Sample records for absorption condensation adsorption

  1. Ne pas confondre Absorption Adsorption

    E-Print Network [OSTI]

    Liège, Université de

    Ne pas confondre Absorption Adsorption et Quand des molécules sont amenées en contact avec un'attachent simplement à la surface du solide on parle d'adsorption. L'adsorption est donc le « collage » de molécules à la surface d'un solide. Quand le charbon nettoie Principes physiques de l'adsorption Cédric Gommes

  2. THE EFFECTS OF NON-CONDENSIBLE GAS AND SALINITY ON STEAM ADSORPTION

    E-Print Network [OSTI]

    Stanford University

    THE EFFECTS OF NON-CONDENSIBLE GAS AND SALINITY ON STEAM ADSORPTION A REPORT SUBMITTED for his constant help in my navigating the Latex maze. 111 ... #12;Abstract Water adsorption in geothermal and experimental results in- dicate that water adsorption exists in the vapor-dominated type of reservoir

  3. Adsorption and Thermal Condensation Mechanisms of Amino Acids on Oxide Supports : 2/. Theoretical and

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Adsorption and Thermal Condensation Mechanisms of Amino Acids on Oxide Supports : 2/. Theoretical and experimental study of the adsorption of neutral glycine on silica from the gas phase C. Lomenech, G. Bery, D, published in "ChemPhysChem 6 (2005) 1061-1070" #12;ABSTRACT The adsorption of neutral glycine onto amorphous

  4. Use of X-ray Absorption Spectroscopy to Distinguish Between Inner And Outer-sphere Pb Adsorption Complexes on Montmorillonite

    E-Print Network [OSTI]

    Sparks, Donald L.

    Use of X-ray Absorption Spectroscopy to Distinguish Between Inner And Outer-sphere Pb Adsorption on the functional groups at the edges of the montmorillonite. At I = 0.002 M Pb absorption was less dependent

  5. Adsorption and Reaction of NO on Cu(100): An Infrared Reflection Absorption Spectroscopic Study at 25 K

    E-Print Network [OSTI]

    Goodman, Wayne

    Adsorption and Reaction of NO on Cu(100): An Infrared Reflection Absorption Spectroscopic Study oxide (NO) on a Cu(100) surface at 25 K has been studied using infrared reflection absorption to the Cu(100) surface. Heating to 55 K leads to reorientation of the dimer molecules in the multilayer

  6. Triple-effect absorption refrigeration system with double-condenser coupling

    DOE Patents [OSTI]

    DeVault, R.C.; Biermann, W.J.

    1993-04-27T23:59:59.000Z

    A triple effect absorption refrigeration system is provided with a double-condenser coupling and a parallel or series circuit for feeding the refrigerant-containing absorbent solution through the high, medium, and low temperature generators utilized in the triple-effect system. The high temperature condenser receiving vaporous refrigerant from the high temperature generator is double coupled to both the medium temperature generator and the low temperature generator to enhance the internal recovery of heat within the system and thereby increase the thermal efficiency thereof.

  7. Triple-effect absorption refrigeration system with double-condenser coupling

    DOE Patents [OSTI]

    DeVault, Robert C. (Knoxville, TN); Biermann, Wendell J. (Fayetteville, NY)

    1993-01-01T23:59:59.000Z

    A triple effect absorption refrigeration system is provided with a double-condenser coupling and a parallel or series circuit for feeding the refrigerant-containing absorbent solution through the high, medium, and low temperature generators utilized in the triple-effect system. The high temperature condenser receiving vaporous refrigerant from the high temperature generator is double coupled to both the medium temperature generator and the low temperature generator to enhance the internal recovery of heat within the system and thereby increase the thermal efficiency thereof.

  8. A first principle study for the adsorption and absorption of carbon atom and the CO dissociation on Ir(100) surface

    SciTech Connect (OSTI)

    Erikat, I. A., E-mail: ihsanas@yahoo.com [Department of Physics, Jerash University, Jerash-26150 (Jordan); Hamad, B. A. [Department of Physics, The University of Jordan, Amman-11942 (Jordan)] [Department of Physics, The University of Jordan, Amman-11942 (Jordan)

    2013-11-07T23:59:59.000Z

    We employ density functional theory to examine the adsorption and absorption of carbon atom as well as the dissociation of carbon monoxide on Ir(100) surface. We find that carbon atoms bind strongly with Ir(100) surface and prefer the high coordination hollow site for all coverages. In the case of 0.75?ML coverage of carbon, we obtain a bridging metal structure due to the balance between Ir–C and Ir–Ir interactions. In the subsurface region, the carbon atom prefers the octahedral site of Ir(100) surface. We find large diffusion barrier for carbon atom into Ir(100) surface (2.70 eV) due to the strong bonding between carbon atom and Ir(100) surface, whereas we find a very small segregation barrier (0.22 eV) from subsurface to the surface. The minimum energy path and energy barrier for the dissociation of CO on Ir(100) surface are obtained by using climbing image nudge elastic band. The energy barrier of CO dissociation on Ir(100) surface is found to be 3.01 eV, which is appreciably larger than the association energy (1.61 eV) of this molecule.

  9. absorptivity: Topics by E-print Network

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

    confondre Absorption Adsorption Mathematics Websites Summary: Ne pas confondre Absorption Adsorption et Quand des molcules sont amenes en contact avec un'attachent...

  10. Seven-effect absorption refrigeration

    DOE Patents [OSTI]

    DeVault, Robert C. (Knoxville, TN); Biermann, Wendell J. (Fayetteville, NY)

    1989-01-01T23:59:59.000Z

    A seven-effect absorption refrigeration cycle is disclosed utilizing three absorption circuits. In addition, a heat exchanger is used for heating the generator of the low absorption circuit with heat rejected from the condenser and absorber of the medium absorption circuit. A heat exchanger is also provided for heating the generator of the medium absorption circuit with heat rejected from the condenser and absorber of the high absorption circuit. If desired, another heat exchanger can also be provided for heating the evaporator of the high absorption circuit with rejected heat from either the condenser or absorber of the low absorption circuit.

  11. Seven-effect absorption refrigeration

    DOE Patents [OSTI]

    DeVault, R.C.; Biermann, W.J.

    1989-05-09T23:59:59.000Z

    A seven-effect absorption refrigeration cycle is disclosed utilizing three absorption circuits. In addition, a heat exchanger is used for heating the generator of the low absorption circuit with heat rejected from the condenser and absorber of the medium absorption circuit. A heat exchanger is also provided for heating the generator of the medium absorption circuit with heat rejected from the condenser and absorber of the high absorption circuit. If desired, another heat exchanger can also be provided for heating the evaporator of the high absorption circuit with rejected heat from either the condenser or absorber of the low absorption circuit. 1 fig.

  12. adsorption isotherm studies: Topics by E-print Network

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

    (ACI) is thought (more) CHEN, WEI-CHIN 2004-01-01 30 Polymer adsorption on a fractal substrate: numerical study Condensed Matter (arXiv) Summary: We study the adsorption...

  13. Arsenate Adsorption Mechanisms at the Allophane-Water Interface

    E-Print Network [OSTI]

    Sparks, Donald L.

    Arsenate Adsorption Mechanisms at the Allophane-Water Interface Y U J I A R A I , * , , D . L aluminosilicate mineral (synthetic allophane) surfaces using batch adsorption experiments, powder X-ray diffraction (XRD), and X-ray absorption spectroscopy (XAS). The adsorption isotherm experiments indicated

  14. adsorption heat: Topics by E-print Network

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

    Condensator 12;12 Low-temperature heat sources Geothermal source Ambient air Solar adsorption heat pump, but the use of the source for hot water or direct heating can be...

  15. Effect of Zinc (Zn (II)) on the Adsorption Mechanisms of Arsenate (As (V)) at the

    E-Print Network [OSTI]

    Sparks, Donald L.

    Effect of Zinc (Zn (II)) on the Adsorption Mechanisms of Arsenate (As (V)) at the Goethite of As and Zn adsorption on goethite was investigated over a pH range of 3 to 10. X-ray absorption fine adsorption on goethite. The macroscopic data show that As adsorption on goethite was envelope

  16. absorption heat pumps: Topics by E-print Network

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

    Heating capacity k jet nozzle Closed Cycles: AbsorptionAdsorption heat pump thermal compressor driven by waste heat1 Industrial heat pumps in Germany - potentials,...

  17. absorption heat pump: Topics by E-print Network

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

    Heating capacity k jet nozzle Closed Cycles: AbsorptionAdsorption heat pump thermal compressor driven by waste heat1 Industrial heat pumps in Germany - potentials,...

  18. Evaporation and Condensation of Large Droplets in the Presence of Inert Admixtures Containing Soluble Gas

    E-Print Network [OSTI]

    Elperin, Tov

    the mutual influence of heat and mass transfer during gas absorption and evaporation or condensation transfer during gas absorption by liquid droplets and during droplets evaporation and va- por condensationEvaporation and Condensation of Large Droplets in the Presence of Inert Admixtures Containing

  19. Efficient solar cooling: first ever non-tracking solar collectors powering a double effect absorption chiller

    E-Print Network [OSTI]

    Poiry, Heather Marie

    2011-01-01T23:59:59.000Z

    Based Performance Analysis of a Solar Absorption Cooling andExperimental Investigation of a Solar Adsorption ChillerKreith, Jan F. Kreider. "Solar Cooling." Principles of Solar

  20. Coupled dual loop absorption heat pump

    DOE Patents [OSTI]

    Sarkisian, Paul H. (Watertown, MA); Reimann, Robert C. (Lafayette, NY); Biermann, Wendell J. (Fayetteville, NY)

    1985-01-01T23:59:59.000Z

    A coupled dual loop absorption system which utilizes two separate complete loops. Each individual loop operates at three temperatures and two pressures. This low temperature loop absorber and condenser are thermally coupled to the high temperature loop evaporator, and the high temperature loop condenser and absorber are thermally coupled to the low temperature generator.

  1. Methane Adsorption and Dissociation and Oxygen Adsorption and...

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

    Methane Adsorption and Dissociation and Oxygen Adsorption and Reaction with CO on Pd Nanoparticles on MgO(100) and on Pd(111). Methane Adsorption and Dissociation and Oxygen...

  2. Deformation of Silica Aerogel During Fluid Adsorption

    E-Print Network [OSTI]

    Tobias Herman; James Day; John Beamish

    2005-06-30T23:59:59.000Z

    Aerogels are very compliant materials - even small stresses can lead to large deformations. In this paper we present measurements of the linear deformation of high porosity aerogels during adsorption of low surface tension fluids, performed using a Linear Variable Differential Transformer (LVDT). We show that the degree of deformation of the aerogel during capillary condensation scales with the surface tension, and extract the bulk modulus of the gel from the data. Furthermore we suggest limits on safe temperatures for filling and emptying low density aerogels with helium.

  3. atomization atomic absorption: Topics by E-print Network

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

    cells to modern observations of dust clouds in stellar nebulas and Bose-Einstein condensates. Here we show the first absorption imaging of a single atom isolated in vacuum. The...

  4. Economical Condensing Turbines? 

    E-Print Network [OSTI]

    Dean, J. E.

    1997-01-01T23:59:59.000Z

    Steam turbines have long been used at utilities and in industry to generate power. There are three basic types of steam turbines: condensing, letdown and extraction/condensing. • Letdown turbines reduce the pressure of the incoming steam to one...

  5. Hybrid adsorptive membrane reactor

    DOE Patents [OSTI]

    Tsotsis, Theodore T. (Huntington Beach, CA); Sahimi, Muhammad (Altadena, CA); Fayyaz-Najafi, Babak (Richmond, CA); Harale, Aadesh (Los Angeles, CA); Park, Byoung-Gi (Yeosu, KR); Liu, Paul K. T. (Lafayette Hill, PA)

    2011-03-01T23:59:59.000Z

    A hybrid adsorbent-membrane reactor in which the chemical reaction, membrane separation, and product adsorption are coupled. Also disclosed are a dual-reactor apparatus and a process using the reactor or the apparatus.

  6. in Condensed Matter Physics

    E-Print Network [OSTI]

    van der Torre, Leon

    Master in Condensed Matter Physics ­ Master académique #12;2 #12;3 Students at the University. Condensed matter physics is about explaining and predicting the relationship between the atomic, and broad education in the field of condensed matter physics · introduce you to current research topics

  7. Thermodynamic formalism of water uptakes on solid porous adsorbents for adsorption cooling applications

    SciTech Connect (OSTI)

    Sun, Baichuan; Chakraborty, Anutosh, E-mail: AChakraborty@ntu.edu.sg [School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore)

    2014-05-19T23:59:59.000Z

    This Letter presents a thermodynamic formulation to calculate the amount of water vapor uptakes on various adsorbents such as zeolites, metal organic frameworks, and silica gel for the development of an advanced adsorption chiller. This formalism is developed from the rigor of the partition distribution function of each water vapor adsorptive site on adsorbents and the condensation approximation of adsorptive water molecules and is validated with experimental data. An interesting and useful finding has been established that the proposed model is thermodynamically connected with the pore structures of adsorbent materials, and the water vapor uptake highly depends on the isosteric heat of adsorption at zero surface coverage and the adsorptive sites of the adsorbent materials. Employing the proposed model, the thermodynamic trends of water vapor uptakes on various adsorbents can be estimated.

  8. Integrated vacuum absorption steam cycle gas separation

    DOE Patents [OSTI]

    Chen, Shiaguo (Champaign, IL); Lu, Yonggi (Urbana, IL); Rostam-Abadi, Massoud (Champaign, IL)

    2011-11-22T23:59:59.000Z

    Methods and systems for separating a targeted gas from a gas stream emitted from a power plant. The gas stream is brought into contact with an absorption solution to preferentially absorb the targeted gas to be separated from the gas stream so that an absorbed gas is present within the absorption solution. This provides a gas-rich solution, which is introduced into a stripper. Low pressure exhaust steam from a low pressure steam turbine of the power plant is injected into the stripper with the gas-rich solution. The absorbed gas from the gas-rich solution is stripped in the stripper using the injected low pressure steam to provide a gas stream containing the targeted gas. The stripper is at or near vacuum. Water vapor in a gas stream from the stripper is condensed in a condenser operating at a pressure lower than the stripper to concentrate the targeted gas. Condensed water is separated from the concentrated targeted gas.

  9. Triple effect absorption chiller utilizing two refrigeration circuits

    DOE Patents [OSTI]

    DeVault, Robert C. (Knoxville, TN)

    1988-01-01T23:59:59.000Z

    A triple effect absorption method and apparatus having a high coefficient of performance. Two single effect absorption circuits are combined with heat exchange occurring between a condenser and absorber of a high temperature circuit, and a generator of a low temperature circuit. The evaporators of both the high and low temperature circuits provide cooling to an external heat load.

  10. Steam and Condensate Systems

    E-Print Network [OSTI]

    Yates, W.

    1979-01-01T23:59:59.000Z

    efficiency and profit. Some important factors to consider in steam and condensate systems are: 1) Proper steam pressure 2) Adequate sized steam lines 3) Adequate sized condensate return lines 4) Utilization of flash steam 5) Properly sized... ! can cause system inefficiency. i Adequate sized steam lines assure the process will be furnished with sufficiertt i quantities of steam at the proper pressure. Adequate sized condensate return lines are essential to overall efficiency. lhese...

  11. Economical Condensing Turbines?

    E-Print Network [OSTI]

    Dean, J. E.

    Economical Condensing Turbines? by J.E.Dean, P.E. Steam turbines have long been used at utilities and in industry to generate power. There are three basic types of steam turbines: condensing, letdown 1 and extraction/condensing. ? Letdown... turbines reduce the pressure of the incoming steam to one or more pressures and generate power very efficiently, assuming that all the letdown steam has a use. Two caveats: ? Letdown turbines produce power based upon steam requirements and not based upon...

  12. Quark Condensates: Flavour Dependence

    E-Print Network [OSTI]

    R. Williams; C. S. Fischer; M. R. Pennington

    2007-03-23T23:59:59.000Z

    We determine the q-bar q condensate for quark masses from zero up to that of the strange quark within a phenomenologically successful modelling of continuum QCD by solving the quark Schwinger-Dyson equation. The existence of multiple solutions to this equation is the key to an accurate and reliable extraction of this condensate using the operator product expansion. We explain why alternative definitions fail to give the physical condensate.

  13. Of Matters Condensed

    E-Print Network [OSTI]

    Shulman, Michael

    2015-01-01T23:59:59.000Z

    The American Physical Society (APS) March Meeting of condensed matter physics has grown to nearly 10,000 participants, comprises 23 individual APS groups, and even warrants its own hashtag (#apsmarch). Here we analyze the text and data from March Meeting abstracts of the past nine years and discuss trends in condensed matter physics over this time period. We find that in comparison to atomic, molecular, and optical physics, condensed matter changes rapidly, and that condensed matter appears to be moving increasingly toward subject matter that is traditionally in materials science and engineering.

  14. EPRI condensate polisher guidelines

    SciTech Connect (OSTI)

    Larkin, B.A.; Webb, L.C.; Sawochka, S.G.; Crits, G.J.; Pocock, F.J.; Wirth, L.

    1995-01-01T23:59:59.000Z

    Cycle chemistry is one of the most important contributors to the loss of availability of generating units. Condensate polishing can significantly improve cycle chemistry by improving cycle water quality and minimizing the transport of contaminants in the power cycle. The EPRI-funded project described in this paper developed comprehensive guidelines for condensate polishing based upon information gathered from utility surveys, equipment vendors, and resin suppliers. Existing literature was also surveyed for pertinent input. Comprehensive guidelines which outline guidance for design, operation, maintenance, surveillance, management, and retrofitting of condensate polishing systems were developed. Economics of condensate polishing were evaluated and a roadmap for economic evaluation for utilities to follow was produced.

  15. Re-Condensation

    E-Print Network [OSTI]

    Bhatia, P.; Kozman, T.

    2004-01-01T23:59:59.000Z

    supplied in the boiler is used and the remainder, about 25%, is still held by the condensed water. The heat required to raise the temperature of the makeup water at around 50 OF to the required temperature, is very costly. As most condensate return... condensate is returned, less makeup is required, hence saving on water and makeup water treatment costs. The high purity of the condensate allows for greater boiler cycles of concentration, thus reducing water and energy losses to blowdown. The high heat...

  16. Finite-momentum condensation in a pumped microcavity

    SciTech Connect (OSTI)

    Brierley, R. T. [Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE (United Kingdom); Eastham, P. R. [Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE (United Kingdom); School of Physics, Trinity College, Dublin 2 (Ireland)

    2010-07-15T23:59:59.000Z

    We calculate the absorption spectra of a semiconductor microcavity into which a nonequilibrium exciton population has been pumped. We predict strong peaks in the spectrum corresponding to collective modes analogous to the Cooper modes in superconductors and fermionic atomic gases. These modes can become unstable, leading to the formation of off-equilibrium quantum condensates. We calculate a phase diagram for condensation and show that the dominant instabilities can be at a finite momentum. Thus we predict the formation of inhomogeneous condensates, similar to Fulde-Ferrel-Larkin-Ovchinnikov states.

