal? C3 H __ O

  8. Alternative Fuel Tool Kit How to Implement: Propane

    E-Print Network [OSTI]

    1 08/2014 Alternative Fuel Tool Kit How to Implement: Propane Contents Introduction to Propane (LPG...........................................................................................................2 Benefits of Using Propane (LPG) for Transportation of Energy under Award Number DE-EE0006083. #12;2 08/2014 Introduction to Propane (LPG) for Transportation

  9. Evolutionary History of a Specialized P450 Propane Monooxygenase

    E-Print Network [OSTI]

    Arnold, Frances H.

    Evolutionary History of a Specialized P450 Propane Monooxygenase Rudi Fasan1 , Yergalem T-evolved P450 propane mono- oxygenase (P450PMO) having 20 heme domain substitutions compared to P450BM3 of propane activity. In contrast, refinement of the enzyme catalytic efficiency for propane oxidation (9000

  10. Repetitive Ultra-low Stress Induced Nanocrystallization in Amorphous Cu?Zr?Al Alloy Evidenced by in situ Nanoindentation 

    E-Print Network [OSTI]

    Liu, Y.; Jian, J.; Lee, J. H.; Wang, C.; Cao, Q. P.; Gutierrez, C.; Wang, H.; Jiang, J. Z.; Zhang, X.

    2014-05-12T23:59:59.000Z

    . In this study, we show, via in situ nanoindentation of amorphous Cu44Zr44Al12 alloy in a transmission electron microscope that the formation of nanocrystals occurred at an ultra-low stress of 0.25 GPa in the elastic deformation regime, accompanied by load...

  11. Ultra Low-Cost 3.2Gb/s Optical-Rate Reed Solomon Decoder IC Design

    E-Print Network [OSTI]

    Hung, Shih-Hao

    decoder by using a novel Just-in-Time Folding Modified Euclidean Algorithm (JIT-FMEA). The JIT- FMEA VLSI called Just-in-Time Folding Modified Euclidean Algorithm (JIT-FMEA), which can construes an ultra low of JIT-FMEA architecture can overcome the critical paths of the bottleneck in a RS decoding procedure

  12. Propane vehicles : status, challenges, and opportunities.

    SciTech Connect (OSTI)

    Rood Werpy, M.; Burnham, A.; Bertram, K.; Energy Systems

    2010-06-17T23:59:59.000Z

    Propane as an auto fuel has a high octane value and has key properties required for spark-ignited internal combustion engines. To operate a vehicle on propane as either a dedicated fuel or bi-fuel (i.e., switching between gasoline and propane) vehicle, only a few modifications must be made to the engine. Until recently propane vehicles have commonly used a vapor pressure system that was somewhat similar to a carburetion system, wherein the propane would be vaporized and mixed with combustion air in the intake plenum of the engine. This leads to lower efficiency as more air, rather than fuel, is inducted into the cylinder for combustion (Myers 2009). A newer liquid injection system has become available that injects propane directly into the cylinder, resulting in no mixing penalty because air is not diluted with the gaseous fuel in the intake manifold. Use of a direct propane injection system will improve engine efficiency (Gupta 2009). Other systems include the sequential multi-port fuel injection system and a bi-fuel 'hybrid' sequential propane injection system. Carbureted systems remain in use but mostly for non-road applications. In the United States a closed-loop system is used in after-market conversions. This system incorporates an electronic sensor that provides constant feedback to the fuel controller to allow it to measure precisely the proper air/fuel ratio. A complete conversion system includes a fuel controller, pressure regulator valves, fuel injectors, electronics, fuel tank, and software. A slight power loss is expected in conversion to a vapor pressure system, but power can still be optimized with vehicle modifications of such items as the air/fuel mixture and compression ratios. Cold start issues are eliminated for vapor pressure systems since the air/fuel mixture is gaseous. In light-duty propane vehicles, the fuel tank is typically mounted in the trunk; for medium- and heavy-duty vans and trucks, the tank is located under the body of the vehicle. Propane tanks add weight to a vehicle and can slightly increase the consumption of fuel. On a gallon-to-gallon basis, the energy content of propane is 73% that of gasoline, thus requiring more propane fuel to travel an equivalent distance, even in an optimized engine (EERE 2009b).

  13. Knoxville Area Transit: Propane Hybrid Electric Trolleys

    SciTech Connect (OSTI)

    Not Available

    2005-04-01T23:59:59.000Z

    A 2-page fact sheet summarizing the evaluation done by the U.S. Department of Energy's Advanced Vehicle Testing Activity on the Knoxville Area Transit's use of propane hybrid electric trolleys.

  14. QER- Comment of Propane Education & Research Council

    Broader source: Energy.gov [DOE]

    I plan to attend and ask a question of the Secretary regarding propane supply for the upcoming winter. Please do not hesitate to call or email if you have questions. Tucker Perkins

  15. Hydrogen Safety Issues Compared to Safety Issues with Methane and Propane

    E-Print Network [OSTI]

    Green, Michael A.

    2005-01-01T23:59:59.000Z

    Issues with Methane and Propane Michael A. Green LawrenceSAFETY ISSUES WITH METHANE AND PROPANE M. A. Green Lawrencehydrogen. Methane and propane are commonly used by ordinary

  16. 4-70C Propane (molar mass = 44.1 kg/kmol) poses a greater fire danger than methane (molar mass = 16 kg/kmol) since propane is heavier than air (molar mass = 29 kg/kmol), and it will settle near the floor.

    E-Print Network [OSTI]

    Bahrami, Majid

    4-36 Ideal Gas 4-70C Propane (molar mass = 44.1 kg/kmol) poses a greater fire danger than methane (molar mass = 16 kg/kmol) since propane is heavier than air (molar mass = 29 kg/kmol), and it will settle MATERIAL. © 2008 The McGraw-Hill Companies, Inc. Limited distribution permitted only to teachers

  17. Infrared Spectroscopy of the Ultra Low Mass Binary Oph 162225-240515

    E-Print Network [OSTI]

    Alexis Brandeker; Ray Jayawardhana; Valentin D. Ivanov; Radostin Kurtev

    2006-10-19T23:59:59.000Z

    Binary properties are an important diagnostic of the star and brown dwarf formation processes. While wide binaries appear to be rare in the sub-stellar regime, recent observations have revealed Ophiuchus 162225-240515 (2MASS J16222521-2405139) as a likely young ultra-low-mass binary with an apparent separation of ~240 AU. Here, we present low-resolution near-infrared spectra of the pair from NTT/SOFI (R~600) and VLT/ISAAC (R~1400), covering the 1.0-2.5um spectral region. By comparing to model atmospheres from Chabrier & Baraffe and Burrows et al., we confirm the surface temperatures to be T_A = (2350+/-150) K and T_B = (2100+/-100) K for the two components of the binary, consistent with earlier estimates from optical spectra. Using gravity sensitive K I features, we find the surface gravity to be significantly lower than field dwarfs of the same spectral type, providing the best evidence so far that these objects are indeed young. However, we find that models are not sufficiently reliable to infer accurate ages/masses from surface gravity. Instead, we derive masses of M_A = 13 (+8/-4) M_J and M_B = 10 (+5/-4) M_J for the two objects using the well-constrained temperatures and assuming an age of 1-10 Myr, consistent with the full range of ages reported for the Oph region.

  18. An ultra low noise AC beam transformer for deceleration and diagnostics of low intensity beams

    E-Print Network [OSTI]

    González, C

    1999-01-01T23:59:59.000Z

    The design of a broad band ultra-low noise ferrite loaded AC beam transformer is presented. It is designed for use in the CERN Antiproton Decelerator (AD), where beams of a few 107 charges must be decelerated from 3.5 GeV/c to 100 MeV/c. It is used in the RF beam-phase loop, and for intensity and bunch shape measurements during deceleration. When the beam is debunched for cooling on magnetic flat tops, the pick-up is used for measurements of intensity and momentum distribution by means of longitudinal Schottky scans. When used as Schottky pick-up, the signal to noise ratio should be better by about 40 dB than the existing stripline based longitudinal Schottky pick-up. The integrated design of pick-up and associated low-noise amplifier is presented. The achieved noise performance of a few from 1 to 3 MHz is obtained by attaching a low-noise, high-impedance silicon JFET (junction field effect transistor) amplifier to a high-Q resonant ferrite loaded cavity, and then eliminating the resonant response by low-nois...

  19. Progress on detection of liquid explosives using ultra-low field MRI

    SciTech Connect (OSTI)

    Espy, Michelle A [Los Alamos National Laboratory; Matlashov, Andrei N [Los Alamos National Laboratory; Volegov, Petr L [Los Alamos National Laboratory; Schuttz, Larry M [Los Alamos National Laboratory; Baguisa, Shermiyah [Los Alamos National Laboratory; Dunkerley, David [Los Alamos National Laboratory; Magnelind, Per [Los Alamos National Laboratory; Owens, Tuba [Los Alamos National Laboratory; Sandin, Henrik [Los Alamos National Laboratory; Urbaitis, Algis [Los Alamos National Laboratory

    2010-01-01T23:59:59.000Z

    Nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) methods are widely used in medicine, chemistry and industry. Over the past several years there has been increasing interest in performing NMR and MRI in the ultra-low field (ULF) regime, with measurement field strengths of 10-100 microTesla and pre-polarization fields of 30-50 mTesla. The real-time signal-to-noise ratio for such measurements is about 100. Our group at LANL has built and demonstrated the performance of SQUID-based ULF NMR/MRI instrumentation for classification of materials and detection of liquid explosives via their relaxation properties measured at ULF, using T{sub 1}, and T{sub 2}, and T{sub 1} frequency dispersion. We are also beginning to investigate the performance of induction coils as sensors. Here we present recent progress on the applications of ULF MR to the detection of liquid explosives, in imaging and relaxometry.

  20. Syngas Production from Propane using Atmospheric Non-Thermal Plasma F. Ouni, A. Khacef*

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Syngas Production from Propane using Atmospheric Non-Thermal Plasma F. Ouni, A. Khacef* and J. M applications (1, 2) . Synthesis gas or syngas (mixture of hydrogen and carbon monoxide) are used as a major. The conventional reformers allowing syngas production are based on steam reforming of hydrocarbons (3) following

  1. The determination of compressibility factors of gaseous propane-nitrogen mixtures 

    E-Print Network [OSTI]

    Hodges, Don

    1952-01-01T23:59:59.000Z

    of thc Beg;voc cf kBSTBACT The propane-nitrogen system has been investigated in the gaseous phase at a temperature of 300 F. and at pressures up to 4/0 atmospheres. Compressibility curves for three mixtures of this system have been determined. A... the pressure corresponding to the "n " expansion ? th? the partial pressure of nitrogen the partial pressure oi' propane the total pressure of a gaseous system the universal gas constant (0. 08206 liter-atmosphere/ gram mole - oK) the absolute...

  2. The determination of compressibility factors of gaseous propane-nitrogen mixtures

    E-Print Network [OSTI]

    Hodges, Don

    1952-01-01T23:59:59.000Z

    of thc Beg;voc cf kBSTBACT The propane-nitrogen system has been investigated in the gaseous phase at a temperature of 300 F. and at pressures up to 4/0 atmospheres. Compressibility curves for three mixtures of this system have been determined. A... the pressure corresponding to the "n " expansion ? th? the partial pressure of nitrogen the partial pressure oi' propane the total pressure of a gaseous system the universal gas constant (0. 08206 liter-atmosphere/ gram mole - oK) the absolute...

  3. SRC, SIA Tackle Ultra-Low Power SoC Design Challenges for 'Extreme... http://home.businesswire.com/portal/site/google/index.jsp?ndmViewId... 1 of 3 10/10/2006 11:19 PM

    E-Print Network [OSTI]

    Hempstead, Mark

    SRC, SIA Tackle Ultra-Low Power SoC Design Challenges for 'Extreme... http://home.businesswire Eastern Time SRC, SIA Tackle Ultra-Low Power SoC Design Challenges for `Extremely Scaled' Silicon via supply of talented design engineers." The Harvard entry, "Design and Implementation of an Ultra-Low

  4. ATF2 ULTRA-LOW IP BETAS PROPOSAL R. Tomas, H. Braun, J.P. Delahaye, E. Marn, D. Schulte, F. Zimmermann, CERN

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ATF2 ULTRA-LOW IP BETAS PROPOSAL R. Tom´as, H. Braun, J.P. Delahaye, E. Mar´n, D. Schulte, F at these ultra-low IP betas. INTRODUCTION ATF2 is a test facility with the aim of testing the FFS design that has Design 0.1 1.0 19000 ATF2 ultra-low Proposed 0.025 1.0 76000 CLIC 3TeV Design 0.09 3.5 63000 ILC Design 0

  5. State Heating Oil & Propane Program. Final report 1997/98 heating season

    SciTech Connect (OSTI)

    Hunton, G.

    1998-06-01T23:59:59.000Z

    The following is a summary report of the New Hampshire Governor`s Office of Energy and Community Services (ECS) participation in the State Heating Oil and Propane Program (SHOPP) for the 1997/98 heating season. SHOPP is a cooperative effort, linking energy offices in East Coast and Midwest states, with the Department of Energy (DOE), Energy Information Administration (EIA) for the purpose of collecting retail price data for heating oil and propane. The program is funded by the participating state with a matching grant from DOE. SHOPP was initiated in response to congressional inquires into supply difficulties and price spikes of heating oil and propane associated with the winter of 1989/90. This is important to New Hampshire because heating oil controls over 55% of the residential heating market statewide. Propane controls 10% of the heating market statewide and is widely used for water heating and cooking in areas of the state where natural gas is not available. Lower installation cost, convenience, lower operating costs compared to electricity, and its perception as a clean heating fuel have all worked to increase the popularity of propane in New Hampshire and should continue to do so in the future. Any disruption in supply of these heating fuels to New Hampshire could cause prices to skyrocket and leave many residents in the cold.

  6. Syngas Production from Propane Using Atmospheric Non-thermal Plasma

    E-Print Network [OSTI]

    Ouni, Fakhreddine; Cormier, Jean Marie; 10.1007/s11090-009-9166-2

    2009-01-01T23:59:59.000Z

    Propane steam reforming using a sliding discharge reactor was investigated under atmospheric pressure and low temperature (420 K). Non-thermal plasma steam reforming proceeded efficiently and hydrogen was formed as a main product (H2 concentration up to 50%). By-products (C2-hydrocarbons, methane, carbon dioxide) were measured with concentrations lower than 6%. The mean electrical power injected in the discharge is less than 2 kW. The process efficiency is described in terms of propane conversion rate, steam reforming and cracking selectivity, as well as by-products production. Chemical processes modelling based on classical thermodynamic equilibrium reactor is also proposed. Calculated data fit quiet well experimental results and indicate that the improvement of C3H8 conversion and then H2 production can be achieved by increasing the gas fraction through the discharge. By improving the reactor design, the non-thermal plasma has a potential for being an effective way for supplying hydrogen or synthesis gas.

  7. Effect of silicon on ultra-low temperature toughness of Nb–Ti microalloyed cryogenic pressure vessel steels

    SciTech Connect (OSTI)

    Qiu, J.A. [Hubei Collaborative Innovation Center for Advanced Steels, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081 (China); Wu, K.M., E-mail: wukaiming2000@yahoo.com [Hubei Collaborative Innovation Center for Advanced Steels, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081 (China); Li, J.H. [Hubei Collaborative Innovation Center for Advanced Steels, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081 (China); Research and Development Center of WISCO, Wuhan 430080 (China); Hodgson, P.D. [Hubei Collaborative Innovation Center for Advanced Steels, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081 (China); Institute for Frontier Materials, Deakin University, Geelong, Victoria 3220 (Australia); Hou, T.P. [Hubei Collaborative Innovation Center for Advanced Steels, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081 (China); Ding, Q.F. [Research and Development Center of WISCO, Wuhan 430080 (China)

    2013-09-15T23:59:59.000Z

    The effect of Si on the ultra-low temperature toughness of Nb–Ti microalloyed cryogenic pressure vessel steels was investigated by electron back-scattered diffraction and transmission electron microscope with energy dispersive spectroscopy. Equiaxed ferrite and bainite were obtained in the tempered steels with small Si additions. Nanosized Nb–Ti carbides (< 10 nm) were formed in the steel containing 0.05% Si, whereas much coarser carbides (> 30 nm) were found in the steel containing 0.47% Si. The ultra-low temperature toughness of the Nb–Ti microalloyed cryogenic pressure vessel steel was remarkably enhanced by the reduction in the Si content, which was attributed to the pre-existing iron carbide formation before the precipitation of nanosized Nb–Ti carbides during tempering. - Highlights: • Nanosized Nb-Ti carbides formed in the tempered steel with smaller Si addition. • Coarser Nb-Ti carbides formed in the tempered steel with more Si addition. • Pre-existing cememtites provide nucleation sites for Nb-Ti carbide precipitation. • Ultra-low temperature toughness was remarkably enhanced by Si content reduction.

  8. The Design of an Ultra-Low Background Thermosyphon for the Majorana Demonstrator

    SciTech Connect (OSTI)

    Aguayo Navarrete, Estanislao; Busch, Matthew; Daniels, Randy; Fast, James E.; Green, Matthew P.; Reid, Douglas J.

    2013-05-01T23:59:59.000Z

    The MAJORANA DEMONSTRATOR (MJD) is an ultra-low background neutrinoless double-beta decay (0???) experiment that will deploy up to 40 kg of high purity germanium detectors (HPGe). The goal of this experiment is to demonstrate the feasibility of building a detector array with less than 1 event/ton-year in a 4 keV region of interest around the 0??? signal. HPGe diodes, when used as ionizing radiation detectors, need to be maintained at a temperature close to that of liquid nitrogen (77 K). This work describes the R&D results of a cryogenic system capable of meeting the requirements of low background and the cooling capacity required to successfully operate such a detector system. The MJD germanium detector modules will operate at liquid nitrogen temperature to provide adequate cooling for a full range of HPGe impurity concentrations. This paper shows the experimental results obtained using a two-phase horizontal thermosyphon using liquid nitrogen as the MJD’s cooling system. The cold test shows that the proposed thermosyphon has sufficient cooling power to handle the heat load of an MJD module. Results for the temperature gradient across the thermosyphon, cooling capacity, and design considerations demonstrate that the thermosyphon can effectively remove the calculated heat load of each module of the experiment. The thermosyphon will be bolted to a cold plate from which detector strings will hang. The thermal conductivity of a mockup of the MJD bolted thermal joint is experimentally determined to be below 0.1 K/W.

  9. Natural gas treatment process using PTMSP membrane

    DOE Patents [OSTI]

    Toy, L.G.; Pinnau, I.

    1996-03-26T23:59:59.000Z

    A process is described for separating C{sub 3}+ hydrocarbons, particularly propane and butane, from natural gas. The process uses a poly(trimethylsilylpropyne) membrane. 6 figs.

  10. Natural gas treatment process using PTMSP membrane

    DOE Patents [OSTI]

    Toy, Lora G. (San Francisco, CA); Pinnau, Ingo (Palo Alto, CA)

    1996-01-01T23:59:59.000Z

    A process for separating C.sub.3 + hydrocarbons, particularly propane and butane, from natural gas. The process uses a poly(trimethylsilylpropyne) membrane.

  11. Propane Vehicle and Infrastructure Codes and Standards Citations (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2010-07-01T23:59:59.000Z

    This document lists codes and standards typically used for U.S. propane vehicle and infrastructure projects.

  12. Evolutionary History of a Specialized P450 Propane Monooxygenase

    E-Print Network [OSTI]

    Arnold, Frances H.

    Evolutionary History of a Specialized P450 Propane Monooxygenase Rudi Fasan1 , Yergalem T hydroxylase (P450BM3) to a laboratory-evolved P450 propane mono- oxygenase (P450PMO) having 20 heme domain substrate range and the emergence of propane activity. In contrast, refinement of the enzyme catalytic

  13. Estimation of Cosmic Induced Contamination in Ultra-low Background Detector Materials

    SciTech Connect (OSTI)

    Aguayo Navarrete, Estanislao; Kouzes, Richard T.; Orrell, John L.; Berguson, Timothy J.; Greene, Austen T.

    2012-08-01T23:59:59.000Z

    Executive Summary This document presents the result of investigating a way to reliably determine cosmic induced backgrounds for ultra-low background materials. In particular, it focuses on those radioisotopes produced by the interactions with cosmic ray particles in the detector materials that act as a background for experiments looking for neutrinoless double beta decay. This investigation is motivated by the desire to determine background contributions from cosmic ray activation of the electroformed copper that is being used in the construction of the MAJORANA DEMONSTRATOR. The most important radioisotope produced in copper that contributes to the background budget is 60Co, which has the potential to deposit energy in the region of interest of this experiment. Cobalt-60 is produced via cosmic ray neutron collisions in the copper. This investigation aims to provide a method for determining whether or not the copper has been exposed to cosmic radiation beyond the threshold which the Majorana Project has established as the maximum exposure. This threshold is set by the Project as the expected contribution of this source of background to the overall background budget. One way to estimate cosmic ray neutron exposure of materials on the surface of the Earth is to relate it to the cosmic ray muon exposure. Muons are minimum-ionizing particles and the available technologies to detect muons are easier to implement than those to detect neutrons. We present the results of using a portable, ruggedized muon detector, the µ-Witness made by our research group, for determination of muon exposure of materials for the MAJORANA DEMONSTRATOR. From the muon flux measurement, this report presents a method to estimate equivalent sea-level exposure, and then infer the neutron exposure of the tracked material and thus the cosmogenic activation of the copper. This report combines measurements of the muon flux taken by the µ-Witness detector with Geant4 simulations in order to assure our understanding of the µ-Witness prototype. As a proof of concept, we present the results of using this detector with electroformed copper during its transport from Pacific Northwest National Laboratory, where the copper is grown, to the underground lab in Lead, South Dakota, where the experiment is being deployed. The development of a code to be used with the Majorana parts tracking database, designed to aid in estimating the cosmogenic activation, is also presented.

  14. Ultra-low emittance beam generation using two-color ionization injection in a CO2 laser-driven plasma accelerator

    E-Print Network [OSTI]

    Schroeder, C B; Bulanov, S S; Chen, M; Esarey, E; Geddes, C G R; Vay, J -L; Yu, L -L; Leemans, W P

    2015-01-01T23:59:59.000Z

    Ultra-low emittance (tens of nm) beams can be generated in a plasma accelerator using ionization injection of electrons into a wakefield. An all-optical method of beam generation uses two laser pulses of different colors. A long-wavelength drive laser pulse (with a large ponderomotive force and small peak electric field) is used to excite a large wakefield without fully ionizing a gas, and a short-wavelength injection laser pulse (with a small ponderomotive force and large peak electric field), co-propagating and delayed with respect to the pump laser, to ionize a fraction of the remaining bound electrons at a trapped wake phase, generating an electron beam that is accelerated in the wake. The trapping condition, the ionized electron distribution, and the trapped bunch dynamics are discussed. Expressions for the beam transverse emittance, parallel and orthogonal to the ionization laser polarization, are presented. An example is shown using a 10-micron CO2 laser to drive the wake and a frequency-doubled Ti:Al2...

  15. Portland Public School Children Move with Propane

    SciTech Connect (OSTI)

    Not Available

    2004-04-01T23:59:59.000Z

    This 2-page Clean Cities fact sheet describes the use of propane as a fuel source for Portland Public Schools' fleet of buses. It includes information on the history of the program, along with contact information for the local Clean Cities Coordinator and Portland Public Schools.

  16. SCADA system aids BGE`s Notch Cliff propane-air facility

    SciTech Connect (OSTI)

    Miller, B.A. [Baltimore Gas and Electric Co., MD (United States)

    1997-02-01T23:59:59.000Z

    SCADA systems in the natural gas industry are commonly associated with distribution networks and transmission pipelines. There is however, another application for SCADA technology that is increasingly being utilized in the industry. By implementing automation technology and process control concepts more typically associated with industrial and petrochemical process facilities, Baltimore Gas and Electric Co. (BGE) has significantly improved the efficiency, performance, and safety at its Notch Cliff Propane-Air peak shaving facility. These results have contributed to BGE`s ongoing efforts to effectively operate in the competitive energy marketplace. When the Notch Cliff plant was built in the early 1960s, it was a state-of-the-art facility. The plant blends propane vapor and compressed air to create a supplement to the natural gas supply during peak demand periods.

  17. Automatic isochoric apparatus for PVT and phase equilibrium studies of natural gas mixtures

    E-Print Network [OSTI]

    Zhou, Jingjun

    2009-05-15T23:59:59.000Z

    ........................................................................................ 51 RESULTS AND DISCUSSION .................................................................................... 54 Carbon Dioxide and Propane Measurement........................................................... 54 91% Methane Natural Gas... 94% Methane Natural Gas ..................................................................................... 65 Phase Boundary....................................................................................... 65...

  18. Application methods and evaluations of ultra-low-volume sprays for controlling the bollworm, tobacco budworm and boll weevil 

    E-Print Network [OSTI]

    Nemec, Stanley Joseph

    1967-01-01T23:59:59.000Z

    Xgof e ~ ~ ~ ~ o e ~ F e o ~ The ultra-low volume methos of epplyieg insecticises proviaes egricxxlture sag puhiid health with 8 technique for the eppR. Ication oi' insecticides that presentlp appears to be as efficient 886 more edeoomicel then e... wes oh- teixxeg with technical ~thion upping bp aircraft at rates es low as 6 fluM ounces per cere. The ultra-los-volume msthog of s~ insedticQles has since ethueietel sxxch interest for possible uee in control of insects attaching msgr cxops...

  19. An analysis of US propane markets, winter 1996-1997

    SciTech Connect (OSTI)

    NONE

    1997-06-01T23:59:59.000Z

    In late summer 1996, in response to relatively low inventory levels and tight world oil markets, prices for crude oil, natural gas, and products derived from both began to increase rapidly ahead of the winter heating season. Various government and private sector forecasts indicated the potential for supply shortfalls and sharp price increases, especially in the event of unusually severe winter weather. Following a rapid runup in gasoline prices in the spring of 1996, public concerns were mounting about a possibly similar situation in heating fuels, with potentially more serious consequences. In response to these concerns, the Energy Information Administration (EIA) participated in numerous briefings and meetings with Executive Branch officials, Congressional committee members and staff, State Energy Offices, and consumers. EIA instituted a coordinated series of actions to closely monitor the situation and inform the public. This study constitutes one of those actions: an examination of propane supply, demand, and price developments and trends.

  20. Effect of propane-air on NGVs and vehicle fueling stations. Topical report, January 1-October 1, 1993

    SciTech Connect (OSTI)

    Liss, W.E.; Moulton, D.S.

    1994-06-01T23:59:59.000Z

    Propane-air (P/A) peakshaving is an important element of peak-load management for some U.S. gas utilities. P/A is used as a supplemental energy medium with natural gas and has been shown to operate satisfactorily in most natural gas applications. The propane levels injected are compatible with the pressures (under 200 psig) and temperatures (over 40 F) found in utility distribution networks. However, P/A can create problems for natural gas vehicles (NGVs) operating on compressed gas as well as NGV fueling stations. This report contains information on P/A peakshaving and its compatibility with NGVs by documenting condensation impacts at nine conditions--i.e., three propane levels and three temperatures. These data portray the depressurization of a vehicle tank, an area selected because it illustrates NGV operation and can discriminate between acceptable and potentially non-acceptable operating points. These analyses show, not surprisingly, a correlation exists between propane level, ambient temperature, and condensation.

  1. Photoinduced nucleation: a novel tool for detecting molecules in air at ultra-low concentrations

    DOE Patents [OSTI]

    Katz, Joseph L. (Baltimore, MD); Lihavainen, Heikki (Masala, FI); Rudek, Markus M. (Bruchkoebel, DE); Salter, Brian C. (New Market, MD)

    2002-01-01T23:59:59.000Z

    A method and apparatus for determining the presence of molecules in a gas at concentrations of less than about 100 ppb. Light having wavelengths in the range from about 200 nm to about 350 nm is used to illuminate a flowing sample of the gas causing the molecules if present to form clusters. A mixture of the illuminated gas and a vapor is cooled until the vapor is supersaturated so that there is a small rate of homogeneous nucleation. The supersaturated vapor condenses on the clusters thus causing the clusters to grow to a size sufficient to be counted by light scattering and then the clusters are counted.

  2. 5/28/10 3:40 PMNSF Funds Ultra-Low Energy Circuits | The Fu Foundation School of Engineering & Applied Science -Columbia University Page 1 of 1http://www.engineering.columbia.edu/nsf-funds-microelectronic-systems-research

    E-Print Network [OSTI]

    Yang, Junfeng

    5/28/10 3:40 PMNSF Funds Ultra-Low Energy Circuits | The Fu Foundation School of Engineering://www.engineering.columbia.edu/nsf-funds-microelectronic-systems-research Columbia University Home Directory | Help NSF Funds Ultra-Low Energy Circuits (http://www.compeng.columbia.edu/) . The grant will fund their proposal to perform research in ultra low-power microelectronic systems, which

  3. * email: nidhi@ece.ucsb.edu phone: +1-805-893-3812 ext 202 Ultra-low contact resistance for Self-aligned HEMT structures on N-polar GaN by MBE

    E-Print Network [OSTI]

    Rodwell, Mark J. W.

    * email: nidhi@ece.ucsb.edu phone: +1-805-893-3812 ext 202 Ultra-low contact resistance for SelfN) are regrown to achieve ultra-low Ohmic contact resistance. All MBE regrowths were done on MOCVD GaN templates of InN. To summarize, ultra-low Ohmic contact resistance of 60 -µm was obtained for a self-aligned devi

  4. Well Performance Analysis for Low to Ultra-low Permeability Reservoir Systems

    E-Print Network [OSTI]

    Ilk, Dilhan

    2010-10-12T23:59:59.000Z

    Unconventional reservoir systems can best be described as petroleum (oil and/or gas) accumulations which are difficult to be characterized and produced by conventional technologies. In this work we present the development of a systematic procedure...

  5. Hydrolyzed Polyacrylamide- Polyethylenimine- Dextran Sulfate Polymer Gel System as a Water Shut-Off Agent in Unconventional Gas Reservoirs

    E-Print Network [OSTI]

    Jayakumar, Swathika 1986-

    2012-07-09T23:59:59.000Z

    Technologies such as horizontal wells and multi-stage hydraulic fracturing have made ultra-low permeability shale and tight gas reservoirs productive but the industry is still on the learning curve when it comes to addressing various production...

  6. Table 49. Prime Supplier Sales Volumes of Aviation Fuels, Propane...

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    Marketing Annual 1999 Table 49. Prime Supplier Sales Volumes of Aviation Fuels, Propane, and Residual Fuel Oil by PAD District and State (Thousand Gallons per Day) -...

  7. Table 49. Prime Supplier Sales Volumes of Aviation Fuels, Propane...

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    See footnotes at end of table. 49. Prime Supplier Sales Volumes of Aviation Fuels, Propane, and Residual Fuel Oil by PAD District and State 386 Energy Information...

  8. Table 49. Prime Supplier Sales Volumes of Aviation Fuels, Propane...

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    Marketing Annual 1995 Table 49. Prime Supplier Sales Volumes of Aviation Fuels, Propane, and Residual Fuel Oil by PAD District and State (Thousand Gallons per Day) -...

  9. Table 49. Prime Supplier Sales Volumes of Aviation Fuels, Propane...

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    Marketing Annual 1998 Table 49. Prime Supplier Sales Volumes of Aviation Fuels, Propane, and Residual Fuel Oil by PAD District and State (Thousand Gallons per Day) -...

  10. Microsoft Word - Joe Rose - Providence remarks.propane.JUR -...

    Broader source: Energy.gov (indexed) [DOE]

    for propane consumers in acquiring adequate supply at affordable prices. Crop drying demand of 500% of last year's demand combined with heating demand of 20% above the...

  11. Impact of Natural Gas Appliances on Pollutant Levels in California Homes

    E-Print Network [OSTI]

    Mullen, Nasim A.

    2014-01-01T23:59:59.000Z

    be combined with storage WH) N N N Propane Don't know/blan kstorage water heater) __ Other (describe) K.2 Is this water heater powered by natural gas, electricity or propane? [Propane __ Electric! Skip to §L K.3 Do you have more than one storage

  12. Winter fuels report, week ending February 12, 1993. [Contains Glossary and feature article on Midwest Propane Markets

    SciTech Connect (OSTI)

    Not Available

    1993-02-18T23:59:59.000Z

    The Winter Fuels Report is intended to provide concise, timely information to the industry, the press, policymakers, consumers, analysts, and State and local governments on the following topics: Distillate fuel oil net production, imports and stocks on a US level and for all Petroleum Administration for Defense Districts (PADD) and product supplied on a US level; propane net production, imports and stocks on a US level and for PADD's 1, II, and III; natural gas supply and disposition and underground storage for the US and consumption for all PADD'S; as well as selected National average prices. Residential and wholesale pricing data for heating oil and propane for those States participating in the joint Energy Information Administration (EIA)/State Heating Oil and Propane Program; selected cities; and a 6--10 Day, 30-Day, and 90-Day outlook for temperature and precipitation and US total heating degree-days by city.

  13. First search for double beta decay of platinum by ultra-low background HP Ge gamma spectrometry

    E-Print Network [OSTI]

    P. Belli; R. Bernabei; F. Cappella; R. Cerulli; F. A. Danevich; A. Di Marco; A. Incicchitti; M. Laubenstein; S. S. Nagorny; S. Nisi; O. G. Polischuk; V. I. Tretyak

    2011-04-29T23:59:59.000Z

    A search for double beta processes in 190Pt and 198Pt was realized with the help of ultra-low background HP Ge 468 cm^3 gamma spectrometer in the underground Gran Sasso National Laboratories of the INFN (Italy). After 1815 h of data taking with 42.5 g platinum sample, T_{1/2} limits on 2beta processes in 190Pt (\\epsilon\\beta^+ and 2\\epsilon) have been established on the level of 10^{14}-10^{16} yr, 3 to 4 orders of magnitude higher than those known previously. In particular, a possible resonant double electron capture in 190Pt was restricted on the level of 2.9 \\times 10^{16} yr at 90% C.L. In addition, T_{1/2} limit on 2 beta^- decay of 198Pt (2\

  14. Plasticity and ultra-low stress induced twin boundary migration in nanotwinned Cu by in situ nanoindentation studies

    SciTech Connect (OSTI)

    Liu, Y.; Chen, Y. [Department of Materials Science and Engineering, Texas A and M University, College Station, Texas 77843 (United States); Jian, J. [Department of Electrical Engineering, Texas A and M University, College Station, Texas 77843 (United States); Wang, H. [Department of Materials Science and Engineering, Texas A and M University, College Station, Texas 77843 (United States); Department of Electrical Engineering, Texas A and M University, College Station, Texas 77843 (United States); Zhang, X., E-mail: zhangx@tamu.edu [Department of Materials Science and Engineering, Texas A and M University, College Station, Texas 77843 (United States); Department of Mechanical Engineering, Texas A and M University, College Station, Texas 77843 (United States)

    2014-06-09T23:59:59.000Z

    Nanotwinned metals have rare combinations of mechanical strength and ductility. Previous studies have shown that detwinning occurs in plastically deformed nanotwinned metals. Although molecular dynamics simulations have predicted that fine nanotwins can migrate at low stress, there is little in situ evidence to validate such predictions. Also it is unclear if detwinning occurs prior to or succeeding plastic yielding. Here, by using in situ nanoindentation in a transmission electron microscope, we show that a non-elastic detwinning process in nanotwinned Cu occurred at ultra-low indentation stress (0.1?GPa), well before the stress necessary for plastic yielding. Furthermore, the in situ nanoindentation technique allows us to differentiate dislocation-nucleation dominated microscopic yielding preceding macroscopic yielding manifested by dislocation-transmission through twin boundaries. This study thus provides further insights for understanding plasticity in nanotwinned metals at microscopic levels.

  15. First search for double beta decay of platinum by ultra-low background HP Ge gamma spectrometry

    E-Print Network [OSTI]

    Belli, P; Cappella, F; Cerulli, R; Danevich, F A; Di Marco, A; Incicchitti, A; Laubenstein, M; Nagorny, S S; Nisi, S; Polischuk, O G; Tretyak, V I

    2011-01-01T23:59:59.000Z

    A search for double beta processes in 190Pt and 198Pt was realized with the help of ultra-low background HP Ge 468 cm^3 gamma spectrometer in the underground Gran Sasso National Laboratories of the INFN (Italy). After 1815 h of data taking with 42.5 g platinum sample, T_{1/2} limits on 2beta processes in 190Pt (\\epsilon\\beta^+ and 2\\epsilon) have been established on the level of 10^{14}-10^{16} yr, 3 to 4 orders of magnitude higher than those known previously. In particular, a possible resonant double electron capture in 190Pt was restricted on the level of 2.9 \\times 10^{16} yr at 90% C.L. In addition, T_{1/2} limit on 2 beta^- decay of 198Pt (2\

  16. Kinetics and Mechanism of Oxidative Dehydrogenation of Propane on Vanadium, Molybdenum, and Tungsten Oxides

    E-Print Network [OSTI]

    Iglesia, Enrique

    Kinetics and Mechanism of Oxidative Dehydrogenation of Propane on Vanadium, Molybdenum catalysts confirmed that oxidative dehydrogenation of propane occurs via similar pathways, which involve for propane dehydrogenation and for propene combustion increase in the sequence VOx/ZrO2

  17. CONTRIBUTION A L'TUDE DES FLAMMES D'HYDROCARBURES. PROPANE ET ACTYLNE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    CONTRIBUTION A L'ÉTUDE DES FLAMMES D'HYDROCARBURES. PROPANE ET ACÉTYLÈNE Par MM. JEAN VAN DER POLL du propane et de l'acétylène qui ont montré que, dans certains cas, les flammes oxy-propane et oxy

  18. Effect of catalyst structure on oxidative dehydrogenation of ethane and propane on alumina-supported vanadia

    E-Print Network [OSTI]

    Argyle, Morris D.; Chen, Kaidong; Bell, Alexis T.; Iglesia, Enrique

    2001-01-01T23:59:59.000Z

    catalysts: (a) ethane ODH, (b) propane ODH (663 K, 14 kPa CDehydrogenation of Ethane and Propane on Alumina-Supporteddehydrogenation of ethane and propane. UV-visible and Raman

  19. Micro-Mixing Lean-Premix System for Ultra-Low Emission Hydrogen/Syngas Combustion

    SciTech Connect (OSTI)

    Erlendur Steinthorsson; Brian Hollon; Adel Mansour

    2010-06-30T23:59:59.000Z

    The focus of this project was to develop the next generation of fuel injection technologies for environmentally friendly, hydrogen syngas combustion in gas turbine engines that satisfy DOE's objectives of reducing NOx emissions to 3 ppm. Building on Parker Hannifin's proven Macrolamination technology for liquid fuels, Parker developed a scalable high-performing multi-point injector that utilizes multiple, small mixing cups in place of a single conventional large-scale premixer. Due to the small size, fuel and air mix rapidly within the cups, providing a well-premixed fuel-air mixture at the cup exit in a short time. Detailed studies and experimentation with single-cup micro-mixing injectors were conducted to elucidate the effects of various injector design attributes and operating conditions on combustion efficiency, lean stability and emissions and strategies were developed to mitigate the impact of flashback. In the final phase of the program, a full-scale 1.3-MWth multi-cup injector was built and tested at pressures from 6.9bar (100psi) to 12.4bar (180psi) and flame temperatures up to 2000K (3150 F) using mixtures of hydrogen and natural gas as fuel with nitrogen and carbon dioxide as diluents. The injector operated without flash back on fuel mixtures ranging from 100% natural gas to 100% hydrogen and emissions were shown to be insensitive to combustor pressure. NOx emissions of 3-ppm were achieved at a flame temperature of 1750K (2690 F) when operating on a fuel mixture containing 50% hydrogen and 50% natural gas by volume with 40% nitrogen dilution and 1.5-ppm NOx was achieved at a flame temperature of 1680K (2564 F) using only 10% nitrogen dilution. NOx emissions of 3.5-ppm were demonstrated at a flame temperature of 1730K (2650 F) with only 10% carbon dioxide dilution. Finally, 3.6-ppm NOx emissions were demonstrated at a flame temperature over 1600K (2420 F) when operating on 100% hydrogen fuel with 30% carbon dioxide dilution. Superior operability was demonstrated for the hydrogen-natural gas fuel. The micro-mixing fuel injectors show great promise for use in future gas turbine engines operating on hydrogen, syngas or other fuel mixtures of various compositions, supporting the Department of Energy goals related to increased energy diversity while reducing greenhouse gases.

  20. Liquid Propane Injection Applications | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment ofLetterEconomy and EmissionsDepartment of EnergyLiquid propane

  1. Residential propane price decreases slightly decreases slightly

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade Year-0E (2001) -heating oil pricepropane price05, 2014propane price7,

  2. Alternative Fuels Data Center: Propane Related Links

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduceNewPropane Printable Version Share this

  3. 1500 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: REGULAR PAPERS, VOL. 54, NO. 7, JULY 2007 An Ultra-Low-Power Long Range Battery/Passive

    E-Print Network [OSTI]

    Hochberg, Michael

    ); this novel dual passive and battery operation allays one of the major drawbacks of currently available active-power circuit design techniques. At 915 MHz, based on the experimentally measured tag impedance (92-j837 An Ultra-Low-Power Long Range Battery/Passive RFID Tag for UHF and Microwave Bands With a Current

  4. An Ultra Low Power System Architecture for Sensor Network Applications Mark Hempstead, Nikhil Tripathi, Patrick Mauro, Gu-Yeon Wei, David Brooks

    E-Print Network [OSTI]

    Hempstead, Mark

    An Ultra Low Power System Architecture for Sensor Network Applications Mark Hempstead, Nikhil" of this design space is a truly untethered device that operates off of energy scavenged from the ambient architecture. Our simulation results suggest one to two orders of magnitude reduction in power dissipation over

  5. Safety evaluation for packaging (onsite) nitrogen trailers propane tanks

    SciTech Connect (OSTI)

    Ferrell, P.C.

    1998-01-28T23:59:59.000Z

    The purpose of the Safety Evaluation for Packaging (SEP) is the evaluation and authorization of the onsite transport of propane tanks that are mounted on the Lockheed Martin Hanford Corporation Characterization Project`s nitrogen trailers. This SEP authorizes onsite transport of the nitrogen trailers, including the propane tanks, until May 31, 1998. The three nitrogen trailers (HO-64-4966, HO-64-4968, and HO-64-5170) are rated for 1,361 kg (30,000 lb) and are equipped with tandem axles and pintel hitches. Permanently mounted on each trailer is a 5,678 L (1,500 gal) cryogenic dewar that is filled with nitrogen, and a propane fired water bath vaporizer system, and a 454 L (1 20 gal) propane tank. The nitrogen trailer system is operated only when it is disconnected from the tow vehicle and is leveled and stabilized. When the trailers are transported, the propane tanks are isolated via closed supply valves.

  6. Advanced Micro Turbine System (AMTS) -C200 Micro Turbine -Ultra-Low Emissions Micro Turbine

    SciTech Connect (OSTI)

    Capstone Turbine Corporation

    2007-12-31T23:59:59.000Z

    In September 2000 Capstone Turbine Corporation commenced work on a US Department of Energy contract to develop and improve advanced microturbines for power generation with high electrical efficiency and reduced pollutants. The Advanced MicroTurbine System (AMTS) program focused on: (1) The development and implementation of technology for a 200 kWe scale high efficiency microturbine system (2) The development and implementation of a 65 kWe microturbine which meets California Air Resources Board (CARB) emissions standards effective in 2007. Both of these objectives were achieved in the course of the AMTS program. At its conclusion prototype C200 Microturbines had been designed, assembled and successfully completed field demonstration. C65 Microturbines operating on natural, digester and landfill gas were also developed and successfully tested to demonstrate compliance with CARB 2007 Fossil Fuel Emissions Standards for NOx, CO and VOC emissions. The C65 Microturbine subsequently received approval from CARB under Executive Order DG-018 and was approved for sale in California. The United Technologies Research Center worked in parallel to successfully execute a RD&D program to demonstrate the viability of a low emissions AMS which integrated a high-performing microturbine with Organic Rankine Cycle systems. These results are documented in AMS Final Report DOE/CH/11060-1 dated March 26, 2007.

  7. Michigan residential heating oil and propane price survey: 1995--1996 heating season. Final report

    SciTech Connect (OSTI)

    Moriarty, C.

    1996-05-01T23:59:59.000Z

    This report summarizes the results of a survey of residential No. 2 distillate fuel (home heating oil) and liquefied petroleum gas (propane) prices over the 1995--1996 heating season in Michigan. The Michigan`s Public Service Commission (MPSC) conducted the survey under a cooperative agreement with the US Department of Energy`s (DOE) Energy Information Administration (EIA). This survey was funded in part by a grant from the DOE. From October 1995 through March 1996, the MPSC surveyed participating distributors by telephone for current residential retail home heating oil and propane prices. The MPSC transmitted the data via a computer modem to the EIA using the Petroleum Electronic Data Reporting Option (PEDRO). Survey results were published in aggregate on the MPSC World Wide Web site at http://ermisweb.state.mi.us/shopp. The page was updated with both residential and wholesale prices immediately following the transmission of the data to the EIA. The EIA constructed the survey using a sample of Michigan home heating oil and propane retailers. The sample accounts for different sales volumes, geographic location, and sources of primary supply.

  8. Enduring use of city gas keeps N. H. utility reminiscent of a simpler age

    SciTech Connect (OSTI)

    Not Available

    1991-01-01T23:59:59.000Z

    This article reports on a gas distribution company which produces and pipes a propane/air mixture. The distribution of this mixture is detailed.

  9. An ultra low-noise AC beam transformer and digital signal processing system for CERN's ELENA ring

    E-Print Network [OSTI]

    Angoletta, M E; Caspers, F; Federmann, S; Molendijk, J; Pedersen, F; Sanchez-Quesada, J

    2013-01-01T23:59:59.000Z

    CERN’s Extra Low ENergy Antiproton (ELENA) ring is a new synchrotron that will be commissioned in 2016 to further decelerate the antiprotons coming from CERN’s Antiproton Decelerator (AD). Essential longitudinal diagnostics required for commissioning and operation include the intensity measurement for bunched and debunched beams and the measurement of p/p for debunched beams to assess the electron cooling performance. The beam phase information is also needed by the Low-Level RF (LLRF) system. The baseline system for providing the required beam parameters and signals is based upon two ultra-low-noise AC beam transformers and associated digital signal processing. The AC beam transformers cover different frequency regions and are an adaptation to the ELENA layout of those used in the AD. Two AC beam transformers will also be installed in the extraction lines to provide beam intensity measurements. The digital signal processing will be carried out with the leadingedge hardware family used for ELENA’s L...

  10. Navy Mobility Fuels Forecasting System Phase 5 report: Impacts of ultra low sulfur diesel fuel production on Navy fuel availability

    SciTech Connect (OSTI)

    Hadder, G.R.; Das, S.; Lee, R.; Domingo, N.; Davis, R.M.

    1989-09-01T23:59:59.000Z

    Legislation for ultra low sulfur (ULS) diesel fuel, with a greatly reduced allowable sulfur content and a new limit on aromatics content, is expected to be in place by 1995. The ULS diesel fuel has been specified to satisfy national standards for particulate emissions from heavy-duty diesel engines. The economic and engineering models of the Navy Mobility Fuels Forecasting System have been used to study the impacts of ULS diesel fuel production on other refined petroleum products, with emphasis on the quality of Navy mobility fuels. The study predicts that to produce ULS diesel fuel, Gulf and West Coast refiners will have to invest about $4.4 billion in new processing capacity. Refiners will shift aromatics from No. 2 diesel fuel to jet fuel and to No. 2 fuel oil. Therefore, particulate emissions could be transferred from the nation's highways to the airways and to communities which use No. 2 fuel oil for residential and commercial heating. The study also predicts that there will be an increase in the aromatics content of domestically produced Navy JP-5 jet fuel and F-76 marine diesel fuel. The gum-forming tendencies of F-76 an F-77 burner fuel oil will increase in most cases. The freezing point of JP-5 will improve. There will be minor changes in the cost of JP-5, but sizable reductions in the cost of F-76 and F-77. 20 refs., 2 figs., 17 tabs.

  11. Integrated production/use of ultra low-ash coal, premium liquids and clean char. [Quarterly] report, December 1, 1991--February 29, 1992

    SciTech Connect (OSTI)

    Kruse, C.W. [Illinois State Geological Survey, Champaign, IL (United States)

    1992-08-01T23:59:59.000Z

    The first step in the integrated, mufti-product approach for utilizing Illinois coal is the production of ultra low-ash coal. Subsequent steps convert low-ash coal to high-value, coal-derived, products. The ultra low-ash coal is produced by solubilizing coal in a phenolic solvent under ChemCoal{trademark} process conditions, separating the coal solution from insoluble ash, and then precipitating the clean coal by dilution of the solvent with methanol. Two major products, liquids and low-ash char, are then produced by mild gasification of the low-ash coal. The low ash-char is further upgraded to activated char, and/or an oxidized activated char which has catalytic properties. Characterization of products at each stage is part of this project.

  12. Integrated production/use of ultra low-ash coal, premium liquids and clean char. Technical report, September 1, 1991--November 30, 1991

    SciTech Connect (OSTI)

    Kruse, C.W.

    1991-12-31T23:59:59.000Z

    This integrated, multi-product approach for utilizing Illinois coal starts with the production of ultra low-ash coal and then converts it to high-vale, coal-derived, products. The ultra low-ash coal is produced by solubilizing coal in a phenolic solvent under ChemCoal{trademark} process conditions, separating the coal solution from insoluble ash, and then precipitating the clean coal by dilution of the solvent with methanol. Two major products, liquids and low-ash char, are then produced by mild gasification of the low-ash coal. The low ash-char is further upgraded to activated char, and/or an oxidized activated char which has catalytic properties. Characterization of products at each stage is part of this project.

  13. Can propane school buses save money and provide other benefits...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Can propane school buses save money and provide other benefits? October 1, 2014 Tweet EmailPrint School districts across the country are looking for ways to save money and be more...

  14. VEE-0040- In the Matter of Western Star Propane, Inc.

    Broader source: Energy.gov [DOE]

    On February 18, 1997, Western Star Propane, Inc. (Western) filed an Application for Exception with the Office of Hearings and Appeals (OHA) of the Department of Energy (DOE). In its application,...

  15. VEE-0060- In the Matter of Blakeman Propane, Inc.

    Broader source: Energy.gov [DOE]

    On May 11, 1999, Blakeman Propane, Inc. (Blakeman) of Moorcroft, Wyoming, filed an Application for Exception with the Office of Hearings and Appeals (OHA) of the Department of Energy (DOE). In its...

  16. Residential home heating oil and propane survey, 1991--1992

    SciTech Connect (OSTI)

    Not Available

    1992-05-01T23:59:59.000Z

    This report contains pricing and consumption data on heating oils and propane for the Maine residential sector during the heating season 1991--1992. The information was gathered by survey. (VC)

  17. Conservation Research and Development/ New Ultra-Low Carbon High Strength Steels with Improved Bake Hardenability for Enhanced Stretch Formability and Dent Resistance

    SciTech Connect (OSTI)

    Anthony J. DeArdo; C. Isaac Garcia

    2003-12-15T23:59:59.000Z

    Conservation Research and Development/New Ultra-Low Carbon High Strength Steels with Improved Bake Hardenability for Enhanced Stretch Formability and Dent Resistance. The experimental work can be divided into four phases. In each phase, the materials were received or designed, processed and tested, to evaluate the BH increment or response, as a function of compositions and processing conditions. Microstructural characterization by various techniques was performed in order to gain insights into the mechanisms of flow stress increment by bake hardening.

  18. Series 50 propane-fueled Nova bus: Engine development, installation, and field trials

    SciTech Connect (OSTI)

    Smith, B.

    1999-01-01T23:59:59.000Z

    The report describes a project to develop the Detroit Diesel series 50 liquefied propane gas (LPG) heavy-duty engine and to conduct demonstrations of LPG-fuelled buses at selected sites (Halifax Regional Municipality and three sites in the United States). The project included five main elements: Engine development and certification, chassis re-engineering and engine installation, field demonstration, LPG fuel testing, and LPG fuel variability testing. Lessons learned with regard to engine design and other issues are discussed, and recommendations are made for further development and testing.

  19. An Ultra-Low Noise Telecom Wavelength Free Running Single Photon Detector Using Negative Feedback Avalanche Diode

    E-Print Network [OSTI]

    Zhizhong Yan; Deny R. Hamel; Aimee K. Heinrichs; Xudong Jiang; Mark A. Itzler; Thomas Jennewein

    2012-05-31T23:59:59.000Z

    It is challenging to implement genuine free running single photon detectors for the 1550 nm wavelength range with simultaneously high detection efficiency (DE), low dark noise, and good time resolution. We report a novel read out system for the signals from a negative feedback avalanche diode (NFAD) which allows useful operation of these devices at a temperature of 193 K and results in very low dark counts (~100 CPS), good time jitter (~30 ps), and good DE (~10%). We characterized two NFADs with a time correlation method using photons generated from weak coherent pulses (WCP) and photon pairs produced by spontaneous parametric down conversion (SPDC). The inferred detector efficiencies for both types of photon sources agree with each other. The best noise equivalent power of the device is estimated to be 8.1 x 10^(-18) W Hz^(-1/2), more than 10 times better than typical InP/InGaAs SPADs show in free running mode. The afterpulsing probability was found to be less than 0.1% per ns at the optimized operating point. In addition, we studied the performance of an entanglement-based quantum key distribution (QKD) using these detectors and develop a model for the quantum bit error rate (QBER) that incorporates the afterpulsing coefficients. We verified experimentally that using these NFADs it is feasible to implement QKD over 400 km of telecom fibre. Our NFAD photon detector system is very simple, and is well suited for single-photon applications where ultra-low noise and free-running operation is required, and some afterpulsing can be tolerated.

  20. Full Useful Life (120,000 miles) Exhaust Emission Performance of a NOx Adsorber and Diesel Particle Filter Equipped Passenger Car and Medium-duty Engine in Conjunction with Ultra Low Sulfur Fuel (Presentation)

    SciTech Connect (OSTI)

    Thornton, M.; Tatur, M.; Tomazic, D.; Weber, P.; Webb, C.

    2005-08-25T23:59:59.000Z

    Discusses the full useful life exhaust emission performance of a NOx (nitrogen oxides) adsorber and diesel particle filter equipped light-duty and medium-duty engine using ultra low sulfur diesel fuel.

  1. Southeast Propane AutoGas Development Program | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideo »UsageSecretaryVideos Solid-State LightingSouth CarolinaEnergy2 DOE

  2. Southeast Propane AutoGas Development Program | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideo »UsageSecretaryVideos Solid-State LightingSouth CarolinaEnergy2 DOE1

  3. Southeast Propane AutoGas Development Program | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideo »UsageSecretaryVideos Solid-State LightingSouth CarolinaEnergy2 DOE10

  4. Comparison of propane and methane performance and emissions in a turbocharged direct injection dual fuel engine

    SciTech Connect (OSTI)

    Gibson, C. M.; Polk, A. C.; Shoemaker, N. T.; Srinivasan, K. K.; Krishnan, S. R.

    2011-04-20T23:59:59.000Z

    With increasingly restrictive NO x and particulate matter emissions standards, the recent discovery of new natural gas reserves, and the possibility of producing propane efficiently from biomass sources, dual fueling strategies have become more attractive. This paper presents experimental results from dual fuel operation of a four-cylinder turbocharged direct injection (DI) diesel engine with propane or methane (a natural gas surrogate) as the primary fuel and diesel as the ignition source. Experiments were performed with the stock engine control unit at a constant speed of 1800 rpm, and a wide range of brake mean effective pressures (BMEPs) (2.7-11.6 bars) and percent energy substitutions (PESs) of C 3 H 8 and CH 4. Brake thermal efficiencies (BTEs) and emissions (NO x, smoke, total hydrocarbons (THCs), CO, and CO 2) were measured. Maximum PES levels of about 80-95% with CH 4 and 40-92% with C 3 H 8 were achieved. Maximum PES was limited by poor combustion efficiencies and engine misfire at low loads for both C 3 H 8 and CH 4, and the onset of knock above 9 bar BMEP for C 3 H 8. While dual fuel BTEs were lower than straight diesel BTEs at low loads, they approached diesel BTE values at high loads. For dual fuel operation, NO x and smoke reductions (from diesel values) were as high as 66-68% and 97%, respectively, but CO and THC emissions were significantly higher with increasing PES at all engine loads

  5. Production of olefins by oxidative dehydrogenation of propane and butane over monoliths at short contact times

    SciTech Connect (OSTI)

    Huff, M.; Schmidt, L.D. [Univ. of Minnesota, Minneapolis, MN (United States)] [Univ. of Minnesota, Minneapolis, MN (United States)

    1994-09-01T23:59:59.000Z

    The autothermal production of olefins from propane or n-butane by oxidative dehydrogenation and cracking in air or oxygen at atmospheric pressure over noble metal coated ceramic foam monoliths at contact times of {approximately}5 milliseconds has been studied. On Pt, synthesis gas (CO and H{sub 2}) dominates near its stoichiometry, while olefin production dominates at higher fuel-to-oxygen ratios. No carbon buildup is observed, and catalysts exhibit no deactivation over at least several days. On Rh, primarily synthesis gas is produced under these conditions, while on Pd, carbon deposition rapidly deactivates the catalyst. The authors observed up to 65% selectivity to olefins at nearly 100% conversion of propane or n-butane with a catalyst contact time of 5 ms. Ethylene selectivity is maximized by increasing the reaction temperature, either by preheating the reactants or by using oxygen enriched air. Propylene selectivity is maximized by lower temperature and shorter catalyst contact time. Very small amounts alkanes and higher molecular weight species are obtained, suggesting that a homogeneous pyrolysis mechanism is not occurring. A very simple reaction mechanism appears to explain the observed product distribution. Reactions are initiated by oxidative dehydrogenation of the alkane by adsorbed oxygen to form a surface alkyl. On Pt, {beta}-hydrogen and {beta}-alkyl elimination reactions of adsorbed alkyl dominate which lead to olefin production rather than cracking to C{sub s} and H{sub s}. 24 refs., 14 figs., 4 tabs.

  6. Measurements of Laminar Flame Velocity for Components of Natural Gas

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    flame velocity of components of natural gas, methane, ethane, propane, and nbutane as well as of binary% by volume (1). The laminar flame velocities of methane/air, ethane/air, and propane/air mixtures have on a plenum chamber with the radial temperature distribution measurement made by a series of thermocouples

  7. Selective dehydrogenation of propane over novel catalytic materials

    SciTech Connect (OSTI)

    Sault, A.G.; Boespflug, E.P.; Martino, A.; Kawola, J.S.

    1998-02-01T23:59:59.000Z

    The conversion of small alkanes into alkenes represents an important chemical processing area; ethylene and propylene are the two most important organic chemicals manufactured in the U.S. These chemicals are currently manufactured by steam cracking of ethane and propane, an extremely energy intensive, nonselective process. The development of catalytic technologies (e.g., selective dehydrogenation) that can be used to produce ethylene and propylene from ethane and propane with greater selectivity and lower energy consumption than steam cracking will have a major impact on the chemical processing industry. This report details a study of two novel catalytic materials for the selective dehydrogenation of propane: Cr supported on hydrous titanium oxide ion-exchangers, and Pt nanoparticles encapsulated in silica and alumina aerogel and xerogel matrices.

  8. Experimental studies of steam-propane injection for the Duri intermediate crude oil 

    E-Print Network [OSTI]

    Hendroyono, Arief

    2003-01-01T23:59:59.000Z

    Laboratory experimental studies were carried out to better understand production mechanisms involved in steam-propane injection and to investigate effects of expected field pressure and temperature conditions on steam-propane injection...

  9. Emissions from In-Use NG, Propane, and Diesel Fueled Heavy Duty...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    In-Use NG, Propane, and Diesel Fueled Heavy Duty Vehicles Emissions from In-Use NG, Propane, and Diesel Fueled Heavy Duty Vehicles Emissions tests of in-use heavy-duty vehicles...

  10. Consequences of propene and propane on plasma remediation of NOx Rajesh Doraia)

    E-Print Network [OSTI]

    Kushner, Mark

    Consequences of propene and propane on plasma remediation of NOx Rajesh Doraia) Department exhausts with hydrocarbons propane (C3H8) and propene (C3H6) has been investigated. In general

  11. Author's personal copy Unified behaviour of maximum soot yields of methane, ethane and propane

    E-Print Network [OSTI]

    Gülder, Ömer L.