  17. Effect of hydrocarbon adsorption on the wettability of rare earth oxide ceramics

    SciTech Connect (OSTI)

    Preston, Daniel J.; Miljkovic, Nenad; Sack, Jean; Queeney, John; Wang, Evelyn N., E-mail: enwang@mit.edu [Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Enright, Ryan [Thermal Management Research Group, Efficient Energy Transfer (etaET) Department, Bell Labs Ireland, Dublin 15 (Ireland)

    2014-07-07T23:59:59.000Z

    Vapor condensation is routinely used as an effective means of transferring heat, with dropwise condensation exhibiting a 5???7x heat transfer improvement compared to filmwise condensation. However, state-of-the-art techniques to promote dropwise condensation rely on functional hydrophobic coatings, which are often not robust and therefore undesirable for industrial implementation. Natural surface contamination due to hydrocarbon adsorption, particularly on noble metals, has been explored as an alternative approach to realize stable dropwise condensing surfaces. While noble metals are prohibitively expensive, the recent discovery of robust rare earth oxide (REO) hydrophobicity has generated interest for dropwise condensation applications due to material costs approaching 1% of gold; however, the underlying mechanism of REO hydrophobicity remains under debate. In this work, we show through careful experiments and modeling that REO hydrophobicity occurs due to the same hydrocarbon adsorption mechanism seen previously on noble metals. To investigate adsorption dynamics, we studied holmia and ceria REOs, along with control samples of gold and silica, via X-Ray photoelectron spectroscopy (XPS) and dynamic time-resolved contact angle measurements. The contact angle and surface carbon percent started at ?0 on in-situ argon-plasma-cleaned samples and increased asymptotically over time after exposure to laboratory air, with the rare earth oxides displaying hydrophobic (>90°) advancing contact angle behavior at long times (>4 days). The results indicate that REOs are in fact hydrophilic when clean and become hydrophobic due to hydrocarbon adsorption. Furthermore, this study provides insight into how REOs can be used to promote stable dropwise condensation, which is important for the development of enhanced phase change surfaces.

  18. Evidence for a disorder driven phase transition in the condensation of 4He in aerogels

    E-Print Network [OSTI]

    Fabien Bonnet; Thierry Lambert; Benjamin Cross; Laurent Guyon; Florence Despetis; Laurent Puech; Pierre-Etienne Wolf

    2008-02-21T23:59:59.000Z

    We report on thermodynamic and optical measurements of the condensation process of $^4$He in three silica aerogels of different microstructures. For the two base-catalysed aerogels, the temperature dependence of the shape of adsorption isotherms and of the morphology of the condensation process show evidence of a disorder driven transition, in agreement with recent theoretical predictions. This transition is not observed for a neutral-catalysed aerogel, which we interpret as due to a larger disorder in this case.

  19. Ammonia Process by Pressure Swing Adsorption

    SciTech Connect (OSTI)

    Dr Felix Jegede

    2010-12-27T23:59:59.000Z

    The overall objective of the project is to design, develop and demonstrate a technically feasible and commercially viable system to produce ammonia along with recovery of the products by adsorption separation methods and significantly decrease the energy requirement in ammonia production. This is achieved through a significantly more efficient ammonia psa recovery system. The new ammonia recovery system receives the reactor effluents and achieves complete ammonia recovery, (which completely eliminates the energy intensive refrigeration and condensation system currently used in ammonia production). It also recovers the unused reactants and recycles them back to the reactor, free of potential reactor contaminants, and without the need for re-compression and re-heat of recycle stream thereby further saving more energy. The result is a significantly lower energy consumption, along with capital cost savings.

  20. Advanced regenerative absorption refrigeration cycles

    DOE Patents [OSTI]

    Dao, Kim (14 Nace Ave., Piedmont, CA 94611)

    1990-01-01T23:59:59.000Z

    Multi-effect regenerative absorption cycles which provide a high coefficient of performance (COP) at relatively high input temperatures. An absorber-coupled double-effect regenerative cycle (ADR cycle) (10) is provided having a single-effect absorption cycle (SEA cycle) (11) as a topping subcycle and a single-effect regenerative absorption cycle (1R cycle) (12) as a bottoming subcycle. The SEA cycle (11) includes a boiler (13), a condenser (21), an expansion device (28), an evaporator (31), and an absorber (40), all operatively connected together. The 1R cycle (12) includes a multistage boiler (48), a multi-stage resorber (51), a multisection regenerator (49) and also uses the condenser (21), expansion device (28) and evaporator (31) of the SEA topping subcycle (11), all operatively connected together. External heat is applied to the SEA boiler (13) for operation up to about 500 degrees F., with most of the high pressure vapor going to the condenser (21) and evaporator (31) being generated by the regenerator (49). The substantially adiabatic and isothermal functioning of the SER subcycle (12) provides a high COP. For higher input temperatures of up to 700 degrees F., another SEA cycle (111) is used as a topping subcycle, with the absorber (140) of the topping subcycle being heat coupled to the boiler (13) of an ADR cycle (10). The 1R cycle (12) itself is an improvement in that all resorber stages (50b-f) have a portion of their output pumped to boiling conduits (71a-f) through the regenerator (49), which conduits are connected to and at the same pressure as the highest pressure stage (48a) of the 1R multistage boiler (48).

  1. Hybrid absorption-adsorption carbon capture | Center for Gas

    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 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGasReleaseSpeechesHallNotSeventy years ofHonorsAbout

  2. A hybrid absorption-adsorption method to efficiently capture carbon |

    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 3,625 1,006 492 742EnergyOnItem NotEnergy, science,SpeedingWu,IntelligenceYou are70 Years ofA BriefT 2 A NCenter for

  3. Electrolyte vapor condenser

    DOE Patents [OSTI]

    Sederquist, R.A.; Szydlowski, D.F.; Sawyer, R.D.

    1983-02-08T23:59:59.000Z

    A system is disclosed for removing electrolyte from a fuel cell gas stream. The gas stream containing electrolyte vapor is supercooled utilizing conventional heat exchangers and the thus supercooled gas stream is passed over high surface area passive condensers. The condensed electrolyte is then drained from the condenser and the remainder of the gas stream passed on. The system is particularly useful for electrolytes such as phosphoric acid and molten carbonate, but can be used for other electrolyte cells and simple vapor separation as well. 3 figs.

  4. Random sequential adsorption of tetramers

    E-Print Network [OSTI]

    Micha? Cie?la

    2013-06-12T23:59:59.000Z

    Adsorption of tetramer built of four identical spheres was studied numerically using the Random Sequential Adsorption (RSA) algorithm. Tetramers were adsorbed on a two dimensional, flat and homogeneous surface. Two different models of the adsorbate were investigated: a rhomboid and a square one; monomer centres were put on vertices of rhomboids and squares, respectively. Numerical simulations allow to establish the maximal random coverage ratio as well as the Available Surface Function (ASF), which is crucial for determining kinetics of the adsorption process. These results were compared with data obtained experimentally for KfrA plasmid adsorption. Additionally, the density autocorrelation function was measured.

  5. Ghost condensate busting

    SciTech Connect (OSTI)

    Bilic, Neven [Rudjer Boskovic Institute, 10002 Zagreb (Croatia)] [Rudjer Boskovic Institute, 10002 Zagreb (Croatia); Tupper, Gary B; Viollier, Raoul D, E-mail: bilic@thphys.irb.hr, E-mail: gary.tupper@uct.ac.za, E-mail: raoul.viollier@uct.ac.za [Centre of Theoretical Physics and Astrophysics, University of Cape Town, Rondebosch 7701 (South Africa)

    2008-09-15T23:59:59.000Z

    Applying the Thomas-Fermi approximation to renormalizable field theories, we construct ghost condensation models that are free of the instabilities associated with violations of the null-energy condition.

  6. Measure Guideline: Evaporative Condensers

    SciTech Connect (OSTI)

    German, A.; Dakin, B.; Hoeschele, M.

    2012-03-01T23:59:59.000Z

    The purpose of this measure guideline on evaporative condensers is to provide information on a cost-effective solution for energy and demand savings in homes with cooling loads. This is a prescriptive approach that outlines selection criteria, design and installation procedures, and operation and maintenance best practices. This document has been prepared to provide a process for properly designing, installing, and maintaining evaporative condenser systems as well as understanding the benefits, costs, and tradeoffs.

  7. Maximum likelihood estimation for cooperative sequential adsorption

    E-Print Network [OSTI]

    Burton, Geoffrey R.

    Maximum likelihood estimation for cooperative sequential adsorption Mathew D. Penrose and Vadim;Maximum likelihood estimation for cooperative sequential adsorption M.D. Penrose, Department of the region. Keywords: cooperative sequential adsorption, space-time point pro- cess, maximum likelihood

  8. Adsorption of Atoms and Molecules Physisorption

    E-Print Network [OSTI]

    Glashausser, Charles

    Adsorption of Atoms and Molecules Physisorption Chemisorption Surface Bonding Kinetics of Adsorption/Diffusion/Desorption (Scattering Dynamics) #12;Outcomes of Collision Process Rebound (elastically or inelastically) Elastic Scattering Inelastic Scattering Accomodation (thermalizing) Adsorption E V(r) r

  9. Adsorptive Stripping Voltammetric Measurements of Trace Uranium...

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

    Adsorptive Stripping Voltammetric Measurements of Trace Uranium at the Bismuth Film Electrode. Adsorptive Stripping Voltammetric Measurements of Trace Uranium at the Bismuth Film...

  10. NO Adsorption and Dissociation on Rh(111): PM-IRAS Study W. T. Wallace, Y. Cai, M. S. Chen, and D. W. Goodman*

    E-Print Network [OSTI]

    Goodman, Wayne

    -modulation infrared reflection absorption spectroscopy to study the adsorption/ dissociation of NO on Rh(111). While that the N atoms may diffuse into the near-surface metal region. The latter conclusion followed because

  11. Steam condensate leakage

    SciTech Connect (OSTI)

    Midlock, E.B.; Thuot, J.R.

    1996-07-01T23:59:59.000Z

    Argonne National Laboratory (ANL) is a multi-program research and development center owned by the United States Department of Energy and operated by the University of Chicago. The majority of the buildings on site use steam for heating and other purposes. Steam is generated from liquid water at the site`s central boiler house and distributed around the site by means of large pipes both above and below the ground. Steam comes into each building where it is converted to liquid condensate, giving off heat which can be used by the building. The condensate is then pumped back to the boiler house where it will be reheated to steam again. The process is continual but is not perfectly efficient. A substantial amount of condensate is being lost somewhere on site. The lost condensate has both economic and environmental significance. To compensate for lost condensate, makeup water must be added to the returned condensate at the boiler house. The water cost itself will become significant in the future when ANL begins purchasing Lake Michigan water. In addition to the water cost, there is also the cost of chemically treating the water to remove impurities, and there is the cost of energy required to heat the water, as it enters the boiler house 1000 F colder than the condensate return. It has been estimated that only approximately 60% of ANL`s steam is being returned as condensate, thus 40% is being wasted. This is quite costly to ANL and will become significantly more costly in the future when ANL begins purchasing water from Lake Michigan. This study locates where condensate loss is occurring and shows how much money would be saved by repairing the areas of loss. Shortly after completion of the study, one of the major areas of loss was repaired. This paper discusses the basis for the study, the areas where losses are occurring, the potential savings of repairing the losses, and a hypothesis as to where the unaccounted for loss is occurring.

  12. Galaxies as condensates

    E-Print Network [OSTI]

    D. V. Bugg

    2012-12-21T23:59:59.000Z

    A novel interpretation of MOND is presented. For galactic data, in addition to Newtonian acceleration, there is an attractive acceleration peaking at Milgrom's parameter a_0. The peak lies within experimental error where a_0 = cH_0/2\\pi and H_0 is the present-time value of the Hubble constant. This peaking may be understood in terms of quantum mechanical mixing between Newtonian gravitation and the condensation mechanism. There are five pointers towards galaxies being Fermi-Dirac condensates.

  13. High temperature adsorption measurements

    SciTech Connect (OSTI)

    Bertani, R.; Parisi, L.; Perini, R.; Tarquini, B.

    1996-01-24T23:59:59.000Z

    Adsorption phenomena are a rich and rather new field of study in geothermal research, in particular at very high temperature. ENEL is interested in the exploitation of geothermal regions with superheated steam, and it is important to understand the behavior of water-rock interaction. We have analyzed in the 170-200 °C temperature range four samples of Monteverdi cuttings; the next experimental effort will be at 220 °C and over in 1996. The first results of the 1995 runs are collected in this paper. We can highlight four main items: 1. At relative pressures over 0.6 the capillarity forces are very important. 2. There is no significant temperature effect. 3. Adsorbed water can be present, and it is able to multiply by a factor of 15 the estimated reserve of super-heated steam only. 4. Pores smaller than 15 Å do not contribute to the adsorbed mass.

  14. Radiation from condensed surface of magnetic neutron stars

    E-Print Network [OSTI]

    Matthew van Adelsberg; Dong Lai; Alexander Y. Potekhin; Phil Arras

    2005-05-04T23:59:59.000Z

    Recent observations show that the thermal X-ray spectra of many isolated neutron stars are featureless and in some cases (e.g., RX J1856.5-3754) well fit by a blackbody. Such a perfect blackbody spectrum is puzzling since radiative transport through typical neutron star atmospheres causes noticeable deviation from blackbody. Previous studies have shown that in a strong magnetic field, the outermost layer of the neutron star may be in a condensed solid or liquid form because of the greatly enhanced cohesive energy of the condensed matter. The critical temperature of condensation increases with the magnetic field strength, and can be as high as 10^6 K (for Fe surface at B \\sim 10^{13} G or H surface at B \\sim a few times 10^{14} G). Thus the thermal radiation can directly emerge from the degenerate metallic condensed surface, without going through a gaseous atmosphere. Here we calculate the emission properties (spectrum and polarization) of the condensed Fe and H surfaces of magnetic neutron stars in the regimes where such condensation may be possible. For a smooth condensed surface, the overall emission is reduced from the blackbody by less than a factor of 2. The spectrum exhibits modest deviation from blackbody across a wide energy range, and shows mild absorption features associated with the ion cyclotron frequency and the electron plasma frequency in the condensed matter. The roughness of the solid condensate (in the Fe case) tends to decrease the reflectivity of the surface, and make the emission spectrum even closer to blackbody. We discuss the implications of our results for observations of dim, isolated neutron stars and magnetars.

  15. Rfrigration solaire adsorption solide : choix du meilleur couple d'adsorption

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1005 Réfrigération solaire à adsorption solide : choix du meilleur couple d'adsorption A. Adell solaires à adsorption solide, en fonction des caractéristiques physico-chimiques du couple d'adsorption et formula of solid adsorption solar refrigerators C.O.P., has been given in function of physical

  16. Strategies in Optimizing Condensate Return

    E-Print Network [OSTI]

    Bloom, D.

    Optimizing condensate return for reuse as boiler feedwater is often a viable means of reducing fuel costs and improving boiler system efficiency. As more condensate is returned, less makeup is required and savings on water and water treatment costs...

  17. The Color Glass Condensate

    E-Print Network [OSTI]

    F. Gelis; E. Iancu; J. Jalilian-Marian; R. Venugopalan

    2010-02-01T23:59:59.000Z

    We provide a broad overview of the theoretical status and phenomenological applications of the Color Glass Condensate effective field theory describing universal properties of saturated gluons in hadron wavefunctions that are extracted from deeply inelastic scattering and hadron-hadron collision experiments at high energies.

  18. Condensate removal device

    DOE Patents [OSTI]

    Maddox, James W. (Newport News, VA); Berger, David D. (Alexandria, VA)

    1984-01-01T23:59:59.000Z

    A condensate removal device is disclosed which incorporates a strainer in unit with an orifice. The strainer is cylindrical with its longitudinal axis transverse to that of the vapor conduit in which it is mounted. The orifice is positioned inside the strainer proximate the end which is remoter from the vapor conduit.

  19. Sidestream condensate polishing for PWRs

    SciTech Connect (OSTI)

    Shor, S.W.W.; Yim, S.L.; Rios, J.; Liu, J.

    1986-06-01T23:59:59.000Z

    Condensate polishers are used in power plant condensate system to remove both particulate matter and ionized corrodents. Their conventional location is just downstream of the hotwell pumps (condensate pumps). Most polisher installations have enough flow capacity to polish 100% of the condensate. This inline configuration has some disadvantage, including a flow that varies with unit load and tends to disturb the polisher beds and reduce their effectiveness, and a potential for interrupting flow to the feedwater pumps. An alternate arrangement where water is extracted from either the condenser or the condensate system, polished and returned to the system, has been used in a few plants. Three different ways of doing this have been used: divide the condenser hotwell into two parts, one of which receives condensate from the tube bundles and the other of which is sheltered. Take unpolished condensate from the first part, purify it and return it to the other part from which the condensate pumps take suction; take unpolished condensate from one end of a divided header on the suction side of the hotwell pumps and after polishing it return it to the other end; and take unpolished condensate from a header on the discharge side of the condensate pumps, purify it and return it to the condensate system a short distance downstream. The three variants are analyzed in this report. It is concluded that the variant where the connections are on the discharge side of the condensate pumps is the most desirable for retrofitting, in all cases being far easier to retrofit than an inline polisher. In many cases it will be most desirable for new construction.

  20. Oral Drug Absorption

    E-Print Network [OSTI]

    Yamashita, Shinji

    2006-10-26T23:59:59.000Z

    properties ? membrane permeability ? metabolic stability ? enzyme inhibition or induction ? protein binding ? transporter affinity ?. Chemical Optimization DDS technology 4 Strategy of Drug Delivery Absorption Distribution Metabolism Excretion Improve of drug... absorption absorption enhancement controlled releasecontrolled release new administration route Drug targeting to the tissue to the cell to the organelle Dr. Shinji Yamashita (Setsunan University) Issue: Oral Drug Absorption Dr. Valentino J. Stella...

  1. Atomic and Molecular Adsorption on Re(0001). | EMSL

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

    Molecular Adsorption on Re(0001). Atomic and Molecular Adsorption on Re(0001). Abstract: Using periodic, self-consistent density functional theory calculations, the adsorption of...

  2. A Density Functional Theory Study of Formaldehyde Adsorption...

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

    Density Functional Theory Study of Formaldehyde Adsorption on Ceria. A Density Functional Theory Study of Formaldehyde Adsorption on Ceria. Abstract: Molecular adsorption of...

  3. E-Print Network 3.0 - adsorption thermal adsorption Sample Search...

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

    of environmentally friendly heat pump: a new adsorption system for hybrid and electric vehicles Summary: 1 Development of environmentally friendly heat pump: a new adsorption...

  4. Asymmetric condensed dark matter

    E-Print Network [OSTI]

    Aguirre, Anthony

    2015-01-01T23:59:59.000Z

    We explore the viability of a boson dark matter candidate with an asymmetry between the number densities of particles and antiparticles. A simple thermal field theory analysis confirms that, under certain general conditions, this component would develop a Bose-Einstein condensate in the early universe that, for appropriate model parameters, could survive the ensuing cosmological evolution until now. The condensation of a dark matter component in equilibrium with the thermal plasma is a relativistic process, hence the amount of matter dictated by the charge asymmetry is complemented by a hot relic density frozen out at the time of decoupling. Contrary to the case of ordinary WIMPs, dark matter particles in a condensate can be very light, $10^{-22}\\,{\\rm eV} \\lesssim m \\lesssim 10^2\\,{\\rm eV}$; the lower limit arises from constraints on small-scale structure formation, while the upper bound ensures that the density from thermal relics is not too large. Big-Bang nucleosynthesis constrains the temperature of deco...

  5. Evidence for a disorder induced phase transition in the condensation of 4He in aerogels

    E-Print Network [OSTI]

    Thierry Lambert; Florence Despetis; Laurent Puech; Pierre-Etienne Wolf

    2006-12-27T23:59:59.000Z

    We report on thermodynamic and optical measurements of the condensation process of $^4$He in two silica aerogels of same porosity 95%, but different microstructures resulting from different pH during synthesis. For a base-catalyzed aerogel, the temperature dependence of the shape of adsorption isotherms and of the morphology of the condensation process show evidence of a disorder induced transition,in agreement with recent theoretical predictions. This transition is not observed for a neutral-catalyzed aerogel, which we interpret as due to a larger disorder in this case.

  6. Experimental Investigation of the Effect Of Zeolite Coating Thickness on the Performance of a Novel Zeolite-Water Adsorption Heat Pump Module

    E-Print Network [OSTI]

    Dawoud, B.; Hofle, P.; Chmielewski, S.

    2010-01-01T23:59:59.000Z

    A novel zeolite-water absorption heat pump module comprising an adsorber, an evaporator and a condenser heat exchanger as well as a module non-return valve in a hermetically sealed vessel is introduced. The investigated adsorber heat exchanger...