    Author's personal copy Unified behaviour of maximum soot yields of methane, ethane and propane the current study and the previous measurements in similar flames with methane, ethane, and propane flames

  12. Zeolitic Imidazolate Frameworks for Kinetic Separation of Propane and David H. Olson,

    E-Print Network [OSTI]

    Li, Jing

    Zeolitic Imidazolate Frameworks for Kinetic Separation of Propane and Propene Kunhao Li, David H the first examples of MMOFs that are capable of kinetic separation of propane and propene (propylene), which

  13. Experimental studies of steam-propane injection for the Duri intermediate crude oil

    E-Print Network [OSTI]

    Hendroyono, Arief

    2003-01-01T23:59:59.000Z

    Laboratory experimental studies were carried out to better understand production mechanisms involved in steam-propane injection and to investigate effects of expected field pressure and temperature conditions on steam-propane injection...

  14. Quantum cascade laser investigations of CH4 and C2H2 interconversion in hydrocarbon/H2 gas mixtures during microwave plasma

    E-Print Network [OSTI]

    Bristol, University of

    described in Mankelevich et al. J. Appl. Phys. 104, 113304 2008 . The gas temperature distribution within source gases investigated methane, acetylene, ethane, propyne, propane, and butane are converted

  15. 217 km long distance photon-counting optical time-domain reflectometry based on ultra-low noise up-conversion single photon detector

    E-Print Network [OSTI]

    Guo-Liang Shentu; Qi-Chao Sun; Xiao Jiang; Xiao-Dong Wang; Jason S. Pelc; M. M. Fejer; Qiang Zhang; Jian-Wei Pan

    2013-08-05T23:59:59.000Z

    We demonstrate a photon-counting optical time-domain reflectometry with 42.19 dB dynamic range using an ultra-low noise up-conversion single photon detector. By employing the long wave pump technique and a volume Bragg grating, we reduce the noise of our up-conversion single photon detector, and achieve a noise equivalent power of -139.7 dBm/sqrt(Hz). We perform the OTDR experiments using a fiber of length 216.95 km, and show that our system can identify defects along the entire fiber length with a distance resolution better than 10 cm in a measurement time of 13 minutes.

  16. Ultra low noise YBa{sub 2}Cu{sub 3}O{sub 7??} nano superconducting quantum interference devices implementing nanowires

    SciTech Connect (OSTI)

    Arpaia, R. [Quantum Device Physics Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296 Göteborg (Sweden); CNR-SPIN, Dipartimento di Scienze Fisiche, Università degli Studi di Napoli “Federico II,” I-80125 Napoli (Italy); Arzeo, M.; Nawaz, S.; Charpentier, S.; Lombardi, F.; Bauch, T., E-mail: thilo.bauch@chalmers.se [Quantum Device Physics Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296 Göteborg (Sweden)

    2014-02-17T23:59:59.000Z

    We present results on ultra low noise YBa{sub 2}Cu{sub 3}O{sub 7–?} (YBCO) nano Superconducting QUantum Interference Devices (nanoSQUIDs). To realize such devices, we implemented high quality YBCO nanowires, working as weak links between two electrodes. We observe critical current modulation as a function of an externally applied magnetic field in the full temperature range below the transition temperature T{sub C}. The white flux noise below 1??{sub 0}/?(Hz) at T=8?K makes our nanoSQUIDs very attractive for the detection of small spin systems.

  17. Alternative Fuels Data Center: Propane Powers Airport Shuttles in New

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduceNew HampshirePropaneOrleans Propane

  18. Propane Vehicle and Infrastructure Codes and Standards Chart (Revised) (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-02-01T23:59:59.000Z

    This chart shows the SDOs responsible for leading the support and development of key codes and standards for propane.

  19. MATERIALS DEGRADATION ANALYSIS AND DEVELOPMENT TO ENABLE ULTRA LOW COST, WEB-PROCESSED WHITE P-OLED FOR SSL

    SciTech Connect (OSTI)

    DR. DEVIN MACKENZIE

    2011-12-13T23:59:59.000Z

    Progress over Phase II of DE-FG02-07ER86293 'Materials Degradation Analysis and Development to Enable Ultra Low Cost, Web-Processed White P-OLED for SSL' was initially rapid in terms of device performance improvements. We exceeded our device luminance lifetime goals for printed flexible white OLEDs as laid out in our project proposal. Our Phase II performance target was to demonstrate >1500 hours luminance lifetime at 100 Cd/m2 from a printed flexible device. We now have R&D devices well in excess of 8000 hrs lifetime at 100 Cd/m2, tested in air. We also were able to produce devices which met the voltage target of >1500 hours below 15V operation. After completing the initial performance milestones, we went on to focus on color-related degradation issues which were cited as important to commercialization of the technology by our manufacturing partners. We also put additional focus on cathode work as the active material development that occurred over the STTR time period required an adaptation of the cathode from the original cathode formulations which were developed based on previous generation active layer materials. We were able to improve compatibility of the cathode with some of the newer generation active layer materials and improve device yield and voltage behavior. An additional objective of the initial Phase II was to further develop the underlying manufacturing technology and real-life product specifications. This is a key requirement that must be met to ensure eventual commercialization of this DOE-funded technology. The link between commercial investment for full commercialization and R&D efforts in OLED solid State Lighting is often a large one. Add-Vision's lower cost, printed OLED manufacturing approach is an attraction, but close engagement with manufacturing partners and addressing customer specifications is a very important link. Manufacturing technology encompasses development of moisture reduction encapsulation technology, improved cost performance, and reductions in operating voltage through thinner and higher uniformity active device layers. We have now installed a pilot encapsulation system at AVI for controlled, high throughput lamination encapsulation of flexible OLEDs in a novel process. Along with this, we have developed, with our materials supply partners, adhesives, barrier films and other encapsulation materials and we are showing total air product lifetimes in the 2-4 years range from a process consistent with our throughput goals of {approx}1M device per month ({approx}30,000 sq. ft. of processed OLEDs). Within the last year of the project, we have been working to introduce the manufacturing improvements made in our LEP deposition and annealing process to our commercial partners. Based on the success of this, a pilot scale-up program was begun. During this process, Add-Vision was acquired by a strategic partner, in no small part, because of the promise of future success of the technology as evidenced by our commercial partners pilot scale-up plans. Overall, the performance, manufacturing and product work in this project has been successful. Additional analysis and device work at LBL has also shown a unique adhesion change with device bias stressing which may result from active layer polymer cross-linking during bias stressing of device. It was shown that even small bias stresses, as a fraction of a full device lifetime stress period, result in measurable chemical change in the device. Further work needs to be conducted to fully understand the chemical nature of this interaction. Elucidation of this effect would enable doped OLED formulation to be engineered to suppress this effect and further extend lifetimes and reduce voltage climb.

  20. Novel Pt/Mg(In)(Al)O catalysts for ethane and propane dehydrogenation Pingping Sun a

    E-Print Network [OSTI]

    Iglesia, Enrique

    Novel Pt/Mg(In)(Al)O catalysts for ethane and propane dehydrogenation Pingping Sun a , Georges and propane dehydrogenation reactions are strongly dependent on the bulk In/Pt ratio. For both reactants to alkene was nearly 100%. Coke deposition was observed after catalyst use for either ethane or propane

  1. A KINETIC STUDY OF AEROBIC PROPANE UPTAKE AND COMETABOLIC DEGRADATION OF CHLOROFORM,

    E-Print Network [OSTI]

    Semprini, Lewis

    A KINETIC STUDY OF AEROBIC PROPANE UPTAKE AND COMETABOLIC DEGRADATION OF CHLOROFORM, CIS the behavior of different consortiums of aerobic propane-utilizing microorganisms, with respect to both the lag time for growth after exposure to propane, and their ability to transform three chlorinated aliphatic

  2. Isotopic Tracer Studies of Reaction Pathways for Propane Oxidative Dehydrogenation on Molybdenum Oxide Catalysts

    E-Print Network [OSTI]

    Iglesia, Enrique

    Isotopic Tracer Studies of Reaction Pathways for Propane Oxidative Dehydrogenation on Molybdenum of propane over ZrO2-supported MoOx catalysts. Competitive reactions of C3H6 and CH3 13 CH2CH3 showed combustion of propene, or by direct combustion of propane. A mixture of C3H8 and C3D8 undergoes oxidative

  3. Molecular Properties of the "Ideal" Inhaled Anesthetic: Studies of Fluorinated Methanes, Ethanes, Propanes,

    E-Print Network [OSTI]

    Hudlicky, Tomas

    , Propanes, and Butanes E. 1Eger, 11, MD*, J. Liu, MD*, D. D. Koblin, PhD, MDt, M. J. Laster, DVM*, S. Taheri unfluorinated, partially fluorinated, and perfluorinated methanes, ethanes, propanes, and butanes to define fluorinated methanes, ethanes, propanes, and butanes, also obtaining limited data on longer- chained alkanes

  4. Functional Characterization of Propane-Enhanced N-Nitrosodimethylamine Degradation by

    E-Print Network [OSTI]

    Alvarez-Cohen, Lisa

    ARTICLE Functional Characterization of Propane-Enhanced N-Nitrosodimethylamine Degradation by Two: Propane-induced cometabolic degradation of n-nitrosodimethylamine (NDMA) by two propanotrophs is characterized through kinetic, gene presence, and expression studies. After growth on propane, resting cells

  5. Ceramic microreactors for on-site hydrogen production from high temperature steam reforming of propane{

    E-Print Network [OSTI]

    Kenis, Paul J. A.

    of propane{ Christian, Michael Mitchell and Paul J. A. Kenis* Received 31st May 2006, Accepted 10th August of propane into hydrogen at temperatures between 800 and 1000 uC. We characterized these microreactors. Kinetic analysis using a power law model showed reaction orders of 0.50 and 20.23 with respect to propane

  6. Fourier transform microwave spectrum of the propane-water complex: A prototypical water-hydrophobe system

    E-Print Network [OSTI]

    Cohen, Ronald C.

    Fourier transform microwave spectrum of the propane-water complex: A prototypical water) The Fourier transform microwave spectrum of the propane-water complex (C3H,-H,O) has been observed and analyzed. This spectrum includes transitions assigned to propane complexed with both the ortho and para

  7. Improved Product-Per-Glucose Yields in P450-Dependent Propane Biotransformations

    E-Print Network [OSTI]

    Arnold, Frances H.

    ARTICLE Improved Product-Per-Glucose Yields in P450-Dependent Propane Biotransformations Using propane monooxygenase prepared by directed evolu- tion [P450PMOR2; Fasan et al. (2007); Angew Chem Int Ed of the energy source (glucose) in the propane biotransformation com- pared to the native E. coli strain. Using

  8. Catalytic Properties of Supported MoO3 Catalysts for Oxidative Dehydrogenation of Propane

    E-Print Network [OSTI]

    Iglesia, Enrique

    Catalytic Properties of Supported MoO3 Catalysts for Oxidative Dehydrogenation of Propane Kaidong The effects of MoOx structure on propane oxidative dehydrogenation (ODH) rates and selectivity were examined with those obtained on MoOx/ZrO2. On MoOx/Al2O3 catalysts, propane turnover rate increased with increasing Mo

  9. High propylene/propane adsorption selectivity in a copper(catecholate)-decorated porous organic

    E-Print Network [OSTI]

    High propylene/propane adsorption selectivity in a copper(catecholate)-decorated porous organic and propane isotherms measured at ambient temperatures and ideal adsorption solution theory (IAST) calculations revealed increasing propylene/propane selectivities with increasing pressures. The eld of highly

  10. Layering and orientational ordering of propane on graphite: An experimental and simulation study

    E-Print Network [OSTI]

    Borguet, Eric

    Layering and orientational ordering of propane on graphite: An experimental and simulation study 2002; accepted 30 July 2002 We report the results of an experimental and theoretical study of propane and experiments show that propane adsorbs in a layer-by-layer fashion and exhibits continuous growth beyond

  11. Selective adsorption of ethylene over ethane and propylene over propane in the metalorganic

    E-Print Network [OSTI]

    Selective adsorption of ethylene over ethane and propylene over propane in the metal in the energy costs associated with the cryogenic separation of ethylene­ethane and propylene­propane mixtures adsorption data for ethylene, ethane, propylene, and propane at 45, 60, and 80 C for the entire series

  12. Novel Methane, Ethane, and Propane Oxidizing Bacteria at Marine Hydrocarbon Seeps Identified by Stable Isotope Probing

    E-Print Network [OSTI]

    Sessions, Alex L.

    Novel Methane, Ethane, and Propane Oxidizing Bacteria at Marine Hydrocarbon Seeps Identified by Stable Isotope Probing Running Title: Novel Methane, Ethane, and Propane Oxidizing Bacteria Section incubating sediment with 13 C-labeled methane, ethane, or propane, we5 confirmed the incorporation of 13 C

  13. Experimental Study of Propane-Fueled Pulsed Detonation Rocket Frank K. Lu,* Jason M. Meyers,

    E-Print Network [OSTI]

    Texas at Arlington, University of

    1 Experimental Study of Propane-Fueled Pulsed Detonation Rocket Frank K. Lu,* Jason M. Meyers in comparison to cases without the spiral. Tests through a range of cycle frequencies up to 20 Hz in oxygen-propane spiral in a pulsed detonation engine operating with propane and oxygen. A high-energy igniter is used

  14. Structural and dynamic properties of propane coordinated to TpRh(CNR) from a confrontation

    E-Print Network [OSTI]

    Jones, William D.

    Structural and dynamic properties of propane coordinated to TpRh(CNR) from a confrontation between] in interaction with propane. Two complexes have been found as minima coordinated through either a methyl the methylene complex of propane into a methyl complex of pro- pane. This latter reaction has a much lower

  15. Ionization Spectroscopy of Conformational Isomers of Propanal: The Origin of the Conformational Preference

    E-Print Network [OSTI]

    Kim, Sang Kyu

    Ionization Spectroscopy of Conformational Isomers of Propanal: The Origin of the Conformational conformational isomers of propanal, cis and gauche, are investigated by the vacuum-UV mass- analyzed thresholdV and 9.9516 ( 0.0006 eV, respectively. cis-Propanal, which is the more stable conformer in the neutral

  16. PROPANE -C3H8 MSDS (Document # 001045) PAGE 1 OF 8 MATERIAL SAFETY DATA SHEET

    E-Print Network [OSTI]

    Choi, Kyu Yong

    PROPANE - C3H8 MSDS (Document # 001045) PAGE 1 OF 8 MATERIAL SAFETY DATA SHEET Prepared to U in an emergency? 1. PRODUCT IDENTIFICATION CHEMICAL NAME; CLASS: PROPANE - C3H8 Document Number: 001045 PRODUCT IN AIR ACGIH OSHA TLV STEL PEL STEL IDLH OTHER ppm ppm ppm ppm ppm Propane 74-98-6 > 96.0 Simple

  17. Coleman Two Burner Stove The Coleman Matchlight 2-Burner Propane Stove is especially designed for outdoor

    E-Print Network [OSTI]

    Walker, Lawrence R.

    Coleman Two Burner Stove The Coleman Matchlight 2-Burner Propane Stove is especially designed-burner propane stove has a high-pressure regulator that ensures a constant flame regardless of weather propane stove has a removable nickel-chrome-plated grate that makes for easy cleaning. The aluminized

  18. Absorption du rayonnement 12 et 8 millimtres par les vapeurs de propane sous pression

    E-Print Network [OSTI]

    Boyer, Edmond

    Absorption du rayonnement 12 et 8 millimètres par les vapeurs de propane sous pression A. Battaglia des pertes diélectriques (03B5") présentées par le propane gazeux aux fréquences de 24 et 36 GHz, à la Birnbaum. Abstract. 2014 Experimental study of dielectric losses (03B5") presented by gaseous propane

  19. Dehydrogenation of Propane to Propylene over Supported Model NiAu Catalysts

    E-Print Network [OSTI]

    Goodman, Wayne

    Dehydrogenation of Propane to Propylene over Supported Model Ni­Au Catalysts Zhen Yan · Yunxi Yao 2012 Ó Springer Science+Business Media, LLC 2012 Abstract Hydrogenolysis and dehydrogenation of propane. For the conversionofpropane in the presence of hydrogen, the dehydrogenation of propane to propylene was observed onthe Ni

  20. Synthesis and Characterization of Gold Clusters Ligated with 1,3-Bis(dicyclohexylphosphino)propane

    SciTech Connect (OSTI)

    Johnson, Grant E.; Priest, Thomas A.; Laskin, Julia

    2013-09-01T23:59:59.000Z

    In this multidisciplinary study we combine chemical reduction synthesis of novel gold clusters in solution with high-resolution analytical mass spectrometry (MS) to gain insight into the composition of the gold clusters and how their size, ionic charge state and ligand substitution influences their gas-phase fragmentation pathways. Ultra small cationic gold clusters ligated with 1,3-bis(dicyclohexylphosphino)propane (DCPP) were synthesized for the first time and introduced into the gas phase using electrospray ionization (ESI). Mass-selected cluster ions were fragmented employing collision induced dissociation (CID) and the product ions were analysed using MS. The solutions were found to contain the multiply charged cationic gold clusters Au9L43+, Au13L53+, Au6L32+, Au8L32+ and Au10L42+ (L = DCPP). The gas-phase fragmentation pathways of these cluster ions were examined systematically employing CID combined with MS. In addition, CID experiments were performed on related gold clusters of the same size and ionic charge state but capped with 1,3-bis(diphenylphosphino)propane (DPPP) ligands containing phenyl functional groups at the two phosphine centers instead of cyclohexane rings. It is shown that this relatively small change in the molecular substitution of the two phosphine centers in diphosphine ligands (C6H11 versus C6H5) exerts a pronounced influence on the size of the species that are preferentially formed in solution during reduction synthesis as well as the gas-phase fragmentation channels of otherwise identical gold cluster ions. The mass spectrometry results indicate that in addition to the length of the alkyl chain between the two phosphine centers, the substituents at the phosphine centers also play a crucial role in determining the composition, size and stability of diphosphine ligated gold clusters synthesized in solution.

  1. Zeolitic imidazolate frameworks for kinetic separation of propane and propene

    SciTech Connect (OSTI)

    Li, Jing; Li, Kunhao; Olson, David H.

    2014-08-05T23:59:59.000Z

    Zeolitic Imidazolate Frameworks (ZIFs) characterized by organic ligands consisting of imidazole ligands that are either essentially all 2-chloroimidazole ligands or essentially all 2-bromoimidazole ligands are disclosed. Methods for separating propane and propene with the ZIFs of the present invention, as well as other ZIFs, are also disclosed.

  2. Experimental comparison of hot water/propane injection to steam/propane injection for recovery of heavy oil 

    E-Print Network [OSTI]

    Nesse, Thomas

    2005-02-17T23:59:59.000Z

    , attempts have been made to inject hot water instead of steam. The results have all been rather poor, the major problem being low sweep efficiency. The hot water just doesn?t enhance oil recovery enough. Adding propane to the steam injected in the reservoir...

  3. Experimental comparison of hot water/propane injection to steam/propane injection for recovery of heavy oil

    E-Print Network [OSTI]

    Nesse, Thomas

    2005-02-17T23:59:59.000Z

    , attempts have been made to inject hot water instead of steam. The results have all been rather poor, the major problem being low sweep efficiency. The hot water just doesn?t enhance oil recovery enough. Adding propane to the steam injected in the reservoir...

  4. Effect of a current polarisation on BIMEVOX membranes for oxidation of propane in a Catalytic Dense Membrane

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Effect of a current polarisation on BIMEVOX membranes for oxidation of propane in a Catalytic Dense of propane under OCV and under electrical bias. The propane conversion remained constantly equal to 12 by partial oxidation and oxidative dehydrogenation of propane, respectively. An anodic polarisation led

  5. Isotopic Tracer Studies of Propane Reactions on H-ZSM5 Zeolite Joseph A. Biscardi and Enrique Iglesia*

    E-Print Network [OSTI]

    Iglesia, Enrique

    Isotopic Tracer Studies of Propane Reactions on H-ZSM5 Zeolite Joseph A. Biscardi and Enrique unlabeled products from mixtures of propene and propane-2-13C reactants. Aromatic products of propane-2-13C-Parmer) that allowed differential reactor operation (propane reactions were

  6. Gas separation with oligomer-modified inorganic membranes

    E-Print Network [OSTI]

    Javaid, Asad

    1999-01-01T23:59:59.000Z

    -based separation are presented. Alumina membranes with average pore sizes near 5 nm and 10 run were treated with various n-alkyl trichlorosilanes. Pure gas permeation studies using nitrogen, methane, and propane were performed to investigate the effects...

  7. National Grid (Gas) – Residential EnergyWise Rebate Programs

    Broader source: Energy.gov [DOE]

    National Grid's EnergyWise programs encourage energy efficiency amongst its residential customers. Interested customers who heat with gas, oil, or propane should schedule a free home energy audit...

  8. Home Energy Score Program Overview for the American Gas Association...

    Energy Savers [EERE]

    Here we can enter either the efficiency value -- the AFUE in the case of gas or propane or oil. If you don't know that, you can use an installed year. This gives a...

  9. Type-I superconductor pick-up coil in superconducting quantum interference device-based ultra-low field nuclear magnetic resonance

    SciTech Connect (OSTI)

    Hwang, Seong-min, E-mail: smhwang@kriss.re.kr; Kim, Kiwoong; Kyu Yu, Kwon; Lee, Seong-Joo; Hyun Shim, Jeong [Korea Research Institute of Standards and Science, Daejeon 305-340 (Korea, Republic of); Körber, Rainer [Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2-12, 10587 Berlin (Germany); Magnicon GmbH, Division Berlin, Abbestraße 2-12, D-10587 Berlin (Germany); Burghoff, Martin [Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2-12, 10587 Berlin (Germany)

    2014-02-10T23:59:59.000Z

    In ultra-low field nuclear magnetic resonance (ULF-NMR) with strong prepolarization field (B{sub p}), type-II superconducting pick-up coils may be vulnerable to flux pinning from the strong B{sub p}. Pick-up coils made of NbTi, Nb, and Pb were evaluated in terms of acquired NMR signal quality. The type-II pick-up coils showed degraded signals above 61?mT maximum exposure, while the Pb pick-up coil exhibited no such degradation. Furthermore, a negative counter pulse following a strong B{sub p} was shown to follow magnetic hysteresis loop to unpin the trapped flux in the type-II pick-up coil and restore the NMR signal.

  10. Search for 2? decays of 96Ru and 104Ru by ultra-low background HPGe gamma spectrometry at LNGS: final results

    E-Print Network [OSTI]

    P. Belli; R. Bernabei; F. Cappella; R. Cerulli; F. A. Danevich; S. d'Angelo; A. Incicchitti; G. P. Kovtun; N. G. Kovtun; M. Laubenstein; D. V. Poda; O. G. Polischuk; A. P. Shcherban; D. A. Solopikhin; J. Suhonen; V. I. Tretyak

    2013-02-28T23:59:59.000Z

    An experiment to search for double beta decay processes in 96Ru and 104Ru, which are accompanied by gamma rays, has been realized in the underground Gran Sasso National Laboratories of the I.N.F.N. (Italy). Ruthenium samples with masses of about (0.5-0.7) kg were measured with the help of ultra-low background high purity Ge gamma ray spectrometry. After 2162 h of data taking the samples were deeply purified to reduce the internal contamination of 40K. The last part of the data has been accumulated over 5479 h. New improved half life limits on 2\\beta+/\\epsilon \\beta+/2\\epsilon\\ processes in 96Ru have been established on the level of 10^{20} yr, in particular for decays to the ground state of 96Mo: T1/2(2\

  11. Limits on Low-Mass WIMP Dark Matter with an Ultra-Low-Energy Germanium Detector at 220 eV Threshold

    E-Print Network [OSTI]

    Shin-Ted Lin; H. T. Wong; for the TEXONO Collaboration

    2008-10-20T23:59:59.000Z

    An energy threshold of (220$\\pm$10) eV was achieved at an efficiency of 50% with a four-channel ultra-low-energy germanium detector each with an active mass of 5 g\\cite{wimppaper}. This provides a unique probe to WIMP dark matter with mass below 10 GeV. With low background data taken at the Kuo-Sheng Laboratory, constraints on WIMPs in the galactic halo were derived. Both spin-independent WIMP-nucleon and spin-dependent WIMP-neutron bounds improve over previous results for WIMP mass between 3$-$6 GeV. These results, together with those on spin-dependent couplings, will be presented. Sensitivities for full-scale experiments were projected. This detector technique makes the unexplored sub-keV energy window accessible for new neutrino and dark matter experiments.

  12. Search for 2\\beta\\ decays of 96Ru and 104Ru by ultra-low background HPGe gamma spectrometry at LNGS: final results

    E-Print Network [OSTI]

    Belli, P; Cappella, F; Cerulli, R; Danevich, F A; d'Angelo, S; Incicchitti, A; Kovtun, G P; Kovtun, N G; Laubenstein, M; Poda, D V; Polischuk, O G; Shcherban, A P; Solopikhin, D A; Suhonen, J; Tretyak, V I

    2013-01-01T23:59:59.000Z

    An experiment to search for double beta decay processes in 96Ru and 104Ru, which are accompanied by gamma rays, has been realized in the underground Gran Sasso National Laboratories of the I.N.F.N. (Italy). Ruthenium samples with masses of about (0.5-0.7) kg were measured with the help of ultra-low background high purity Ge gamma ray spectrometry. After 2162 h of data taking the samples were deeply purified to reduce the internal contamination of 40K. The last part of the data has been accumulated over 5479 h. New improved half life limits on 2\\beta+/\\epsilon \\beta+/2\\epsilon\\ processes in 96Ru have been established on the level of 10^{20} yr, in particular for decays to the ground state of 96Mo: T1/2(2\

  13. Experimental study on transmission of an overdriven detonation wave from propane/oxygen to propane/air

    SciTech Connect (OSTI)

    Li, J.; Lai, W.H. [National Cheng Kung University, Institute of Aeronautics and Astronautics, Tainan (China); Chung, K. [National Cheng Kung University, Aerospace Science and Technology Research Center, Tainan (China); Lu, F.K. [University of Texas at Arlington, Mechanical and Aerospace Engineering Department, Aerodynamics Research Center, TX 76019 (United States)

    2008-08-15T23:59:59.000Z

    Two sets of experiments were performed to achieve a strong overdriven state in a weaker mixture by propagating an overdriven detonation wave via a deflagration-to-detonation transition (DDT) process. First, preliminary experiments with a propane/oxygen mixture were used to evaluate the attenuation of the overdriven detonation wave in the DDT process. Next, experiments were performed wherein a propane/oxygen mixture was separated from a propane/air mixture by a thin diaphragm to observe the transmission of an overdriven detonation wave. Based on the characteristic relations, a simple wave intersection model was used to calculate the state of the transmitted detonation wave. The results showed that a rarefaction effect must be included to ensure that there is no overestimate of the post-transmission wave properties when the incident detonation wave is overdriven. The strength of the incident overdriven detonation wave plays an important role in the wave transmission process. The experimental results showed that a transmitted overdriven detonation wave occurs instantaneously with a strong incident overdriven detonation wave. The near-CJ state of the incident wave leads to a transmitted shock wave, and then the transition to the overdriven detonation wave occurs downstream. The attenuation process for the overdriven detonation wave decaying to a near-CJ state occurs in all tests. After the attenuation process, an unstable detonation wave was observed in most tests. This may be attributed to the increase in the cell width in the attenuation process that exceeds the detonability cell width limit. (author)

  14. Table A2. Refiner/Reseller Prices of Aviation Fuels, Propane...

    Gasoline and Diesel Fuel Update (EIA)

    Marketing Annual 1999 421 Table A2. RefinerReseller Prices of Aviation Fuels, Propane, and Kerosene, by PAD District, 1983-Present (Cents per Gallon Excluding Taxes) -...

  15. Table A2. Refiner/Reseller Prices of Aviation Fuels, Propane...

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    Marketing Annual 1995 467 Table A2. RefinerReseller Prices of Aviation Fuels, Propane, and Kerosene, by PAD District, 1983-Present (Cents per Gallon Excluding Taxes) -...

  16. Table 14. U.S. Propane (Consumer Grade) Prices by Sales Type

    U.S. Energy Information Administration (EIA) Indexed Site

    and EIA-782B, "Resellers'Retailers' Monthly Petroleum Product Sales Report." 14. U.S. Propane (Consumer Grade) Prices by Sales Type 28 Energy Information Administration ...

  17. Microsoft PowerPoint - Joe Rose.Providence.Propane Supply Infrastruct...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    from the Gulf Coast. * Growth in Canadian demand for diluent (Pentanes+) demand for the oil sands industry. American Shale Production In 2013, U.S. Propane Production Increased...

  18. Propane cold neutron source: creation and operation experience

    SciTech Connect (OSTI)

    Zemlyanov, M. G.

    1997-09-01T23:59:59.000Z

    In most cold neutron sources, utilized until recently, liquid hydrogen, liquid deuterium and their mixtures were used as a moderating medium. The sources with the liquid hydrogen moderator offer the most specific effectiveness of cold neutron generation. But they are complicated in design, require special safety measures in the course of operation and are very expensive. In this connection, it is of undoubted interest to create a source which, although it yields the specific generation of cold neutrons comparable to the liquid hydrogen one, is safer in operation and simple in design. We assume such a source may be one which uses as a moderator liquid propane cooled to liquid nitrogen temperature.

  19. Alternative Fuels Data Center: Michigan Converts Vehicles to Propane,

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduce OperatingPropane in OhioReducing

  20. Alternative Fuels Data Center: Propane Buses Shuttle Visitors in Maine

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduceNew HampshirePropane Buses Shuttle

  1. Alternative Fuels Data Center: Propane Fueling Infrastructure Development

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduceNew HampshirePropane Buses

  2. Alternative Fuels Data Center: Propane Fueling Station Locations

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduceNew HampshirePropane BusesStation

  3. Alternative Fuels Data Center: Propane Mowers Help National Park Cut

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduceNew HampshirePropane

  4. Alternative Fuels Data Center: Propane Powers Fleets Across the Nation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduceNew HampshirePropaneOrleans

  5. Alternative Fuels Data Center: Propane School Buses Launched in Gloucester

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduceNewPropane Printable Version Share

  6. Alternative Fuels Data Center: Propane Tank Overfill Safety Advisory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduceNewPropane Printable Version

  7. Alternative Fuels Data Center: Propane Vans Keep Kansas City Transportation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduceNewPropane Printable VersionCompany

  8. Alternative Fuels Data Center: Renzenberger Inc Saves Money With Propane

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduceNewPropane PrintableTools

  9. Final report of the Rhode Island State Energy Office on residential no. 2 heating oil and propane prices [SHOPP

    SciTech Connect (OSTI)

    McClanahan, Janice

    2001-04-01T23:59:59.000Z

    Summary report on residential No.2 heating oil and propane prepared under grant. Summarizes the monitoring and analysis of heating oil and propane prices from October 2000 through March 2001.

  10. Further experimental studies of steam-propane injection to enhance recovery of Morichal oil 

    E-Print Network [OSTI]

    Ferguson,Mark Anthony

    2000-01-01T23:59:59.000Z

    In 1998-1999, experimental research was conducted by Goite at Texas A&M University into steam-propane injection to enhance oil recovery from the Morichal field, Venezuela. Goite's results showed that, compared with steam injection alone, steam-propane...

  11. Experimental studies of steam-propane injection to enhance recovery of an intermediate crude oil 

    E-Print Network [OSTI]

    Tinss, Judicael Christopher

    2001-01-01T23:59:59.000Z

    In the past few years, research has been conducted at Texas A&M University on steam-propane injection to enhance oil recovery from the Morichal field, Venezuela, which contains 13.5 ?API gravity oil. Experimental results show that a 5:100 propane...

  12. Experimental studies of steam-propane injection to enhance recovery of an intermediate crude oil

    E-Print Network [OSTI]

    Tinss, Judicael Christopher

    2001-01-01T23:59:59.000Z

    In the past few years, research has been conducted at Texas A&M University on steam-propane injection to enhance oil recovery from the Morichal field, Venezuela, which contains 13.5 ?API gravity oil. Experimental results show that a 5:100 propane...

  13. Further experimental studies of steam-propane injection to enhance recovery of Morichal oil

    E-Print Network [OSTI]

    Ferguson,Mark Anthony

    2000-01-01T23:59:59.000Z

    In 1998-1999, experimental research was conducted by Goite at Texas A&M University into steam-propane injection to enhance oil recovery from the Morichal field, Venezuela. Goite's results showed that, compared with steam injection alone, steam-propane...

  14. 9118 J. Am. Chem. SOC.1992, 114, 9118-9122 Propane Buwe

    E-Print Network [OSTI]

    Schlegel, H. Bernhard

    9118 J. Am. Chem. SOC.1992, 114, 9118-9122 Scheme 111 Propane Buwe X =CHI and Y = H lossofH2 Z = H-82-8; ethane, 74- 84-0; propane, 74-98-6;butane, 106-97-8. (28) The heats of formation for C3H2are the scaled

  15. State heating oil and propane program, 1994--1995 heating season. Final technical report

    SciTech Connect (OSTI)

    NONE

    1995-05-09T23:59:59.000Z

    Propane prices and No. 2 fuel prices during the 1994-1995 heating season are tabulated for the state of Ohio. Nineteen companies were included in the telephone survey of propane prices, and twenty two companies for the fuel oil prices. A bar graph is also presented for average residential prices of No. 2 heating oil.

  16. Orbital effects of a monochromatic plane gravitational wave with ultra-low frequency incident on a gravitationally bound two-body system

    E-Print Network [OSTI]

    Lorenzo Iorio

    2014-09-12T23:59:59.000Z

    We analytically compute the long-term orbital variations of a test particle orbiting a central body acted upon by an incident monochromatic plane gravitational wave. We assume that the characteristic size of the perturbed two-body system is much smaller than the wavelength of the wave. Moreover, we also suppose that the wave's frequency is much smaller than the particle's orbital one. We make neither a priori assumptions about the direction of the wavevector nor on the orbital geometry of the planet. We find that, while the semi-major axis is left unaffected, the eccentricity, the inclination, the longitude of the ascending node, the longitude of pericenter and the mean anomaly undergo non-vanishing long-term changes. They are not secular trends because of the slow modulation introduced by the tidal matrix coefficients and by the orbital elements themselves. They could be useful to indepenedently constrain the ultra-low frequency waves which may have been indirectly detected in the BICEP2 experiment. Our calculation holds, in general, for any gravitationally bound two-body system whose characteristic frequency is much larger than the frequency of the external wave. It is also valid for a generic perturbation of tidal type with constant coefficients over timescales of the order of the orbital period of the perturbed particle.

  17. Integrated production/use of ultra low-ash coal, premium liquids and clean char. Technical report, March 1, 1992--May 31, 1992

    SciTech Connect (OSTI)

    Kruse, C.W.; Carlson, S.L. [Illinois State Geological Survey, Champaign, IL (United States); Snoeyink, V.L.; Feizoulof, C.; Assanis, D.N.; Syrimis, M. [Illinois Univ., Urbana, IL (United States); Fatemi, S.M. [Amoco Research Center, Naperville, IL (United States)

    1992-10-01T23:59:59.000Z

    The first step in the envisioned integrated, multi-product approach for utilizing Illinois coal is the production of ultra low-ash coal. Subsequent steps would convert low-ash coal to high-value products through mild gasification, char activation, and oxidation reactions. Approximately eight pounds of low-ash coal has been obtained from the crude reactor slurry produced for us at the University of North Dakota Energy and Environmental Research Center (UNDEERC). After treatment to remove the remaining meta-cresol, this material will be subjected to mild gasification. Low-ash mild gasification char will be activated and a catalyst surface will be added by oxidation. A 20% coal: 80% diesel fuel slurry was tested in cylinder two of a two-cylinder, diesel engine after the necessary modifications in the engine`s fuel injection system were made. Four tests indicated that the coal successfully substitutes for diesel fuel in the slurry. The fuel burns in the cylinder, with slightly improved thermal and combustion efficiency. The tests were performed at 1800 rpm and 2200 rpm and 75% load. The change in the surface properties of Calgon F-400 commercial activated carbon caused by several treatments were examined by X-ray Photoelectron Spectroscopy (XPS).

  18. PARTICULATE CHARACTERIZATION AND ULTRA LOW-NOx BURNER FOR THE CONTROL OF NO{sub x} AND PM{sub 2.5} FOR COAL FIRED BOILERS

    SciTech Connect (OSTI)

    Ralph Bailey; Hamid Sarv; Jim Warchol; Debi Yurchison

    2001-09-30T23:59:59.000Z

    In response to the serious challenge facing coal-fired electric utilities with regards to curbing their NO{sub x} and fine particulate emissions, Babcock and Wilcox and McDermott Technology, Inc. conducted a project entitled, ''Particulate Characterization and Ultra Low-NO{sub x} Burner for the Control of NO{sub x} and PM{sub 2.5} for Coal Fired Boilers.'' The project included pilot-scale demonstration and characterization of technologies for removal of NO{sub x} and primary PM{sub 2.5} emissions. Burner development and PM{sub 2.5} characterization efforts were based on utilizing innovative concepts in combination with sound scientific and fundamental engineering principles and a state-of-the-art test facility. Approximately 1540 metric tonnes (1700 tons) of high-volatile Ohio bituminous coal were fired. Particulate sampling for PM{sub 2.5} emissions characterization was conducted in conjunction with burner testing. Based on modeling recommendations, a prototype ultra low-NO{sub x} burner was fabricated and tested at 100 million Btu/hr in the Babcock and Wilcox Clean Environment Development Facility. Firing the unstaged burner with a high-volatile bituminous Pittsburgh 8 coal at 100 million Btu/hr and 17% excess air achieved a NO{sub x} goal of 0.20 lb NO{sub 2}/million Btu with a fly ash loss on ignition (LOI) of 3.19% and burner pressure drop of 4.7 in H{sub 2}O for staged combustion. With the burner stoichiometry set at 0.88 and the overall combustion stoichiometry at 1.17, average NO{sub x} and LOI values were 0.14 lb NO{sub 2}/million Btu and 4.64% respectively. The burner was also tested with a high-volatile Mahoning 7 coal. Based on the results of this work, commercial demonstration is being pursued. Size classified fly ash samples representative of commercial low-NO{sub x} and ultra low-NO{sub x} combustion of Pittsburgh 8 coal were collected at the inlet and outlet of an ESP. The mass of size classified fly ash at the ESP outlet was sufficient to evaluate the particle size distribution, but was of insufficient size to permit reliable chemical analysis. The size classified fly ash from the inlet of the ESP was used for detailed chemical analyses. Chemical analyses of the fly ash samples from the ESP outlet using a high volume sampler were performed for comparison to the size classified results at the inlet. For all test conditions the particulate removal efficiency of the ESP exceeded 99.3% and emissions were less than the NSPS limits of {approx}48 mg/dscm. With constant combustion conditions, the removal efficiency of the ESP increased as the ESP voltage and Specific Collection Area (SCA) increased. The associated decrease in particle emissions occurred in size fractions both larger and smaller than 2.5 microns. For constant ESP voltage and SCA, the removal efficiency for the ultra low-NO{sub x} combustion ash (99.4-99.6%) was only slightly less than for the low-NO{sub x} combustion ash (99.7%). The decrease in removal efficiency was accompanied by a decrease in ESP current. The emission of PM{sub 2.5} from the ESP did not change significantly as a result of the change in combustion conditions. Most of the increase in emissions was in the size fraction greater than 2.5 microns, indicating particle re-entrainment. These results may be specific to the coal tested in this program. In general, the concentration of inorganic elements and trace species in the fly ash at the ESP inlet was dependent on the particle size fraction. The smallest particles tended to have higher concentrations of inorganic elements/trace species than larger particles. The concentration of most elements by particle size range was independent of combustion condition and the concentration of soluble ions in the fly ash showed little change with combustion condition when evaluated on a carbon free basis.

  19. Performance and Emissions Characteristics of Bio-Diesel (B100)-Ignited Methane and Propane Combustion in a Four Cylinder Turbocharged Compression Ignition Engine

    SciTech Connect (OSTI)

    Shoemaker, N. T.; Gibson, C. M.; Polk, A. C.; Krishnan, S. R.; Srinivasan, K. K.

    2011-10-05T23:59:59.000Z

    Different combustion strategies and fuel sources are needed to deal with increasing fuel efficiency demands and emission restrictions. One possible strategy is dual fueling using readily available resources. Propane and natural gas are readily available with the current infrastructure and biodiesel is growing in popularity as a renewable fuel. This paper presents experimental results from dual fuel combustion of methane (as a surrogate for natural gas) and propane as primary fuels with biodiesel pilots in a 1.9 liter, turbocharged, 4 cylinder diesel engine at 1800 rev/min. Experiments were performed with different percentage energy substitutions (PES) of propane and methane and at different brake mean effective pressures (BMEP/bmep). Brake thermal efficiency (BTE) and emissions (NOx, HC, CO, CO2, O2 and smoke) were also measured. Maximum PES levels for B100-methane dual fuelling were limited to 70% at 2.5 bar bmep and 48% at 10 bar bmep, and corresponding values for B100-propane dual fuelling were 64% and 43%, respectively. Maximum PES was limited by misfire at 2.5 bar bmep and the onset of engine knock at 10 bar bmep. Dual fuel BTEs approached straight B100 values at 10 bar bmep while they were significantly lower than B100 values at 2.5 bar bmep. In general dual fuelling was beneficial in reducing NOx and smoke emissions by 33% and 50%, respectively from baseline B100 levels; however, both CO and THC emissions were significantly higher than baseline B100 levels at all PES and loads.

  20. Far-infrared laser vibration-rotation-tunneling spectroscopy of the propane-water compkx: Torsional dynamics of the hydrogen

    E-Print Network [OSTI]

    Cohen, Ronald C.

    Far-infrared laser vibration-rotation-tunneling spectroscopy of the propane-water compkx: Torsional 1993) The far-infrared laservibration-rotation-tunneling (FIR-VRT) spectrumof the propane-water complex calculations. In the present paper and in its counterpart,13we present our results for the water-propane

  1. Non-oxidative reactions of propane on Zn/Na-ZSM5 Joseph A. Biscardi and Enrique Iglesia*

    E-Print Network [OSTI]

    Iglesia, Enrique

    Non-oxidative reactions of propane on Zn/Na-ZSM5 Joseph A. Biscardi and Enrique Iglesia* Department rates during propane conversion at 773 K on Zn/Na-ZSM5 are about ten times higher than on Zn/H-ZSM5 catalysts with similar Zn content. The total rate of propane conversion is also higher on Zn/Na-ZSM5

  2. J. Am. Chem. SOC.1988, 110, 8305-8319 8305 Hydrogenolysis of Ethane, Propane, n-Butane, and Neopentane

    E-Print Network [OSTI]

    Goodman, Wayne

    J. Am. Chem. SOC.1988, 110, 8305-8319 8305 Hydrogenolysis of Ethane, Propane, n, Pasadena, California 91125. Received February I, 1988 Abstract: The hydrogenolysisof ethane, propane, n for ethane, propane, and neopentane involvesthe cleavage of a single carbon-carbon bond, resulting

  3. Modeling of the formation of short-chain acids in propane flames F. Battin-Leclerc , 1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Modeling of the formation of short-chain acids in propane flames F. Battin-Leclerc , 1 , A. Simulations of lean (equivalence ratios from 0.9 to 0.48) laminar premixed flames of propane stabilized in a combustion apparatus which can easily be modeled, a laminar premixed flame of propane at atmospheric pressure

  4. Kinetics and Reaction Pathways for Propane Dehydrogenation and Aromatization on Co/H-ZSM5 and H-ZSM5

    E-Print Network [OSTI]

    Iglesia, Enrique

    Kinetics and Reaction Pathways for Propane Dehydrogenation and Aromatization on Co/H-ZSM5 and H Co/H-ZSM5 catalyzes propane dehydrogenation and aromatization reactions. Initial product selectivities, product site-yields, and the 13C content and distribution in the products of 2-13C-propane show

  5. Natural gas cost for evaluating energy resource opportunities at Fort Stewart

    SciTech Connect (OSTI)

    Stucky, D.J.; Shankle, S.A.

    1993-01-01T23:59:59.000Z

    Ft. Stewart, a United States Army Forces Command (FORSCOM) installation located near Hinesville, Georgia, is currently undergoing an evaluation of its energy usage, which is being performed by Pacific Northwest Laboratory. In order to examine the energy resource opportunities (EROs) at Ft. Stewart, marginal fuel costs must be calculated. The marginal, or avoided, cost of gas service is used in conjunction with the estimated energy savings of an ERO to calculate the dollar value of those savings. In the case of natural gas, the costing becomes more complicated due to the installation of a propane-air mixing station. The propane-air station is being built under a shared energy savings (SES) contract. The building of a propane-air station allows Ft. Stewart to purchase natural gas from their local utility at an interruptible rate, which is lower than the rate for contracting natural gas on a firm basis. The propane-air station will also provide Ft. Stewart with fuel in the event that the natural gas supply is curtailed. While the propane-air station does not affect the actual cost of natural gas, it does affect the cost of services provided by gas. Because the propane-air station and the SES contract affect the cost of gas service, they must be included in the analysis. Our analysis indicates a marginal cost of gas service of 30.0 cents per therm, assuming a total propane usage by the mixing station of 42,278 gallons (38,600 therms) annually. Because the amount of propane that may be required in the event of a curtailment is small relative to the total service requirement, variations in the actual amount should not significantly affect the cost per therm.

  6. Gas Content of Gladys McCall Reservoir Brine A Topical Report

    Office of Scientific and Technical Information (OSTI)

    gas t o brine ratio. This w i l l result i n cubic feet of methane, ethane, propane, etc. per barrel of brine, Then, the contributions from sample points are added until...

  7. Simulation of hydrogen and hydrogen-assisted propane ignition in Pt catalyzed microchannel

    SciTech Connect (OSTI)

    Seshadri, Vikram; Kaisare, Niket S. [Department of Chemical Engineering, Indian Institute of Technology - Madras, Chennai 600 036 (India)

    2010-11-15T23:59:59.000Z

    This paper deals with self-ignition of catalytic microburners from ambient cold-start conditions. First, reaction kinetics for hydrogen combustion is validated with experimental results from the literature, followed by validation of a simplified pseudo-2D microburner model. The model is then used to study the self-ignition behavior of lean hydrogen/air mixtures in a Platinum-catalyzed microburner. Hydrogen combustion on Pt is a very fast reaction. During cold start ignition, hydrogen conversion reaches 100% within the first few seconds and the reactor dynamics are governed by the ''thermal inertia'' of the microburner wall structure. The self-ignition property of hydrogen can be used to provide the energy required for propane ignition. Two different modes of hydrogen-assisted propane ignition are considered: co-feed mode, where the microburner inlet consists of premixed hydrogen/propane/air mixtures; and sequential feed mode, where the inlet feed is switched from hydrogen/air to propane/air mixtures after the microburner reaches propane ignition temperature. We show that hydrogen-assisted ignition is equivalent to selectively preheating the inlet section of the microburner. The time to reach steady state is lower at higher equivalence ratio, lower wall thermal conductivity, and higher inlet velocity for both the ignition modes. The ignition times and propane emissions are compared. Although the sequential feed mode requires slightly higher amount of hydrogen, the propane emissions are at least an order of magnitude lower than the other ignition modes. (author)

  8. Effect of temperature and pressure on the dynamics of nanoconfined propane

    SciTech Connect (OSTI)

    Gautam, Siddharth, E-mail: gautam.25@osu.edu; Liu, Tingting, E-mail: gautam.25@osu.edu; Welch, Susan; Cole, David [School of Earth Sciences, The Ohio State University, 275 Mendenhall Laboratory, 125 S Oval Mall, Columbus, OH 43210 (United States); Rother, Gernot [Geochemistry and Interfacial Science Group, Chemical Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States); Jalarvo, Niina [Jülich Center for Neutron Sciences (JCNS-1), Forschungszentrum Jülich Outstation at Spallation Neutron Source(SNS), Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States); Mamontov, Eugene [Spallation Neutron Source (SNS), Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States)

    2014-04-24T23:59:59.000Z

    We report the effect of temperature and pressure on the dynamical properties of propane confined in nanoporous silica aerogel studied using quasielastic neutron scattering (QENS). Our results demonstrate that the effect of a change in the pressure dominates over the effect of temperature variation on the dynamics of propane nano-confined in silica aerogel. At low pressures, most of the propane molecules are strongly bound to the pore walls, only a small fraction is mobile. As the pressure is increased, the fraction of mobile molecules increases. A change in the mechanism of motion, from continuous diffusion at low pressures to jump diffusion at higher pressures has also been observed.

  9. A rapid compression machine study of the oxidation of propane in the negative temperature coefficient regime

    SciTech Connect (OSTI)

    Gallagher, S.M.; Curran, H.J.; Metcalfe, W.K.; Healy, D.; Simmie, J.M. [Combustion Chemistry Centre, National University of Ireland, Galway (Ireland); Bourque, G. [Rolls-Royce Canada, Montreal (Canada)

    2008-04-15T23:59:59.000Z

    The oxidation of propane has been studied in the temperature range 680-970 K at compressed gas pressures of 21, 27, and 37 atm and at varying equivalence ratios of 0.5, 1.0, and 2.0. These data are consistent with other experiments presented in the literature for alkane fuels in that, when ignition delay times are plotted as a function of temperature, a characteristic negative coefficient behavior is observed. In addition, these data were simulated using a detailed chemical kinetic model. It was found that qualitatively the model correctly simulated the effect of change in equivalence ratio and pressure, predicting that fuel-rich, high-pressure mixtures ignite fastest, while fuel-lean, low-pressure mixtures ignite slowest. Moreover, reactivity as a function of temperature is well captured, with the model predicting negative temperature coefficient behavior similar to the experiments. Quantitatively the model is faster than experiment for all mixtures at the lowest temperatures (650-750 K) and is also faster than experiment throughout the entire temperature range for fuel-lean mixtures. (author)

  10. Backward Raman amplification in a partially ionized gas A. A. Balakin,1

    E-Print Network [OSTI]

    was accessed 10,11 . The experimental success was achieved using a gas jet of propane, subse- quently ionized that would be most desired. Using the pro- pane gas jet, as opposed to pure hydrogen, eased conditions on the gas jet nozzle, since a lower gas pressure could pro- duce a higher density target. However, the use

  11. State heating oil and propane program: Final report. Survey of No.2 heating oil and propane prices at the retail level, October 1997 through March 1998

    SciTech Connect (OSTI)

    NONE

    1998-11-01T23:59:59.000Z

    The Energy Efficiency Division of the Vermont Department of Public Service (DPS) monitored the price and inventory of residential heating oil and propane during the 1997--98 heating season under a grant from the US Department of Energy`s Energy Information Administration (EIA). DPS staff collected data biweekly between October 5, 1997 and March 16, 1998 on the retail price of {number_sign}2 home heating oil and propane by telephone survey. Propane price quoted was based on the rate for a residential home heating customer using 1,000+ per year. The survey included a sample of fuel dealers selected by the EIA, plus additional dealers and fuels selected by the DPS. The EIA weighted, analyzed, and reported the data collected from their sample.

  12. Experimental and analytical studies of hydrocarbon yields under dry-, steam-, and steam-with-propane distillation 

    E-Print Network [OSTI]

    Jaiswal, Namit

    2007-09-17T23:59:59.000Z

    Simulation study has shown oil production is accelerated when propane is used as an additive during steam injection. To better understand this phenomenon, distillation experiments were performed using San Ardo crude oil (12oAPI). For comparison...

  13. Experimental study of Morichal heavy oil recovery using combined steam and propane injection 

    E-Print Network [OSTI]

    Goite Marcano, Jose Gregorio

    1999-01-01T23:59:59.000Z

    with steam (for the purpose of increasing steam recovery efficiency) are being evaluated. An experimental study has been performed to investigate the effect of combined steam and propane injection on recovery of heavy oil from the Morichal field, Venezuela...

  14. Experimental and analytical studies of hydrocarbon yields under dry-, steam-, and steam with propane-distillation 

    E-Print Network [OSTI]

    Ramirez Garnica, Marco Antonio

    2004-09-30T23:59:59.000Z

    Recent experimental and simulation studies -conducted at the Department of Petroleum Engineering at Texas A&M University - confirm oil production is accelerated when propane is used as an additive during steam injection. To better understand...

  15. Experimental study of Morichal heavy oil recovery using combined steam and propane injection

    E-Print Network [OSTI]

    Goite Marcano, Jose Gregorio

    1999-01-01T23:59:59.000Z

    with steam (for the purpose of increasing steam recovery efficiency) are being evaluated. An experimental study has been performed to investigate the effect of combined steam and propane injection on recovery of heavy oil from the Morichal field, Venezuela...

  16. Table A2. Refiner/Reseller Prices of Aviation Fuels, Propane...

    U.S. Energy Information Administration (EIA) Indexed Site

    - W 73.5 See footnotes at end of table. A2. RefinerReseller Prices of Aviation Fuels, Propane, and Kerosene, by PAD District, 1983-Present Energy Information Administration ...

  17. Analysis of tank deformation from fire induced ruptures and BLEVEs of 400 l propane tanks

    SciTech Connect (OSTI)

    Kielec, D.J.; Birk, A.M. [Queen`s Univ., Kingston, Ontario (Canada). Dept. of Mechanical Engineering

    1996-12-01T23:59:59.000Z

    A series of fire tests were conducted to study the thermal rupture of propane tanks. The tests involved 400 liter ASME automotive propane tanks filled to 80% capacity with commercial propane. The tanks were brought to failure using torches and pool fires. the resulting thermal ruptures varied in severity from minor fissures, measuring a few centimeters in length, to catastrophic failures where the tank was flattened on the ground. The catastrophic failures would typically be called Boiling Liquid Expanding Vapour Explosions (BLEVE). The objective of this work was to develop a correlation between the failure severity and the tank condition at failure. The deformed propane tanks were measured in detail and the extent of deformation was quantified. The tank failure severity was found to be a complex function of a number of tank and lading properties at failure. this paper presents the measured data from the tanks and a step by step description of how the correlation was determined.

  18. Analysis of fire-induced ruptures of 400-L propane tanks

    SciTech Connect (OSTI)

    Kielec, D.J.; Birk, A.M. [Queen`s Univ., Kingston, Ontario (Canada). Dept. of Mechanical Engineering

    1997-08-01T23:59:59.000Z

    A series of fire tests were conducted to study the thermal rupture of propane tanks. The tests involved 400-L ASME automotive propane tanks filled to 80% capacity with commercial propane. The tanks were brought to failure using torches and pool fires. The resulting thermal ruptures varied in severity from minor fissures, measuring a few centimeters in length, to catastrophic failures where the tank was flattened on the ground. The catastrophic failures would typically be called boiling liquid expanding vapor explosions (BLEVEs). The objective of this work was to develop a correlation between the failure severity and the tank condition at failure. The deformed propane tanks were measured in detail and the extent of deformation was quantified. The tank failure severity was found to be a complex function of a number of tank and lading properties at failure. This paper presents the measured data from the tanks and a step-by-step description of how the correlation was determined.

  19. Emissions from In-Use NG, Propane, and Diesel Fueled Heavy Duty...

    Broader source: Energy.gov (indexed) [DOE]

    Emissions from In-Use NG, Propane, and Diesel Fueled Heavy Duty Vehicles 2011 Directions in Engine-Efficiency and Emissions Research (DEER) October 3-6, 2011 Presented By: Kent...

  20. Experimental and analytical studies of hydrocarbon yields under dry-, steam-, and steam-with-propane distillation

    E-Print Network [OSTI]

    Jaiswal, Namit

    2007-09-17T23:59:59.000Z

    EXPERIMENTAL AND ANALYTICAL STUDIES OF HYDROCARBON YIELDS UNDER DRY-, STEAM-, AND STEAM-WITH- PROPANE DISTILLATION A Dissertation by NAMIT JAISWAL Submitted to the Office of Graduate Studies of Texas A&M University...-WITH- PROPANE-DISTILLATION A Dissertation by NAMIT JAISWAL Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved...

  1. Heat transfer coefficients for propane (R-290), isobutane (R-600a), and 50/50 mixture of propane and isobutane

    SciTech Connect (OSTI)

    Mathur, G.D. [Zexel USA Corp., Decatur, IL (United States)

    1998-12-31T23:59:59.000Z

    Tube-side heat transfer coefficients for single-phase flow, evaporation, and condensation are presented for propane (R-290), isobutane (R-600a), and a 50/50 mixture (by weight) of propane and isobutane. Heat transfer coefficients have been presented for smooth tubes based on the standard correlations available in the literature for pure refrigerants. The correlations for evaporation and condensation have previously been verified for R-12 and other refrigerants. The correlations for evaporation and condensation have previously been verified for R-12 and other refrigerants. The mass flux of the refrigerant is varied over a wide range that is typically encountered in residential, commercial, and automotive applications. Evaporation temperatures of {minus}6.7 C (20 F) and 4.4 C (40 F) and condensation temperatures of 37.8 C (100 F) and 48.9 C (120 F) have been used for this investigation. The heat transfer coefficients for hydrocarbons (R-290, R-600a, R-290/R-600a) have been compared with R-12 and R-134a. The REFPROP computer program developed by the National Institute of Standards and Technology (NIST) has been used to determine the thermodynamic properties for R-290, R-600a, and R-290/R-600a. This study shows that the heat transfer coefficients for hydrocarbons are significantly higher than those for both R-12 and R-134a. For the range of refrigerant temperatures and mass flux studied, single-phase vapor heat transfer coefficients for hydrocarbons are greater by 234% to 259% in comparison to R-12 and are greater by 167% to 181% in comparison to R-134a. The single-phase liquid heat transfer coefficients for hydrocarbons are greater by 193% to 245% in comparison to R-12; and are greater by 155% to 198% in comparison to R-134a. Average evaporative heat transfer coefficients for hydrocarbons are greater by 194% to 238% in comparison to R-12 and are greater by 157% to 192% in comparison to R-134a. Finally, average condensing coefficients are greater by 220% to 233% in comparison to R-12 and are greater by 177% to 187% in comparison to R-134a. Tables 3 through 6 show a summary of the heat transfer coefficient enhancement of the hydrocarbons in comparison to both R-12 and R-134a.

  2. Assessment of the risk of transporting propane by truck and train

    SciTech Connect (OSTI)

    Geffen, C.A.

    1980-03-01T23:59:59.000Z

    The risk of shipping propane is discussed and the risk assessment methodology is summarized. The risk assessment model has been constructed as a series of separate analysis steps to allow the risk to be readily reevaluated as additional data becomes available or as postulated system characteristics change. The transportation system and accident environment, the responses of the shipping system to forces in transportation accidents, and release sequences are evaluated to determine both the likelihood and possible consequences of a release. Supportive data and analyses are given in the appendices. The risk assessment results are related to the year 1985 to allow a comparison with other reports in this series. Based on the information presented, accidents involving tank truck shipments of propane will be expected to occur at a rate of 320 every year; accidents involving bobtails would be expected at a rate of 250 every year. Train accidents involving propane shipments would be expected to occur at a rate of about 60 every year. A release of any amount of material from propane trucks, under both normal transportation and transport accident conditions, is to be expected at a rate of about 110 per year. Releases from propane rail tank cars would occur about 40 times a year. However, only those releases that occur during a transportation accident or involve a major tank defect will include sufficient propane to present the potential for danger to the public. These significant releases can be expected at the lower rate of about fourteen events per year for truck transport and about one event every two years for rail tank car transport. The estimated number of public fatalities resulting from these significant releases in 1985 is fifteen. About eleven fatalities per year result from tank truck operation, and approximately half a death per year stems from the movement of propane in rail tank cars.