  7. Methane adsorption on Devonian shales 

    E-Print Network [OSTI]

    Li, Fan-Chang

    1992-01-01T23:59:59.000Z

    METHANE ADSORPTION ON DEVONIAN SHALES A Thesis by FAN-CHANG LI Submitted to thc Office of Graclua4e Sturiics of texas AgiM Ulllvel'sliy in pari, ial fulfilhuent of t, hc requirements I'or t, hc degree of ii IAS'I'Elf OF SCIL'NCE December... 1992 Major Subject, : Chemical Engineering METHANE ADSORPTION ON DEVONIAN SHALES A Thesis l&y I'AN-CHANC LI Approved as to style and contcut by: A. T. 'vtratson (Chair of Commitl. ee) John C. Slattery (Member) Bruce . Hcrhcrt (Memhcr...

  8. Adsorption of polymers at nanowires

    E-Print Network [OSTI]

    Thomas Vogel; Michael Bachmann

    2011-03-09T23:59:59.000Z

    Low-energy structures of a hybrid system consisting of a polymer and an attractive nanowire substrate as well as the thermodynamics of the adsorption transition are studied by means of Monte Carlo computer simulations. Depending on structural and energetic properties of the substrate, we find different adsorbed polymer conformations, amongst which are spherical droplets attached to the wire and monolayer tubes surrounding it. We identify adsorption temperatures and the type of the transition between adsorbed and desorbed structures depending on the substrate attraction strength.

  9. Methane adsorption on Devonian shales

    E-Print Network [OSTI]

    Li, Fan-Chang

    1992-01-01T23:59:59.000Z

    METHANE ADSORPTION ON DEVONIAN SHALES A Thesis by FAN-CHANG LI Submitted to thc Office of Graclua4e Sturiics of texas AgiM Ulllvel'sliy in pari, ial fulfilhuent of t, hc requirements I'or t, hc degree of ii IAS'I'Elf OF SCIL'NCE December... 1992 Major Subject, : Chemical Engineering METHANE ADSORPTION ON DEVONIAN SHALES A Thesis l&y I'AN-CHANC LI Approved as to style and contcut by: A. T. 'vtratson (Chair of Commitl. ee) John C. Slattery (Member) Bruce . Hcrhcrt (Memhcr...

  10. Confinement Contains Condensates

    SciTech Connect (OSTI)

    Brodsky, Stanley J.; Roberts, Craig D.; Shrock, Robert; Tandy, Peter C.

    2012-03-12T23:59:59.000Z

    Dynamical chiral symmetry breaking and its connection to the generation of hadron masses has historically been viewed as a vacuum phenomenon. We argue that confinement makes such a position untenable. If quark-hadron duality is a reality in QCD, then condensates, those quantities that have commonly been viewed as constant empirical mass-scales that fill all spacetime, are instead wholly contained within hadrons; i.e., they are a property of hadrons themselves and expressed, e.g., in their Bethe-Salpeter or light-front wave functions. We explain that this paradigm is consistent with empirical evidence, and incidentally expose misconceptions in a recent Comment.

  11. Lease Condensate Production

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (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 3400, U.S.MajorMarketsNov-14 Dec-14Has|IssuesCondensate

  12. Color Glass Condensate and Glasma

    E-Print Network [OSTI]

    Francois Gelis

    2010-09-06T23:59:59.000Z

    In this talk, I review the Color Glass Condensate theory of gluon saturation, and its application to the early stages of heavy ion collisions.

  13. Adsorption of Cu21 Ions with Poly

    E-Print Network [OSTI]

    Adsorption of Cu21 Ions with Poly (N-isopropylacrylamide-co-methacrylic acid) Micro. It was shown that particle size played a very important role in the adsorption process. The nano-scale particles showed much improved Cu ion adsorption efficiency, compared with the micro hydro- gels. The amount

  14. Dissociative Adsorption: A Solvable Model Vladimir Privman

    E-Print Network [OSTI]

    Dissociative Adsorption: A Solvable Model Vladimir Privman Department of Physics, Clarkson and adsorption processes reviewed, e.g., in [3­6]. In this work, we introduce a model with infinite dissociation to the gap ends do not impede exact solvability has also been noted in random sequential adsorption

  15. 1. Introduction to Expanded Bed Adsorption

    E-Print Network [OSTI]

    Lebendiker, Mario

    1. Introduction to Expanded Bed Adsorption This handbook introduces the principles of Expanded Bed Adsorption and serves as a practical guide to the use of STREAMLINE adsorbents and columns available from Adsorption. The majority of biotechnology processes for producing pharmaceutical or diagnostic products

  16. ADSORPTION OF SEMIFLEXIBLE POLYMERS ON HOMOGENEOUS SURFACES

    E-Print Network [OSTI]

    Oro, Daniel

    ADSORPTION OF SEMIFLEXIBLE POLYMERS ON HOMOGENEOUS SURFACES K. Sumithra F G Theoretische Physik the problem of adsorption of a single semiflexible polymer chain on to a planar, homogeneous surface using off-lattice Monte Carlosimulations. Adsorption characteristics were studied at different temperatures for chains

  17. 2, 431468, 2002 Adsorption of NOy

    E-Print Network [OSTI]

    Boyer, Edmond

    ACPD 2, 431­468, 2002 Adsorption of NOy on ice T. Bartels et al. Title Page Abstract Introduction Geophysical Society 2002 Atmospheric Chemistry and Physics Discussions The adsorption of nitrogen oxides (markus.ammann@psi.ch) 431 #12;ACPD 2, 431­468, 2002 Adsorption of NOy on ice T. Bartels et al. Title Page

  18. Geothermal Reservoir Evaluation Considering Fluid Adsorption

    E-Print Network [OSTI]

    Stanford University

    SGP-"R- 68 Geothermal Reservoir Evaluation Considering Fluid Adsorption and Composition Michael J, California #12;GEOTHERMAL RESERVOIR EVALUATION CONSIDERING FLUID ADSORPTION AND COMPOSITION A DISSERTATIONFtion phenomena is described. Then, t h e implications of adsorption on material balance calculations and on vel1

  19. A LABORATORY INVESTIGATION OF STEAM ADSORPTION

    E-Print Network [OSTI]

    Stanford University

    A LABORATORY INVESTIGATION OF STEAM ADSORPTION IN GEOTHERMAL RESERVOIR ROCKS OF STANFORD UNIVERSITY of Tables List of Figures 1.0 INTRODUCTION 1.1 The Adsorption Phenomenon 1.2 Vapor Dominated Geothermal.1 Background 3.1.I The Kelvin Equation 3.1.2 Langmuir-BET Type Equations 3.2 Adsorption Calculations 3

  20. Molecular Dynamics Simulations of Uranyl and Uranyl Carbonate Adsorption at Alumino-silicate Surfaces

    SciTech Connect (OSTI)

    Kerisit, Sebastien N.; Liu, Chongxuan

    2014-03-03T23:59:59.000Z

    Adsorption at mineral surfaces is a critical factor controlling the mobility of uranium(VI) in aqueous environments. Therefore, molecular dynamics (MD) simulations were performed to investigate uranyl(VI) adsorption onto two neutral alumino-silicate surfaces, namely the orthoclase (001) surface and the octahedral aluminum sheet of the kaolinite (001) surface. Although uranyl preferentially adsorbed as a bi-dentate innersphere complex on both surfaces, the free energy of adsorption at the orthoclase surface (-15 kcal mol-1) was significantly more favorable than that at the kaolinite surface (-3 kcal mol-1), which was attributed to differences in surface functional groups and to the ability of the orthoclase surface to dissolve a surface potassium ion upon uranyl adsorption. The structures of the adsorbed complexes compared favorably with X-ray absorption spectroscopy results. Simulations of the adsorption of uranyl complexes with up to three carbonate ligands revealed that uranyl complexes coordinated to up to 2 carbonate ions are stable on the orthoclase surface whereas uranyl carbonate surface complexes are unfavored at the kaolinite surface. Combining the MD-derived equilibrium adsorption constants for orthoclase with aqueous equilibrium constants for uranyl carbonate species indicates the presence of adsorbed uranium complexes with one or two carbonates in alkaline conditions, in support of current uranium(VI) surface complexation models.

  1. Condenser for photolithography system

    DOE Patents [OSTI]

    Sweatt, William C.

    2004-03-02T23:59:59.000Z

    A condenser for a photolithography system, in which a mask image from a mask is projected onto a wafer through a camera having an entrance pupil, includes a source of propagating radiation, a first mirror illuminated by the radiation, a mirror array illuminated by the radiation reflected from said first mirror, and a second mirror illuminated by the radiation reflected from the array. The mirror array includes a plurality of micromirrors. Each of the micromirrors is selectively actuatable independently of each other. The first mirror and the second mirror are disposed such that the source is imaged onto a plane of the mask and the mirror array is imaged into the entrance pupil of the camera.

  2. Laser Driven Dynamic Loading of Condensed Matter

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

    Laser Driven Dynamic Loading of Condensed Matter Laser Driven Dynamic Loading of Condensed Matter Advanced diagnostics of experiments covering many orders of magnitude in strain...

  3. Condensation on Superhydrophobic Copper Oxide Nanostructures

    E-Print Network [OSTI]

    Enright, Ryan

    Condensation is an important process in both emerging and traditional power generation and water desalination technologies. Superhydrophobic nanostructures promise enhanced condensation heat transfer by reducing the ...

  4. Condensation on superhydrophobic copper oxide nanostructures

    E-Print Network [OSTI]

    Dou, Nicholas (Nicholas Gang)

    2012-01-01T23:59:59.000Z

    Condensation is an important process in many power generation and water desalination technologies. Superhydrophobic nanostructured surfaces have unique condensation properties that may enhance heat transfer through a ...

  5. Surface texture and specific adsorption sites of sol-gel synthesized anatase TiO{sub 2} nanoparticles

    SciTech Connect (OSTI)

    Zaki, Mohamed I., E-mail: mizaki@link.net [Chemistry Department, Faculty of Science, Minia University, El-Minia, 61519 (Egypt); Mekhemer, Gamal A.H.; Fouad, Nasr E. [Chemistry Department, Faculty of Science, Minia University, El-Minia, 61519 (Egypt)] [Chemistry Department, Faculty of Science, Minia University, El-Minia, 61519 (Egypt); Jagadale, Tushar C. [Physical and Materials Chemistry Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411008 (India)] [Physical and Materials Chemistry Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411008 (India); Ogale, Satishchandra B., E-mail: sb.ogale@ncl.res.in [Physical and Materials Chemistry Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411008 (India)

    2010-10-15T23:59:59.000Z

    The surface properties of sol-gel synthesized anatase titania (TiO{sub 2}) nanoparticles are probed by sorptiometry, infrared absorption spectroscopy, UV-vis diffuse reflectance spectroscopy and high resolution transmission electron microscopy. The results reveal strong correlations of the surface area, porosity, pyridine adsorption capacity and strength, and catalytic methylbutynol decomposition activity.

  6. Dynamic Absorption Model for Off-Gas Separation

    SciTech Connect (OSTI)

    Veronica J. Rutledge

    2011-07-01T23:59:59.000Z

    Modeling and simulations will aid in the future design of U.S. advanced reprocessing plants for the recovery and recycle of actinides in used nuclear fuel. The specific fuel cycle separation process discussed in this report is the off-gas treatment system. The off-gas separation consists of a series of scrubbers and adsorption beds to capture constituents of interest. Dynamic models are being developed to simulate each unit operation involved so each unit operation can be used as a stand-alone model and in series with multiple others. Currently, a rate based, dynamic absorption model is being developed in gPROMS software. Inputs include liquid and gas stream constituents, column properties, liquid and gas phase reactions, number of stages, and inlet conditions. It simulates multiple component absorption with countercurrent flow and accounts for absorption by mass transfer and chemical reaction. The assumption of each stage being a discrete well-mixed entity was made. Therefore, the model is solved stagewise. The simulation outputs component concentrations in both phases as a function of time from which the rate of absorption is determined. Temperature of both phases is output as a function of time also. The model will be used able to be used as a standalone model in addition to in series with other off-gas separation unit operations. The current model is being generated based on NOx absorption; however, a future goal is to develop a CO2 specific model. The model will have the capability to be modified for additional absorption systems. The off-gas models, both adsorption and absorption, will be made available via the server or web for evaluation by customers.

  7. Fluxes, Gaugings and Gaugino Condensates

    E-Print Network [OSTI]

    J. -P. Derendinger; C. Kounnas; P. M. Petropoulos

    2006-02-10T23:59:59.000Z

    Based on the correspondence between the N = 1 superstring compactifications with fluxes and the N = 4 gauged supergravities, we study effective N = 1 four-dimensional supergravity potentials arising from fluxes and gaugino condensates in the framework of orbifold limits of (generalized) Calabi-Yau compactifications. We give examples in heterotic and type II orientifolds in which combined fluxes and condensates lead to vacua with small supersymmetry breaking scale. We clarify the respective roles of fluxes and condensates in supersymmetry breaking, and analyze the scaling properties of the gravitino mass.

  8. Multi-Phase Galaxy Formation and Quasar Absorption Systems

    E-Print Network [OSTI]

    Ariyeh H. Maller

    2005-05-06T23:59:59.000Z

    The central problem of galaxy formation is understanding the cooling and condensation of gas in dark matter halos. It is now clear that to match observations this requires further physics than the simple assumptions of single phase gas cooling. A model of multi-phase cooling (Maller & Bullock 2004) can successfully account for the upper cutoff in the masses of galaxies and provides a natural explanation of many types of absorption systems (Mo & Miralda-Escude 1996). Absorption systems are our best probes of the gaseous content of galaxy halos and therefore provide important constraints on models for gas cooling into galaxies. All physical processes that effect gas cooling redistribute gas and therefore are detectable in absorption systems. Detailed studies of the nature of gas in galaxy halos using absorption systems are crucial for building a correct theory of galaxy formation.

  9. Method and means for dynamic measurement of rates of adsorption from solutions

    DOE Patents [OSTI]

    Slomka, B.J.; Buttermore, W.H.

    1992-05-05T23:59:59.000Z

    A method and apparatus are described for the dynamic measurement of rates of absorption from solutions. The method has the advantage of avoiding the use of solvent normally used to establish a baseline. The method involves pre-evacuating the adsorbent contained in an adsorbent cell and thereafter rapidly contacting the adsorbent with analytical solution, all without prior exposure of adsorbent to pure solvent. The result is a sharp characteristic adsorption line. 5 figs.

  10. Method and means for dynamic measurement of rates of adsorption from solutions

    DOE Patents [OSTI]

    Slomka, Bogdan J. (Ames, IA); Buttermore, William H. (Ames, IA)

    1992-05-05T23:59:59.000Z

    A method and apparatus for dynamic measurement of rates of absorption from solutions. The method has the advantage of avoiding the use of solvent normally used to establish a baseline. The method involves pre-evacuating the adsorbent contained in an adsorbent cell and thereafter rapidly contacting the adsorbent with analytical solution, all without prior exposure of adsorbent to pure solvent. The result is a sharp characteristic adsorption line.

  11. Experimental studies of Bose-Einstein condensation

    E-Print Network [OSTI]

    Hart, Gus

    of the condensate, and of its coherence properties. Ó1998 Optical Society of America OCIS codes: (020.0020) Atomic-Einstein Condensation of Lithium: Observation of Limited Condensate Number", Phys. Rev. Lett. 78, 985 (1997). 4. K. Ketterle, "Bose-Einstein condensation of a weakly-interacting gas", in Ultracold Atoms and Bose

  12. Condensate System Troubleshooting and Optimization

    E-Print Network [OSTI]

    Jenkins, B. V.

    1983-01-01T23:59:59.000Z

    fuel is needed to convert it back to steam because 148 BTU's are in each pound of l80 0 F condensate. And finally, because it is water that the plant has already treated, (ion exchange processed, scale/corrosion treated, oxygen removed... heat transfer surfaces). The results of carbon dioxide corrosion include: expensive replacement of condensate piping reduced boiler tube life and, in cases, unexpected boiler shutdown and production losses. The net result is an economic Jutlay...

  13. Oil removal from water via adsorption

    E-Print Network [OSTI]

    Jacobs, William Edward

    1973-01-01T23:59:59.000Z

    . Inorganic adsorbents, such as perlite and glass wool, do not have high oil adsorption capacities compared to organ- ics and the capacities are dependent on the viscosity of the oils. The inorganic adsorbents have higher oil adsorption capacities in more... IV Table V Table VI Significant Facts about Major Oil Spills Viscosity of Test Oils Determined by Capillary Viscometer Percent of Oil Remaining in Water After Removal of Oil-Carrier Combination Maximum Oil Adsorption Capacity for Light Crude...

  14. Hydrogen Adsorption Induces Interlayer Carbon Bond Formation...

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

    Hydrogen Adsorption Induces Interlayer Carbon Bond Formation in Supported Few-Layer Graphene Friday, February 28, 2014 Among the allotropes of carbon, diamond has some of the most...

  15. adsorption: Topics by E-print Network

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

    (more) Beckner, Matt 2012-01-01 105 Adsorption of trace steroid estrogens to hydrophobic hollow fibre membranes Edinburgh, University of - Research Archive Summary: This paper...

  16. Adsorption of water vapor on reservoir rocks

    SciTech Connect (OSTI)

    Not Available

    1993-07-01T23:59:59.000Z

    Progress is reported on: adsorption of water vapor on reservoir rocks; theoretical investigation of adsorption; estimation of adsorption parameters from transient experiments; transient adsorption experiment -- salinity and noncondensible gas effects; the physics of injection of water into, transport and storage of fluids within, and production of vapor from geothermal reservoirs; injection optimization at the Geysers Geothermal Field; a model to test multiwell data interpretation for heterogeneous reservoirs; earth tide effects on downhole pressure measurements; and a finite-difference model for free surface gravity drainage well test analysis.

  17. Adsorption of unsaturated hydrocarbons on zeolites: the eects of the zeolite framework on adsorption

    E-Print Network [OSTI]

    Truong, Thanh N.

    Adsorption of unsaturated hydrocarbons on zeolites: the eects of the zeolite framework on adsorption properties of ethylene Jumras Limtrakul a,*, Tanin Nanok a , Siriporn Jungsuttiwong a , Pipat 2001; in ®nal form 13 July 2001 Abstract The adsorption properties of ethylene on H-Faujasite (H

  18. Surface pre-coating of talc particles by carboxyl methyl cellulose adsorption : study of adsorption

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Surface pre-coating of talc particles by carboxyl methyl cellulose adsorption : study of adsorption and consequences on surface properties and settling rate P. Bacchin1 , J-P. Bonino2 , F. Martin3 This paper investigates the adsorption of different sized carboxyl methyl cellulose (CMC) onto talc particles

  19. Oxide-Dependent Adsorption of a Model Membrane Phospholipid, Dipalmitoylphosphatidylcholine: Bulk Adsorption Isotherms

    E-Print Network [OSTI]

    Sahai, Nita

    Oxide-Dependent Adsorption of a Model Membrane Phospholipid, Dipalmitoylphosphatidylcholine: Bulk Adsorption Isotherms Timothy A. Oleson*, and Nita Sahai,,§ Department of Geology & Geophysics, 1215 West the substrate-dependence of phospholipid adsorption with an emphasis on oxide surface chemistry and to determine

  20. Adsorption of UCG organics by coal, char, activated char and ash

    SciTech Connect (OSTI)

    Humenick, M.J.; Morgan, J.R.; Nolan, B.T.

    1987-01-01T23:59:59.000Z

    The aqueous adsorption of Underground Coal Gasification (UCG) organics generated during gas production was tested in the laboratory to determine the organic's affinity for surroundings in the region of the burn cavity. Coal from the Rosebud coal mine in Hanna, Wyoming along with char, activated char, and ash were studied during this work. Contaminated ground water was simulated by preparing a solution of Hanna IVB condensate in Hanna ground water. Adsorption isotherm studies and leaching tests were performed at 5 and 22/sup 0/C. Leaching tests using tap water showed that only the char could release organic material to water. The adsorption tests showed that all four types of media could adsorb organics from solution. Measures of organic materials in water included Total Organic Carbon (TOC), phenol, o-cresol, and p+m cresol. The experiments indicated that activated char was the most effective adsorbent, while the others were about equal in effectiveness. Adsorption behavior could be modeled in many instances by the equations of Langmuir and Freundlich. However, not all data taken followed these models.

  1. Hydrogen adsorption on Ru(001) studied by Scanning Tunneling Microscopy

    E-Print Network [OSTI]

    Tatarkhanov, Mous; Rose, Franck; Fomin, Evgeny; Ogletree, D. Frank; Salmeron, Miquel

    2008-01-01T23:59:59.000Z

    001) and first hydrogen adsorption structure with (?3×?3)R30Hydrogen adsorption on Ru(001) studied by Scanning TunnelingCA 94720 Keywords: STM, Adsorption, Dissociation; Hydrogen,

  2. Adsorption of Polypropylene and Polyethylene on Liquid Chromatographic

    E-Print Network [OSTI]

    Li, Jing

    Adsorption of Polypropylene and Polyethylene on Liquid Chromatographic Column Packings T. Macko1 tested as column packings for adsorption of isotactic polypropylene and linear polyethylene from dilute sorbent - mobile phase, where adsorption of polypropylene was observed. Keywords Column liquid

  3. Adsorption of Carbon, Silicon, and Germanium Adatoms on Graphene Sheet

    E-Print Network [OSTI]

    Cahyadi, Erica

    2012-01-01T23:59:59.000Z

    of the IVA group atoms adsorption on graphene. J. Appl.surface. We observe that adsorption energy of carbon onsurface coverage. The adsorption energy tapers at 3x3 cell.

  4. ADSORPTION PHENOMENA AND MACROSCOPIC PROPERTIES OF FERRONEMATICS CAUSED BY

    E-Print Network [OSTI]

    Sluckin, Tim

    ADSORPTION PHENOMENA AND MACROSCOPIC PROPERTIES OF FERRONEMATICS CAUSED BY ORIENTATIONAL the effect of adsorption and desorption of rod-like magnetic grains on the macroscopic properties and the nematic orientational texture. In the presence of ferroparticle adsorption, the segregation effect

  5. Lithium adsorption on armchair graphene nanoribbons Dana Krepel, Oded Hod

    E-Print Network [OSTI]

    Hod, Oded

    Lithium adsorption on armchair graphene nanoribbons Dana Krepel, Oded Hod School of Chemistry e i n f o Available online 7 December 2010 Keywords: Density functional theory Lithium Graphene Armchair graphene nanoribbon Chemical adsorption Lithium adsorption on two dimensional graphene

  6. Nuclear Alpha-Particle Condensates

    E-Print Network [OSTI]

    T. Yamada; Y. Funaki; H. Horiuchi; G. Roepke; P. Schuck; A. Tohsaki

    2011-03-21T23:59:59.000Z

    The $\\alpha$-particle condensate in nuclei is a novel state described by a product state of $\\alpha$'s, all with their c.o.m. in the lowest 0S orbit. We demonstrate that a typical $\\alpha$-particle condensate is the Hoyle state ($E_{x}=7.65$ MeV, $0^+_2$ state in $^{12}$C), which plays a crucial role for the synthesis of $^{12}$C in the universe. The influence of antisymmentrization in the Hoyle state on the bosonic character of the $\\alpha$ particle is discussed in detail. It is shown to be weak. The bosonic aspects in the Hoyle state, therefore, are predominant. It is conjectured that $\\alpha$-particle condensate states also exist in heavier $n\\alpha$ nuclei, like $^{16}$O, $^{20}$Ne, etc. For instance the $0^+_6$ state of $^{16}$O at $E_{x}=15.1$ MeV is identified from a theoretical analysis as being a strong candidate of a $4\\alpha$ condensate. The calculated small width (34 keV) of $0^+_6$, consistent with data, lends credit to the existence of heavier Hoyle-analogue states. In non-self-conjugated nuclei such as $^{11}$B and $^{13}$C, we discuss candidates for the product states of clusters, composed of $\\alpha$'s, triton's, and neutrons etc. The relationship of $\\alpha$-particle condensation in finite nuclei to quartetting in symmetric nuclear matter is investigated with the help of an in-medium modified four-nucleon equation. A nonlinear order parameter equation for quartet condensation is derived and solved for $\\alpha$ particle condensation in infinite nuclear matter. The strong qualitative difference with the pairing case is pointed out.

  7. Diffusion and Adsorption of Uranyl Carbonate Species in Nanosized...

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

    and Adsorption of Uranyl Carbonate Species in Nanosized Mineral Fractures. Diffusion and Adsorption of Uranyl Carbonate Species in Nanosized Mineral Fractures. Abstract: Atomistic...

  8. NO Adsorption on Ultrathin O Films: Formation of Nitrite and...

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

    Adsorption on Ultrathin O Films: Formation of Nitrite and Nitrate Species. NO Adsorption on Ultrathin O Films: Formation of Nitrite and Nitrate Species. Abstract: Interaction of...

  9. Comment on Tunable generation and adsorption of energetic compounds...

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

    Tunable generation and adsorption of energetic compounds in the vapor phase at trace levels: A tool for testing and Comment on Tunable generation and adsorption of energetic...

  10. Amorphous Molecular Organic Solids for Gas Adsorption. | EMSL

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

    Molecular Organic Solids for Gas Adsorption. Amorphous Molecular Organic Solids for Gas Adsorption. Abstract: We show that molecular organic compounds with large accessible...

  11. A Simple, Accurate Model for Alkyl Adsorption on Late Transition...

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

    Simple, Accurate Model for Alkyl Adsorption on Late Transition Metals. A Simple, Accurate Model for Alkyl Adsorption on Late Transition Metals. Abstract: A simple model that...

  12. adsorptive protactinium separation: Topics by E-print Network

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

    film, and exhibit ultralow protein adsorption and cell attachment with the coating. This "stealth" or "non 435 Lipid Demixing and Protein-Protein Interactions in the Adsorption of...

  13. Water and Carbon Dioxide Adsorption at Olivine Surfaces. | EMSL

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

    and Carbon Dioxide Adsorption at Olivine Surfaces. Water and Carbon Dioxide Adsorption at Olivine Surfaces. Abstract: Plane-wave density functional theory (DFT) calculations were...

  14. Transition metals on the (0001) surface of graphite: Fundamental aspects of adsorption, diffusion, and morphology

    SciTech Connect (OSTI)

    Appy, David [Ames Laboratory; Lei, Huaping [Ames Laboratory; Wang, Cai-Zhuang [Ames Laboratory; Tringides, Michael C [Ames Laboratory; Liu, Da-Jiang [Ames Laboratory; Evans, James W [Ames Laboratory; Thiel, Patricia A [Ames Laboratory

    2014-08-01T23:59:59.000Z

    In this article, we review basic information about the interaction of transition metal atoms with the (0 0 0 1) surface of graphite, especially fundamental phenomena related to growth. Those phenomena involve adatom-surface bonding, diffusion, morphology of metal clusters, interactions with steps and sputter-induced defects, condensation, and desorption. General traits emerge which have not been summarized previously. Some of these features are rather surprising when compared with metal-on-metal adsorption and growth. Opportunities for future work are pointed out.

  15. Bose-Einstein condensate strings

    E-Print Network [OSTI]

    Tiberiu Harko; Matthew J. Lake

    2015-01-17T23:59:59.000Z

    We consider the possible existence of gravitationally bound general relativistic strings consisting of Bose-Einstein condensate (BEC) matter which is described, in the Newtonian limit, by the zero temperature time-dependent nonlinear Schr\\"odinger equation (the Gross-Pitaevskii equation), with repulsive interparticle interactions. In the Madelung representation of the wave function, the quantum dynamics of the condensate can be formulated in terms of the classical continuity equation and the hydrodynamic Euler equations. In the case of a condensate with quartic nonlinearity, the condensates can be described as a gas with two pressure terms, the interaction pressure, which is proportional to the square of the matter density, and the quantum pressure, which is without any classical analogue though, when the number of particles in the system is high enough, the latter may be neglected. By assuming cylindrical symmetry, we analyze the physical properties of the BEC strings in both the interaction pressure and quantum pressure dominated limits, by numerically integrating the gravitational field equations. In this way we obtain a large class of stable stringlike astrophysical objects, whose basic parameters (mass density and radius) depend sensitively on the mass and scattering length of the condensate particle, as well as on the quantum pressure of the Bose-Einstein gas.

  16. Free Energy Formalism for Particle Adsorption

    E-Print Network [OSTI]

    Pierre Gosselin; Herve Mohrbach

    2005-02-04T23:59:59.000Z

    The equilibrium properties of particles adsorption is investigated theoretically. The model relies on a free energy formulation which allows to generalize the Maxwell-Boltzmann description to solutions for which the bulk volume fraction of potentially adsorbed particles is very high. As an application we consider the equilibrium physical adsorption of neutral and charged particles from solution onto two parallel adsorbing surfaces.

  17. Absorption heat pump system

    DOE Patents [OSTI]

    Grossman, Gershon (Oak Ridge, TN)

    1984-01-01T23:59:59.000Z

    The efficiency of an absorption heat pump system is improved by conducting liquid from a second stage evaporator thereof to an auxiliary heat exchanger positioned downstream of a primary heat exchanger in the desorber of the system.

  18. Absorption heat pump system

    DOE Patents [OSTI]

    Grossman, G.

    1982-06-16T23:59:59.000Z

    The efficiency of an absorption heat pump system is improved by conducting liquid from a second stage evaporator thereof to an auxiliary heat exchanger positioned downstream of a primary heat exchanger in the desorber of the system.

  19. Adsorption -capacity data for 283 organic compounds

    SciTech Connect (OSTI)

    Yaws, C.L.; Bu, L.; Nijhawan, S. [Lamar Univ., Beaumont, TX (United States)

    1995-05-01T23:59:59.000Z

    Adsorption on activated carbon is a widely used method for removing volatile organic compounds (VOCs) from gases and other exhaust streams. This article presents a compilation of adsorption-capacity data as a function of the VOC concentration in the gas. The results are useful in engineering and environmental studies, and in the design of carbon-based adsorption systems to remove unwanted organic pollutants from gases. For vapor control, carbon-based systems typically combine a carbon-adsorption unit with a secondary control method to reclaim or destroy the vapors desorbed during carbon-bed regeneration. To remove organics dissolved in wastewater, air stripping is typically used to transfer the organics to a vapor stream. Carbon adsorption is then used to separate the organics from the stripper exhaust. Collected vapors can be recovered for reuse or destroyed, depending on their value.

  20. STRIPPING OF PROCESS CONDENSATES FROM SOLID FUEL CONVERSION

    E-Print Network [OSTI]

    Hill, Joel David

    2013-01-01T23:59:59.000Z

    V. Stripping of Process Condensate A. Introduction B. Flowand High-Temperature Stripping of SRC Condensate Water E.Process Condensate Handling and Storage Results and

  1. Heat transfer via dropwise condensation on hydrophobic microstructured surfaces

    E-Print Network [OSTI]

    Ruleman, Karlen E. (Karlen Elizabeth)

    2009-01-01T23:59:59.000Z

    Dropwise condensation has the potential to greatly increase heat transfer rates. Heat transfer coefficients by dropwise condensation and film condensation on microstructured silicon chips were compared. Heat transfer ...

  2. Solar selective absorption coatings

    DOE Patents [OSTI]

    Mahoney, Alan R. (Albuquerque, NM); Reed, Scott T. (Albuquerque, NM); Ashley, Carol S. (Albuquerque, NM); Martinez, F. Edward (Horseheads, NY)

    2004-08-31T23:59:59.000Z

    A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.

  3. Solar selective absorption coatings

    DOE Patents [OSTI]

    Mahoney, Alan R. (Albuquerque, NM); Reed, Scott T. (Albuquerque, NM); Ashley, Carol S. (Albuquerque, NM); Martinez, F. Edward (Horseheads, NY)

    2003-10-14T23:59:59.000Z

    A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.

  4. Optical absorption measurement system

    DOE Patents [OSTI]

    Draggoo, Vaughn G. (Livermore, CA); Morton, Richard G. (San Diego, CA); Sawicki, Richard H. (Pleasanton, CA); Bissinger, Horst D. (Livermore, CA)

    1989-01-01T23:59:59.000Z

    The system of the present invention contemplates a non-intrusive method for measuring the temperature rise of optical elements under high laser power optical loading to determine the absorption coefficient. The method comprises irradiating the optical element with a high average power laser beam, viewing the optical element with an infrared camera to determine the temperature across the optical element and calculating the absorption of the optical element from the temperature.

  5. Condensed hydrogen for thermonuclear fusion

    SciTech Connect (OSTI)

    Kucheyev, S. O.; Hamza, A. V. [Nanoscale Synthesis and Characterization Laboratory, Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)

    2010-11-15T23:59:59.000Z

    Inertial confinement fusion (ICF) power, in either pure fusion or fission-fusion hybrid reactors, is a possible solution for future world's energy demands. Formation of uniform layers of a condensed hydrogen fuel in ICF targets has been a long standing materials physics challenge. Here, we review the progress in this field. After a brief discussion of the major ICF target designs and the basic properties of condensed hydrogens, we review both liquid and solid layering methods, physical mechanisms causing layer nonuniformity, growth of hydrogen single crystals, attempts to prepare amorphous and nanostructured hydrogens, and mechanical deformation behavior. Emphasis is given to current challenges defining future research areas in the field of condensed hydrogens for fusion energy applications.

  6. Holes in the ghost condensate

    SciTech Connect (OSTI)

    Krotov, D. [Institute for Nuclear Research of the Russian Academy of Sciences, 60th October Anniversary prospect 7a, Moscow 117312 (Russian Federation); Moscow State University, Department of Physics, Vorobjevy Gory, Moscow, 119899 (Russian Federation); Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya, 25, Moscow, 117259 (Russian Federation); Rebbi, C. [Department of Physics, Boston University, 590 Commonwealth Avenue, Boston Massachusetts 02215 (United States); Rubakov, V. [Institute for Nuclear Research of the Russian Academy of Sciences, 60th October Anniversary prospect 7a, Moscow 117312 (Russian Federation); Zakharov, V. [Max-Planck Institut fuer Physik, Foeringer Ring 6, 80805, Munichn (Germany)

    2005-02-15T23:59:59.000Z

    In a recently proposed model of 'ghost condensation', spatially homogeneous states may mix, via tunneling, with inhomogeneous states which are somewhat similar to bubbles in the theory of false vacuum decay, the corresponding bubble nucleation rate being exponentially sensitive to the ultraviolet completion of the model. The conservation of energy and charge requires that the energy density is negative and the field is strongly unstable in a part of the nucleated bubble. Unlike in the theory of false vacuum decay, this region does not expand during subsequent real-time evolution. In the outer part, positive energy outgoing waves develop, which eventually form shocks. Behind the outgoing waves and away from the bubble center, the background settles down to its original value. The outcome of the entire process is thus a microscopic region of negative energy and strong field - 'hole in the ghost condensate' - plus a collection of outgoing waves (particles of the ghost condensate field) carrying away finite energy.

  7. Tripol condensate polishing - operational experience

    SciTech Connect (OSTI)

    Swainsbury, D. [Mission Energy Management Australia, Victoria (Australia)

    1995-01-01T23:59:59.000Z

    This paper gives a brief outline of the Mission Energy Management Australia Company who operate and maintain the Loy Yang B Power Station in the Latrobe Valley, Victoria, Australia. Details of the plant configuration, the water/steam circuit and cycle chemistry are discussed. The arrangement of the TRIPOL Condensate Polishing Plant and it`s operational modes are examined. Results of the first twelve months operation of the TRIPOL plant are detailed. Levels of crud removal during early commissioning phases employing the pre-filter are presented. Typical parameters achieved during a simulated condenser leak and an operational run beyond the ammonia break point are also documented.

  8. Gas condensate damage in hydraulically fractured wells

    E-Print Network [OSTI]

    Adeyeye, Adedeji Ayoola

    2004-09-30T23:59:59.000Z

    Company. The well was producing a gas condensate reservoir and questions were raised about how much drop in flowing bottomhole pressure below dewpoint would be appropriate. Condensate damage in the hydraulic fracture was expected to be of significant...

  9. Forced-convection condensation inside tubes

    E-Print Network [OSTI]

    Traviss, Donald P.

    1971-01-01T23:59:59.000Z

    High vapor velocity condensation inside a tube was studied analytically. The von Karman universal velocity distribution was applied to the condensate flow, pressure drops were calculated using the Lockhart- Martinelli ...

  10. One-pot solvothermal synthesis of dual-phase titanate/titania Nanoparticles and their adsorption and photocatalytic Performances

    SciTech Connect (OSTI)

    Cheng, Yu Hua; Gong, Dangguo; Tang, Yuxin; Ho, Jeffery Weng Chye; Tay, Yee Yan; Lau, Wei Siew; Wijaya, Olivia; Lim, Jiexiang; Chen, Zhong, E-mail: aszchen@ntu.edu.sg

    2014-06-01T23:59:59.000Z

    Dual phase titanate/titania nanoparticles undergo phase transformation gradually with the increase of solvothermal synthesis temperature from 100 °C to 200 °C, and eventually are fully transformed into anatase TiO{sub 2}. The crystal structure change results in the changes of optical absorption, sensitizer/dopant formation and surface area of the materials which finally affect the overall dye removal ability. Reactions under dark and light have been conducted to distinguish the contributions of surface adsorption from photocatalytic degradation. The sample synthesized at 160 °C (S160) shows the best performances for both adsorption under dark and photocatalytic degradation of methylene blue (MB) under visible light irradiation. The adsorption mechanism for S160 is determined as monolayer adsorption based on the adsorption isotherm test under dark condition, and an impressive adsorption capacity of 162.19 mg/g is achieved. For the photocatalytic application, this sample at 0.1 g/L loading is also able to degrade 20 ppm MB within 6 hours under the visible light (>420 nm) condition. - Graphical abstract: The effect of solvothermal synthesis temperature on the formation and dye removal performance of dual phase titanate/titania nanoparticles was unveiled and optimized. - Highlights: • Low temperature one-pot solvothermal synthesis of dual-phase photocatalysts. • Correlation of the synthesis temperature is made with the phase composition. • Adsorption isotherm, kinetics, photocatalytic degradation were studied. • Synthesis at 160 °C yields the best material for adsorption of MB in dark. • The same sample also shows the best visible light degradation of MB.

  11. Magnets & Magnet Condensed Matter Science

    E-Print Network [OSTI]

    McQuade, D. Tyler

    18 No. 1 CONDENSED MATTER SCIENCE Technique development, graphene, magnetism & magnetic materials Pressure 9 Metal to Insulator Transition on the N=0 Landau Level in Graphene 10 Evidence for Fractional Quantum Hall States in Suspended Bilayer and Trilayer Graphene 11 Fractional Quantum Hall Effect

  12. Landau gauge condensates from global color model

    E-Print Network [OSTI]

    Zhao Zhang; Wei-qin Zhao

    2006-03-23T23:59:59.000Z

    We compute the dimension-2 gluon pair condensate $g^2$ and the dimension-4 mixed quark-gluon condensate $$ in Landau gauge within the framework of global color model. The result for the dynamical gluon mass is within the range given by other independent determinations. The obtained mixed Landau gauge condensate $$ is clearly dependent on the definitions of the condensates. We show that the consistent result may be obtained when the same definitions are used.

  13. Adsorption calorimetry in enhanced oil recovery

    SciTech Connect (OSTI)

    Noll, L.A.