  3. Lean and ultralean stretched propane-air counterflow flames

    SciTech Connect (OSTI)

    Cheng, Zhongxian; Pitz, Robert W. [Mechanical Engineering Department, Vanderbilt University, Box 1592, Station B, Nashville, TN 37235 (United States); Wehrmeyer, Joseph A. [Aerospace Testing Alliance, Building 1099, Avenue C, Arnold Air Force Base, TN 37389 (United States)

    2006-06-15T23:59:59.000Z

    Stretched laminar flame structures for a wide range of C{sub 3}H{sub 8}-air mixtures vs hot products are investigated by laser-based diagnostics and numerical simulation. The hot products are produced by a lean H{sub 2}-air premixed flame. The effect of stretch rate and equivalence ratio on four groups of C{sub 3}H{sub 8}-air flame structures is studied in detail by Raman scattering measurements and by numerical calculations of the major species concentration and temperature profiles. The equivalence ratio, f, is varied from a near-stoichiometric condition (f=0.86) to the sublean limit (f=0.44) and the stretch rate varies from 90 s{sup -1} to near extinction. For most of these C{sub 3}H{sub 8}-air lean mixtures, hot products are needed to maintain the flame. The significant feature of these flames is the relatively low flame temperatures (1200-1800 K). For this temperature range, the predicted C{sub 3}H{sub 8}-air flame structure is sensitive to the specific chemical kinetic mechanism. Two types of flame structures (a lean self-propagating flame and a lean diffusion-controlled flame) are obtained based on the combined effect of stretch and equivalence ratio. Three different mechanisms, the M5 mechanism, the Optimized mechanism, and the San Diego mechanism, are chosen for the numerical simulations. None of the propane chemical mechanisms give good agreement with the data over the entire range of flame conditions. (author)

  4. Hydronic Heating Coil Versus Propane Furnace, Rehoboth Beach, Delaware (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-01-01T23:59:59.000Z

    Insight Homes constructed two houses in Rehoboth Beach, Delaware, with identical floor plans and thermal envelopes but different heating and domestic hot water (DHW) systems. Each house is 1,715-ft2 with a single story, three bedrooms, two bathrooms, and the heating, ventilation, and air conditioning (HVAC) systems and ductwork located in conditioned crawlspaces. The standard house, which the builder offers as its standard production house, uses an air source heat pump (ASHP) with supplemental propane furnace heating. The Building America test house uses the same ASHP unit with supplemental heat provided by the DHW heater (a combined DHW and hydronic heating system, where the hydronic heating element is in the air handler). Both houses were occupied during the test period. Results indicate that efficiency of the two heating systems was not significantly different. Three issues dominate these results; lower system design performance resulting from the indoor refrigerant coil selected for the standard house, an incorrectly functioning defrost cycle in the standard house, and the low resolution of the natural gas monitoring equipment. The thermal comfort of both houses fell outside the ASHRAE Standard 55 heating range but was within the ACCA room-to-room temperature range when compared to the thermostat temperature. The monitored DHW draw schedules were input into EnergyPlus to evaluate the efficiency of the tankless hot water heater model using the two monitored profiles and the Building America House Simulation Protocols. The results indicate that the simulation is not significantly impacted by the draw profiles.

  5. Dynamics of Propane in Silica Mesopores Formed upon PropyleneHydrogenation over Pt Nanoparticles by Time-Resolved FT-IRSpectroscopy

    SciTech Connect (OSTI)

    Waslylenko, Walter; Frei, Heinz

    2007-01-31T23:59:59.000Z

    Propylene hydrogenation over Pt nanoparticles supported onmesoporous silica type SBA-15 was monitored by time-resolved FT-IRspectroscopy at 23 ms resolution using short propylene gas pulses thatjoined a continuous flow of hydrogen in N2 (1 atm total pressure).Experiments were conducted in the temperature range 323-413 K. Propanewas formed within 100 milliseconds or faster. The CH stretching regionrevealed distinct bands for propane molecules emerging inside thenanoscale channels of the silica support. Spectral analysis gave thedistribution of the propane product between support and surrounding gasphase as function of time. Kinetic analysis showed that the escape ofpropane molecules from the channels occurred within hundreds ofmilliseconds (3.1 + 0.4 s-1 at 383 K). A steady state distribution ofpropane between gas phase and mesoporous support is established as theproduct is swept from the catalyst zone by the continuous flow ofhydrogen co-reactant. This is the first direct spectroscopic observationof emerging products of heterogeneous catalysis on nanoporous supportsunder reaction conditions.

  6. No. 2 heating oil/propane program 1994--1995. Final report

    SciTech Connect (OSTI)

    McBrien, J.

    1995-05-01T23:59:59.000Z

    During the 1994--95 heating season, the Massachusetts Division of Energy Resources (DOER) participated in a joint data collection program between several state energy offices and the federal Department of Energy`s (DOE) Energy Information Administration (EIA). The purpose of the program was to collect and monitor retail and wholesale heating oil and propane prices and inventories from October 1994 through March 1995. This program augmented the existing Massachusetts data collection system and served several important functions. The information helped the federal and state governments respond to consumer, congressional and media inquiries regarding No. 2 oil and propane. The information also provided policy decision-makers with timely, accurate and consistent data to monitor current heating oil and propane markets and develop appropriate state responses when necessary. In addition, the communication network between states and the DOE was strengthened through this program. This final report begins with an overview of the unique events that had an impact on the petroleum markets prior to and during the reporting period. Next, the report summarizes the results from residential heating oil and propane price surveys conducted by DOER over the 1994--95 heating season. The report also incorporates the wholesale heating oil and propane prices and inventories collected by EIA and distributed to the states. Finally, the report outlines DOER`s use of the data.

  7. No. 2 heating oil/propane program. Final report, 1992/93

    SciTech Connect (OSTI)

    McBrien, J.

    1993-05-01T23:59:59.000Z

    During the 1992--93 heating season, the Massachusetts Division Energy Resources (DOER) participated in a joint data collection program between several state energy offices and the federal Department of Energy`s (DOE) Energy Information Administration (EIA). The purpose of the program was to collect and monitor retail and wholesale heating oil and propane prices and inventories from October, 1992 through March, 1993. This final report begins with an overview of the unique events which had an impact on the petroleum markets prior to and during the reporting period. Next, the report summarizes the results from residential heating oil and propane price surveys conducted by DOER over the 1992--93 heating season. The report also incorporates the wholesale heating oil and propane prices and inventories collected by the EIA and distributed to the states. Finally, the report outlines DOER`s use of the data.

  8. Performance analysis of a series of hermetic reciprocating compressors working with R290 (propane) and R407C

    E-Print Network [OSTI]

    Fernández de Córdoba, Pedro

    Performance analysis of a series of hermetic reciprocating compressors working with R290 (propane Abstract In this paper, a series of compressors with different capacities and geometries working with propane as refrigerant are analyzed in terms of the compressor model developed by [E. Navarro, E. Granryd

  9. The determination of compressibility factors of gaseous propane-nitrogen mixtures 

    E-Print Network [OSTI]

    Dickson, Cecil Herman

    1955-01-01T23:59:59.000Z

    LIBRARY A A N O'iLLEOE OF 1EXAS THE DETERMINATION OF COMPRESSIBILITY FACTORS OF GASEOUS PROPANE-NITROGEIN MIXTURES A Thesis Cecil Herman Dickson Submitted to the Graduate School of the Agricultural and Mechanical College of' Texas in partial... f'ulf'illment of the requirements for the de~ree of MASTER OF SCIENCE Ma]or GubjectI Chemistry May I&55 THE DETERMINATION OF COMPRESSIBILITY FACTORS OF GASEOUS PROPANE-NITROGEN MIXTURES A Thesis Cecil Herman Dickson Approved as to style...

  10. The determination of compressibility factors of gaseous propane-nitrogen mixtures

    E-Print Network [OSTI]

    Dickson, Cecil Herman

    1955-01-01T23:59:59.000Z

    LIBRARY A A N O'iLLEOE OF 1EXAS THE DETERMINATION OF COMPRESSIBILITY FACTORS OF GASEOUS PROPANE-NITROGEIN MIXTURES A Thesis Cecil Herman Dickson Submitted to the Graduate School of the Agricultural and Mechanical College of' Texas in partial... f'ulf'illment of the requirements for the de~ree of MASTER OF SCIENCE Ma]or GubjectI Chemistry May I&55 THE DETERMINATION OF COMPRESSIBILITY FACTORS OF GASEOUS PROPANE-NITROGEN MIXTURES A Thesis Cecil Herman Dickson Approved as to style...

  11. SUR LA POSSIBILIT D'UTILISATION D'UNE CHAMBRE A BULLES A PROPANE POUR L'TUDE DES RACTIONS NUCLAIRES

    E-Print Network [OSTI]

    Boyer, Edmond

    175 A. SUR LA POSSIBILITÉ D'UTILISATION D'UNE CHAMBRE A BULLES A PROPANE POUR L'ÉTUDE DES RÉACTIONS. - Mise au point et étude des caractéristiques du fonctionnement d'une chambre à bulles à propane de 6 135 MeV. Abstract. 2014 Adjustment and studies of some characteristics of a 6 litre propane bubble

  12. Single-Site Vanadyl Activation, Functionalization, and Reoxidation Reaction Mechanism for Propane Oxidative Dehydrogenation on the Cubic V4O10 Cluster

    E-Print Network [OSTI]

    Goddard III, William A.

    Single-Site Vanadyl Activation, Functionalization, and Reoxidation Reaction Mechanism for Propane of density functional theory) to examine the detailed mechanism for propane reacting with a V4O10 cluster to model the catalytic oxidative dehydrogenation (ODH) of propane on the V2O5(001) surface. We here report

  13. Structure and critical function of Fe and acid sites in Fe-ZSM-5 in propane oxidative dehydrogenation with N2O and N2O decomposition

    E-Print Network [OSTI]

    Sklenak, Stepan

    Structure and critical function of Fe and acid sites in Fe-ZSM-5 in propane oxidative species Steamed Fe-zeolites Mössbauer spectroscopy UV­Vis FTIR H2-TPR N2O decomposition Propane oxidative of propane to propene with N2O. The evacuated non-steamed FeH-ZSM-5 contained high concentration of Brønsted

  14. TECHNICAL JUSTIFICATION FOR CHOOSING PROPANE AS A CALIBRATION AGENT FOR TOTAL FLAMMABLE VOLATILE ORGANIC COMPOUND (VOC) DETERMINATIONS

    SciTech Connect (OSTI)

    DOUGLAS, J.G.

    2006-07-06T23:59:59.000Z

    This document presents the technical justification for choosing and using propane as a calibration standard for estimating total flammable volatile organic compounds (VOCs) in an air matrix. A propane-in-nitrogen standard was selected based on a number of criteria: (1) has an analytical response similar to the VOCs of interest, (2) can be made with known accuracy and traceability, (3) is available with good purity, (4) has a matrix similar to the sample matrix, (5) is stable during storage and use, (6) is relatively non-hazardous, and (7) is a recognized standard for similar analytical applications. The Waste Retrieval Project (WRP) desires a fast, reliable, and inexpensive method for screening the flammable VOC content in the vapor-phase headspace of waste containers. Table 1 lists the flammable VOCs of interest to the WRP. The current method used to determine the VOC content of a container is to sample the container's headspace and submit the sample for gas chromatography--mass spectrometry (GC-MS) analysis. The driver for the VOC measurement requirement is safety: potentially flammable atmospheres in the waste containers must be allowed to diffuse prior to processing the container. The proposed flammable VOC screening method is to inject an aliquot of the headspace sample into an argon-doped pulsed-discharge helium ionization detector (Ar-PDHID) contained within a gas chromatograph. No actual chromatography is performed; the sample is transferred directly from a sample loop to the detector through a short, inert transfer line. The peak area resulting from the injected sample is proportional to the flammable VOC content of the sample. However, because the Ar-PDHID has different response factors for different flammable VOCs, a fundamental assumption must be made that the agent used to calibrate the detector is representative of the flammable VOCs of interest that may be in the headspace samples. At worst, we desire that calibration with the selected calibrating agent overestimate the value of the VOCs in a sample. By overestimating the VOC content of a sample, we want to minimize false negatives. A false negative is defined as incorrectly estimating the VOC content of the sample to be below programmatic action limits when, in fact, the sample,exceeds the action limits. The disadvantage of overestimating the flammable VOC content of a sample is that additional cost may be incurred because additional sampling and GC-MS analysis may be required to confirm results over programmatic action limits. Therefore, choosing an appropriate calibration standard for the Ar-PDHID is critical to avoid false negatives and to minimize additional analytical costs.

  15. Giant strain with ultra-low hysteresis and high temperature stability in grain oriented lead-free K???Bi???TiO?-BaTiO?-Na???Bi???TiO? piezoelectric materials

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Maurya, Deepam; Zhou, Yuan; Wang, Yaojin; Yan, Yongke; Li, Jiefang; Viehland, Dwight; Priya, Shashank

    2015-02-26T23:59:59.000Z

    We synthesized grain-oriented lead-free piezoelectric materials in (K???Bi???TiO?-BaTiO?-xNa???Bi???TiO? (KBT-BT-NBT) system with high degree of texturing along the [001]c (c-cubic) crystallographic orientation. We demonstrate giant field induced strain (~0.48%) with an ultra-low hysteresis along with enhanced piezoelectric response (d?? ~ 190pC/N) and high temperature stability (~160°C). Transmission electron microscopy (TEM) and piezoresponse force microscopy (PFM) results demonstrate smaller size highly ordered domain structure in grain-oriented specimen relative to the conventional polycrystalline ceramics. The grain oriented specimens exhibited a high degree of non-180° domain switching, in comparison to the randomly axed ones. These results indicate the effective solution to the lead-free piezoelectricmore »materials.« less

  16. Simulation studies of steam-propane injection for the Hamaca heavy oil field 

    E-Print Network [OSTI]

    Venturini, Gilberto Jose

    2002-01-01T23:59:59.000Z

    Simulation studies were performed to evaluate a novel technology, steam-propane injection, for the heavy Hamaca crude oil. The oil has a gravity of 9.3?API and a viscosity of 25,000 cp at 50?C. Two types of simulation studies were performed: a...

  17. Metallurgical failure analysis of a propane tank boiling liquid expanding vapor explosion (BLEVE).

    SciTech Connect (OSTI)

    Kilgo, Alice C.; Eckelmeyer, Kenneth Hall; Susan, Donald Francis

    2005-01-01T23:59:59.000Z

    A severe fire and explosion occurred at a propane storage yard in Truth or Consequences, N.M., when a truck ran into the pumping and plumbing system beneath a large propane tank. The storage tank emptied when the liquid-phase excess flow valve tore out of the tank. The ensuing fire engulfed several propane delivery trucks, causing one of them to explode. A series of elevated-temperature stress-rupture tears developed along the top of a 9800 L (2600 gal) truck-mounted tank as it was heated by the fire. Unstable fracture then occurred suddenly along the length of the tank and around both end caps, along the girth welds connecting the end caps to the center portion of the tank. The remaining contents of the tank were suddenly released, aerosolized, and combusted, creating a powerful boiling liquid expanding vapor explosion (BLEVE). Based on metallography of the tank pieces, the approximate tank temperature at the onset of the BLEVE was determined. Metallurgical analysis of the ruptured tank also permitted several hypotheses regarding BLEVE mechanisms to be evaluated. Suggestions are made for additional work that could provide improved predictive capabilities regarding BLEVEs and for methods to decrease the susceptibility of propane tanks to BLEVEs.

  18. Simulation studies of steam-propane injection for the Hamaca heavy oil field

    E-Print Network [OSTI]

    Venturini, Gilberto Jose

    2002-01-01T23:59:59.000Z

    Simulation studies were performed to evaluate a novel technology, steam-propane injection, for the heavy Hamaca crude oil. The oil has a gravity of 9.3?API and a viscosity of 25,000 cp at 50?C. Two types of simulation studies were performed: a...

  19. Novel Pt/Mg(In)(Al)O catalysts for ethane and propane dehydrogenation

    SciTech Connect (OSTI)

    Sun, Pingping; Siddiqi, Georges; Vining, William C.; Chi, Miaofang; Bell, Alexis T. (UCB); (ORNL)

    2011-10-28T23:59:59.000Z

    Catalysts for the dehydrogenation of light alkanes were prepared by dispersing Pt on the surface of a calcined hydrotalcite-like support containing indium, Mg(In)(Al)O. Upon reduction in H{sub 2} at temperatures above 673 K, bimetallic particles of PtIn are observed by TEM, which have an average diameter of 1 nm. Analysis of Pt LIII-edge extended X-ray absorption fine structure (EXAFS) data shows that the In content of the bimetallic particles increases with increasing bulk In/Pt ratio and reduction temperature. Pt LIII-edge X-ray absorption near edge structure (XANES) indicates that an increasing donation of electronic charge from In to Pt occurs with increasing In content in the PtIn particles. The activity and selectivity of the Pt/Mg(In)(Al)O catalysts for ethane and propane dehydrogenation reactions are strongly dependent on the bulk In/Pt ratio. For both reactants, maximum activity was achieved for a bulk In/Pt ratio of 0.48, and at this In/Pt ratio, the selectivity to alkene was nearly 100%. Coke deposition was observed after catalyst use for either ethane or propane dehydrogenation, and it was observed that the alloying of Pt with In greatly reduced the amount of coke deposited. Characterization of the deposit by Raman spectroscopy indicates that the coke is present as highly disordered graphite particles <30 nm in diameter. While the amount of coke deposited during ethane and propane dehydrogenation are comparable, the effects on activity are dependent on reactant composition. Coke deposition had no effect on ethane dehydrogenation activity, but caused a loss in propane dehydrogenation activity. This difference is attributed to the greater ease with which coke produced on the surface of PtIn nanoparticles migrates to the support during ethane dehydrogenation versus propane dehydrogenation.

  20. UTILITIES PROBLEMS AND FAILURES Electrical or plumbing failure/Flooding/Water leak/Natural gas

    E-Print Network [OSTI]

    Fernandez, Eduardo

    UTILITIES PROBLEMS AND FAILURES Electrical or plumbing failure/Flooding/Water leak/Natural gas for electrical shock. NOTIFY University Police. What should I do if I smell natural or propane gas? LEAVE/Repair line, 7-6333, or CALL the Campus University Police or Security at (561) 297-3500 or 911

  1. Design and Operation of the Synthesis Gas Generator System for Reformed Propane and Glycerin Combustion

    E-Print Network [OSTI]

    Pickett, Derek

    2013-12-31T23:59:59.000Z

    110.6 million barrels per day by 2030 [1]. One possible source of alternative fuel, biodiesel, can be derived from biomass feedstocks (e.g., soybean). This bio-based diesel can augment or replace petroleum based diesel with little to no modifications...

  2. Alternative Fuels Data Center: Airport Shuttles Run on Propane

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProducts (VAP)MassachusettsExperimental VehicleNatural GasVehicleTexasAirport

  3. Thermophysical property predictions of propane, propylene and their mixtures by Benedict-Webb-Rubin type equations of state 

    E-Print Network [OSTI]

    Bengani, Pramod Kumar

    1990-01-01T23:59:59.000Z

    THERMOPHYSICAL PROPERTY PREDICTIONS OF PROPANE, PROPYLENE AND THEIR MIXTURES BY BENEDICT-WEBB-RUBIN TYPE EQUATIONS OF STATE A Thesis by PRAMOD KUMAR BENGANI Submitted to the Office of Graduate Studies of Texas A & M University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE December 1990 Major Subject: Chemical Engineering THERMOPHYSICAL PROPERTY PREDICTIONS OF PROPANE, PROPYLENE AND THEIR MIXTURES BY BENEDICT-WEBB-RUBIN TYPE EQUATIONS OF STATE A Thesis...

  4. Experimental and analytical studies of hydrocarbon yields under dry-, steam-, and steam with propane-distillation

    E-Print Network [OSTI]

    Ramirez Garnica, Marco Antonio

    2004-09-30T23:59:59.000Z

    from Instituto Mexicano del Petróleo (IMP), Dr. Fernando Rodriguez de la Garza, and Dr. Jose Luis Sanchez Bujanos from Petróleos Mexicanos (PEMEX), and Lawyer Rolando Rueda de Leon from Diario de Mexico, for their help and valuable advice. I would...-, and Steam with Propane-Distillation. (May 2004) Marco Antonio Ramírez-Garnica, B.S., Instituto Politécnico Nacional; M.S., Instituto Politécnico Nacional, México Chair of Advisory Committee: Dr. Daulat D. Mamora Recent experimental and simulation...

  5. Accurate gamma and MeV-electron track reconstruction with an ultra-low diffusion Xenon/TMA TPC at 10 atmospheres

    E-Print Network [OSTI]

    Gonzalez-Diaz, Diego; Borges, F I G; Camargo, M; Carcel, S; Cebrian, S; Cervera, A; Conde, C A N; Dafni, T; Diaz, J; Esteve, R; Fernandes, L M P; Ferrario, P; Ferreira, A L; Freitas, E D C; Gehman, V M; Goldschmidt, A; Gomez-Cadenas, J J; Gutierrez, R M; Hauptman, J; Morata, J A Hernando; Herrera, D C; Irastorza, I G; Labarga, L; Laing, A; Liubarsky, I; Lopez-March, N; Lorca, D; Losada, M; Luzon, G; Mari, A; Martin-Albo, J; Martinez-Lema, G; Martinez, A; Miller, T; Monrabal, F; Monserrate, M; Monteiro, C M B; Mora, F J; Moutinho, L M; Vidal, J Munoz; Nebot-Guinot, M; Nygren, D; Oliveira, C A B; Perez, J; Aparicio, J L Perez; Querol, M; Renner, J; Ripoll, L; Rodriguez, J; Santos, F P; Santos, J M F dos; Serra, L; Shuman, D; Simon, A; Sofka, C; Sorel, M; Toledo, J F; Torrent, J; Tsamalaidze, Z; Veloso, J F C A; Villar, J A; Webb, R; White, J T; Yahlali, N; Azevedo, C; Aznar, F; Calvet, D; Castel, J; Ferrer-Ribas, E; Garcia, J A; Giomataris, I; Gomez, H; Iguaz, F J; Lagraba, A; Coguie, A Le; Mols, J P; Sahin,  O; Rodriguez, A; Ruiz-Choliz, E; Segui, L; Tomas, A; Veenhof, R

    2015-01-01T23:59:59.000Z

    We report the performance of a 10 atm Xenon/trimethylamine time projection chamber (TPC) for the detection of X-rays (30 keV) and gamma-rays (0.511-1.275 MeV) in conjunction with the accurate tracking of the associated electrons. When operated at such a high pressure and in 1%-admixtures, trimethylamine (TMA) endows Xenon with an extremely low electron diffusion (1.3 +-0.13 mm-sigma (longitudinal), 0.8 +-0.15 mm-sigma (transverse) along 1 m drift) besides forming a convenient Penning-Fluorescent mixture. The TPC, that houses 1.1 kg of gas in its active volume, operated continuously for 100 live-days in charge amplification mode. The readout was performed through the recently introduced microbulk Micromegas technology and the AFTER chip, providing a 3D voxelization of 8mm x 8mm x 1.2mm for approximately 10 cm/MeV-long electron tracks. This work was developed as part of the R&D program of the NEXT collaboration for future detector upgrades in the search of the 0bbnu decay in 136Xe, specifically those based ...

  6. California Food Processing Industry Wastewater Demonstration Project: Phase I Final Report

    E-Print Network [OSTI]

    Lewis, Glen

    2010-01-01T23:59:59.000Z

    report electricity, natural gas and propane usage and directetc. ), facility natural gas and propane usage. Integrate

  7. Advanced gas engine cogeneration technology for special applications

    SciTech Connect (OSTI)

    Plohberger, D.C.; Fessl, T.; Gruber, F.; Herdin, G.R. [Jenbacher Energiesystem AG, Jenbach (Austria)

    1995-10-01T23:59:59.000Z

    In recent years gas Otto-cycle engines have become common for various applications in the field of power and heat generation. Gas engines are chosen sometimes even to replace diesel engines, because of their clean exhaust emission characteristics and the ample availability of natural gas in the world. The Austrian Jenbacher Energie Systeme AG has been producing gas engines in the range of 300 to 1,600 kW since 1960. The product program covers state-of-the-art natural gas engines as well as advanced applications for a wide range of alterative gas fuels with emission levels comparable to Low Emission (LEV) and Ultra Low Emission Vehicle (ULEV) standards. In recent times the demand for special cogeneration applications is rising. For example, a turnkey cogeneration power plant for a total 14.4 MW electric power and heat output consisting of four JMS616-GSNLC/B spark-fired gas engines specially tuned for high altitude operation has been delivered to the well-known European ski resort of Sestriere. Sestriere is situated in the Italian Alps at an altitude of more than 2,000 m above sea level. The engines feature a turbocharging system tuned to an ambient air pressure of only 80 kPa to provide an output and efficiency of each 1.6 MW and up to 40% {at} 1,500 rpm, respectively. The ever-increasing demand for lower pollutant emissions in the US and some European countries initiates developments in new exhaust aftertreatment technologies. Thermal reactor and Selective Catalytic Reduction (SCR) systems are used to reduce tailpipe CO and NO{sub x} emissions of engines. Both SCR and thermal reactor technology will shift the engine tuning to achieve maximum efficiency and power output. Development results are presented, featuring the ultra low emission potential of biogas and natural gas engines with exhaust aftertreatment.

  8. Landfill Gas Fueled HCCI Demonstration System

    E-Print Network [OSTI]

    Blizman, Brandon J.; Makel, Darby B.; Mack, John Hunter; Dibble, Robert W.

    2006-01-01T23:59:59.000Z

    chemical- kinetic model of propane HCCI combustion,” SAEof a four-cylinder 1.9 l propane- fueled homogeneous chargethe fuel line can use propane from a tank and NG from the

  9. Utah Natural Gas Number of Gas and Gas Condensate Wells (Number of

    U.S. Energy Information Administration (EIA) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5 Tables July 1996 Energy Information Administration Office ofthroughYear JanYear JanPropane, No.1Decade Year-0 Year-1Elements) Gas

  10. Alternative Fuels Data Center: Michigan School Buses Get Rolling on Propane

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels CleanReduce OperatingPropane inMichigan School

  11. Alternative Fuels Data Center: Propane Rolls on as Reliable Fleet Fuel

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWP TWP RelatedCellulaseFuels andConversionsAssumptionsBenefitsPropane

  12. Search for 2{nu}{beta}{beta} Decay of {sup 130}Te to the First Excited State of {sup 130}Xe with an Ultra-Low-Background Germanium Crystal Array

    SciTech Connect (OSTI)

    Mizouni, L. K. [Pacific Northwest National Laboratory, P.O. Box 999, Richland WA 99352 (United States); University of South Carolina, 712 Main St., Columbia, SC 29208 (United States); Aalseth, C. E.; Erikson, L. E.; Hossbach, T. W.; Keillor, M. E.; Orrell, J. L. [Pacific Northwest National Laboratory, P.O. Box 999, Richland WA 99352 (United States); Avignone, F. T. III [University of South Carolina, 712 Main St., Columbia, SC 29208 (United States)

    2011-12-13T23:59:59.000Z

    The goal of searching for zero-neutrino double-beta (0{nu}{beta}{beta}) decay is to probe an absolute neutrino mass scale suggested by the mass-splitting parameters observed by neutrino oscillation experiments. Furthermore, observation of 0{nu}{beta}{beta} decay is an explicit instance of Lepton-number non-conservation. A sensitive measurement of two-neutrino double-beta (2{nu}{beta}{beta}) decay can provide critical input to Quasiparticle Random Phase Approximation (QRPA) calculations of the nuclear matrix elements in models similar to those used to extract the absolute neutrino mass from (0{nu}{beta}{beta}) decay experiments. Tellurium-130, an even-even nucleus, can undergo 2{nu}{beta}{beta} decay to the first 0+ excited state of {sup 130}Xe producing three possible {gamma}-ray cascades as it transitions to the ground state. The Cascades detector is a high purity germanium (HPGe) crystal array consisting of two ultra-low-background copper cryostats each housing a hexagonal array of seven crystals. The project is currently being developed at Pacific Northwest National Laboratory in Richland, WA (USA), and aims to obtain very high {gamma}-ray detection efficiency while utilizing highly effective and low-background shielding. GEANT4 simulations of the detector are performed for a {sup 130}Te sample in order to determine the optimum size and geometry of the source for maximum detection efficiency and predict its sensitivity for measuring 2{nu}{beta}{beta} decay to the first 0+ excited state of {sup 130}Xe. These simulations are validated with calibration sources and presented.

  13. Combustion: What is the Lower Heating Value (LHV) of Propane? Before we start: how reasonable is the use of the LHV? What is the dewpoint of the reaction products?

    E-Print Network [OSTI]

    Combustion: What is the Lower Heating Value (LHV) of Propane? Before we start: how reasonable temperature we can achieve with a propane-and-air blowtorch? We repeat this calculation for several different

  14. Analysis of ignition behavior in a turbocharged direct injection dual fuel engine using propane and methane as primary fuels

    SciTech Connect (OSTI)

    Polk, A. C.; Gibson, C. M.; Shoemaker, N. T.; Srinivasan, K. K.; Krishnan, S. R.

    2011-10-05T23:59:59.000Z

    This paper presents experimental analyses of the ignition delay (ID) behavior for diesel-ignited propane and diesel-ignited methane dual fuel combustion. Two sets of experiments were performed at a constant speed (1800 rev/min) using a 4-cylinder direct injection diesel engine with the stock ECU and a wastegated turbocharger. First, the effects of fuel-air equivalence ratios (���© pilot �¢���¼ 0.2-0.6 and ���© overall �¢���¼ 0.2-0.9) on IDs were quantified. Second, the effects of gaseous fuel percent energy substitution (PES) and brake mean effective pressure (BMEP) (from 2.5 to 10 bar) on IDs were investigated. With constant ���© pilot (> 0.5), increasing ���© overall with propane initially decreased ID but eventually led to premature propane autoignition; however, the corresponding effects with methane were relatively minor. Cyclic variations in the start of combustion (SOC) increased with increasing ���© overall (at constant ���© pilot), more significantly for propane than for methane. With increasing PES at constant BMEP, the ID showed a nonlinear (initially increasing and later decreasing) trend at low BMEPs for propane but a linearly decreasing trend at high BMEPs. For methane, increasing PES only increased IDs at all BMEPs. At low BMEPs, increasing PES led to significantly higher cyclic SOC variations and SOC advancement for both propane and methane. Finally, the engine ignition delay (EID) was also shown to be a useful metric to understand the influence of ID on dual fuel combustion.

  15. Ultra Low Power Bioelectronics Fundamentals, Biomedical Applications,

    E-Print Network [OSTI]

    Sarpeshkar, Rahul

    York, Melbourne, Madrid, Cape Town, Singapore, Sa~ o Paulo, Delhi, Tokyo, Mexico City Cambridge that apply to biology or to electronics, to analog or to digital systems, to electrical or to non-electrical, the net power consumption of a single human cell is an astoundingly low 0.8 pW! The

  16. Utilizing Supplemental Ultra-Low-NO

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ULN burner technology into a Capstone C65 (65 kW) microturbine and a 100 HP heat recovery boiler by Johnston Boiler Company. Barriers The project seeks to overcome the...

  17. Utilizing Supplemental Ultra-Low-NO

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your DensityEnergy U.S.-China Electric Vehicle and03/02 TUE 08:59 FAXFactEnergyEnergyVOCsSupplemental

  18. The catalytic oxidation of propane and propylene with air: total aldehyde production and selectivity at low conversions. 

    E-Print Network [OSTI]

    Looney, Franklin Sittig

    1950-01-01T23:59:59.000Z

    ~ Ths writer is izntebteg to pr, P G~ ~och Tor his assistance azsi guidance in this work aC to Br~ J+ 9 Kinds Tor his aery. suggestions eel Succor~ a The oxidation cf propane~ propylene and prcya~cregyimm mbetccres ctver a ~ aiucdna ~st in a flew... formation of aldehyde fran pure grade propane The ~ce of Within the range of variables of this investigation and with propylene ~& aldehyde pr~cn was f'ennd to bs independent of" residence Qorrcgations relating aldehyde pressure to ~ and cncygsn pressure...

  19. Shock tube and theoretical studies on the thermal decomposition of propane : evidence for a roaming radical channel.

    SciTech Connect (OSTI)

    Sivaramakrishnan, R.; Su, M.-C.; Michael, J. V.; Klippenstein, S. J.; Harding, L. B.; Ruscic, B. (Chemical Sciences and Engineering Division)

    2011-04-21T23:59:59.000Z

    The thermal decomposition of propane has been studied using both shock tube experiments and ab initio transition state theory-based master equation calculations. Dissociation rate constants for propane have been measured at high temperatures behind reflected shock waves using high-sensitivity H-ARAS detection and CH{sub 3} optical absorption. The two major dissociation channels at high temperature are C{sub 3}H{sub 8} {yields} CH{sub 3} + C{sub 2}H{sub 5} (eq 1a) and C{sub 3}H{sub 8} {yields} CH{sub 4} + C{sub 2}H{sub 4} (eq 1b). Ultra high-sensitivity ARAS detection of H-atoms produced from the decomposition of the product, C{sub 2}H{sub 5}, in (1a), allowed measurements of both the total decomposition rate constants, k{sub total}, and the branching to radical products, k{sub 1a}/k{sub total}. Theoretical analyses indicate that the molecular products are formed exclusively through the roaming radical mechanism and that radical products are formed exclusively through channel 1a. The experiments were performed over the temperature range 1417-1819 K and gave a minor contribution of (10 {+-} 8%) due to roaming. A multipass CH{sub 3} absorption diagnostic using a Zn resonance lamp was also developed and characterized in this work using the thermal decomposition of CH{sub 3}I as a reference reaction. The measured rate constants for CH{sub 3}I decomposition agreed with earlier determinations from this laboratory that were based on I-atom ARAS measurements. This CH{sub 3} diagnostic was then used to detect radicals from channel 1a allowing lower temperature (1202-1543 K) measurements of k1a to be determined. Variable reaction coordinate-transition state theory was used to predict the high pressure limits for channel (1a) and other bond fission reactions in C{sub 3}H{sub 8}. Conventional transition state theory calculations were also used to estimate rate constants for other tight transition state processes. These calculations predict a negligible contribution (<1%) from all other bond fission and tight transition state processes, indicating that the bond fission channel (1a) and the roaming channel (1b) are indeed the only active channels at the temperature and pressure ranges of the present experiments. The predicted reaction exo- and endothermicities are in excellent agreement with the current version of the Active Thermochemical Tables. Master equation calculations incorporating these transition state theory results yield predictions for the temperature and pressure dependence of the dissociation rate constants for channel 1a. The final theoretical results reliably reproduce the measured dissociation rate constants that are reported here and in the literature. The experimental data are well reproduced over the 500-2500 K and 1 x 10{sup -4} to 100 bar range (errors of {approx}15% or less) by the following Troe parameters for Ar as the bath gas: k{sub {infinity}} = 1.55 x 10{sup 24}T{sup -2.034} exp(-45490/T) s{sup -1}, k{sub 0} = 7.92 x 10{sup 53}T{sup -16.67} exp(-50380/T) cm{sup 3} s{sup -1}, and F{sub c} = 0.190 exp(-T/3091) + 0.810 exp(-T/128) + exp(-8829/T).

  20. State Heating Oil and Propane Program, 1990--1991 heating season. Final technical report

    SciTech Connect (OSTI)

    Not Available

    1991-06-06T23:59:59.000Z

    The following discussion summarizes the survey approach and results of the Department of Public Service`s survey of retail fuel oil and propane prices during the 1990--91 heating season. The semi-monthly phone surveys were conducted in cooperation with the US Department of Energy`s State Fuel Oil and Propane Program, which coordinated surveys of heating fuel prices by 25 eastern and midwest states. This federal/state program serves as a method for fast collection, analysis, and dissemination of information on current residential prices. No other information source meets needs for timely retail price information over the course of the heating season. For the 1990--91 heating season, the Minnesota Department of Public Service (MN/DPS) expanded the scope of its survey effort to include regional price data. Surveys were conducted with 160 retailers, including 59 respondents from the DOE samples, to provide a reasonable sample size for each region. Fuel oil retailers were also asked for updates on their secondary inventory levels.

  1. State Heating Oil and Propane Program, 1990--1991 heating season

    SciTech Connect (OSTI)

    Not Available

    1991-06-06T23:59:59.000Z

    The following discussion summarizes the survey approach and results of the Department of Public Service's survey of retail fuel oil and propane prices during the 1990--91 heating season. The semi-monthly phone surveys were conducted in cooperation with the US Department of Energy's State Fuel Oil and Propane Program, which coordinated surveys of heating fuel prices by 25 eastern and midwest states. This federal/state program serves as a method for fast collection, analysis, and dissemination of information on current residential prices. No other information source meets needs for timely retail price information over the course of the heating season. For the 1990--91 heating season, the Minnesota Department of Public Service (MN/DPS) expanded the scope of its survey effort to include regional price data. Surveys were conducted with 160 retailers, including 59 respondents from the DOE samples, to provide a reasonable sample size for each region. Fuel oil retailers were also asked for updates on their secondary inventory levels.

  2. A simulation study of steam and steam-propane injection using a novel smart horizontal producer to enhance oil production 

    E-Print Network [OSTI]

    Sandoval Munoz, Jorge Eduardo

    2004-11-15T23:59:59.000Z

    A 3D 8-component thermal compositional simulation study has been performed to evaluate the merits of steam-propane injection and a novel vertical-smart horizontal well system for the Lombardi reservoir in the San Ardo field, California. The novel...

  3. High-temperature ignition of propane with MTBE as an additive: Shock-tube experiments and modeling

    SciTech Connect (OSTI)

    Gray, J.A. (Sandia National Labs., Livermore, CA (United States)); Westbrook, C.K. (Lawrence Livermore National Lab., CA (United States))

    1991-01-01T23:59:59.000Z

    Ignition of propane has been studied in a shock tube and by computational modeling to determine the effect of methyl tert-butyl ether (MTBE) as a fuel additive. MTBE and isobutene were added in amounts up to 25% of the fuel to propane-oxygen-argon mixtures in shock-tube experiments covering a range of temperatures between 1450 and 1800 K. Ignition delays were measured from chemiluminescence at 432 nm due to excited CH radicals. The temperature dependence of the ignition rates was analyzed to yield Arrhenius parameters of E{sub a}{approximately}40 kcal/mol and log (A){approximately} 9.0 sec{sup {minus}1} for the overall reaction. Reactions involving MTBE and its decomposition products were combined with an established propane mechanism in a numerical model to describe the kinetic interaction of this additive with a typical hydrocarbon fuel. The experiments and the kinetic model both show that MTBE and isobutene retard propane ignition with nearly equal efficiency. The kinetic model demonstrates that isobutene kinetics are responsible for inhibition by both MTBE and isobutene, and the specific elementary reactions which produce this behavior are identified.

  4. High-temperature ignition of propane with MTBE as an additive: Shock-tube experiments and modeling. Revision 1

    SciTech Connect (OSTI)

    Gray, J.A. [Sandia National Labs., Livermore, CA (United States); Westbrook, C.K. [Lawrence Livermore National Lab., CA (United States)

    1991-12-01T23:59:59.000Z

    Ignition of propane has been studied in a shock tube and by computational modeling to determine the effect of methyl tert-butyl ether (MTBE) as a fuel additive. MTBE and isobutene were added to amounts up to 25% of the fuel to propane-oxygen-argon mixtures to shock-tube experiments covering a range of temperatures between 1450 and 1800 K. Ignition delays were measured from chemiluminescence at 432 nm due to excited CH radicals. The temperature dependence of the ignition rates was analyzed to yield Arrhenium parameters of E{sub a}{sup {minus}}40 kcal/mol and log(A) {sup {minus}}9.0 sec{sup {minus}1} for the overall reaction. Reactions involving MTBE and its decomposition products were combined with an established propane mechanism in a numerical model to describe the kinetic interaction of this additive with a typical hydrocarbon fuel. The experiments and the kinetic model both show that MTBE and isobutene retard propane ignition with nearly equal efficiency. The kinetic model demonstrates that isobutene kinetics are responsible for inhibition by both MTBE and isobutene, and the specific elementary reactions which produce this behavior are identified. 19 refs., 1 fig., 3 tabs.

  5. High-temperature ignition of propane with MTBE as an additive: Shock-tube experiments and modeling

    SciTech Connect (OSTI)

    Gray, J.A. [Sandia National Labs., Livermore, CA (United States); Westbrook, C.K. [Lawrence Livermore National Lab., CA (United States)

    1991-12-31T23:59:59.000Z

    Ignition of propane has been studied in a shock tube and by computational modeling to determine the effect of methyl tert-butyl ether (MTBE) as a fuel additive. MTBE and isobutene were added in amounts up to 25% of the fuel to propane-oxygen-argon mixtures in shock-tube experiments covering a range of temperatures between 1450 and 1800 K. Ignition delays were measured from chemiluminescence at 432 nm due to excited CH radicals. The temperature dependence of the ignition rates was analyzed to yield Arrhenius parameters of E{sub a}{approximately}40 kcal/mol and log (A){approximately} 9.0 sec{sup {minus}1} for the overall reaction. Reactions involving MTBE and its decomposition products were combined with an established propane mechanism in a numerical model to describe the kinetic interaction of this additive with a typical hydrocarbon fuel. The experiments and the kinetic model both show that MTBE and isobutene retard propane ignition with nearly equal efficiency. The kinetic model demonstrates that isobutene kinetics are responsible for inhibition by both MTBE and isobutene, and the specific elementary reactions which produce this behavior are identified.

  6. High-temperature ignition of propane with MTBE as an additive: Shock-tube experiments and modeling

    SciTech Connect (OSTI)

    Gray, J.A. (Sandia National Labs., Livermore, CA (United States)); Westbrook, C.K. (Lawrence Livermore National Lab., CA (United States))

    1991-12-01T23:59:59.000Z

    Ignition of propane has been studied in a shock tube and by computational modeling to determine the effect of methyl tert-butyl ether (MTBE) as a fuel additive. MTBE and isobutene were added to amounts up to 25% of the fuel to propane-oxygen-argon mixtures to shock-tube experiments covering a range of temperatures between 1450 and 1800 K. Ignition delays were measured from chemiluminescence at 432 nm due to excited CH radicals. The temperature dependence of the ignition rates was analyzed to yield Arrhenium parameters of E{sub a}{sup {minus}}40 kcal/mol and log(A) {sup {minus}}9.0 sec{sup {minus}1} for the overall reaction. Reactions involving MTBE and its decomposition products were combined with an established propane mechanism in a numerical model to describe the kinetic interaction of this additive with a typical hydrocarbon fuel. The experiments and the kinetic model both show that MTBE and isobutene retard propane ignition with nearly equal efficiency. The kinetic model demonstrates that isobutene kinetics are responsible for inhibition by both MTBE and isobutene, and the specific elementary reactions which produce this behavior are identified. 19 refs., 1 fig., 3 tabs.

  7. Optimized design of a heat exchanger for an air-to-water reversible heat pump working with propane (R290)

    E-Print Network [OSTI]

    Fernández de Córdoba, Pedro

    Optimized design of a heat exchanger for an air-to-water reversible heat pump working with propane-to-water reversible heat pump unit was carried out using two different fin-and-tube heat exchanger ``coil'' designs concepts. The performance of the heat pump was evaluated for each coil design at different superheat

  8. Studies of n-Propanol, iso-Propanol, and Propane Flames

    SciTech Connect (OSTI)

    Veloo, Peter S.; Egolfopoulos, Fokion N.

    2011-01-01T23:59:59.000Z

    The phenomena of propagation and extinction of flames of saturated C{sub 3} alcohols and propane were studied experimentally and numerically in order to assess the effects of the presence and location of the hydroxyl radical in the fuel molecular structure. The experiments were carried out in the counterflow configuration under atmospheric pressure and for unreacted fuel-carrying stream temperature of 343 K. The simulations included detailed descriptions of molecular transport and chemical kinetics using a recently developed kinetic model for C{sub 3} alcohols. The experimental results revealed that the laminar flame speeds and extinction strain rates of n-propanol/air and propane/air flames are close to each other whereas those of iso-propanol/air flames are consistently lower. Similar behavior was observed also for the extinction strain rates of non-premixed n-propanol and iso-propanol flames. It was shown through sensitivity and reaction path analyses that there are two major differences between the intermediates of n-propanol/air and iso-propanol/air flames. In iso-propanol/air flames there are notably higher concentrations of propene whose consumption pathway results in the relatively unreactive allyl radicals, retarding thus the overall reactivity. In n-propanol/air flames there are notably higher concentrations of formaldehyde that reacts readily to form formyl radicals whose subsequent reactions enhance the overall reactivity. The kinetic model used in this study was found to overpredict the experimental results for rich n-propanol/air and propane/air flames. Analysis revealed that those discrepancies are most likely caused by deficiencies in the C{sub 3} alkane kinetics. Through sensitivity analysis, it was determined also that the propagation and extinction of n-propanol/air and iso-propanol/air flames are sensitive largely to hydrogen, carbon monoxide, and C{sub 1}–C{sub 3} kinetics and not to fuel-specific reactions. Finally, the relative sooting propensities of flames of these three fuels were assessed computationally.

  9. Effect of catalyst structure on oxidative dehydrogenation of ethane and propane on alumina-supported vanadia

    SciTech Connect (OSTI)

    Argyle, Morris D.; Chen, Kaidong; Bell, Alexis T.; Iglesia, Enrique

    2001-09-11T23:59:59.000Z

    The catalytic properties of Al2O3-supported vanadia with a wide range of VOx surface density (1.4-34.2 V/nm2) and structure were examined for the oxidative dehydrogenation of ethane and propane. UV-visible and Raman spectra showed that vanadia is dispersed predominantly as isolated monovanadate species below {approx}2.3 V/nm2. As surface densities increase, two-dimensional polyvanadates appear (2.3-7.0 V/nm2) along with increasing amounts of V2O5 crystallites at surface densities above 7.0 V/nm2. The rate constant for oxidative dehydrogenation (k1) and its ratio with alkane and alkene combustion (k2/k1 and k3/k1, respectively) were compared for both alkane reactants as a function of vanadia surface density. Propene formation rates (per V-atom) are {approx}8 times higher than ethene formation rates at a given reaction temperature, but the apparent ODH activation energies (E1) are similar for the two reactants and relatively insensitive to vanadia surface density. Ethene and propene formation rates (per V-atom) are strongly influenced by vanadia surface density and reach a maximum value at intermediate surface densities ({approx}8 V/nm2). The ratio of k2/k1 depends weakly on reaction temperature, indicating that activation energies for alkane combustion and ODH reactions are similar. The ratio of k2/k1 is independent of surface density for ethane, but increase slightly with vanadia surface density for propane, suggesting that isolated structures prevalent at low surface densities are slightly more selective for alkane dehydrogenation reactions. The ratio of k3/k1 decreases markedly with increasing reaction temperature for both ethane and propane ODH. Thus, the apparent activation energy for alkene combustion (E3) is much lower than that for alkane dehydrogenation (E1) and the difference between these two activation energies decreases with increasing surface density. The lower alkene selectivities observed at high vanadia surface densities are attributed to an increase in alkene adsorption enthalpies with increasing vanadia surface density. The highest yield of alkene is obtained for catalysts containing predominantly isolated monovanadate species and operated at high temperatures that avoid homogeneous reactions (< {approx} 800 K).

  10. Cross sections for electron scattering by propane in the low- and intermediate-energy ranges

    SciTech Connect (OSTI)

    Souza, G. L. C. de; Lee, M.-T.; Sanches, I. P.; Rawat, P.; Iga, I.; Santos, A. S. dos; Machado, L. E.; Sugohara, R. T.; Brescansin, L. M.; Homem, M. G. P.; Lucchese, R. R. [Departamento de Quimica, UFSCar, 13565-905 Sao Carlos, SP (Brazil); Departamento de Fisica, UFSCar, 13565-905 Sao Carlos, SP (Brazil); Instituto de Fisica 'Gleb Wataghin', UNICAMP, 13083-970 Campinas, SP (Brazil); Departamento de Fisica, UFSC, 88010-970 Florianopolis, SC (Brazil); Department of Chemistry, Texas A and M University, College Station, Texas 7784-3255 (United States)

    2010-07-15T23:59:59.000Z

    We present a joint theoretical-experimental study on electron scattering by propane (C{sub 3}H{sub 8}) in the low- and intermediate-energy ranges. Calculated elastic differential, integral, and momentum transfer as well as total (elastic + inelastic) and total absorption cross sections are reported for impact energies ranging from 2 to 500 eV. Also, experimental absolute elastic cross sections are reported in the 40- to 500-eV energy range. A complex optical potential is used to represent the electron-molecule interaction dynamics. A theoretical method based on the single-center-expansion close-coupling framework and corrected by the Pade approximant is used to solve the scattering equations. The experimental angular distributions of the scattered electrons are converted to absolute cross sections using the relative flow technique. The comparison of our calculated with our measured results, as well as with other experimental and theoretical data available in the literature, is encouraging.

  11. Gas/solvent-induced transformation and expansion of a nonporous solid to 1:1 host guest form

    SciTech Connect (OSTI)

    Thallapally, Praveen K.; McGrail, B. Peter; Dalgarno, Scott J.; Atwood, Jerry L.

    2008-07-01T23:59:59.000Z

    Herein we report the gas (CO2, N2O and propane) and solvent (CS2 and acetone) induced transformation and expansion of guest free thermodynamic form of a p-tert-butylcalix [4]arene to 1:1 host guest form.

  12. Natural gas transport by plastic pipes. (Latest citations from the Compendex database). Published Search

    SciTech Connect (OSTI)

    Not Available

    1993-07-01T23:59:59.000Z

    The bibliography contains citations concerning the use of plastic piping to transport natural gas or liquid propane gas. The interaction between gas odorants and plastic pipe, the effects of aging on plastic pipe used to transport gas, and pipe failure analyses are examined. Bending, joining, and repair methods are discussed. Composite reinforced plastic pipes and plastic coated pipes are considered. Polyethylene and epoxy composites are among the materials discussed. Gas main upgrading projects that replaced old pipes with plastic ones are briefly cited. (Contains a minimum of 88 citations and includes a subject term index and title list.)

  13. CORPORATE OVERVIEW AMEREN CORPORATION

    E-Print Network [OSTI]

    Subramanian, Venkat

    regional), distribution · Natural gas: sales, transmission & distribution · Sources: Hydro, Ultra-low-sulfur

  14. Experimental study of enhancement of injectivity and in-situ oil upgrading by steam-propane injection for the Hamaca heavy oil field 

    E-Print Network [OSTI]

    Rivero Diaz, Jose Antonio

    2002-01-01T23:59:59.000Z

    Experiments were conducted to study the feasibility of using propane as a steam additive to accelerate oil production and improve steam injectivity in the Hamaca field, Venezuela. The experiments utilized a vertical injection cell into which a...

  15. Use of a thermodynamic cycle simulation to determine the difference between a propane-fuelled engine and an iso-octane-fuelled engine 

    E-Print Network [OSTI]

    Pathak, Dushyant

    2006-04-12T23:59:59.000Z

    the engine cycle simulation to determine the difference between a propane-fuelled and an iso-octane-fuelled engine for the same operating conditions and engine specifications. A comprehensive parametric investigation was conducted to examine the effects...

  16. Experimental study of enhancement of injectivity and in-situ oil upgrading by steam-propane injection for the Hamaca heavy oil field

    E-Print Network [OSTI]

    Rivero Diaz, Jose Antonio

    2002-01-01T23:59:59.000Z

    Experiments were conducted to study the feasibility of using propane as a steam additive to accelerate oil production and improve steam injectivity in the Hamaca field, Venezuela. The experiments utilized a vertical injection cell into which a...

  17. Use of a thermodynamic cycle simulation to determine the difference between a propane-fuelled engine and an iso-octane-fuelled engine

    E-Print Network [OSTI]

    Pathak, Dushyant

    2006-04-12T23:59:59.000Z

    the engine cycle simulation to determine the difference between a propane-fuelled and an iso-octane-fuelled engine for the same operating conditions and engine specifications. A comprehensive parametric investigation was conducted to examine the effects...

  18. Propane tank explosion (2 deaths, 7 injuries) at Herrig Brothers Feather Creek Farm, Albert City, Iowa, April 9, 1998. Investigation report

    SciTech Connect (OSTI)

    NONE

    1999-09-01T23:59:59.000Z

    This report explains the explosion/BLEVE that took place on April 9, 1998, at the Herrig Brothers Feather Creek Farm, located in Albert City, Iowa. Two volunteer fire fighters were killed and seven other emergency response personnel were injured. Safety issues covered in the report include protection of propane storage tanks and piping, state regulatory oversight of such installations, and fire fighter response to propane storage tank fires.

  19. Adsorption of propane, isopropyl, and hydrogen on cluster models of the M1 phase of Mo-V-Te-Nb-O mixed metal oxide catalyst

    SciTech Connect (OSTI)

    Govindasamy, Agalya [University of Cincinnati; Muthukumar, Kaliappan [University of Cincinnati; Yu, Junjun [University of Cincinnati; Xu, Ye [ORNL; Guliants, Vadim V. [University of Cincinnati

    2010-01-01T23:59:59.000Z

    The Mo-V-Te-Nb-O mixed metal oxide catalyst possessing the M1 phase structure is uniquely capable of directly converting propane into acrylonitrile. However, the mechanism of this complex eight-electron transformation, which includes a series of oxidative H-abstraction and N-insertion steps, remains poorly understood. We have conducted a density functional theory study of cluster models of the proposed active and selective site for propane ammoxidation, including the adsorption of propane, isopropyl (CH{sub 3}CHCH{sub 3}), and H which are involved in the first step of this transformation, that is, the methylene C-H bond scission in propane, on these active site models. Among the surface oxygen species, the telluryl oxo (Te=O) is found to be the most nucleophilic. Whereas the adsorption of propane is weak regardless of the MO{sub x} species involved, isopropyl and H adsorption exhibits strong preference in the order of Te=O > V=O > bridging oxygens > empty Mo apical site, suggesting the importance of TeO{sub x} species for H abstraction. The adsorption energies of isopropyl and H and consequently the reaction energy of the initial dehydrogenation of propane are strongly dependent on the number of ab planes included in the cluster, which points to the need to employ multilayer cluster models to correctly capture the energetics of surface chemistry on this mixed metal oxide catalyst.

  20. Michigan residential No. 2 fuel oil and propane price survey for the 1990/91 heating season. Final report

    SciTech Connect (OSTI)

    Not Available

    1991-10-01T23:59:59.000Z

    This report summarizes the results of a survey of home heating oil and propane prices over the 1990/1991 heating season in Michigan. The survey was conducted under a cooperative agreement between the State of Michigan, Michigan Public Service Commission and the US Department of Energy (DOE), Energy Information Administration (EIA), and was funded by a grant from EIA. From October 1990 through May 1991, participating dealers/distributions were called and asked for their current residential retail prices of No. 2 home heating oil and propane. This information was then transmitted to the EIA, bi-monthly using an electronic reporting system called Petroleum Data Reporting Option (PEDRO). The survey was conducted using a sample provided by EIA of home heating oil and propane retailers which supply Michigan households. These retailers were contacted the first and third Mondays of each month. The sample was designed to account for distributors with different sales volumes, geographic distributions and sources of primary supply. It should be noted that this simple is different from the sample used in prior year surveys.

  1. Michigan residential No. 2 fuel oil and propane price survey for the 1990/91 heating season

    SciTech Connect (OSTI)

    Not Available

    1991-10-01T23:59:59.000Z

    This report summarizes the results of a survey of home heating oil and propane prices over the 1990/1991 heating season in Michigan. The survey was conducted under a cooperative agreement between the State of Michigan, Michigan Public Service Commission and the US Department of Energy (DOE), Energy Information Administration (EIA), and was funded by a grant from EIA. From October 1990 through May 1991, participating dealers/distributions were called and asked for their current residential retail prices of No. 2 home heating oil and propane. This information was then transmitted to the EIA, bi-monthly using an electronic reporting system called Petroleum Data Reporting Option (PEDRO). The survey was conducted using a sample provided by EIA of home heating oil and propane retailers which supply Michigan households. These retailers were contacted the first and third Mondays of each month. The sample was designed to account for distributors with different sales volumes, geographic distributions and sources of primary supply. It should be noted that this simple is different from the sample used in prior year surveys.

  2. Super critical fluid extraction of a crude oil bitumen-derived liquid and bitumen by carbon dioxide and propane

    SciTech Connect (OSTI)

    Deo, M.D.; Hwang, J.; Hanson, F.V.

    1991-01-01T23:59:59.000Z

    Supercritical fluid extraction of complex hydrocarbon mixtures is important in separation processes, petroleum upgrading and enhanced oil recovery. In this study, a paraffinic crude oil, a bitumen- derived liquid and bitumen were extracted at several temperatures and pressures with carbon dioxide and propane to assess the effect of the size and type of compounds that makeup the feedstock on the extraction process. It was observed that the pure solvent density at the extraction conditions was not the sole variable governing extraction, and that the proximity of the extraction conditions to the pure solvent critical point affected the extraction yields and the compositions of the extracts. Heavier compounds reported to the extract phase as the extraction time increased at constant temperature and pressure and as the extraction pressure increased at constant temperature and extraction time for both the paraffin crude-propane and the bitumen-propane systems. This preferential extraction was not observed for the bitumen-derived liquid. The non-discriminatory extraction behavior of the bitumen-derived liquid was attributed to its thermal history and to the presence of the olefins and aromatics in the liquid. Phase behavior calculations using the Peng-Robinson equation of state and component lumping procedures provided reasonable agreement between calculated and experimental results for the crude oil and bitumen extractions, but failed in the prediction of the phase compositions for the bitumen-derived liquid extractions.

  3. Super critical fluid extraction of a crude oil bitumen-derived liquid and bitumen by carbon dioxide and propane

    SciTech Connect (OSTI)

    Deo, M.D.; Hwang, J.; Hanson, F.V.

    1991-12-31T23:59:59.000Z

    Supercritical fluid extraction of complex hydrocarbon mixtures is important in separation processes, petroleum upgrading and enhanced oil recovery. In this study, a paraffinic crude oil, a bitumen- derived liquid and bitumen were extracted at several temperatures and pressures with carbon dioxide and propane to assess the effect of the size and type of compounds that makeup the feedstock on the extraction process. It was observed that the pure solvent density at the extraction conditions was not the sole variable governing extraction, and that the proximity of the extraction conditions to the pure solvent critical point affected the extraction yields and the compositions of the extracts. Heavier compounds reported to the extract phase as the extraction time increased at constant temperature and pressure and as the extraction pressure increased at constant temperature and extraction time for both the paraffin crude-propane and the bitumen-propane systems. This preferential extraction was not observed for the bitumen-derived liquid. The non-discriminatory extraction behavior of the bitumen-derived liquid was attributed to its thermal history and to the presence of the olefins and aromatics in the liquid. Phase behavior calculations using the Peng-Robinson equation of state and component lumping procedures provided reasonable agreement between calculated and experimental results for the crude oil and bitumen extractions, but failed in the prediction of the phase compositions for the bitumen-derived liquid extractions.

  4. Modeling of the formation of short-chain acids in propane flames

    E-Print Network [OSTI]

    Battin-Leclerc, Frédérique; Jaffrezo, J L; Legrand, M

    2009-01-01T23:59:59.000Z

    In order to better understand their potential formation in combustion systems, a detailed kinetic mechanism for the formation of short-chain monocarboxylic acids, formic (HCOOH), acetic (CH3COOH), propionic (C2H5COOH) and propenic (C2H3COOH)) acids, has been developed. Simulations of lean (equivalence ratios from 0.9 to 0.48) laminar premixed flames of propane stabilized at atmospheric pressure with nitrogen as diluent have been performed. It was found that amounts up to 25 ppm of acetic acid, 15 ppm of formic acid and 1 ppm of C3 acid can be formed for some positions in the flames. Simulations showed that the more abundant C3 acid formed is propenic acid. A quite acceptable agreement has been obtained with the scarce results from the literature concerning oxygenated compounds, including aldehydes (CH2O, CH3CHO) and acids. A reaction pathways analysis demonstrated that each acid is mainly derived from the aldehyde of similar structure.

  5. Subnanometer platinum clusters highly active and selective catalysts for the oxidative dehydrogenation of propane.

    SciTech Connect (OSTI)

    Vajda, S; Pellin, M. J.; Greeley, J. P.; Marshall, C. L.; Curtiss, L. A.; Ballentine, G. A.; Elam, J. W.; Catillon-Mucherie, S.; Redfern, P. C.; Mehmood, F.; Zapol, P.; Yale Univ.

    2009-03-01T23:59:59.000Z

    Small clusters are known to possess reactivity not observed in their bulk analogues, which can make them attractive for catalysis. Their distinct catalytic properties are often hypothesized to result from the large fraction of under-coordinated surface atoms. Here, we show that size-preselected Pt{sub 8-10} clusters stabilized on high-surface-area supports are 40-100 times more active for the oxidative dehydrogenation of propane than previously studied platinum and vanadia catalysts, while at the same time maintaining high selectivity towards formation of propylene over by-products. Quantum chemical calculations indicate that under-coordination of the Pt atoms in the clusters is responsible for the surprisingly high reactivity compared with extended surfaces. We anticipate that these results will form the basis for development of a new class of catalysts by providing a route to bond-specific chemistry, ranging from energy-efficient and environmentally friendly synthesis strategies to the replacement of petrochemical feedstocks by abundant small alkanes.