    1988-05-01T23:59:59.000Z

    Adsorption calorimetry is a technique which has been used at the National Institute for Petroleum and Energy Reserch (NIPER) to help in the understanding of adsorption as it impacts enhanced oil recovery by chemical flooding. Abstraction of chemicals by reservoir minerals comprises a major obstacle to the technical and economic success of this process. Adsorption is also important in other fields such as catalysis, lubrication, ore flotation, and printing. Adsorption calorimetry is useful because it measures both the amount of adsorption and its enthalpy. The enthalpy helps to guide the extrapolation of adsorption to higher temperatures as well as acting as a probe of surface properties such as heterogeneity. Adsorption calorimetry helps to distinguish physical from chemisorption. It is also useful in distinguishing water-wet from oil-wet surfaces. This paper discusses flow adsorption calorimetry. The advantage of using a flowing system over the classic immersion technique is that it is fast and easy to use, and data for the entire isotherm are collected on a single sample of solid. In flow calorimetry the surface excess amount and the thermal data are obtained simultaneously on one and the same sample of solid, thus avoiding some sampling problems. Some disadvantages of the method are somewhat short equilibration times and the cumulative nature of the data. Aspects of adsorption of special interest to enhanced oil recovery such as the nature and charge of minerals, the structure and charge of surfactants, the effects of brine and temperature, and the effects of aqueous or hydrocarbon environment are important parameters of surfactant flooding; they are treated in this paper.

  14. Counterflow absorber for an absorption refrigeration system

    DOE Patents [OSTI]

    Reimann, Robert C. (Lafayette, NY)

    1984-01-01T23:59:59.000Z

    An air-cooled, vertical tube absorber for an absorption refrigeration system is disclosed. Strong absorbent solution is supplied to the top of the absorber and refrigerant vapor is supplied to the bottom of the absorber to create a direct counterflow of refrigerant vapor and absorbent solution in the absorber. The refrigeration system is designed so that the volume flow rate of refrigerant vapor in the tubes of the absorber is sufficient to create a substantially direct counterflow along the entire length of each tube in the absorber. This provides several advantages for the absorber such as higher efficiency and improved heat transfer characteristics, and allows improved purging of non-condensibles from the absorber.

  15. Colliding and Moving Bose-Einstein Condensates: Studies of superfluidity and optical tweezers for condensate transport

    E-Print Network [OSTI]

    Colliding and Moving Bose-Einstein Condensates: Studies of superfluidity and optical tweezers for condensate transport by Ananth P. Chikkatur Submitted to the Department of Physics in partial fulfillment Bose-Einstein Condensates: Studies of superfluidity and optical tweezers for condensate transport

  16. Adsorption Kinetics of Surfactants at Fluid-Fluid Interfaces

    E-Print Network [OSTI]

    Andelman, David

    Adsorption Kinetics of Surfactants at Fluid-Fluid Interfaces Haim Diamant and David Andelman School-Fluid Interfaces, Adsorption, Adsorption Kinetics, Interfacial Tension. 1 #12;Abstract We review a new theoretical approach to the kinetics of surfactant adsorption at fluid-fluid interfaces. It yields a more complete

  17. Adsorption of intact methanol on Ru,,0001... Pawel Gazdzicki,1

    E-Print Network [OSTI]

    Adsorption of intact methanol on Ru,,0001... Pawel Gazdzicki,1 Per Uvdal,2 and Peter Jakob1,a 1 the adsorption of methanol on the clean Ru 0001 surface at T 80 K. Thereby, clear evidence for intact adsorption upon adsorption of methanol on Ru 0001 , even at low temperatures, as well as partial recombinative

  18. Extracting gluon condensate from the average plaquette

    E-Print Network [OSTI]

    Lee, Taekoon

    2015-01-01T23:59:59.000Z

    The perturbative contribution in the average plaquette is subtracted using Borel summation and the remnant of the plaquette is shown to scale as a dim-4 condensate. A critical review is presented of the renormalon subtraction scheme that claimed a dim-2 condensate. The extracted gluon condensate is compared with the latest result employing high order (35-loop) calculation in the stochastic perturbation theory.

  19. Proceedings: 2000 Workshop on Condensate Polishing

    SciTech Connect (OSTI)

    None

    2001-06-01T23:59:59.000Z

    Condensate polishing maintains control of impurities in the nuclear power plant and allows the unit to operate more reliably. This report presents proceedings of EPRI's 2000 Workshop on Condensate Polishing, where 30 papers were presented on current issues and utility experience involving condensate polishing at both pressurized water reactor (PWR) and boiling water reactor (BWR) plants.

  20. Adsorption characteristics of siloxanes in landfill gas by the adsorption equilibrium test

    SciTech Connect (OSTI)

    Nam, Sangchul; Namkoong, Wan [Department of Environmental Engineering, Konkuk University, Hwayang-Dong, Gwangjin-Gu, Seoul 143-701 (Korea, Republic of); Kang, Jeong-Hee; Park, Jin-Kyu [Department of Environmental Engineering, Anyang University, Anyang 5-Dong, Manan-Gu, Anyang-Si, Gyeonggi-Do 430-714 (Korea, Republic of); Lee, Namhoon, E-mail: nhlee@anyang.ac.kr [Department of Environmental Engineering, Anyang University, Anyang 5-Dong, Manan-Gu, Anyang-Si, Gyeonggi-Do 430-714 (Korea, Republic of)

    2013-10-15T23:59:59.000Z

    Highlights: • Equilibrium test was attempted to evaluate adsorption characteristics of siloxane. • L2 had higher removal efficiency in carbon compared to noncarbon adsorbents. • Total adsorption capacity of siloxane was 300 mg/g by coal activated carbon. • Adsorption characteristics rely on size of siloxane molecule and adsorbent pore. • Conversion of siloxane was caused by adsorption of noncarbon adsorbents. - Abstract: Due to the increase in energy cost by constantly high oil prices and the obligation to reduce greenhouse effect gases, landfill gas is frequently used as an alternative energy source for producing heat and electricity. Most of landfill gas utility facilities, however, are experiencing problems controlling siloxanes from landfill gas as their catalytic oxidizers are becoming fouled by silicon dioxide dust. To evaluate adsorption characteristics of siloxanes, an adsorption equilibrium test was conducted and parameters in the Freundlich and Langmuir isotherms were analyzed. Coconut activated carbon (CA1), coal activated carbon (CA2), impregnated activated carbon (CA3), silicagel (NCA1), and activated alumina (NCA2) were used for the adsorption of the mixed siloxane which contained hexamethyldisiloxane (L2), octamethylcyclotetrasiloxane (D4), and decamethylcyclopentasiloxane (D5). L2 had higher removal efficiency in noncarbon adsorbents compared to carbon adsorbents. The application of Langmuir and Freundlich adsorption isotherm demonstrated that coconut based CA1 and CA3 provided higher adsorption capacity on L2. And CA2 and NCA1 provided higher adsorption capacity on D4 and D5. Based on the experimental results, L2, D4, and D5 were converted by adsorption and desorption in noncarbon adsorbents. Adsorption affinity of siloxane is considered to be affect by the pore size distribution of the adsorbents and by the molecular size of each siloxane.

  1. Absorption heat pump system

    DOE Patents [OSTI]

    Grossman, Gershon (Oak Ridge, TN); Perez-Blanco, Horacio (Knoxville, TN)

    1984-01-01T23:59:59.000Z

    An improvement in an absorption heat pump cycle is obtained by adding adiabatic absorption and desorption steps to the absorber and desorber of the system. The adiabatic processes make it possible to obtain the highest temperature in the absorber before any heat is removed from it and the lowest temperature in the desorber before heat is added to it, allowing for efficient utilization of the thermodynamic availability of the heat supply stream. The improved system can operate with a larger difference between high and low working fluid concentrations, less circulation losses, and more efficient heat exchange than a conventional system.

  2. Infrared vibrational studies of CO adsorption on Cu/Pt(lll) and CuPt(111) Jo& A. Rodriguez,@ Charles M. Truong, and D. Wayne Goodmanb)

    E-Print Network [OSTI]

    Goodman, Wayne

    Infrared vibrational studies of CO adsorption on Cu/Pt(lll) and CuPt(111) surfaces Jo& A. Rodriguez supported on Pt ( 111) has been studied using infrared reflection absorption spectroscopy (IRAS). Our results indicate that the infrared intensities of adsorbed CO are not representative of the relative

  3. CO Oxidation over AuPd(100) from Ultrahigh Vacuum to Near-Atmospheric Pressures: CO Adsorption-Induced Surface Segregation and Reaction Kinetics

    E-Print Network [OSTI]

    Goodman, Wayne

    ; ReVised Manuscript ReceiVed: July 7, 2009 Polarization-modulation infrared reflection absorptionCO Oxidation over AuPd(100) from Ultrahigh Vacuum to Near-Atmospheric Pressures: CO Adsorption vacuum (UHV) and near-atmospheric pressures.28 AuPd(100) is a good choice for the study since

  4. Inverted critical adsorption of polyelectrolytes in confinement

    E-Print Network [OSTI]

    de Carvalho, Sidney J; Cherstvy, Andrey G

    2015-01-01T23:59:59.000Z

    What are the fundamental laws for the adsorption of charged polymers onto oppositely charged surfaces, for convex, planar, and concave geometries? This question is at the heart of surface coating applications, various complex formation phenomena, as well as in the context of cellular and viral biophysics. It has been a long-standing challenge in theoretical polymer physics; for realistic systems the quantitative understanding is however often achievable only by computer simulations. In this study, we present the findings of such extensive Monte-Carlo in silico experiments for polymer-surface adsorption in confined domains. We study the inverted critical adsorption of finite-length polyelectrolytes in three fundamental geometries: planar slit, cylindrical pore, and spherical cavity. The scaling relations extracted from simulations for the critical surface charge density $\\sigma_c$-defining the adsorption-desorption transition-are in excellent agreement with our analytical calculations based on the ground-state...

  5. Adsorption and transport of pyrithiobac in soils

    E-Print Network [OSTI]

    Matocha, Christopher John

    1996-01-01T23:59:59.000Z

    adsorbents (Gonzales bentonite, Georgia kaolinite, goethite, and Michigan peat) and four soils (Houston Black c, Hidalgo sl, Orelia scl, and Ships sic) having a wide range of physical and chemical properties. Adsorption isotherms were developed...

  6. Entangled light from Bose-Einstein condensates

    E-Print Network [OSTI]

    H. T. Ng; S. Bose

    2008-09-30T23:59:59.000Z

    We propose a method to generate entangled light with a Bose-Einstein condensate trapped in a cavity, a system realized in recent experiments. The atoms of the condensate are trapped in a periodic potential generated by a cavity mode. The condensate is continuously pumped by a laser and spontaneously emits a pair of photons of different frequencies in two distinct cavity modes. In this way, the condensate mediates entanglement between two cavity modes which leak out and can be separated and exhibit continuous variable entanglement. The scheme exploits the experimentally demonstrated strong, steady and collective coupling of condensate atoms to a cavity field.

  7. Quark and Gluon Condensates in Isospin Matter

    E-Print Network [OSTI]

    Lianyi He; Yin Jiang; Pengfei Zhuang

    2009-05-03T23:59:59.000Z

    Applying the Hellmann-Feynman theorem to a charged pion gas, the quark and gluon condensates at low isospin density are determined by precise pion properties. At intermediate density around $ f_\\pi^2m_\\pi$, from both the estimation for the dilute pion gas and the calculation with Nambu--Jona-Lasinio model, the quark condensate is strongly and monotonously suppressed, while the gluon condensate is enhanced and can be larger than its vacuum value. This unusual behavior of the gluon condensate is universal for Bose condensed matter of mesons. Our results can be tested by lattice calculations at finite isospin density.

  8. Uranium recovery from seawater by adsorption

    SciTech Connect (OSTI)

    Koske, P.H.; Ohlrogge, K.; Peinemann, K.V.

    1988-10-01T23:59:59.000Z

    Results are presented of a 10 weeks field experiment producing uranium from seawater by the so-called adsorber-loop-concept. For the adsorption process polyamidoxin (PAO) granulate has been used with grain sizes between 0.3 - 1.2 mm diameter. The performance of the adsorber and the efficiency of the adsorption process - especially with regard to high volume flows of seawater - are presented.

  9. Intrinsic AGN Absorption Lines

    E-Print Network [OSTI]

    Fred Hamann

    2000-06-12T23:59:59.000Z

    Strong absorption lines are common in rest-frame UV spectra of AGNs due to a variety of resonant transitions, for example the HI Lyman series lines (most notably Ly-alpha 1216) and high-ionization doublets like CIV 1549,1551. The lines are called ``intrinsic'' if the absorbing gas is physically related to the AGN, e.g. if the absorber resides broadly within the radius of the AGN's surrounding ``host'' galaxy. Intrinsic absorption lines are thus valuable probes of the kinematics, physical conditions and elemental abundances in the gas near AGNs. Studies of intrinsic absorbers have historically emphasized the broad absorption lines (BALs) in quasars. Today we recognize a wider variety of intrinsic lines in a wider range of objects. For example, we now know that Seyfert 1 galaxies (the less luminous cousins of quasars) have intrinsic absorption. We also realize that intrinsic lines can form in a range of AGN environments --- from the dynamic inner regions like the BALs, to the more quiescent outer host galaxies >10 kpc away. This article provides a brief introduction to current observational and theoretical work on intrinsic AGN absorbers.

  10. Condensate polishing at Plant Bowen

    SciTech Connect (OSTI)

    Friedman, K.A.; Siegwarth, D.P.; Sawochka, S.G.; McNea, D.A.; Suhonen, C.H.

    1984-02-01T23:59:59.000Z

    Condensate polisher system design and operation were evaluated at the fosssil-fueled Plant Bowen of Georgia Power Company relative to the ability of the polishers to achieve an effluent chemical quality consistent with PWR Steam Generator Owners Group Chemistry Guidelines. Polishers regenerated employing the Seprex and Ammonex processes were evaluated during normal plant operation and during periods of simulated condenser inleakage. Although polisher effluent quality was acceptable relative to boiler corrosion control at Plant Bowen, it was inconsistent with that required for recirculating PWR steam generators. Polisher effluent quality was reasonably consistent with requirements for PWR once-through steam generator systems. High polisher cation to anion resin equivalence ratios (3.4 to 1), and insufficiently rapid anion resin kinetics were the major reasons for the observed non-optimum polisher performance.

  11. Polymer Bose--Einstein Condensates

    E-Print Network [OSTI]

    E. Castellanos; G. Chacon-Acosta

    2013-01-22T23:59:59.000Z

    In this work we analyze a non--interacting one dimensional polymer Bose--Einstein condensate in an harmonic trap within the semiclassical approximation. We use an effective Hamiltonian coming from the polymer quantization that arises in loop quantum gravity. We calculate the number of particles in order to obtain the critical temperature. The Bose--Einstein functions are replaced by series, whose high order terms are related to powers of the polymer length. It is shown that the condensation temperature presents a shift respect to the standard case, for small values of the polymer scale. In typical experimental conditions, it is possible to establish a bound for $\\lambda^{2}$ up to $ \\lesssim 10 ^{-16}$m$^2$. To improve this bound we should decrease the frequency of the trap and also decrease the number of particles.

  12. The Effect of Condensates on the Characterization of Transiting Planet Atmospheres with Transmission Spectroscopy

    E-Print Network [OSTI]

    Jonathan J. Fortney

    2005-09-28T23:59:59.000Z

    Through a simple physical argument we show that the slant optical depth through the atmosphere of a "hot Jupiter" planet is 35-90 times greater than the normal optical depth. This not unexpected result has direct consequences for the method of transmission spectroscopy for characterizing the atmospheres of transiting giant planets. The atmospheres of these planets likely contain minor condensates and hazes which at normal viewing geometry have negligible optical depth, but at slant viewing geometry have appreciable optical depth that can obscure absorption features of gaseous atmospheric species. We identify several possible condensates. We predict that this is a general masking mechanism for all planets, not just for HD 209458b, and will lead to weaker than expected or undetected absorption features. Constraints on an atmosphere from transmission spectroscopy are not the same as constraints on an atmosphere at normal viewing geometry.

  13. Color Glass Condensate and Glasma

    E-Print Network [OSTI]

    F. Gelis

    2012-11-26T23:59:59.000Z

    We review the Color Glass Condensate effective theory, that describes the gluon content of a high energy hadron or nucleus, in the saturation regime. The emphasis is put on applications to high energy heavy ion collisions. After describing initial state factorization, we discuss the Glasma phase, that precedes the formation of an equilibrated quark-gluon plasma. We end this review with a presentation of recent developments in the study of the isotropization and thermalization of the quark-gluon plasma.

  14. Holographic Superconductors with Various Condensates

    E-Print Network [OSTI]

    Gary T. Horowitz; Matthew M. Roberts

    2008-11-04T23:59:59.000Z

    We extend earlier treatments of holographic superconductors by studying cases where operators of different dimension condense in both 2+1 and 3+1 superconductors. We also compute a correlation length. We find surprising regularities in quantities such as $\\omega_g/T_c$ where $\\omega_g$ is the gap in the frequency dependent conductivity. In special cases, new bound states arise corresponding to vector normal modes of the dual near-extremal black holes.

  15. Apparatus for thermal swing adsorption and thermally-enhanced pressure swing adsorption

    DOE Patents [OSTI]

    Wegeng, Robert S.; Rassat, Scot D.; Stenkamp, Victoria S.; TeGrotenhuis, Ward E.; Matson, Dean W.; Drost, M. Kevin; Viswanathan, Vilayanur V.

    2005-12-13T23:59:59.000Z

    The present invention provides compact adsorption systems that are capable of rapid temperature swings and rapid cycling. Novel methods of thermal swing adsorption and thermally-enhanced pressure swing adsorption are also described. In some aspects of the invention, a gas is passed through the adsorbent thus allowing heat exchangers to be very close to all portions of the adsorbent and utilize less space. In another aspect, the adsorption media is selectively heated, thus reducing energy costs. Methods and systems for gas adsorption/desorption having improved energy efficiency with capability of short cycle times are also described. Advantages of the invention include the ability to use (typically) 30-100 times less adsorbent compared to conventional systems.

  16. Method and apparatus for thermal swing adsorption and thermally-enhanced pressure swing adsorption

    DOE Patents [OSTI]

    Wegeng, Robert S.; Rassat, Scot D.; TeGrotenhuis, Ward E.; Drost, Kevin; Vishwanathan, Vilayanur V.

    2004-06-08T23:59:59.000Z

    The present invention provides compact adsorption systems that are capable of rapid temperature swings and rapid cycling. Novel methods of thermal swing adsorption and thermally-enhanced pressure swing adsorption are also described. In some aspects of the invention, a gas is passed through the adsorbent thus allowing heat exchangers to be very close to all portions of the adsorbent and utilize less space. In another aspect, the adsorption media is selectively heated, thus reducing energy costs. Methods and systems for gas adsorption/desorption having improved energy efficiency with capability of short cycle times are also described. In another aspect, the apparatus or methods utilize heat exchange channels of varying lengths that have volumes controlled to provide equal heat fluxes. Methods of fuel cell startup are also described. Advantages of the invention include the ability to use (typically) 30-100 times less adsorbent compared to conventional systems.

  17. Method for thermal swing adsorption and thermally-enhanced pressure swing adsorption

    DOE Patents [OSTI]

    Wegeng, Robert S.; Rassat, Scot D.; Stenkamp, Victoria S.; TeGrotenhuis, Ward E.; Matson, Dean W.; Drost, M. Kevin; Viswanathan, Vilayanur V.

    2003-10-07T23:59:59.000Z

    The present invention provides compact adsorption systems that are capable of rapid temperature swings and rapid cycling. Novel methods of thermal swing adsorption and thermally-enhanced pressure swing adsorption are also described. In some aspects of the invention, a gas is passed through the adsorbent thus allowing heat exchangers to be very close to all portions of the adsorbent and utilize less space. In another aspect, the adsorption media is selectively heated, thus reducing energy costs. Methods and systems for gas adsorption/desorption having improved energy efficiency with capability of short cycle times are also described. Advantages of the invention include the ability to use (typically) 30-100 times less adsorbent compared to conventional systems.