  6. Autoignited laminar lifted flames of propane in coflow jets with tribrachial edge and mild combustion

    SciTech Connect (OSTI)

    Choi, B.C.; Kim, K.N.; Chung, S.H. [School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744 (Korea)

    2009-02-15T23:59:59.000Z

    Characteristics of laminar lifted flames have been investigated experimentally by varying the initial temperature of coflow air over 800 K in the non-premixed jets of propane diluted with nitrogen. The result showed that the lifted flame with the initial temperature below 860 K maintained the typical tribrachial structure at the leading edge, which was stabilized by the balance mechanism between the propagation speed of tribrachial flame and the local flow velocity. For the temperature above 860 K, the flame was autoignited without having any external ignition source. The autoignited lifted flames were categorized in two regimes. In the case with tribrachial edge structure, the liftoff height increased nonlinearly with jet velocity. Especially, for the critical condition near blowout, the lifted flame showed a repetitive behavior of extinction and reignition. In such a case, the autoignition was controlled by the non-adiabatic ignition delay time considering heat loss such that the autoignition height was correlated with the square of the adiabatic ignition delay time. In the case with mild combustion regime at excessively diluted conditions, the liftoff height increased linearly with jet velocity and was correlated well with the square of the adiabatic ignition delay time. (author)

  7. Soot formation and temperature field structure in laminar propane-air diffusion flames at elevated pressures

    SciTech Connect (OSTI)

    Bento, Decio S.; Guelder, OEmer L. [Institute for Aerospace Studies, University of Toronto, 4925 Dufferin Street, Toronto, ON M3H 5T6 (Canada); Thomson, Kevin A. [National Research Council, ICPET Combustion Technology, 1200 Montreal Road M-9, Ontario K1A 0R6 (Canada)

    2006-06-15T23:59:59.000Z

    The effect of pressure on soot formation and the structure of the temperature field was studied in coflow propane-air laminar diffusion flames over the pressure range of 0.1 to 0.73 MPa in a high-pressure combustion chamber. The fuel flow rate was selected so that the soot was completely oxidized within the visible flame and the flame was stable at all pressures. Spectral soot emission was used to measure radially resolved soot volume fraction and soot temperature as a function of pressure. Additional soot volume fraction measurements were made at selected heights using line-of-sight light attenuation. Soot concentration values from these two techniques agreed to within 30% and both methods exhibited similar trends in the spatial distribution of soot concentration. Maximum line-of-sight soot concentration along the flame centerline scaled with pressure; the pressure exponent was about 1.4 for pressures between 0.2 and 0.73 MPa. Peak carbon conversion to soot, defined as the percentage of fuel carbon content converted to soot, also followed a power-law dependence on pressure, where the pressure exponent was near to unity for pressures between 0.2 and 0.73 MPa. Soot temperature measurements indicated that the overall temperatures decreased with increasing pressure; however, the temperature gradients increased with increasing pressure. (author)

  8. Operation of a Four-Cylinder 1.9L Propane Fueled HCCI Engine

    SciTech Connect (OSTI)

    Flowers, D; Aceves, S M; Martinez-Frias, J; Smith, J R; Au, M; Girard, J; Dibble, R

    2001-03-15T23:59:59.000Z

    A four-cylinder 1.9 Volkswagen TDI Engine has been converted to run in Homogeneous Charge Compression Ignition (HCCI) mode. The stock configuration is a turbocharged direct injection Diesel engine. The combustion chamber has been modified by discarding the in-cylinder Diesel fuel injectors and replacing them with blank inserts (which contain pressure transducers). The stock pistons contain a reentrant bowl and have been retained for the tests reported here. The intake and exhaust manifolds have also been retained, but the turbocharger has been removed. A heater has been installed upstream of the intake manifold and fuel is added just downstream of this heater. The performance of this engine in naturally aspirated HCCI operation, subject to variable intake temperature and fuel flow rate, has been studied. The engine has been run with propane fuel at a constant speed of 1800 rpm. This work is intended to characterize the HCCI operation of the engine in this configuration that has been minimally modified from the base Diesel engine. The performance (BMEP, IMEP, efficiency, etc) and emissions (THC, CO, NOx) of the engine are presented, as are combustion process results based on heat release analysis of the pressure traces from each cylinder.

  9. Analysis of natural gas supply strategies at Fort Drum

    SciTech Connect (OSTI)

    Stucky, D.J.; Shankle, S.A.; Anderson, D.M.

    1992-07-01T23:59:59.000Z

    This analysis investigates strategies for Fort Drum to acquire a reliable natural gas supply while reducing its gas supply costs. The purpose of this study is to recommend an optimal supply mix based on the life-cycle costs of each strategy analyzed. In particular, this study is intended to provide initial guidance as to whether or not the building and operating of a propane-air mixing station is a feasible alternative to the current gas acquisition strategy. The analysis proceeded by defining the components of supply (gas purchase, gas transport, supplemental fuel supply); identifying alternative options for each supply component; constructing gas supply strategies from different combinations of the options available for each supply component and calculating the life-cycle costs of each supply strategy under a set of different scenarios reflecting the uncertainty of future events.

  10. Solid-State Gas Sensors:A Review A. M. Azad, S. A. Akbar,* S. G. Mhaisalkar,~ L. D. Birkefeld,** and K. S. Gotob

    E-Print Network [OSTI]

    Azad, Abdul-Majeed

    to briefly outline some of the environmental concerns. LP gas can form explosive mixture with ambient air and development. The application of these sensors range from air-to-fuel ratio control in combustion processes include: 02, H2, CO, CO2, NOx, SO=, propane, methane, ethanol, and so on. The semiconductor-based chemical

  11. Natural gas transport by plastic pipes. (Latest citations from the EI Compendex*plus database). Published Search

    SciTech Connect (OSTI)

    Not Available

    1994-05-01T23:59:59.000Z

    The bibliography contains citations concerning the use of plastic piping to transport natural gas or liquid propane gas. The interaction between gas odorants and plastic pipe, the effects of aging on plastic pipe used to transport gas, and pipe failure analyses are examined. Bending, joining, and repair methods are discussed. Composite reinforced plastic pipes and plastic coated pipes are considered. Polyethylene and epoxy composites are among the materials discussed. Gas main upgrading projects that replaced old pipes with plastic ones are briefly cited. (Contains a minimum of 89 citations and includes a subject term index and title list.)

  12. Oxidative Dehydrogenation of Propane over V2O5/MoO3/Al2O3 and V2O5/Cr2O3/Al2O3: Structural Characterization and Catalytic Function

    E-Print Network [OSTI]

    Bell, Alexis T.

    Oxidative Dehydrogenation of Propane over V2O5/MoO3/Al2O3 and V2O5/Cr2O3/Al2O3: Structural of stoichiometric reduction in H2, and the oxidative dehydrogenation of propane. VOx domains on Al2O3 modified The oxidative dehydrogenation (ODH) of propane provides an attractive route for the synthesis of propene.1

  13. Evolution of gas processing industry in Saudi Arabia

    SciTech Connect (OSTI)

    Showail, A.

    1983-01-01T23:59:59.000Z

    The beginning of the natural gas processing industry in Saudi Arabia is traced back to 1959 when Aramco embarked on a program to recover natural gas liquids (NGL) for export from low pressure gases such as stabilizer overhead, spheroid, tank farm, and refinery off-gases. The processing scheme involves compression and refrigeration to extract C3+ raw NGL, a raw NGL gathering system, and a fractionation plant to separate propane, butane, and natural gasoline. NGL extracted in Abqaiq and Ras Tanura is moved to Ras Tanura for fractionation, storage, and export. The system, built in several increments, has total design capacity of 500 MMscfd of feed gases to produce 320,000 bpd of NGL composed of 40% propane, 30% butane, and 30% natural gasoline. Phase II of the Saudi gas program envisages collection and processing of associated gas produced with Arabian medium and heavy crude oils largely in the northern onshore and offshore fields. Further domestic development may focus on more diversification in gas product utilization and on upgrading to higher value products.

  14. ED-XAS Data Reveal In-situ Time-Resolved Adsorbate Coverage on Supported Molybdenum Oxide Catalysts during Propane Dehydrogenation

    SciTech Connect (OSTI)

    Ramaker, David; Gatewood, Daniel [Department of Chemistry, George Washington University, Washington D.C. 20052 (United States); Beale, Andrew M.; Weckhuysen, Bert M. [Inorganic Chemistry and Catalysis, Dept. of Chem., Utrecht University, Sorbonnelaan 16, 3584 CA Utrecht (Netherlands)

    2007-02-02T23:59:59.000Z

    Energy-Dispersive X-ray Absorption Spectroscopy (ED-XAS) data combined with UV/Vis, Raman, and mass spectrometry data on alumina- and silica-supported molybdenum oxide catalysts under propane dehydrogenation conditions have been previously reported. A novel {delta}{mu} adsorbate isolation technique was applied here to the time-resolved (0.1 min) Mo K-edge ED-XAS data by taking the difference of absorption, {mu}, at t>1 against the initial time, t=0. Further, full multiple scattering calculations using the FEFF 8.0 code are performed to interpret the {delta}{mu} signatures. The resulting difference spectra and interpretation provide real time propane coverage and O depletion at the MoOn surface. The propane coverage is seen to correlate with the propene and/or coke production, with the maximum coke formation occurring when the propane coverage is the largest. Combined, these data give unprecedented insight into the complicated dynamics for propane dehydrogenation.

  15. Giant strain with ultra-low hysteresis and high temperature stability in grain oriented lead-free K0.5Bi0.5TiO3-BaTiO3-Na0.5Bi0.5TiO3 piezoelectric materials

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Maurya, Deepam; Zhou, Yuan; Wang, Yaojin; Yan, Yongke; Li, Jiefang; Viehland, Dwight; Priya, Shashank

    2015-02-26T23:59:59.000Z

    We synthesized grain-oriented lead-free piezoelectric materials in (K0.5Bi0.5TiO3-BaTiO3-Na0.5Bi0.5TiO3 (KBT-BT-NBT) system with high degree of texturing along the [001]c (c-cubic) crystallographic orientation. We demonstrate giant field induced strain (,0.48%) with an ultra-low hysteresis along with enhanced piezoelectric response (d33 , 190pC/N) and high temperature stability (,1606C). Transmission electron microscopy (TEM) and piezoresponse force microscopy (PFM) results demonstrate smaller size highly ordered domain structure in grain-oriented specimen relative to the conventional polycrystalline ceramics. The grain oriented specimens exhibited a high degree of non-1806 domain switching, in comparison to the randomly axed ones. These results indicate the effective solution to the lead-free piezoelectricmore »materials.« less

  16. State heating oil & propane program. Final report for the Commonwealth of Pennsylvania 1994--1995 heating season

    SciTech Connect (OSTI)

    NONE

    1995-05-18T23:59:59.000Z

    This report has been prepared by the Pennsylvania Energy Office (PEO) to summarize its activities under the State Heating Oil and Propane Program (SHOPP) for the 1994-95 heating season. The PEO is under a cooperative agreement, Agreement DE-7C01-91E122784, Amendment No. 3, with the U.S. Department of Energy, Energy Information Administration (DOE/EIA) to conduct these activities. The objective of the SHOPP program was to collect Pennsylvania-specific price information for residential No. 2 heating oil and propane and transmit this information to DOE/EIA for compilation into its various reports and publications. Under the PEO`s cooperative agreement with DOE/EIA, prices were collected on the first and third Mondays of each month, starting on October 3, 1994, and extending through March 20, 1995. Prices were obtained via telephone calls made by PEO staff. For each heating oil distributor in the survey sample, the PEO collected charge prices for a standard delivery quantity of No. 2 heating oil. For propane, dealers were requested to provide the price for a customer using between one thousand and fifteen hundred gallons of fuel during the heating season. The PEO agreed to forward the survey results to the DOE/EIA within three days of the date of each survey. DOE/EIA`s responsibility was to compile the data from all states and distribute a bi-weekly report. In addition, DOE/EIA took responsibility for the collection of primary stock information for No. 2 heating oil.

  17. The catalytic oxidation of propane and propylene with air: total aldehyde production and selectivity at low conversions.

    E-Print Network [OSTI]

    Looney, Franklin Sittig

    1950-01-01T23:59:59.000Z

    ~ Ths writer is izntebteg to pr, P G~ ~och Tor his assistance azsi guidance in this work aC to Br~ J+ 9 Kinds Tor his aery. suggestions eel Succor~ a The oxidation cf propane~ propylene and prcya~cregyimm mbetccres ctver a ~ aiucdna ~st in a flew... vere developed for rms with Iow propylene pressers Froa ths recncits of this study it, appears that the reaction yieldiccg aldehyde occurs in the fere part af the reactec bed Increased oxidation br' about by tunreased residence tins causes eccidation...

  18. High-Pressure Micellar Solutions of Polystyrene-block-Polybutadiene and Polystyrene-block-Polyisoprene Solutions in Propane Exhibit Cloud-Pressure Reduction and Distinct Micellization End Points

    SciTech Connect (OSTI)

    Winoto, Winoto [University of Wyoming, Laramie; Radosz, Maciej [University of Wyoming, Laramie; Tan, Sugata [University of Wyoming, Laramie; Hong, Kunlun [ORNL; Mays, Jimmy [ORNL

    2009-01-01T23:59:59.000Z

    Micellar solutions of polystyrene-block-polybutadiene and polystyrene-block-polyisoprene in propane are found to exhibit significantly lower cloud pressures than the corresponding hypothetical non-micellar solutions. Such a cloud-pressure reduction indicates the extent to which micelle formation enhances the apparent diblock solubility in near-critical and hence compressible propane. Pressure-temperature points beyond which no micelles can be formed, referred to as the micellization end points, are found to depend on the block type, size and ratio, and on the polymer concentration. For a given pressure, the micellization end-point temperature corresponds to the "critical micelle temperature." The cloud-pressure reduction and the micellization end point measured for styrene-diene diblocks in propane should be characteristic of all amphiphilic diblock copolymer solutions that form micelles in compressible solvents.

  19. A Sequential Fluid-mechanic Chemical-kinetic Model of Propane HCCI Combustion

    SciTech Connect (OSTI)

    Aceves, S M; Flowers, D L; Martinez-Frias, J; Smith, J R; Westbrook, C; Pitz, W; Dibble, R; Wright, J F; Akinyemi, W C; Hessel, R P

    2000-11-29T23:59:59.000Z

    We have developed a methodology for predicting combustion and emissions in a Homogeneous Charge Compression Ignition (HCCI) Engine. This methodology combines a detailed fluid mechanics code with a detailed chemical kinetics code. Instead of directly linking the two codes, which would require an extremely long computational time, the methodology consists of first running the fluid mechanics code to obtain temperature profiles as a function of time. These temperature profiles are then used as input to a multi-zone chemical kinetics code. The advantage of this procedure is that a small number of zones (10) is enough to obtain accurate results. This procedure achieves the benefits of linking the fluid mechanics and the chemical kinetics codes with a great reduction in the computational effort, to a level that can be handled with current computers. The success of this procedure is in large part a consequence of the fact that for much of the compression stroke the chemistry is inactive and thus has little influence on fluid mechanics and heat transfer. Then, when chemistry is active, combustion is rather sudden, leaving little time for interaction between chemistry and fluid mixing and heat transfer. This sequential methodology has been capable of explaining the main characteristics of HCCI combustion that have been observed in experiments. In this paper, we use our model to explore an HCCI engine running on propane. The paper compares experimental and numerical pressure traces, heat release rates, and hydrocarbon and carbon monoxide emissions. The results show an excellent agreement, even in parameters that are difficult to predict, such as chemical heat release rates. Carbon monoxide emissions are reasonably well predicted, even though it is intrinsically difficult to make good predictions of CO emissions in HCCI engines. The paper includes a sensitivity study on the effect of the heat transfer correlation on the results of the analysis. Importantly, the paper also shows a numerical study on how parameters such as swirl rate, crevices and ceramic walls could help in reducing HC and CO emissions from HCCI engines.

  20. Understanding the dynamics of a two-phase flow (liquid and gas) has been studied quite extensively over the past. This problem is indeed of direct relevance for many areas such

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    be trapped on the ground because of the presence of an obstacle. The studied products were propane, butane set-up, and pressure storage. 1 INTRODUCTION In many chemical and process plants, gas are stored for the understanding of the flow inside the pipe. The net of pipes linking the storage and the nozzle are composed

  1. United States Department of Energy New Jersey Department of Environmental Protection and Energy. 1991--1992 Heating Oil and Propane Price Monitoring Program

    SciTech Connect (OSTI)

    NONE

    1998-12-31T23:59:59.000Z

    In cooperation with the United States Department of Energy (USDOE), Energy Information Administration (EIA) the New Jersey Department of Environmental Protection and Energy (DEPE), Office of Energy participated in a program to monitor retail prices of no. 2 heating oil and propane in New Jersey. According to program instructions, we conducted price surveys on a semi-monthly basis to obtain the necessary information from retail fuel merchants and propane dealers identified by the EIA. The period of the surveys was October 7, 1991 to March 16 1992. We submitted data collected as of specified reference dates to the EIA, within two working days of those dates.

  2. Synergistic effect of mixing dimethyl ether with methane, ethane, propane, and ethylene fuels on polycyclic aromatic hydrocarbon and soot formation

    SciTech Connect (OSTI)

    Yoon, S.S. [Corporate Research and Development Division, Hyundai-Kia Motors, Gyeonggi-do 445-706 (Korea); Anh, D.H. [Korea Electric Power Research Institute, Daejeon 305-380 (Korea); Chung, S.H. [School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742 (Korea)

    2008-08-15T23:59:59.000Z

    Characteristics of polycyclic aromatic hydrocarbon (PAH) and soot formation in counterflow diffusion flames of methane, ethane, propane, and ethylene fuels mixed with dimethyl ether (DME) have been investigated. Planar laser-induced incandescence and fluorescence techniques were employed to measure relative soot volume fractions and PAH concentrations, respectively. Results showed that even though DME is known to be a clean fuel in terms of soot formation, DME mixture with ethylene fuel increases PAH and soot formation significantly as compared to the pure ethylene case, while the mixture of DME with methane, ethane, and propane decreases PAH and soot formation. Numerical calculations adopting a detailed kinetics showed that DME can be decomposed to produce a relatively large number of methyl radicals in the low-temperature region where PAH forms and grows; thus the mixture of DME with ethylene increases CH{sub 3} radicals significantly in the PAH formation region. Considering that the increase in the concentration of O radicals is minimal in the PAH formation region with DME mixture, the enhancement of PAH and soot formation in the mixture flames of DME and ethylene can be explained based on the role of methyl radicals in PAH and soot formation. Methyl radicals can increase the concentration of propargyls, which could enhance incipient benzene ring formation through the propargyl recombination reaction and subsequent PAH growth. Thus, the result substantiates the importance of methyl radicals in PAH and soot formation, especially in the PAH formation region of diffusion flames. (author)

  3. 34730,"AGWAY PETRO CORP",1,231,"PROPANE/NGL",0712,"CHAMPL-RS...

    U.S. Energy Information Administration (EIA) Indexed Site

    PT, NY","NEW YORK",1,260,"CANADA",3,0,0,,,,, 34730,"AMERADA HESS CORP",1,152,"MOTOR GAS, OTHER FINISHED",1703,"SAVANNAH,GA","GEORGIA",1,078,"VIRGIN ISLANDS,...

  4. 35095,"AGWAY PETRO CORP",1,231,"PROPANE/NGL",0712,"CHAMPL-RS...

    U.S. Energy Information Administration (EIA) Indexed Site

    TX","TEXAS",3,595,"MEXICO",44,0,0,,,,, 35095,"AMERADA HESS CORP",1,152,"MOTOR GAS, OTHER FINISHED",1703,"SAVANNAH,GA","GEORGIA",1,078,"VIRGIN ISLANDS,...

  5. Experimental studies of steam and steam-propane injection using a novel smart horizontal producer to enhance oil production in the San Ardo field 

    E-Print Network [OSTI]

    Rivero Diaz, Jose Antonio

    2007-09-17T23:59:59.000Z

    is the use of propane as a steam additive with the purpose of increasing recovery and accelerating oil production. The second process involves the use of a novel production configuration that makes use of a vertical injector and a smart horizontal producer...

  6. Experimental study of oil yields and properties of light and medium Venezuelan crude oils under steam and steam-propane distillation 

    E-Print Network [OSTI]

    Plazas Garcia, Joyce Vivia

    2002-01-01T23:59:59.000Z

    Six experimental runs were carried out to study the yields for a light crude oil (34.2°API) and an intermediate crude oil (25.1°API) under steam distillation and steam-propane distillation. Yields, were measured at five temperatures, 110, 150, 200...

  7. Experimental and kinetic study of autoignition in methane/ethane/air and methane/propane/air mixtures under engine-relevant conditions

    SciTech Connect (OSTI)

    Huang, J.; Bushe, W.K. [Department of Mechanical Engineering, University of British Columbia, 6950 Applied Science Lane, Vancouver, British Columbia (Canada V6T 1Z4)

    2006-01-01T23:59:59.000Z

    The ignition delay of homogeneous methane/air mixtures enriched with small fractions of ethane/propane was measured using the reflected-shock technique at temperatures from 900 to 1400 K and pressures from 16 to 40 bar. The results show complex effects of ethane/propane on the ignition of methane, but a common trend observed with both hydrocarbons is an increased promotion effect for temperatures below 1100 K. A detailed kinetic mechanism was used to investigate the interaction between ethane/propane and the ignition chemistry of methane under the above conditions. It was found that at relatively low temperatures, the reactions between ethane/propane and methylperoxy (CH{sub 3}O{sub 2}) lead to an enhanced rate of formation of OH radicals in the initiation phase of the ignition. By systematically applying the quasi-steady-state assumptions to the intermediate species involved in the main reaction path identified, we have achieved an analytical description of the ignition process in the transitional temperature regime. The analytical solutions agree reasonably well with the detailed kinetic model and the experimental results for both ignition delay and concentrations of major intermediate species.

  8. An In-Situ XAS Study of the Structural Changes in a CuO-CeO2/Al2O3 Catalyst during Total Oxidation of Propane

    SciTech Connect (OSTI)

    Silversmith, Geert; Poelman, Hilde; Poelman, Dirk; Gryse, Roger de [Ghent University, Department of Solid State Sciences, Krijgslaan 281 S1, B-9000 Gent (Belgium); Olea, Maria; Balcaen, Veerle; Heynderickx, Philippe; Marin, Guy B. [Ghent University, Laboratorium voor Petrochemische Techniek, Krijgslaan 281 S5, B-9000 Gent (Belgium)

    2007-02-02T23:59:59.000Z

    A CuOx-CeOx/Al2O3 catalyst was studied with in-situ transmission Cu K XAS for the total oxidation of propane as model reaction for the catalytic elimination of volatile organic compounds. The local Cu structure was determined for the catalyst as such, after pre-oxidation and after reduction with propane. The catalyst as such has a local CuO structure. No structural effect was observed upon heating in He up to 600 deg. C or after pre-oxidation at 150 deg. C. A full reduction of the Cu2+ towards metallic Cu0 occurred, when propane was fed to the catalyst. The change in local Cu structure during propane reduction was followed with a time resolution of 1 min. The {chi}(k) scans appeared as linear combinations of start and end spectra, CuO and Cu structure, respectively. However, careful examination of the XANES edge spectra indicates the presence of a small amount of additional Cu1+ species.

  9. Experimental study of oil yields and properties of light and medium Venezuelan crude oils under steam and steam-propane distillation

    E-Print Network [OSTI]

    Plazas Garcia, Joyce Vivia

    2002-01-01T23:59:59.000Z

    Six experimental runs were carried out to study the yields for a light crude oil (34.2°API) and an intermediate crude oil (25.1°API) under steam distillation and steam-propane distillation. Yields, were measured at five temperatures, 110, 150, 200...

  10. Influence of low and high temperature coking of H-GaMFI propane aromatization catalyst on its surface and catalytic properties

    SciTech Connect (OSTI)

    Choudhary, V.R.; Kinage, A.K.; Devadas, P. [National Chemical Lab., Pune (India)] [and others] [National Chemical Lab., Pune (India); and others

    1997-03-01T23:59:59.000Z

    H-Gallosilicate (MFI) (i.e., H-GaMFI) zeolite shows high activity/selectivity in the aromatization of lower alkanes, which is processes of treat practical importance. The high aromatization activity of this catalyst is attributed to its high dehydrogenation activity due to the presence of high dispersed nonframework Ga-oxide species (which are formed during hydrothermal synthesis and/or pretreatments to the zeolite) along with the zeolitic acid sites (or framework Ga), resulting in a bifunctional catalyst. However, this zeolite undergoes fast catalyst deactivation in the propane aromatization. The catalyst deactivation is attributed mainly to the coke formation on the zeolite. Earlier, a few studies have been reported on the deactivation of H-GaMFI zeolite in the propane aromatization. The catalyst deactivation is attributed mainly to the coke formation on the zeolite. Earlier, a few studies have been reported on the deactivation of H-GaMFI zeolite in the propane aromatization at 500-550{degrees}C for a short time-on-stream (10 h). It is interesting to know the effect of catalyst deactivation due to coking in the propane aromatization for much longer periods both at low (at 400{degrees}C) and high (at 550{degrees}C) temperatures on the product selectivity and also on the surface (viz., sorption capacity, acidity/acid strength distribution) and catalytic properties of the zeolite. The present investigation was undertaken for this purpose. 16 refs., 1 fig., 3 tabs.

  11. Cracking of simulated oil refinery off-gas over a coal char, petroleum coke, and quartz

    SciTech Connect (OSTI)

    Yuan Zhang; Jin-hu Wu; Dong-ke Zhang [Chinese Academy of Sciences, Taiyuan (China). Institute of Coal Chemistry

    2008-03-15T23:59:59.000Z

    The cracking of oil refinery off-gas, simulated with a gas mixture containing methane (51%), ethylene (21.4%), ethane (21.1%), and propane (6.5%), over a coal char, petroleum coke, and quartz, respectively, has been studied in a fixed bed reactor. The experiments were performed at temperatures between 850 and 1000{sup o}C and at atmospheric pressure. The results show that the conversions of all species considered increased with increasing temperature. Ethane and propane completely decomposed over all three bed materials in the temperature range investigated. However, the higher initial conversion rates of methane and ethylene cracking at all temperatures were observed only over the coal char and not on the petroleum coke and quartz, indicating a significant catalytic effect of the coal char on methane and ethylene cracking. Methane and ethylene conversions decreased with reaction time due to deactivation of the coal char by carbon deposition on the char surface and, in the later stage of a cracking experiment, became negative, suggesting that methane and ethylene had been formed during the cracking of ethane and propane. 16 refs., 13 figs., 2 tabs.

  12. The preliminary result from spectra of $K^0_s ?^-$ in reaction p+propane at 10 GeV/c

    E-Print Network [OSTI]

    P. Zh. Aslanyan

    2006-05-04T23:59:59.000Z

    The experimental data from 2m propane bubble chamber have been analyzed to search for scalar meson $\\kappa(800)$ in a $K^0_s\\pi$ decay mode for the reaction p+$C_3H_8$ at 10 GeV/c. The $K^0_s\\pi^-$ invariant mass spectrum has shown resonant structures with $M_{K^0_s\\pi^-}$=730, 900 and $\\Gamma$=143, 48 MeV/$c^2$, respectively. The statistical significance are estimated to be of 14.2$\\sigma$ and 4.2$\\sigma$, respectively. The peak in M(900) is identified as reflection from the well known resonance with mass of 892 MeV/c$^2$.

  13. Compressible Solution Properties of Amorphous Polystyrene-block-Polybutadiene, Crystalline Polystyrene-block-Poly(Hydrogenated Polybutadiene) and Their Corresponding Homopolymers: Fluid-Fluid, Fluid-Solid and Fluid-Micelle Phase Transitions in Propane and Propylene

    SciTech Connect (OSTI)

    Hong, Kunlun [ORNL; Mays, Jimmy [ORNL; Winoto, Winoto [University of Wyoming, Laramie; Radosz, Maciej [University of Wyoming, Laramie

    2009-01-01T23:59:59.000Z

    Abstract Polystyrene, polybutadiene, hydrogenated polybutadiene, and styrene diblock copolymers of these homopolymers can form homogenous solutions in compressible solvents, such as propane and propylene, which separate into two bulk phases upon reducing pressure. The cloud and micellization pressures for homopolymer and diblock copolymers are generally found to be higher in propane than in propylene, except for hydrogenated polybutadiene and polystyrene-block-(hydrogenated polybutadiene). Hydrogenated polybutadiene homopolymers and copolymers exhibit relatively pressure-independent crystallization and melting observed in both propane and propylene solutions.

  14. Impact of Fuel Interchangeability on dynamic Instabilities in Gas Turbine Engines

    SciTech Connect (OSTI)

    Ferguson, D.H.; Straub, D.L.; Richards, G.A.; Robey, E.H.

    2007-03-01T23:59:59.000Z

    Modern, low NOx emitting gas turbines typically utilize lean pre-mixed (LPM) combustion as a means of achieving target emissions goals. As stable combustion in LPM systems is somewhat intolerant to changes in operating conditions, precise engine tuning on a prescribed range of fuel properties is commonly performed to avoid dynamic instabilities. This has raised concerns regarding the use of imported liquefied natural gas (LNG) and natural gas liquids (NGL’s) to offset a reduction in the domestic natural gas supply, which when introduced into the pipeline could alter the fuel BTU content and subsequently exacerbate problems such as combustion instabilities. The intent of this study is to investigate the sensitivity of dynamically unstable test rigs to changes in fuel composition and heat content. Fuel Wobbe number was controlled by blending methane and natural gas with various amounts of ethane, propane and nitrogen. Changes in combustion instabilities were observed, in both atmospheric and pressurized test rigs, for fuels containing high concentrations of propane (> 62% by vol). However, pressure oscillations measured while operating on typical “LNG like” fuels did not appear to deviate significantly from natural gas and methane flame responses. Mechanisms thought to produce changes in the dynamic response are discussed.