  18. The Quantum Absorption Refrigerator

    E-Print Network [OSTI]

    Amikam Levy; Ronnie Kosloff

    2011-11-09T23:59:59.000Z

    A quantum absorption refrigerator driven by noise is studied with the purpose of determining the limitations of cooling to absolute zero. The model consists of a working medium coupled simultaneously to hot, cold and noise baths. Explicit expressions for the cooling power are obtained for Gaussian and Poisson white noise. The quantum model is consistent with the first and second laws of thermodynamics. The third law is quantified, the cooling power J_c vanishes as J_c proportional to T_c^{alpha}, when T_c approach 0, where alpha =d+1 for dissipation by emission and absorption of quanta described by a linear coupling to a thermal bosonic field, where d is the dimension of the bath.

  19. Bio-oil fractionation and condensation

    DOE Patents [OSTI]

    Brown, Robert C; Jones, Samuel T; Pollard, Anthony

    2013-07-02T23:59:59.000Z

    A method of fractionating bio-oil vapors which involves providing bio-oil vapors comprising bio-oil constituents is described. The bio-oil vapors are cooled in a first stage which comprises a condenser having passages for the bio-oil separated by a heat conducting wall from passages for a coolant. The coolant in the condenser of the first stage is maintained at a substantially constant temperature, set at a temperature in the range of 75 to 100.degree. C., to condense a first liquid fraction of liquefied bio-oil constituents in the condenser of the first stage. The first liquid fraction of liquified bio-oil constituents from the condenser in the first stage is collected. Also described are steps for subsequently recovering further liquid fractions of liquefied bio-oil constituents. Particular compositions of bio-oil condensation products are also described.

  20. Can Spacetime be a Condensate?

    E-Print Network [OSTI]

    B. L. Hu

    2005-05-21T23:59:59.000Z

    We explore further the proposal that general relativity is the hydrodynamic limit of some fundamental theories of the microscopic structure of spacetime and matter, i.e., spacetime described by a differentiable manifold is an emergent entity and the metric or connection forms are collective variables valid only at the low energy, long wavelength limit of such micro-theories. In this view it is more relevant to find ways to deduce the microscopic ingredients of spacetime and matter from their macroscopic attributes than to find ways to quantize general relativity because it would only give us the equivalent of phonon physics, not the equivalents of atoms or quantum electrodyanmics. It may turn out that spacetime is merely a representation of collective state of matter in some limiting regime of interactions, which is the view expressed by Sakharov. In this talk, working within the conceptual framework of geometro-hydrodynamics, we suggest a new way to look at the nature of spacetime inspired by Bose-Einstein Condensate (BEC) physics. We ask the question whether spacetime could be a condensate, even without the knowledge of what the `atom of spacetime' is. We begin with a summary of the main themes for this new interpretation of cosmology and spacetime physics, and the `bottom-up' approach to quantum gravity. We then describe the `Bosenova' experiment of controlled collapse of a BEC and our cosmology-inspired interpretation of its results. We discuss the meaning of a condensate in different context. We explore how far this idea can sustain, its advantages and pitfalls, and its implications on the basic tenets of physics and existing programs of quantum gravity.

  1. Analysis of condensate banking dynamics in a gas condensate reservoir under different injection schemes

    E-Print Network [OSTI]

    Sandoval Rodriguez, Angelica Patricia

    2002-01-01T23:59:59.000Z

    condensate reservoir under natural depletion, and injection of methane, injection of carbon dioxide, produced gas recycling and water injection. To monitor the condensate banking dynamics near the wellbore area, such as oil saturation and compositional...

  2. Alleviation of effective permeability reduction of gas-condensate due to condensate buildup near wellbore

    E-Print Network [OSTI]

    Carballo Salas, Jose Gilberto

    2006-04-12T23:59:59.000Z

    When the reservoir pressure is decreased below dew point pressure of the gas near the wellbore, gas-condensate wells start to decrease production because condensate is separated from the gas around the wellbore causing a decrease in gas relative...

  3. Alleviation of effective permeability reduction of gas-condensate due to condensate buildup near wellbore 

    E-Print Network [OSTI]

    Carballo Salas, Jose Gilberto

    2006-04-12T23:59:59.000Z

    When the reservoir pressure is decreased below dew point pressure of the gas near the wellbore, gas-condensate wells start to decrease production because condensate is separated from the gas around the wellbore causing a ...

  4. Electrohydrodynamically enhanced condensation heat transfer

    E-Print Network [OSTI]

    Wawzyniak, Markus

    1993-01-01T23:59:59.000Z

    kV (electrode ?1). . . .. . . . . . . Fig. 4. 3 Photograph of liquid bridging &om the helical wire to the condensation surface at 20 kV (electrode ?1) . Fig. 4. 4 Photograph removal of liquid at 20 kV (electrode ?1) . .. Fig. 4. 5 Electrode ?2... . . . . . 32 Fig. 4. 8 Electrode ?3 . Fig. 4. 9 Photograph of liquid extraction (detail A), and liquid removal (detail B) at 15 kV (electrode ?3) . . Fig. 4. 10 Electrode ?4. Fig. 4. 11 Electrode ?5. Fig. 4. 12 Photograph of electrode ?5 at 12 kV...

  5. Quantum Condensates in Nuclear Matter: Problems

    E-Print Network [OSTI]

    G. Ropke; D. Zablocki

    2010-01-11T23:59:59.000Z

    In connection with the contribution "Quantum Condensates in Nuclear Matter" some problems are given to become more familiar with the techniques of many-particle physics.

  6. Treatment of evaporator condensates by pervaporation

    DOE Patents [OSTI]

    Blume, Ingo (Hengelq, NL); Baker, Richard W. (Palo Alto, CA)

    1990-01-01T23:59:59.000Z

    A pervaporation process for separating organic contaminants from evaporator condensate streams is disclosed. The process employs a permselective membrane that is selectively permeable to an organic component of the condensate. The process involves contacting the feed side of the membrane with a liquid condensate stream, and withdrawing from the permeate side a vapor enriched in the organic component. The driving force for the process is the in vapor pressure across the membrane. This difference may be provided for instance by maintaining a vacuum on the permeate side, or by condensing the permeate. The process offers a simple, economic alternative to other separation techniques.

  7. Inverted critical adsorption of polyelectrolytes in confinement

    E-Print Network [OSTI]

    Sidney J. de Carvalho; Ralf Metzler; Andrey G. Cherstvy

    2015-03-06T23:59:59.000Z

    What are the fundamental laws for the adsorption of charged polymers onto oppositely charged surfaces, for convex, planar, and concave geometries? This question is at the heart of surface coating applications, various complex formation phenomena, as well as in the context of cellular and viral biophysics. It has been a long-standing challenge in theoretical polymer physics; for realistic systems the quantitative understanding is however often achievable only by computer simulations. In this study, we present the findings of such extensive Monte-Carlo in silico experiments for polymer-surface adsorption in confined domains. We study the inverted critical adsorption of finite-length polyelectrolytes in three fundamental geometries: planar slit, cylindrical pore, and spherical cavity. The scaling relations extracted from simulations for the critical surface charge density $\\sigma_c$-defining the adsorption-desorption transition-are in excellent agreement with our analytical calculations based on the ground-state analysis of the Edwards equation. In particular, we confirm the magnitude and scaling of $\\sigma_c$ for the concave interfaces versus the Debye screening length $1/\\kappa$ and the extent of confinement $a$ for these three interfaces for small $\\kappa a$ values. For large $\\kappa a$ the critical adsorption condition approaches the planar limit. The transition between the two regimes takes place when the radius of surface curvature or half of the slit thickness $a$ is of the order of $1/\\kappa$. We also rationalize how $\\sigma_c(\\kappa)$ gets modified for semi-flexible versus flexible chains under external confinement. We examine the implications of the chain length onto critical adsorption-the effect often hard to tackle theoretically-putting an emphasis on polymers inside attractive spherical cavities.

  8. First-principles characterization of formate and carboxyl adsorption...

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

    formate and carboxyl adsorption on the stoichiometric CeO2(111) and CeO2(110) surfaces. First-principles characterization of formate and carboxyl adsorption on the stoichiometric...

  9. Adsorption and Reaction of Acetaldehyde on Stoichiometric and...

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

    Adsorption and Reaction of Acetaldehyde on Stoichiometric and Defective SrTiO(100) Surfaces. Adsorption and Reaction of Acetaldehyde on Stoichiometric and Defective SrTiO(100)...

  10. Atomic and electronic structures of rubidium adsorption on Si...

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

    electronic structures of rubidium adsorption on Si(001)(2 x 1) surface: Comparison with CsSi(001) surface. Atomic and electronic structures of rubidium adsorption on Si(001)(2 x...

  11. Adsorption, Desorption, and Clustering H20 on Pt (111). | EMSL

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

    Desorption, and Clustering H20 on Pt (111). Adsorption, Desorption, and Clustering H20 on Pt (111). Abstract: The adsorption, desorption, and clustering behavior of H20 on Pt(111)...

  12. Adsorption and Desorption of HCI on Pt(111). | EMSL

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

    Desorption of HCI on Pt(111). Adsorption and Desorption of HCI on Pt(111). Abstract: The adsorption and desorption of HCl on Pt(111) is investigated by temperature programmed...

  13. Direct Visualization of 2-Butanol Adsorption and Dissociation...

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

    Visualization of 2-Butanol Adsorption and Dissociation on TiO2(110). Direct Visualization of 2-Butanol Adsorption and Dissociation on TiO2(110). Abstract: Atomically resolved...

  14. Adsorption, Desorption, and Displacement Kinetics of H2O and...

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

    Displacement Kinetics of H2O and CO2 on TiO2(110). Adsorption, Desorption, and Displacement Kinetics of H2O and CO2 on TiO2(110). Abstract: The adsorption, desorption, and...

  15. Tuning of the Metal-Insulator Transition via Alkali Adsorption

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

    Tuning of the Metal-Insulator Transition via Alkali Adsorption Tuning of the Metal-Insulator Transition via Alkali Adsorption Print Wednesday, 29 March 2006 00:00 Turning a...

  16. Influence of Adsorption Site and Wavelength on the Photodesorption...

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

    Adsorption Site and Wavelength on the Photodesorption of NO from the (Fe,Cr)3O4(111) Mixed Oxide Surface. Influence of Adsorption Site and Wavelength on the Photodesorption of NO...

  17. DNA adsorption at liquid/solid interfaces

    E-Print Network [OSTI]

    Carine Douarche; Robert Cortès; Steven J. Roser; Jean-Louis Sikorav; Alan Braslau

    2008-09-26T23:59:59.000Z

    DNA adsorption on solid or liquid surfaces is a topic of broad fundamental and applied interest. Here we study by x-ray reflectivity the adsorption of monodisperse double-stranded DNA molecules a positively-charged surface, obtained through chemical grafting of a homogeneous organicmonomolecular layer of N-(2-aminoethyl) dodecanamide on an oxide-free monocrystalline Si(111) wafer. The adsorbed dsDNA is found to embed into the soft monolayer which is deformed in the process. The surface coverage is very high and this adsorbed layer is expected to display 2D nematic ordering.

  18. Antiproton Absorption in Nuclei

    E-Print Network [OSTI]

    Yu. T. Kiselev; E. Ya. Paryev

    2006-01-24T23:59:59.000Z

    We present the analysis of experimental data on forward antiproton production on nuclei. The calculations are done in the framework of a folding model which takes properly into account both incoherent direct proton-nucleon and cascade pion-nucleon antiproton production processes as well as internal nucleon momentum distribution. The effective antiproton-nucleon cross section in nuclear matter and the imaginary part of the antiproton nuclear optical potential are estimated to be 25-45 mb and -(38-56) MeV at normal nuclear matter density, respectively. The results of the performed analysis evidence for the decreasing of antiproton absorption in the nuclear medium.

  19. The Condensate from Torus Knots

    E-Print Network [OSTI]

    A. Gorsky; A. Milekhin; N. Sopenko

    2015-06-22T23:59:59.000Z

    We discuss recently formulated instanton-torus knot duality in $\\Omega$-deformed 5D SQED on $\\mathbb{R}^4 \\times S^1$ focusing at the microscopic aspects of the condensate formation in the instanton ensemble. Using the chain of dualities and geometric transitions we embed the SQED with a surface defect into the $SU(2)$ SQCD with $N_f=4$ and identify the numbers $(n,m)$ of the torus $T_{n,m}$ knot as instanton charge and electric charge. The HOMFLY torus knot invariants in the fundamental representation provide entropic factor in the condensate of the massless flavor counting the degeneracy of the instanton--W-boson web with instanton and electric numbers $(n,m)$ but different spin and flavor content. Using the inverse geometrical transition we explain how our approach is related to the evaluation of the HOMFLY invariants in terms of Wilson loop in 3d CS theory. The reduction to 4D theory is briefly considered and some analogy with baryon vertex is conjectured.

  20. Electrical swing adsorption gas storage and delivery system

    DOE Patents [OSTI]

    Judkins, R.R.; Burchell, T.D.

    1999-06-15T23:59:59.000Z

    Systems and methods for electrical swing natural gas adsorption are described. An apparatus includes a pressure vessel; an electrically conductive gas adsorptive material located within the pressure vessel; and an electric power supply electrically connected to said adsorptive material. The adsorptive material can be a carbon fiber composite molecular sieve (CFCMS). The systems and methods provide advantages in that both a high energy density and a high ratio of delivered to stored gas are provided. 5 figs.

  1. Electrical swing adsorption gas storage and delivery system

    DOE Patents [OSTI]

    Judkins, Roddie R. (Knoxville, TN); Burchell, Timothy D. (Oak Ridge, TN)

    1999-01-01T23:59:59.000Z

    Systems and methods for electrical swing natural gas adsorption are described. An apparatus includes a pressure vessel; an electrically conductive gas adsorptive material located within the pressure vessel; and an electric power supply electrically connected to said adsorptive material. The adsorptive material can be a carbon fiber composite molecular sieve (CFCMS). The systems and methods provide advantages in that both a high energy density and a high ratio of delivered to stored gas are provided.

  2. Observation of interference between two Bose condensates The spatial coherence of a Bose condensate was demonstrated by observing

    E-Print Network [OSTI]

    Observation of interference between two Bose condensates The spatial coherence of a Bose condensate was demonstrated by observing interference between two Bose condensates [1]. They were created by cooling atoms the condensates expand for 40 milliseconds and overlap (see figure). This demonstrates that Bose condensed atoms

  3. Collective Excitation Interferometry with a Toroidal Bose-Einstein Condensate

    E-Print Network [OSTI]

    G. Edward Marti; Ryan Olf; Dan M. Stamper-Kurn

    2014-06-26T23:59:59.000Z

    The precision of compact inertial sensing schemes using trapped- and guided-atom interferometers has been limited by uncontrolled phase errors caused by trapping potentials and interactions. Here, we propose an acoustic interferometer that uses sound waves in a toroidal Bose-Einstein condensate to measure rotation, and we demonstrate experimentally several key aspects of this type of interferometer. We use spatially patterned light beams to excite counter-propagating sound waves within the condensate and use \\emph{in situ} absorption imaging to characterize their evolution. We present an analysis technique by which we extract separately the oscillation frequencies of the standing-wave acoustic modes, the frequency splitting caused by static imperfections in the trapping potential, and the characteristic precession of the standing-wave pattern due to rotation. Supported by analytic and numerical calculations, we interpret the noise in our measurements, which is dominated by atom shot noise, in terms of rotation noise. While the noise of our acoustic interferometric sensor, at the level of $\\sim \\mbox{rad}\\, \\mbox{s}^{-1}/\\sqrt{\\mbox{Hz}}$, is high owing to rapid acoustic damping and the small radius of the trap, the proof-of-concept device does operate at $10^4 - 10^6$ times higher density and in a volume $10^9$ times smaller than free-falling atom interferometers.

  4. ccsd00004163, Free Energy Formalism for Particle Adsorption

    E-Print Network [OSTI]

    ccsd­00004163, version 1 ­ 4 Feb 2005 Free Energy Formalism for Particle Adsorption Pierre Gosselin The equilibrium properties of particles adsorption is investigated theoretically. The model relies on a free the equilibrium physical adsorption of neutral and charged particles from solution onto two parallel adsorbing

  5. Quand le charbon nettoie Utilisation de l'adsorption

    E-Print Network [OSTI]

    Liège, Université de

    Quand le charbon nettoie Utilisation de l'adsorption Cédric Gommes, Alain Brasseur, René Pirard'air des premiers sous-marins. Silo Cheminée Filtration Incinérateur Réacteur d 'adsorption Les fumées des.. Afin d 'éviter de rejeter ces molécules dans l'environnement un réacteur d'adsorption est utilisé. Les

  6. Adsorption of Arsenic on Polyaluminum Granulate Jasmin Mertens,*,,

    E-Print Network [OSTI]

    Wehrli, Bernhard

    Adsorption of Arsenic on Polyaluminum Granulate Jasmin Mertens,*,, Jerome Rose,§,¶ Ralf Kagi to be meso- and macroporous, with a specific surface area of 35 ± 1 m2 g-1 . Adsorption experiments were-coprecipitation and adsorption processes using iron (Fe)- or aluminum (Al)-based materials are used most frequently to remove As

  7. Polymer adsorption: concentration effects E. Bouchaud and M. Daoud

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1991 Polymer adsorption: concentration effects E. Bouchaud and M. Daoud Laboratoire Léon Brillouin. - Nous considérons les différents régimes d'adsorption de polymères flexibles en bon solvant, qui d'une solution semi-diluée en volume, nous considérons l'adsorption des blobs. Pour de hautes

  8. Strong adsorption of aminotriazines on graphene James D. Wuesta

    E-Print Network [OSTI]

    Rochefort, Alain

    Strong adsorption of aminotriazines on graphene James D. Wuesta and Alain Rochefortw*b Received (in affinity for graphite and suggest that part of the driving force for adsorption is a specific attractive interaction of NR2 groups with the underlying surface. Molecular adsorption on surfaces is a key step

  9. Anion Adsorption on Oxide Surfaces: Inclusion of the Water

    E-Print Network [OSTI]

    Sverjensky, Dimitri A.

    Anion Adsorption on Oxide Surfaces: Inclusion of the Water Dipole in Modeling the Electrostatics of Earth and Planetary Sciences, The Johns Hopkins University, Baltimore, Maryland 21218 Adsorption of desorption of water dipoles in treating anion adsorption by ligand exchange. Taking this effect into account

  10. ADSORPTION OF CHAIN MOLECULES WITH A POLAR HEAD

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    983 ADSORPTION OF CHAIN MOLECULES WITH A POLAR HEAD A SCALING DESCRIPTION S. ALEXANDER (*) Physique (Reçu le 24 mars 1977, accepte le 4 mai 1977) Résumé. 2014 L'adsorption de molécules en chaînes à une The adsorption of chain molecules at an interface is investigated assuming that the molecule has both a polar

  11. The Adsorption of Arsenic Oxyacids to Iron Oxyhydroxide Columns

    E-Print Network [OSTI]

    The Adsorption of Arsenic Oxyacids to Iron Oxyhydroxide Columns Including Studies of Weakly. (photo: Mr. J. Mähler, image editing Dr. D. Lundberg) #12;The Adsorption of Arsenic Oxyacids to Iron of columns and iron content of the adsorbent material. Experiments have shown that adsorption does occur

  12. Adsorption of Natural Organic Matter to Air-Water Interfaces

    E-Print Network [OSTI]

    Lenhart, John J.