  15. MRI of Heterogeneous Hydrogenation Reactions Using Parahydrogen Polarization

    E-Print Network [OSTI]

    Burt, Scott R

    2008-01-01T23:59:59.000Z

    of Propane Gas . . . . . . . . . . . . . . . . . . . . k-B.2.2 Model Propane Spectrum for TemperatureSpectra of Propylene and Propane ALTADENA Polarized Images

  16. Propane Vehicle and Infrastructure Codes and Standards Chart (Revised) (Fact Sheet), NREL (National Renewable Energy Laboratory)

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center HomeIdle Reduction WeightRebate - pipeline safety)Natural GasMany

  17. Propane Vehicle and Infrastructure Codes and Standards Citations (Brochure), NREL (National Renewable Energy Laboratory)

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center HomeIdle Reduction WeightRebate - pipeline safety)Natural GasMany

  18. Direct growth of few-layer graphene on 6H-SiC and 3C-SiC/Si via propane chemical vapor deposition

    SciTech Connect (OSTI)

    Michon, A.; Vezian, S.; Portail, M. [CNRS-CRHEA, Rue Bernard Gregory, 06560 Valbonne (France); Ouerghi, A. [CNRS-LPN, Route de Nozay, 91460 Marcoussis (France); Zielinski, M.; Chassagne, T. [NOVASiC, Savoie Technolac, Arche Bat 4, BP267, 73375 Le Bourget du Lac (France)

    2010-10-25T23:59:59.000Z

    We propose to grow graphene on SiC by a direct carbon feeding through propane flow in a chemical vapor deposition reactor. X-ray photoemission and low energy electron diffraction show that propane allows to grow few-layer graphene (FLG) on 6H-SiC(0001). Surprisingly, FLG grown on (0001) face presents a rotational disorder similar to that observed for FLG obtained by annealing on (000-1) face. Thanks to a reduced growth temperature with respect to the classical SiC annealing method, we have also grown FLG/3C-SiC/Si(111) in a single growth sequence. This opens the way for large-scale production of graphene-based devices on silicon substrate.

  19. Nanostructure of Solid Precipitates Obtained by Expansion of Polystyrene-block-Polybutadiene Solutions in Near Critical Propane: Block Ratio and Micellar Solution Effects

    SciTech Connect (OSTI)

    Green, Jade [University of Wyoming, Laramie; Tyrrell, Zachary [University of Wyoming, Laramie; Radosz, Maciej [University of Wyoming, Laramie; Hong, Kunlun [ORNL; Mays, Jimmy [ORNL

    2011-01-01T23:59:59.000Z

    In contrast to incompressible liquid solutions, compressible near-critical solutions of block copolymers allow for controlling rapid structure transformations with pressure alone. For example, when dissolved in near-critical propane, polystyrene-block-polybutadiene can form a random molecular solution at high pressures, a micellar solution at moderate pressures, and a solvent-free precipitate at low pressures. In contrast to the unstructured virgin copolymer, such a propane-treated precipitate rapidly self-assembles toward structures characteristic of equilibrated block copolymers, such as lamellae, spheres, or cylinders, which depend on the block ratio rather than on the decompression rate or temperature, at least within the rate and temperature ranges investigated in this work. At lower temperatures, however, say below 40 C, glass transition of the styrene-butadiene diblocks can inhibit independent structure formation, while crystallization of their hydrogenated-butadiene analogues can preserve the micellar-solution structure.

  20. Deuteration Can Impact Micellization Pressure and Cloud Pressure of Polystyrene-block-polybutadiene and Polystyrene-block-polyisoprene in Compressible Propane

    SciTech Connect (OSTI)

    Winoto, Winoto [University of Wyoming, Laramie; Shen, Youqin [University of Wyoming, Laramie; Radosz, Maciej [University of Wyoming, Laramie; Hong, Kunlun [ORNL; Mays, Jimmy [ORNL

    2009-01-01T23:59:59.000Z

    The deuterated homopolymers and their corresponding polystyrene-block-polybutadiene and polystyrene-block-polyisoprene copolymers require lower cloud pressures than their hydrogenous analogues to dissolve in a compressible alkane solvent, such as propane. For symmetric diblocks, deuteration reduces the micellization pressure. By contrast, for asymmetric diblocks with a long diene block relative to the styrene block, deuteration can increase the micellization pressure. All in all, however, the deuteration effects, while measurable, do not qualitatively change the principal diblock properties in compressible propane solutions, such as pressure-induced micelle decomposition, micelle formation and micelle size, and their temperature dependence. Therefore, isotope labeling should be a useful approach to neutron-scattering characterization for styrene-diene block copolymers in compressible alkane systems.

  1. H-gallosilicate (MFI) propane aromatization catalyst: Influence of Si/Ga ratio on acidity, activity and deactivation due to coking

    SciTech Connect (OSTI)

    Choudhary, V.R.; Kinage, A.K.; Sivadinarayana, C. [National Chemical Lab., Pune (India)] [and others] [National Chemical Lab., Pune (India); and others

    1996-01-01T23:59:59.000Z

    Influence of bulk Si/Ga ratio of H-gallosilicate (MFI) on its degalliation (during calcination for removal of template and deammoniation of NH{sub 4} form), acidity/acid strength distribution (measured by stepwise thermal desorption and chemisorption of pyridine at 50-400{degrees}C using GC techniques and also by acid catalyzed model reactions viz. iso-octane cracking and toluene disproportionation) and initial activity/product selectivity and catalyst deactivation in propane aromatization (at 550{degrees}C) has been investigated. Framework Si/Ga ratio was measured by {sup 29}Si MAS NMR. Information on the external acid sites is obtained by isooctane cracking. The influence of poisoning of strong acid sites (by pyridine) on acid catalyzed model reactions and the effect of deactivation on the product distribution in the propane aromatization have also been studied. 21 refs., 19 figs., 3 tabs.

  2. Acid strength of support materials as a factor controlling oxidation state of palladium catalyst for propane combustion

    SciTech Connect (OSTI)

    Yazawa, Yoshiteru; Yoshida, Hisao; Takagi, Nobuyuki; Komai, Shinichi; Satsuma, Atsushi; Hattori, Tadashi

    1999-10-01T23:59:59.000Z

    The support effect on the low temperature catalytic combustion of propane over palladium catalyst was studied by using a series of metal oxides as support materials: MgO, ZrO{sub 2}, Al{sub 2}O{sub 3}, SiO{sub 2}, SiO{sub 2}-ZrO{sub 2}, SiO{sub 2}-Al{sub 2}O{sub 3}, and SO{sub 4}{sup 2{minus}}-ZrO{sub 2}. The catalytic activity varied with the kind of support materials; a support material with moderate acid strength gave maximum conversion. In order to discuss more details, 5 wt% Pd/ZrO{sub 2}, Pd/Al{sub 2}O{sub 3}, and Pd/SiO{sub 2}-Al{sub 2}O{sub 3} were subjected to catalytic testing under the various conditions, and the catalysts after the test were characterized by XRD and XPS. The activity changed with the oxygen concentration, and the concentration providing the maximum activity depended on the support material. The maximum activity was obtained at high concentration on Pd/SiO{sub 2}-Al{sub 2}O{sub 3}, at moderate concentration on Pd/Al{sub 2}O{sub 3}, and at low concentration on Pd/ZrO{sub 2}. This sequence corresponded to that of acid strength of the support materials measured by Hammett indicators. The relation between the oxidation state of palladium and its catalytic activity under the various mixtures indicated that the catalytic activity on each catalyst depends on the oxidation state of palladium, and that partially oxidized palladium is effective for propane combustion. Moreover, palladium on acidic support kept the metallic state even under high oxygen concentration, indicating that acidic support gives palladium the resistibility against oxidation. These results suggest one guideline for the design of active palladium catalyst; an acidic support must be chosen under the mixture of the higher oxygen concentration and vice versa.

  3. Vanadium oxide based nanostructured materials for catalytic oxidative dehydrogenation of propane : effect of heterometallic centers on the catalyst performance.

    SciTech Connect (OSTI)

    Khan, M. I.; Deb, S.; Aydemir, K.; Alwarthan, A. A.; Chattopadhyay, S.; Miller, J. T.; Marshall, C. L. (Chemical Sciences and Engineering Division); (Illinois Inst. of Tech.); (King Saud Univ.)

    2010-01-01T23:59:59.000Z

    Catalytic properties of a series of new class of catalysts materials-[Co{sub 3}(H{sub 2}O){sub 12}V{sub 18}O{sub 42} (XO{sub 4})].24H{sub 2}O (VNM-Co), [Fe{sub 3}(H{sub 2}O){sub 12}V{sub 18}O{sub 42}(XO{sub 4})].24H{sub 2}O (VNM-Fe) (X = V, S) and [H{sub 6}Mn{sub 3}(H{sub 2}O){sub 12}V{sub 18}O{sub 42}(VO{sub 4})].30H{sub 2}O for the oxidative dehydrogenation of propane is studied. The open-framework nanostructures in these novel materials consist of three-dimensional arrays of {l_brace}V{sub 18}O{sub 42}(XO{sub 4}){r_brace} (X = V, S) clusters interconnected by {l_brace}-O-M-O-{r_brace} (M = Mn, Fe, Co) linkers. The effect of change in the heterometallic center M (M = Mn, Co, Fe) of the linkers on the catalyst performance was studied. The catalyst material with Co in the linker showed the best performance in terms of propane conversion and selectivity at 350 C. The material containing Fe was most active but least selective and Mn containing catalyst was least active. The catalysts were characterized by Temperature Programmed Reduction (TPR), BET surface area measurement, Diffuse Reflectance Infrared Fourier Transform Spectroscopy, and X-ray Absorption Spectroscopy. TPR results show that all three catalysts are easily reducible and therefore are active at relatively low temperature. In situ X-ray absorption near edge spectroscopy (XANES) and extended X-ray absorption fine structure spectroscopy (EXAFS) studies revealed that the oxidation state of Co(II) remained unchanged up to 425 C (even after pretreatment). The reduction of Co(II) into metallic form starts at 425 C and this process is completed at 600 C.

  4. Effects of pressure, temperature, and hydrogen during graphene growth on SiC(0001) using propane-hydrogen chemical vapor deposition

    SciTech Connect (OSTI)

    Michon, A.; Vezian, S.; Roudon, E.; Lefebvre, D.; Portail, M. [CNRS-CRHEA, Rue Bernard Gregory, 06560 Valbonne (France)] [CNRS-CRHEA, Rue Bernard Gregory, 06560 Valbonne (France); Zielinski, M.; Chassagne, T. [NOVASiC, Savoie Technolac, Arche Bat 4, BP267, 73375 Le Bourget du Lac (France)] [NOVASiC, Savoie Technolac, Arche Bat 4, BP267, 73375 Le Bourget du Lac (France)

    2013-05-28T23:59:59.000Z

    Graphene growth from a propane flow in a hydrogen environment (propane-hydrogen chemical vapor deposition (CVD)) on SiC differentiates from other growth methods in that it offers the possibility to obtain various graphene structures on the Si-face depending on growth conditions. The different structures include the (6{radical}3 Multiplication-Sign 6{radical}3)-R30 Degree-Sign reconstruction of the graphene/SiC interface, which is commonly observed on the Si-face, but also the rotational disorder which is generally observed on the C-face. In this work, growth mechanisms leading to the formation of the different structures are studied and discussed. For that purpose, we have grown graphene on SiC(0001) (Si-face) using propane-hydrogen CVD at various pressure and temperature and studied these samples extensively by means of low energy electron diffraction and atomic force microscopy. Pressure and temperature conditions leading to the formation of the different structures are identified and plotted in a pressure-temperature diagram. This diagram, together with other characterizations (X-ray photoemission and scanning tunneling microscopy), is the basis of further discussions on the carbon supply mechanisms and on the kinetics effects. The entire work underlines the important role of hydrogen during growth and its effects on the final graphene structure.

  5. Understanding the use of natural gas storage for generators of electricity

    SciTech Connect (OSTI)

    Beckman, K.L. [International Gas Consulting, Inc., Houston, TX (United States)

    1995-12-31T23:59:59.000Z

    Underground natural gas storage is aggressively used by a handful of utility electric generators in the United States. While storage facilities are often utilized by the natural gas pipeline industry and the local distribution companies (LDCs), regional electric generators have taken advantgage of abundant storage and pipeline capacity to develop very cost efficient gas fired electric generating capacity, especially for peaking demand. Most types of natural gas storage facilities are located underground, with a few based above-ground. These facilities have served two basic types of natural gas storage service requirements: seasonal baseload and needle peakshaving. Baseload services are typically developed in depleted oil and gas reservoirs and aquifers while mined caverns and LNG facilities (also Propane-air facilities) typically provide needle peakshaving services. Reengineering of the natural gas infrastructure will alter the historical use patterns, and will provide the electric industry with new gas supply management tools. Electric generators, as consumers of natural gas, were among the first open access shippers and, as a result of FERC Order 636, are now attempting to reposition themselves in the {open_quotes}new{close_quotes} gas industry. Stated in terms of historical consumption, the five largest gas burning utilities consume 40% of all the gas burned for electric generation, and the top twenty accounted for approximately 70%. Slightly more than 100 utilities, including municipals, have any gas fired generating capacity, a rather limited number. These five are all active consumers of storage services.

  6. Oilfield Flare Gas Electricity Systems (OFFGASES Project)

    SciTech Connect (OSTI)

    Rachel Henderson; Robert Fickes

    2007-12-31T23:59:59.000Z

    The Oilfield Flare Gas Electricity Systems (OFFGASES) project was developed in response to a cooperative agreement offering by the U.S. Department of Energy (DOE) and the National Energy Technology Laboratory (NETL) under Preferred Upstream Management Projects (PUMP III). Project partners included the Interstate Oil and Gas Compact Commission (IOGCC) as lead agency working with the California Energy Commission (CEC) and the California Oil Producers Electric Cooperative (COPE). The project was designed to demonstrate that the entire range of oilfield 'stranded gases' (gas production that can not be delivered to a commercial market because it is poor quality, or the quantity is too small to be economically sold, or there are no pipeline facilities to transport it to market) can be cost-effectively harnessed to make electricity. The utilization of existing, proven distribution generation (DG) technologies to generate electricity was field-tested successfully at four marginal well sites, selected to cover a variety of potential scenarios: high Btu, medium Btu, ultra-low Btu gas, as well as a 'harsh', or high contaminant, gas. Two of the four sites for the OFFGASES project were idle wells that were shut in because of a lack of viable solutions for the stranded noncommercial gas that they produced. Converting stranded gas to useable electrical energy eliminates a waste stream that has potential negative environmental impacts to the oil production operation. The electricity produced will offset that which normally would be purchased from an electric utility, potentially lowering operating costs and extending the economic life of the oil wells. Of the piloted sites, the most promising technologies to handle the range were microturbines that have very low emissions. One recently developed product, the Flex-Microturbine, has the potential to handle the entire range of oilfield gases. It is deployed at an oilfield near Santa Barbara to run on waste gas that is only 4% the strength of natural gas. The cost of producing oil is to a large extent the cost of electric power used to extract and deliver the oil. Researchers have identified stranded and flared gas in California that could generate 400 megawatts of power, and believe that there is at least an additional 2,000 megawatts that have not been identified. Since California accounts for about 14.5% of the total domestic oil production, it is reasonable to assume that about 16,500 megawatts could be generated throughout the United States. This power could restore the cost-effectiveness of thousands of oil wells, increasing oil production by millions of barrels a year, while reducing emissions and greenhouse gas emissions by burning the gas in clean distributed generators rather than flaring or venting the stranded gases. Most turbines and engines are designed for standardized, high-quality gas. However, emerging technologies such as microturbines have increased the options for a broader range of fuels. By demonstrating practical means to consume the four gas streams, the project showed that any gases whose properties are between the extreme conditions also could be utilized. The economics of doing so depends on factors such as the value of additional oil recovered, the price of electricity produced, and the alternate costs to dispose of stranded gas.

  7. Effect of heat recirculation on the self-sustained catalytic combustion of propane/air mixtures in a quartz reactor

    SciTech Connect (OSTI)

    Scarpa, A. [Dipartimento di Ingegneria Chimica, Universita degli Studi di Napoli ''Federico II'', P.le V. Tecchio 80, 80125 Naples (Italy); Department of Chemical Engineering, Center for Catalytic Science and Technology (CCST), and Center for Composite Materials (CCM), University of Delaware, 150 Academy Street, Newark, DE 19716 (United States); Pirone, R. [Istituto di Ricerche sulla Combustione-CNR, P.le V. Tecchio 80, 80125 Naples (Italy); Russo, G. [Dipartimento di Ingegneria Chimica, Universita degli Studi di Napoli ''Federico II'', P.le V. Tecchio 80, 80125 Naples (Italy); Vlachos, D.G. [Department of Chemical Engineering, Center for Catalytic Science and Technology (CCST), and Center for Composite Materials (CCM), University of Delaware, 150 Academy Street, Newark, DE 19716 (United States)

    2009-05-15T23:59:59.000Z

    The self-sustained catalytic combustion of propane is experimentally studied in a two-pass, quartz heat-recirculation reactor (HRR) and compared to that in a no (heat) recirculation reactor (NRR). Structured monolithic reactors with Pt/{gamma}-Al{sub 2}O{sub 3}, LaMnO{sub 3}/{gamma}-Al{sub 2}O{sub 3}, and Pt doped perovskite catalysts have been compared in the HRR and NRR configurations. Heat recirculation enhances combustion stability, by widening the operating window of self-sustained operation, and changes the mode of stability loss from blowout to extinction. It is found that thermal shields (upstream and downstream of the monolith) play no role in the stability of a HRR but increase the stability of a NRR. The stability of a HRR follows this trend: Pt/{gamma}-Al{sub 2}O{sub 3} > doped perovskite > LaMnO{sub 3}/{gamma}-Al{sub 2}O{sub 3}. Finally, a higher cell density monolith enlarges the operating window of self-sustained combustion, and allows further increase of the power density of the process. (author)

  8. Synthesis of Pt?Pd Core?Shell Nanostructures by Atomic Layer Deposition: Application in Propane Oxidative Dehydrogenation to Propylene

    SciTech Connect (OSTI)

    Lei, Y.; Liu, Bin; Lu, Junling; Lobo-Lapidus, Rodrigo J.; Wu, Tianpin; Feng, Hao; Xia, Xiaoxing; Mane, Anil U.; Libera, Joseph A.; Greeley, Jeffrey P.; Miller, Jeffrey T.; Elam, J. W.

    2012-08-20T23:59:59.000Z

    Atomic layer deposition (ALD) was employed to synthesize supported Pt?Pd bimetallic particles in the 1 to 2 nm range. The metal loading and composition of the supported Pt?Pd nanoparticles were controlled by varying the deposition temperature and by applying ALD metal oxide coatings to modify the support surface chemistry. Highresolution scanning transmission electron microscopy images showed monodispersed Pt?Pd nanoparticles on ALD Al2O3 - and TiO2 -modi?ed SiO2 gel. X-ray absorption spectroscopy revealed that the bimetallic nanoparticles have a stable Pt-core, Pd-shell nanostructure. Density functional theory calculations revealed that the most stable surface con?guration for the Pt? Pd alloys in an H2 environment has a Pt-core, Pd-shell nanostructure. In comparison to their monometallic counterparts, the small Pt?Pd bimetallic core?shell nanoparticles exhibited higher activity in propane oxidative dehydrogenation as compared to their physical mixture.

  9. Dynamic light scattering in sooting premixed atmospheric-pressure methane-, propane-, ethene-, and propene-oxygen flames

    SciTech Connect (OSTI)

    Lamprecht, A.; Eimer, W.; Kohse-Hoeinghaus, K. [Univ. Bielefeld (Germany)] [Univ. Bielefeld (Germany)

    1999-07-01T23:59:59.000Z

    In a systematic investigation under well-defined flame conditions, dynamic light scattering (DLS) was applied to the determination of soot particle radii with the aim of examining the suitability of this technique for accurate soot particle sizing. In particular, flat premixed methane-, propane-, ethene-, and propene-oxygen flames at atmospheric pressure were investigated, and particle sizes were obtained as a function of stoichiometry and height above the burner surface. In combination with absorption measurements, soot volume fraction and particle number density were determined; also, the temperature was measured at each flame condition. In comparison to absorption techniques, attractive features of DLS are its independence of the particle refractive index and its insensitivity to fluorescence interference; also, it offers spatial resolution. In principle, additional information on the particle size distribution as well as on the global shape of the particles may be obtained from DLS experiments. This study is therefore an evaluation of the potential of DLS as a complement to other soot diagnostic techniques.

  10. Propane ammoxidation over the Mo-V-Te-Nb-O M1 phase: Reactivity of surface cations in hydrogen abstraction steps

    SciTech Connect (OSTI)

    Muthukumar, Kaliappan [University of Cincinnati; Yu, Junjun [University of Cincinnati; Xu, Ye [ORNL; Guliants, Vadim V. [University of Cincinnati

    2011-01-01T23:59:59.000Z

    Density functional theory calculations (GGA-PBE) have been performed to investigate the adsorption of C3 (propane, isopropyl, propene, and allyl) and H species on the proposed active center present in the surface ab planes of the bulk Mo-V-Te-Nb-O M1 phase in order to better understand the roles of the different surface cations in propane ammoxidation. Modified cluster models were employed to isolate the closely spaced V=O and Te=O from each other and to vary the oxidation state of the V cation. While propane and propene adsorb with nearly zero adsorption energy, the isopropyl and allyl radicals bind strongly to V=O and Te=O with adsorption energies, {Delta}E, being {le} -1.75 eV, but appreciably more weakly on other sites, such as Mo=O, bridging oxygen (Mo-O-V and Mo-O-Mo), and empty metal apical sites ({Delta}E > -1 eV). Atomic H binds more strongly to Te = O ({Delta}E {le} -3 eV) than to all the other sites, including V = O ({Delta}E = -2.59 eV). The reduction of surface oxo groups by dissociated H and their removal as water are thermodynamically favorable except when both H atoms are bonded to the same Te=O. Consistent with the strong binding of H, Te=O is markedly more active at abstracting the methylene H from propane (E{sub a} {le} 1.01 eV) than V = O (E{sub a} = 1.70 eV on V{sup 5+} = O and 2.13 eV on V{sup 4+} = O). The higher-than-observed activity and the loose binding of Te = O moieties to the mixed metal oxide lattice of M1 raise the question of whether active Te = O groups are in fact present in the surface ab planes of the M1 phase under propane ammoxidation conditions.

  11. Development of Ultra-low Platinum Alloy Cathode Catalyst for...

    Energy Savers [EERE]

    Alloy Cathode Catalyst for PEM Fuel Cells These slides were presented at the 2010 New Fuel Cell Projects Meeting on September 28, 2010. 7uscpopov.pdf More Documents &...

  12. Charge pumping techniques in ultra-low current transconductor design

    E-Print Network [OSTI]

    Becker-Gomez, Adriana

    2002-01-01T23:59:59.000Z

    Irequency from 480 KHz to 16MHZ . 61 Figure III-5 Experimental and theoretical Gm values as a function of frequency for rl=l. g . 62 Figure III-6 Input offset as a function of tail current for the single ended OTA. . . 63 Figure III-7 Cross... in the occupancy of the traps until t=te Vo Voo Accum la i n mT b) Depletion Inversion ss vw-vr a t, tz ts ts t t tr Ec c) Fl Ev Ee E, Es Ez a stead -state (b)electron emission ' (c) hole capture lz s (e) h (d)steady-state (I...

  13. An Ultra-Low-Power Programmable Analog Bionic Ear Processor

    E-Print Network [OSTI]

    Sarpeshkar, Rahul

    2004-09-28T23:59:59.000Z

    We report a programmable analog bionic ear (cochlear implant) processor in a 1.5µm BiCMOS technology with a power

  14. Operation of buck regulator with ultra-low input voltage

    E-Print Network [OSTI]

    Harris, Cory Angelo

    2014-01-01T23:59:59.000Z

    Based on the LTC3621 and LTC3624, the designed buck regulator proposed in this thesis aims to lower the allowed input voltage and increase efficiency compared to the original part without making significant changes to ...

  15. AUTONOMOUS ULTRA-LOW POWER ELF/VLF RECEIVER SYSTEMS

    E-Print Network [OSTI]

    less v #12;power than a typical LED indicator lamp while capturing high fidelity ELF/VLF magnetic field

  16. Ultra low thermal expansion, highly thermal shock resistant ceramic

    DOE Patents [OSTI]

    Limaye, S.Y.

    1996-01-30T23:59:59.000Z

    Three families of ceramic compositions having the given formula: {phi}{sub 1+X}Zr{sub 4}P{sub 6{minus}2X}Si{sub 2X}O{sub 24}, {phi}{sub 1+X}Zr{sub 4{minus}2X}Y{sub 2X}P{sub 6}O{sub 24} and {phi}{sub 1+X}Zr{sub 4{minus}X}Y{sub X}P{sub 6{minus}2X}Si{sub X}O{sub 24} wherein {phi} is either strontium or barium and X has a value from about 0.2 to about 0.8 have been disclosed. Ceramics formed from these compositions exhibit very low, generally near neutral, thermal expansion over a wide range of elevated temperatures. 7 figs.

  17. An Ultra-Low Background PMT for Liquid Xenon Detectors

    E-Print Network [OSTI]

    D. S. Akerib; X. Bai; E. Bernard; A. Bernstein; A. Bradley; D. Byram; S. B. Cahn; M. C. Carmona-Benitez; D. Carr; J. J. Chapman; Y-D. Chan; K. Clark; T. Coffey; L. deViveiros; M. Dragowsky; E. Druszkiewicz; B. Edwards; C. H. Faham; S. Fiorucci; R. J. Gaitskell; K. R. Gibson; C. Hall; M. Hanhardt; B. Holbrook; M. Ihm; R. G. Jacobsen; L. Kastens; K. Kazkaz; N. Larsen; C. Lee; K. Lesko; A. Lindote; M. I. Lopes; A. Lyashenko; D. C. Malling; R. Mannino; D. McKinsey; D. Mei; J. Mock; M. Morii; H. Nelson; F. Neves; J. A. Nikkel; M. Pangilinan; K. Pech; P. Phelps; T. Shutt; C. Silva; W. Skulski; V. N. Solovov; P. Sorensen; J. Spaans; T. Stiegler; M. Sweany; M. Szydagis; D. Taylor; J. Thomson; M. Tripathi; S. Uvarov; J. R. Verbus; N. Walsh; R. Webb; J. T. White; M. Wlasenko; F. L. H. Wolfs; M. Woods; C. Zhang

    2013-06-24T23:59:59.000Z

    Results are presented from radioactivity screening of two models of photomultiplier tubes designed for use in current and future liquid xenon experiments. The Hamamatsu 5.6 cm diameter R8778 PMT, used in the LUX dark matter experiment, has yielded a positive detection of four common radioactive isotopes: 238U, 232Th, 40K, and 60Co. Screening of LUX materials has rendered backgrounds from other detector materials subdominant to the R8778 contribution. A prototype Hamamatsu 7.6 cm diameter R11410 MOD PMT has also been screened, with benchmark isotope counts measured at <0.4 238U / <0.3 232Th / <8.3 40K / 2.0+-0.2 60Co mBq/PMT. This represents a large reduction, equal to a change of \\times 1/24 238U / \\times 1/9 232Th / \\times 1/8 40K per PMT, between R8778 and R11410 MOD, concurrent with a doubling of the photocathode surface area (4.5 cm to 6.4 cm diameter). 60Co measurements are comparable between the PMTs, but can be significantly reduced in future R11410 MOD units through further material selection. Assuming PMT activity equal to the measured 90% upper limits, Monte Carlo estimates indicate that replacement of R8778 PMTs with R11410 MOD PMTs will change LUX PMT electron recoil background contributions by a factor of \\times1/25 after further material selection for 60Co reduction, and nuclear recoil backgrounds by a factor of \\times 1/36. The strong reduction in backgrounds below the measured R8778 levels makes the R11410 MOD a very competitive technology for use in large-scale liquid xenon detectors.

  18. Ultra-low Q values for neutrino mass measurements

    E-Print Network [OSTI]

    Joachim Kopp; Alexander Merle

    2010-04-21T23:59:59.000Z

    We investigate weak nuclear decays with extremely small kinetic energy release (Q value) and thus extremely good sensitivity to the absolute neutrino mass scale. In particular, we consider decays into excited daughter states, and we show that partial ionization of the parent atom can help to tune Q values to low-Q decays might only be feasible if no ionization is required, and if future improvements in isotope production technology, nuclear mass spectroscopy, and atomic structure calculations are possible. Experiments using ions, however, are extremely challenging due to the large number of ions that must be stored. New precision data on nuclear excitation levels could help to identify further isotopes with low-Q decay modes and possibly less challenging requirements.

  19. Thermally Stable Ultra-Low Temperature Oxidation Catalysts

    SciTech Connect (OSTI)

    Szanyi, Janos; Peden, Charles HF; Howden, Ken; Kim, Chang H.; Oh, Se H.; Schmieg, Steven J.

    2014-12-09T23:59:59.000Z

    This annual reports describes recent results of a CRADA between General Motors Company (GM) and Battelle/Pacific Northwest National Laboratory (PNNL). In the CRADA, we are investigating a number of candidate low temperature oxidation catalysts as fresh materials, and after realistic laboratory- and engine-aging. These studies will lead to a better understanding of fundamental characteristics and various aging factors that impact the long-term performance of catalysts, while also providing an assessment of the appropriateness of the laboratory conditions in realistically reproducing the effects of actual engine aging conditions.

  20. Demonstration of Ultra Low Dissipation Optomechanical Resonators on a Chip

    E-Print Network [OSTI]

    G. Anetsberger; R. Rivière; A. Schliesser; O. Arcizet; T. J. Kippenberg

    2008-07-18T23:59:59.000Z

    Cavity-enhanced radiation-pressure coupling of optical and mechanical degrees of freedom gives rise to a range of optomechanical phenomena, in particular providing a route to the quantum regime of mesoscopic mechanical oscillators. A prime challenge in cavity optomechanics has however been to realize systems which simultaneously maximize optical finesse and mechanical quality. Here we demonstrate for the first time independent control over both mechanical and optical degree of freedom within one and the same on-chip resonator. The first direct observation of mechanical normal mode coupling in a micromechanical system allows for a quantitative understanding of mechanical dissipation. Subsequent optimization of the resonator geometry enables intrinsic material loss limited mechanical Q-factors, rivalling the best values reported in the high MHz frequency range, while simultaneously preserving the resonators' ultra-high optical finesse. Besides manifesting a complete understanding of mechanical dissipation in microresonator based optomechanical systems, our results provide an ideal setting for cavity optomechanics.