    Adsorption of Natural Organic Matter to Air-Water Interfaces during Transport through Unsaturated. A mathematical model incorporating irreversible, second-order rate laws to simulate adsorption at air theories for SHA adsorption. Introduction Natural organic matter (NOM) consists of a mixture

  13. Adsorption and grafting on colloidal interfaces studied by scattering techniques

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Adsorption and grafting on colloidal interfaces studied by scattering techniques - REVISED) [0] 4 67 14 46 37 12th of October 2006 Abstract The adsorption of polymer and surfactant molecules to be a powerful tool to obtain a detailed description of the layer structure. Adsorption of chemically more

  14. NUREG/CR-6911 Tests of Uranium (VI) Adsorption

    E-Print Network [OSTI]

    NUREG/CR-6911 Tests of Uranium (VI) Adsorption Models in a Field Setting U.S. Geological Survey U/CR-6911 Tests of Uranium (VI) Adsorption Models in a Field Setting Manuscript Completed: August 2006 Date observations clearly demonstrated that in aquifers where U(VI) concentrations are controlled by adsorption

  15. Amphiphile Adsorption on Rigid Polyelectrolytes Paulo S. Kuhn

    E-Print Network [OSTI]

    Barbosa, Marcia C. B.

    Amphiphile Adsorption on Rigid Polyelectrolytes Paulo S. Kuhn Departamento de F´isica, Instituto de, Brazil Abstract A theory is presented which quantitatively accounts for the cooperative adsorption the polyelectrolyte-surfactant, or more realistically, polyelectrolyte-lipid adsorption can be used to neutralize

  16. POLYMER ADSORPTION ON SMALL SPHERES. A SCALING APPROACH

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    977 POLYMER ADSORPTION ON SMALL SPHERES. A SCALING APPROACH S. ALEXANDER (*) Laboratoire de, France (Reçu le 7 mars 1977, révisé le 28 avril 1977, accepté le 4 mai 1977) Résumé. 2014 L'adsorption de résultats fournis par les lois d'échelles pour écrire l'énergie de confinement. Les adsorptions sur des

  17. Multicomponent Adsorption and Chromatography with Uneven Saturation Capacities

    E-Print Network [OSTI]

    Gu, Tingyue

    Multicomponent Adsorption and Chromatography with Uneven Saturation Capacities Tingyue Gu, Gow, the extent of size exclusion is not the same for all the components. This often causes uneven adsorption capacity and vice versa. A study of size exclusion coupled with adsorption is a rel- atively new topic

  18. Article original La srum albumine bovine inhibe l'adsorption

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Article original La sérum albumine bovine inhibe l'adsorption du virus respiratoire syncytial sur conditions optimales d'adsorption du virus respiratoire syncytial bo- vin aux récepteurs de la cellule hôte, ovalbumine et cytochrome c. L'adsorption du virus aux cellules MDBK était meilleure en présence de sérum de

  19. Krypton adsorption on (0001) graphite pre-plated with cyclohexane

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    91 Krypton adsorption on (0001) graphite pre-plated with cyclohexane A. Razafitianamaharavo (1), N étudiée par volumétrie entre 71 et 83 K. L'adsorption de krypton, fortement inhibée par la présence du physisorbed has been studied between 71 and 83 K by means of classical volumetric methods. Krypton adsorption

  20. Adsorption and depletion of polyelectrolytes from charged surfaces Adi Shafira)

    E-Print Network [OSTI]

    Andelman, David

    Adsorption and depletion of polyelectrolytes from charged surfaces Adi Shafira) and David Andelmanb and scaling arguments are presented to model polyelectrolyte adsorption from semidilute solutions onto charged surfaces. Using numerical solutions of the mean-field equations, we show that adsorption exists only

  1. Lithium-Mediated Benzene Adsorption on Graphene and Graphene Nanoribbons

    E-Print Network [OSTI]

    Hod, Oded

    Lithium-Mediated Benzene Adsorption on Graphene and Graphene Nanoribbons Dana Krepel and Oded Hod on lithium adsorption sites at the surface of graphene and nanoribbons thereof are investigated. The effects, bare lithium adsorption turns armchair graphene nanoribbons metallic and their zigzag counterparts half

  2. Strong field physics in condensed matter

    E-Print Network [OSTI]

    Oka, Takashi

    2011-01-01T23:59:59.000Z

    There are deep similarities between non-linear QFT studied in high-energy and non-equilibrium physics in condensed matter. Ideas such as the Schwinger mechanism and the Volkov state are deeply related to non-linear transport and photovoltaic Hall effect in condensed matter. Here, we give a review on these relations.

  3. Strong field physics in condensed matter

    E-Print Network [OSTI]

    Takashi Oka

    2011-02-12T23:59:59.000Z

    There are deep similarities between non-linear QFT studied in high-energy and non-equilibrium physics in condensed matter. Ideas such as the Schwinger mechanism and the Volkov state are deeply related to non-linear transport and photovoltaic Hall effect in condensed matter. Here, we give a review on these relations.

  4. NISTIR 6095 Horizontal Convective Condensation of

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    NISTIR 6095 Horizontal Convective Condensation of Alternative Refrigerants within a Micro-Fin Tube Horizontal Convective Condensation of Alternative Refrigerants Within a Micro-Fin Tube Mark A. Kedzierski J for flow boiling pressure drop in a smooth tube. Correlation of the pressure drop measurements suggested

  5. Dual condensate and QCD phase transition

    SciTech Connect (OSTI)

    Zhang Bo; Bruckmann, Falk [Institut fuer Theoretische Physik, Universitaet Regensburg, D-93040 Regensburg (Germany); Fodor, Zoltan; Szabo, Kalman K. [Department of Physics, University of Wuppertal, Gaussstr. 20, D-42119 (Germany); Gattringer, Christof [Institut fuer Physik, Universitaet Graz, Universitaetsplatz 5, A-8010 Graz (Austria)

    2011-05-23T23:59:59.000Z

    The dual condensate is a new QCD phase transition order parameter, which connnects confinement and chiral symmetry breaking as different mass limits. We discuss the relation between the fermion spectrum at general boundary conditions and the dual condensate and show numerical results for the latter from unquenched SU(3) lattice configurations.

  6. Dynamics of Bose-Einstein Condensates

    E-Print Network [OSTI]

    Benjamin Schlein

    2007-04-05T23:59:59.000Z

    We report on some recent results concerning the dynamics of Bose-Einstein condensates, obtained in a series of joint papers with L. Erdos and H.-T. Yau. Starting from many body quantum dynamics, we present a rigorous derivation of a cubic nonlinear Schroedinger equation known as the Gross-Pitaevskii equation for the time evolution of the condensate wave function.

  7. Direct condensation refrigerant recovery and restoration system

    SciTech Connect (OSTI)

    Grant, D.C.H.

    1992-03-10T23:59:59.000Z

    This patent describes a refrigerant recovery and purification system for removing gaseous refrigerant from a disabled refrigeration unit, cleaning the refrigerant of contaminants, and converting the gaseous refrigerant to a liquid state for storage. It comprises a low pressure inlet section; a high pressure storage section; the low pressure inlet section comprising: an oil and refrigerant gas separator, including a separated oil removal means, first conduit means for connecting an inlet of the separator to the disabled refrigerant unit, a slack-sided accumulator, second conduit means connecting the separator to the slack-sided accumulator, a reclaim condenser, third conduit means connecting the separator and the reclaim condenser in series, an evaporator coil in the reclaim condenser connectable to a conventional operating refrigeration system for receiving a liquid refrigerant under pressure for expansion therein, the evaporator coil forming a condensing surface for condensing the refrigerant gas at near atmospheric pressure in the condenser, a liquid receiver, a reclaimed refrigerant storage tank, fourth conduit means further connecting the liquid receiver in series with the reclaim condenser, downstream thereof, means between the reclaim condenser and the liquid receiver.

  8. Proceedings: 2002 Workshop on Condensate Polishing

    SciTech Connect (OSTI)

    None

    2002-06-01T23:59:59.000Z

    Condensate polishing aims to control impurities in a nuclear power plant, thus allowing the unit to operate more reliably. This report contains the work presented at EPRI's 2002 Workshop on Condensate Polishing, where 36 papers were presented on current issues, research, and utility experiences involving polishing issues at both pressurized water reactor (PWR) and boiling water reactor (BWR) units.

  9. Gas condensate damage in hydraulically fractured wells

    E-Print Network [OSTI]

    Reza, Rostami Ravari

    2004-11-15T23:59:59.000Z

    of this research are a step forward in helping to improve the management of gas condensate reservoirs by understanding the mechanics of liquid build-up. It also provides methodology for quantifying the condensate damage that impairs linear flow of gas...

  10. Unusual condensates in quark and atomic systems

    E-Print Network [OSTI]

    B. Kerbikov

    2005-10-31T23:59:59.000Z

    In these lectures we discuss condensates which are formed in quark matter when it is squeezed and in a gas of fermionic atoms when it is cooled. The behavior of these two seemingly very different systems reveals striking similarities. In particular, in both systems the Bose-Einstein condensate to Bardeen--Cooper-Schrieffer (BEC-BCS) crossover takes place.

  11. Parallel Condensing System As A Heat Sink For Power Plants

    E-Print Network [OSTI]

    Akhtar, S. Z.

    Conventional heat sink technologies of use the condenser/cooling tower arrangement or an air cooled condenser for condensing exhaust steam from steam turbines. Each of these two systems have certain advantages as well as disadvantages. This paper...

  12. Adsorption modeling for off-gas treatment

    SciTech Connect (OSTI)

    Ladshaw, A.; Sharma, K.; Yiacoumi, S.; Tsouris, C. [Georgia Institute of Technology, Atlanta, GA 30332-0459 (United States); De Paoli, D.W. [Oak Ridge National Laboratory: Oak Ridge, TN 37831-6181 (United States)

    2013-07-01T23:59:59.000Z

    Off-gas generated from the reprocessing of used nuclear fuel contains a mixture of several radioactive gases including {sup 129}I{sub 2}, {sup 85}Kr, HTO, and {sup 14}CO{sub 2}. Over the past few decades, various separation and recovery processes have been studied for capturing these gases. Adsorption data for gaseous mixtures of species can be difficult to determine experimentally. Therefore, procedures capable of predicting the adsorption behavior of mixtures need to be developed from the individual isotherms of each of the pure species. A particular isotherm model of interest for the pure species is the Generalized Statistical Thermodynamic Adsorption isotherm. This model contains an adjustable number of parameters and will therefore describe a wide range of adsorption isotherms for a variety of components. A code has been developed in C++ to perform the non-linear regression analysis necessary for the determination of the isotherm parameters, as well as the least number of parameters needed to describe an entire set of data. (authors)

  13. OXYGEN ADSORPTION ON NITROGEN CONTAINING CARBON SURFACES

    E-Print Network [OSTI]

    Truong, Thanh N.

    OXYGEN ADSORPTION ON NITROGEN CONTAINING CARBON SURFACES Alejandro Montoya, Jorge O. Gil, Fanor-rich site of the carbon basal plane of graphite and then, it dissociates into oxygen atoms.1,2 Oxygen atoms at the edge of the carbon surface can form covalent bonds with oxygen. These sites can chemisorb

  14. Theoretical Study of Adsorption of Water Dimer on the Perfect MgO(100) Surface: Molecular Adsorption versus Dissociative Chemisorption

    E-Print Network [OSTI]

    Truong, Thanh N.

    Theoretical Study of Adsorption of Water Dimer on the Perfect MgO(100) Surface: Molecular Adsorption versus Dissociative Chemisorption Yan Wang and Thanh N. Truong* Henry Eyring Center on the mode of adsorption of the water dimer on the perfect MgO(100) surface using the ab initio embedded

  15. Condensation on Slippery Asymmetric Bumps

    E-Print Network [OSTI]

    Park, Kyoo-Chul; He, Neil; Aizenberg, Joanna

    2015-01-01T23:59:59.000Z

    Bumps are omnipresent from human skin to the geological structures on planets, which offer distinct advantages in numerous phenomena including structural color, drag reduction, and extreme wettability. Although the topographical parameters of bumps such as radius of curvature of convex regions significantly influence various phenomena including anti-reflective structures and contact time of impacting droplets, the effect of the detailed bump topography on growth and transport of condensates have not been clearly understood. Inspired by the millimetric bumps of the Namib Desert beetle, here we report the identified role of radius of curvature and width of bumps with homogeneous surface wettability in growth rate, coalescence and transport of water droplets. Further rational design of asymmetric convex topography and synergetic combination with slippery coating simultaneously enable self-transport, leading to unseen five-fold higher growth rate and an order of magnitude faster shedding time of droplets compared...

  16. New technology in condensate polishing

    SciTech Connect (OSTI)

    Kunin, R.; Salem, E.; Libutti, B. (Graver Co., Union, NJ (United States). Water Div.)

    1992-08-01T23:59:59.000Z

    Sulfonic acid ion exchange resins. when carried into a boiler or steam generator, thermally decompose releasing large amounts of corrosive, sulfates. Replacement of the sulfonic acid resin with a carboxylic acid resin would eliminate this source of contamination. The sulfonic acid resin is a strong acid: the carboxylic acid resin is a weak acid. The carboxylic acid resin alone is not capable of splitting salts which limits its use to mixed resin beds or to its use in single or individual beds with feeds of high alkalinity or high pH values. Laboratory, pilot plant and full scale plant tests compared the two resins in precoat filters. When the resins in mixed beds were in the acid form, the weakly acid resin was almost as effective in removing sodium ion as the strongly acid resin. In the ammonium form. the weakly acid resin was generally more effective in removing sodium than the strongly acid resin. Condensate polishing reduced the sodium ion to a few parts per billion (ppB). Complete resin separation before regeneration is more important for the weakly acid resin than for the strongly acid resin. Another development found that the hydrazine reaction with oxygen could be catalyzed by powdered activated carbon combined with microfibers on a Powdex substrate. The carbon should be thoroughly washed to reduce its residual sodium content. In plant tests, the carbon reduced the oxygen concentration in condensate about 50% during startup. In preliminary tests believed to be typical, carbon lowered the oxygen concentration below 10 ppB in about 6 hours compared to 18 hours without the carbon. Oxygen is also reduced during normal operation.

  17. aldol condensation reactions: Topics by E-print Network

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

    of the Bose-Einstein condensation mechanism for low-energy nuclear reaction (LENR) and transmutation processes in condensed matters. For the case of deutron-lithium...

  18. AP report no. 9675 The dynamics of H absorption in and adsorption on Cu(111)

    E-Print Network [OSTI]

    Persson, Mats

    the energy curves are in good agreement with available experimental data. We find that the calculated en; a simple estimation shows that the energy transfer to electron­hole pairs can be as efficient as the energy¨oteborg University, S­412 96, G¨oteborg, Sweden B. Hammer Center for Atomic­Scale Materials Physics and Physics

  19. Experimental testing of cooling by low pressure adsorption in a zeolite

    SciTech Connect (OSTI)

    Redman, C.M.

    1985-01-01T23:59:59.000Z

    A small scale facility was designed, constructed, and utilized to test the use of zeolite adsorption of water vapor to augment chill storage in ice for conventional space cooling. The facility uses solar-derived energy, for the heat source and evaporatively chilled water for the heat sump. The product cooling uses sublimation of ice instead of melting. The ZCAT facility utilizes a heat pumping technique in which a water vapor adsorbent functions as the compressor and condenser. The design was based on use of 13X zeolite as the adsorber because of its high adsorbence at low pressures. However, it has been determined that other materials such as silica gel should give superior performance. While zeolite 13X holds more water in the pressure and temperature ranges of interest, silica gel cycles more water and has less residue water. Both points are very important in the design of an efficient and cost effective system.

  20. The adsorption of water on Cu2O and Al2O3 thin films

    SciTech Connect (OSTI)

    Deng, Xingyi; Herranz, Tirma; Weis, Christoph; Bluhm, Hendrik; Salmeron, Miquel

    2008-06-27T23:59:59.000Z

    The initial stages of water condensation, approximately 6 molecular layers, on two oxide surfaces, Cu{sub 2}O and Al{sub 2}O{sub 3}, have been investigated by using ambient pressure X-ray photoelectron spectroscopy at relative humidity values (RH) from 0 to >90%. Water adsorbs first dissociatively on oxygen vacancies producing adsorbed hydroxyl groups in a stoichiometric reaction: O{sub lattic} + vacancies + H{sub 2}O = 2OH. The reaction is completed at {approx}1% RH and is followed by adsorption of molecular water. The thickness of the water film grows with increasing RH. The first monolayer is completed at {approx}15% RH on both oxides and is followed by a second layer at 35-40% RH. At 90% RH, about 6 layers of H{sub 2}O film have been formed on Al{sub 2}O{sub 3}.

  1. Bose-Einstein Condensate general relativistic stars

    E-Print Network [OSTI]

    P. H. Chavanis; T. Harko

    2011-08-19T23:59:59.000Z

    We analyze the possibility that due to their superfluid properties some compact astrophysical objects may contain a significant part of their matter in the form of a Bose-Einstein condensate. To study the condensate we use the Gross-Pitaevskii equation, with arbitrary non-linearity. By introducing the Madelung representation of the wave function, we formulate the dynamics of the system in terms of the continuity equation and of the hydrodynamic Euler equations. The non-relativistic and Newtonian Bose-Einstein gravitational condensate can be described as a gas, whose density and pressure are related by a barotropic equation of state. In the case of a condensate with quartic non-linearity, the equation of state is polytropic with index one. In the framework of the Thomas-Fermi approximation the structure of the Newtonian gravitational condensate is described by the Lane-Emden equation, which can be exactly solved. The case of the rotating condensate is also discussed. General relativistic configurations with quartic non-linearity are studied numerically with both non-relativistic and relativistic equations of state, and the maximum mass of the stable configuration is determined. Condensates with particle masses of the order of two neutron masses (Cooper pair) and scattering length of the order of 10-20 fm have maximum masses of the order of 2 M_sun, maximum central density of the order of 0.1-0.3 10^16 g/cm^3 and minimum radii in the range of 10-20 km. In this way we obtain a large class of stable astrophysical objects, whose basic astrophysical parameters (mass and radius) sensitively depend on the mass of the condensed particle, and on the scattering length. We also propose that the recently observed neutron stars with masses in the range of 2-2.4 M_sun are Bose-Einstein Condensate stars.

  2. 7, 71717233, 2007 Aerosol absorption

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    black carbon refractive indices, new cloud radiative properties considering the effect of aerosol absorption and radiative forcing. The effect of the usage of more accurate effective medium approximations radiative properties re- sults in a small global annual-mean all-sky absorption of 0.05 W m-2 and a positive

  3. Experimental signatures of cosmological neutrino condensation

    E-Print Network [OSTI]

    Mofazzal Azam; Jitesh R. Bhatt; Utpal Sarkar

    2010-11-02T23:59:59.000Z

    Superfluid condensation of neutrinos of cosmological origin at a low enough temperature can provide simple and elegant solution to the problems of neutrino oscillations and the accelerated expansion of the universe. It would give rise to a late time cosmological constant of small magnitude and also generate tiny Majorana masses for the neutrinos as observed from their flavor oscillations. We show that carefully prepared beta decay experiments in the laboratory would carry signatures of such a condensation, and thus, it would be possible to either establish or rule out neutrino condensation of cosmological scale in laboratory experiments.

  4. Dynamics of capillary condensation in aerogels

    SciTech Connect (OSTI)

    Nomura, R.; Miyashita, W.; Yoneyama, K.; Okuda, Y. [Department of Condensed Matter Physics, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8551 (Japan)

    2006-03-15T23:59:59.000Z

    Dynamics of capillary condensation of liquid {sup 4}He in various density silica aerogels was investigated systematically. Interfaces were clearly visible when bulk liquid was rapidly sucked into the aerogel. Time evolution of the interface positions was consistent with the Washburn model and their effective pore radii were obtained. Condensation was a single step in a dense aerogel and two steps in a low density aerogel. Crossover between the two types of condensation was observed in an intermediate density aerogel. Variety of the dynamics may be the manifestation of the fractal nature of aerogels which had a wide range of distribution of pore radii.

  5. Collecting and Using Condensate on Site

    E-Print Network [OSTI]

    Glawe, D.

    2013-01-01T23:59:59.000Z

    Antonio Condensate Collection and Use Manual for Commercial Buildings. Pending publication) ESL-KT-13-12-43 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 How Much Condensate? ESL-KT-13-12-43 CATEE 2013: Clean... Condensate Collection and Use Manual for Commercial Buildings. Pending publication) Measured Gallons 8 gpd per ton 0.3 gph per ton 0.1 gph per ton 0.6 gph per 1000 sq ft 0.5 gph per 1000 sq ft 10 gpd per 1000 sq ft 3 gpd per 1000 sq ft AWE Bryant & Ahmed...

  6. Rydberg excitation of Bose-Einstein condensates

    E-Print Network [OSTI]

    Rolf Heidemann; Ulrich Raitzsch; Vera Bendkowsky; Björn Butscher; Robert Löw; Tilman Pfau

    2007-10-30T23:59:59.000Z

    Rydberg atoms provide a wide range of possibilities to tailor interactions in a quantum gas. Here we report on Rydberg excitation of Bose-Einstein condensed 87Rb atoms. The Rydberg fraction was investigated for various excitation times and temperatures above and below the condensation temperature. The excitation is locally blocked by the van der Waals interaction between Rydberg atoms to a density-dependent limit. Therefore the abrupt change of the thermal atomic density distribution to the characteristic bimodal distribution upon condensation could be observed in the Rydberg fraction. The observed features are reproduced by a simulation based on local collective Rydberg excitations.

  7. QCD condensates in ADS/QCD

    E-Print Network [OSTI]

    Jacopo Bechi

    2009-09-25T23:59:59.000Z

    This paper focuses on some issues about condensates and renormalization in AdS/QCD models. In particular we consider the consistency of the AdS/QCD approach for scale dependent quantities as the chiral condensate questioned in some recent papers and the 4D meaning of the 5D cosmological constant in a model in which the QCD is dual to a 5D gravity theory. We will be able to give some arguments that the cosmological constant is related to the QCD gluon condensate.

  8. Optical absorption of silicon nanowires

    SciTech Connect (OSTI)

    Xu, T. [Key Laboratory of Advanced Display and System Application, Shanghai University, 149 Yanchang Road, Shanghai 200072 (China); Institut d'Electronique et de Microelectronique et de Nanotechnologies, IEMN (CNRS, UMR 8520), Groupe de Physique, Cite scientifique, avenue Poincare, 59652 Villeneuve d'Ascq (France); Lambert, Y.; Krzeminski, C.; Grandidier, B.; Stievenard, D.; Leveque, G.; Akjouj, A.; Pennec, Y.; Djafari-Rouhani, B. [Institut d'Electronique et de Microelectronique et de Nanotechnologies, IEMN (CNRS, UMR 8520), Groupe de Physique, Cite scientifique, avenue Poincare, 59652 Villeneuve d'Ascq (France)

    2012-08-01T23:59:59.000Z

    We report on simulations and measurements of the optical absorption of silicon nanowires (NWs) versus their diameter. We first address the simulation of the optical absorption based on two different theoretical methods: the first one, based on the Green function formalism, is useful to calculate the scattering and absorption properties of a single or a finite set of NWs. The second one, based on the finite difference time domain (FDTD) method, is well-adapted to deal with a periodic set of NWs. In both cases, an increase of the onset energy for the absorption is found with increasing diameter. Such effect is experimentally illustrated, when photoconductivity measurements are performed on single tapered Si nanowires connected between a set of several electrodes. An increase of the nanowire diameter reveals a spectral shift of the photocurrent intensity peak towards lower photon energies that allow to tune the absorption onset from the ultraviolet radiations to the visible light spectrum.

  9. Helium Adsorption in Silica Aerogel near the Liquid-Vapor Critical Point

    E-Print Network [OSTI]

    Tobias Herman; James Day; John Beamish

    2008-01-01T23:59:59.000Z

    We have investigated the adsorption and desorption of helium near its liquid-vapor critical point in silica aerogels with porosities between 95 % and 98%. We used a capacitive measurement technique which allowed us to probe the helium density inside the aerogel directly, even though the samples were surrounded by bulk helium. The aerogel’s very low thermal conductivity resulted in long equilibration times so we monitored the pressure and the helium density, both inside the aerogel and in the surrounding bulk, and waited at each point until all had stabilized. Our measurements were made at temperatures far from the critical point, where a well defined liquid-vapor interface exists, and at temperatures up to the bulk critical point. Hysteresis between adsorption and desorption isotherms persisted to temperatures close to the liquid-vapor critical point and there was no sign of an equilibrium liquid-vapor transition once the hysteresis disappeared. Many features of our isotherms can be described in terms of capillary condensation, although this picture becomes less applicable as the liquid-vapor critical point is approached and it is unclear how it can be applied to aerogels, whose tenuous structure includes a wide range of length scales. I.

  10. Helium adsorption in silica aerogel near the liquid-vapor critical point

    E-Print Network [OSTI]

    Tobias Herman; James Day; John Beamish

    2005-05-18T23:59:59.000Z

    We have investigated the adsorption and desorption of helium near its liquid-vapor critical point in silica aerogels with porosities between 95% and 98%. We used a capacitive measurement technique which allowed us to probe the helium density inside the aerogel directly, even though the samples were surrounded by bulk helium. The aerogel's very low thermal conductivity resulted in long equilibration times so we monitored the pressure and the helium density, both inside the aerogel and in the surrounding bulk, and waited at each point until all had stabilized. Our measurements were made at temperatures far from the critical point, where a well defined liquid-vapor interface exists, and at temperatures up to the bulk critical point. Hysteresis between adsorption and desorption isotherms persisted to temperatures close to the liquid-vapor critical point and there was no sign of an equilibrium liquid-vapor transition once the hysteresis disappeared. Many features of our isotherms can be described in terms of capillary condensation, although this picture becomes less applicable as the liquid-vapor critical point is approached and it is unclear how it can be applied to aerogels, whose tenuous structure includes a wide range of length scales.

  11. Eta absorption by mesons

    E-Print Network [OSTI]

    W. Liu; C. M. Ko; L. W. Chen

    2005-12-12T23:59:59.000Z

    Using the $[SU(3)_{\\mathrm{L}} \\times SU(3)_{\\mathrm{R}}]_{\\mathrm{global}% }\\times [SU(3)_V]_{\\mathrm{local}}$ chiral Lagrangian with hidden local symmetry, we evaluate the cross sections for the absorption of eta meson ($% \\eta$) by pion ($\\pi$), rho ($\\rho$), omega ($\\omega$), kaon ($K$), and kaon star ($K^*$) in the tree-level approximation. With empirical masses and coupling constants as well as reasonable values for the cutoff parameter in the form factors at interaction vertices, we find that most cross sections are less than 1 mb, except the reactions $\\rho\\eta\\to K\\bar K^*(\\bar KK^*)$, $\\omega\\eta\\to K\\bar K^*(\\bar KK^*)$, $K^*\\eta\\to\\rho K$, and $K^*\\eta\\to\\omega K$, which are a few mb, and the reactions $\\pi\\eta\\to K\\bar K$ and $K\\eta\\to\\pi K$, which are more than 10 mb. Including these reactions in a kinetic model based on a schematic hydrodynamic description of relativistic heavy ion collisions, we find that the abundance of eta mesons likely reaches chemical equilibrium with other hadrons in nuclear collisions at the Relativistic Heavy Ion Collider.

  12. Condensation on Slippery Asymmetric Bumps

    E-Print Network [OSTI]

    Kyoo-Chul Park; Philseok Kim; Neil He; Joanna Aizenberg

    2015-01-14T23:59:59.000Z

    Bumps are omnipresent from human skin to the geological structures on planets, which offer distinct advantages in numerous phenomena including structural color, drag reduction, and extreme wettability. Although the topographical parameters of bumps such as radius of curvature of convex regions significantly influence various phenomena including anti-reflective structures and contact time of impacting droplets, the effect of the detailed bump topography on growth and transport of condensates have not been clearly understood. Inspired by the millimetric bumps of the Namib Desert beetle, here we report the identified role of radius of curvature and width of bumps with homogeneous surface wettability in growth rate, coalescence and transport of water droplets. Further rational design of asymmetric convex topography and synergetic combination with slippery coating simultaneously enable self-transport, leading to unseen five-fold higher growth rate and an order of magnitude faster shedding time of droplets compared to superhydrophobic surfaces. We envision that our fundamental understanding and innovative design of bumps can be applied to lead enhanced performance in various phase change applications including water harvesting.

  13. Ice-condenser aerosol tests

    SciTech Connect (OSTI)

    Ligotke, M.W.; Eschbach, E.J.; Winegardner, W.K. (Pacific Northwest Lab., Richland, WA (United States))

    1991-09-01T23:59:59.000Z

    This report presents the results of an experimental investigation of aerosol particle transport and capture using a full-scale height and reduced-scale cross section test facility based on the design of the ice compartment of a pressurized water reactor (PWR) ice-condenser containment system. Results of 38 tests included thermal-hydraulic as well as aerosol particle data. Particle retention in the test section was greatly influenced by thermal-hydraulic and aerosol test parameters. Test-average decontamination factor (DF) ranged between 1.0 and 36 (retentions between {approximately}0 and 97.2%). The measured test-average particle retentions for tests without and with ice and steam ranged between DF = 1.0 and 2.2 and DF = 2.4 and 36, respectively. In order to apparent importance, parameters that caused particle retention in the test section in the presence of ice were steam mole fraction (SMF), noncondensible gas flow rate (residence time), particle solubility, and inlet particle size. Ice-basket section noncondensible flows greater than 0.1 m{sup 3}/s resulted in stable thermal stratification whereas flows less than 0.1 m{sup 3}/s resulted in thermal behavior termed meandering with frequent temperature crossovers between flow channels. 10 refs., 66 figs., 16 tabs.

  14. Oil removal from water via adsorption 

    E-Print Network [OSTI]

    Jacobs, William Edward

    1973-01-01T23:59:59.000Z

    . TABLE OF CONTENTS CHAPTER I. INTRODUCTION I I. LITERATURE REVIEW Significance of Oil Spill Proble. ". . s Growth of Marine Commerce Superport Oil Spills Oil Spills and the Law Oil Spill Control Methods Physical Removal of Oil III. MATERIALS... IV Table V Table VI Significant Facts about Major Oil Spills Viscosity of Test Oils Determined by Capillary Viscometer Percent of Oil Remaining in Water After Removal of Oil-Carrier Combination Maximum Oil Adsorption Capacity for Light Crude...

  15. Dropwise Condensation on Micro- and Nanostructured Surfaces

    E-Print Network [OSTI]

    Miljkovic, Nenad

    In this review we cover recent developments in the area of surface- enhanced dropwise condensation against the background of earlier work. The development of fabrication techniques to create surface structures at the micro- ...

  16. Cold condensation of dust in the ISM

    E-Print Network [OSTI]

    Rouillé, Gaël; Krasnokutski, Serge A; Krebsz, Melinda; Henning, Thomas

    2015-01-01T23:59:59.000Z

    The condensation of complex silicates with pyroxene and olivine composition at conditions prevailing in molecular clouds has been experimentally studied. For this purpose, molecular species comprising refractory elements were forced to accrete on cold substrates representing the cold surfaces of surviving dust grains in the interstellar medium. The efficient formation of amorphous and homogeneous magnesium iron silicates at temperatures of about 12 K has been monitored by IR spectroscopy. The gaseous precursors of such condensation processes in the interstellar medium are formed by erosion of dust grains in supernova shock waves. In the laboratory, we have evaporated glassy silicate dust analogs and embedded the released species in neon ice matrices that have been studied spectroscopically to identify the molecular precursors of the condensing solid silicates. A sound coincidence between the 10 micron band of the interstellar silicates and the 10 micron band of the low-temperature siliceous condensates can be...

  17. Quantum reflection of Bose-Einstein Condensates

    E-Print Network [OSTI]

    Pasquini, Thomas A., Jr

    2007-01-01T23:59:59.000Z

    Recent developments in atom optics have brought Bose-Einstein condensates within 1 pm of solid surfaces where the atom-surface interactions can no longer be ignored. At long- range, the atom-surface interaction is described ...

  18. Coherent decay of Bose-Einstein condensates

    E-Print Network [OSTI]

    Cragg, George E. (George Edwin), 1972-

    2006-01-01T23:59:59.000Z

    As the coldest form of matter known to exist, atomic Bose-Einstein condensates are unique forms of matter where the constituent atoms lose their individual identities, becoming absorbed into the cloud as a whole. Effectively, ...

  19. Condensation heat transfer on nanoengineered surfaces

    E-Print Network [OSTI]

    Paxson, Adam Taylor

    2011-01-01T23:59:59.000Z

    This thesis presents a series of three related studies with the aim of developing a surface that promotes robust dropwise condensation. Due to their remarkably low droplet adhesion, superhydrophobic surfaces were investigated ...

  20. Optimizing Steam & Condensate System: A Case Study 

    E-Print Network [OSTI]

    Venkatesan, V. V.; Norris, C.

    2011-01-01T23:59:59.000Z

    Optimization of Steam & Condensate systems in any process plant results in substantial reduction of purchased energy cost. During periods of natural gas price hikes, this would benefit the plant in controlling their fuel ...

  1. Particle mixing, flavor condensate and dark energy

    E-Print Network [OSTI]

    Massimo Blasone; Antonio Capolupo; Giuseppe Vitiello

    2009-12-08T23:59:59.000Z

    The mixing of neutrinos and quarks generate a vacuum condensate that, at the present epoch, behaves as a cosmological constant. The value of the dark energy is constrained today by the very small breaking of the Lorentz invariance.

  2. Modeling and Optimization of Superhydrophobic Condensation

    E-Print Network [OSTI]

    Miljkovic, Nenad

    Superhydrophobic micro/nanostructured surfaces for dropwise condensation have recently received significant attention due to their potential to enhance heat transfer performance by shedding water droplets via coalescence-induced ...

  3. Hierarchical superhydrophobic aluminum surfaces for condensation applications

    E-Print Network [OSTI]

    Lopez, Ken, S.B. Massachusetts Institute of Technology

    2012-01-01T23:59:59.000Z

    Many existing industrial systems, including thermal desalination plants and air conditioning systems, involve the process of condensation and are heavily dependent on this process for achieving adequate levels of energy ...

  4. Condensation heat transfer on superhydrophobic surfaces

    E-Print Network [OSTI]

    Miljkovic, Nenad

    Condensation is a phase change phenomenon often encountered in nature, as well as used in industry for applications including power generation, thermal management, desalination, and environmental control. For the past eight ...

  5. Advanced materials for enhanced condensation heat transfer

    E-Print Network [OSTI]

    Paxson, Adam Taylor

    2014-01-01T23:59:59.000Z

    This thesis investigates the use of three classes advanced materials for promoting dropwise condensation: 1. robust hydrophobic functionalizations 2. superhydrophobic textures 3. lubricant-imbibed textures We first define ...

  6. Measured Impacts of Air Conditioner Condenser Shading

    E-Print Network [OSTI]

    Parker, D. S.; Barkaszi, S. F.; Sonne, J. K.

    1996-01-01T23:59:59.000Z

    A study has been conducted by the Florida Solar Energy Center (FSEC) to examine if space cooling energy savings can be achieved from shading of residential air conditioning (AC) condenser units. The investigation consisted of before...

  7. Bose-Einstein Condensation (For the 9th

    E-Print Network [OSTI]

    Bose-Einstein Condensation (For the 9th Edition of the McGraw-Hill Encyclopedia of Science of bosonic particles is cooled below a critical temperature, it condenses into a Bose-Einstein condensate. Bose-Einstein condensation (BEC) is a phase-transition, which does not depend on the specific

  8. Cloud Condensation Nuclei (CCN) Analysis of Biogenic Secondary Organic Aerosol

    E-Print Network [OSTI]

    Collins, Gary S.

    Cloud Condensation Nuclei (CCN) Analysis of Biogenic Secondary Organic Aerosol Rachel L. Atlas1' gas-phase emissions and the aerosols they form (figure 6), including a cloud condensation nuclei Cloud condensation nuclei (CCN) are particles which water vapor condenses onto to form cloud droplets

  9. Mechanistic Modelling of Water Vapour Condensation in Presence of

    E-Print Network [OSTI]

    Haviland, David

    analysis of the water vapour condensation from the multicomponent mixture of condensable and noncondensable attention has been paid to the influence of the light gas and induced buoyancy forces on the condensation the multicomponent gas distribution and condensation heat transfer degradation are directly related

  10. Dropwise condensation on superhydrophobic surfaces with two-tier roughness

    E-Print Network [OSTI]

    Chen, Chuan-Hua

    Dropwise condensation on superhydrophobic surfaces with two-tier roughness Chuan-Hua Chen,a Qingjun condensation. Superhydrophobicity appears ideal to promote continued dropwise condensation which requires rapid. This letter reports continuous dropwise condensation on a superhydrophobic surface with short carbon nanotubes

  11. Colliding and Moving Bose-Einstein Condensates: Studies of superfluidity and optical tweezers for condensate transport

    E-Print Network [OSTI]

    Chikkatur, Ananth P.

    2006-02-22T23:59:59.000Z

    In this thesis, two different sets of experiments are described. The first is an exploration of the microscopic superfluidity of dilute gaseous Bose- Einstein condensates. The second set

  12. Quark condensates and the deconfinement transition

    E-Print Network [OSTI]

    Christian S. Fischer; Jens A. Mueller

    2009-08-18T23:59:59.000Z

    In this talk we present results on the chiral and the deconfinement transition of quenched QCD from Dyson-Schwinger equations. We determine the ordinary quark condensate signaling the chiral transition and the dual quark condensate signaling the deconfinement transition from the Landau gauge quark propagator evaluated at generalized boundary conditions. We find only slightly different transition temperatures at finite quark masses, whereas the transition temperatures coincide in the chiral limit.

  13. Proceedings: 2003 EPRI Workshop on Condensate Polishing

    SciTech Connect (OSTI)

    None

    2004-02-01T23:59:59.000Z

    Successful condensate polishing operations maintain control of ionic and particulate impurity transport to the pressurized water reactor (PWR) steam generator and the boiling water reactor (BWR) reactor and recirculation system, thus allowing the units to operate more reliably. This report contains the work presented at EPRI's 2003 Workshop on Condensate Polishing, where 30 papers were presented on current issues, research, and utility experiences involving polishing issues at both PWR and BWR units.

  14. High Efficiency Adsorption Chillers: High Efficiency Adsorption Cooling Using Metal Organic Heat Carriers

    SciTech Connect (OSTI)

    None

    2010-10-01T23:59:59.000Z

    BEETIT Project: PNNL is incorporating significant improvements in materials that adsorb liquids or gases to design more efficient adsorption chillers. An adsorption chiller is a type of air conditioner that is powered by heat, solar or waste heat, or combustion of natural gas. Unlike typical chillers, this type has few moving parts and uses almost no electricity to operate. PNNL is designing adsorbent materials at the molecular level with at least 3 times higher refrigerant capacity and up to 20 times faster kinetics than adsorbents used in current chillers. By using the new adsorbent, PNNL is able to create a chiller that is significantly smaller, has twice the energy efficiency, and lower costs for materials and assembly time compared to conventional adsorption chillers.

  15. Transport of Bose-Einstein Condensates with Optical Tweezers Conventional condensate production techniques severely limit optical and mechanical

    E-Print Network [OSTI]

    Transport of Bose-Einstein Condensates with Optical Tweezers Conventional condensate production to manipulate and study condensates has been a major restriction to previous experiments. So far, most experiments were carried out within a few millimeters of where the condensate was created. What is highly

  16. Zinc Adsorption Effects on Arsenite Oxidation Kinetics at the

    E-Print Network [OSTI]

    Sparks, Donald L.

    Zinc Adsorption Effects on Arsenite Oxidation Kinetics at the Birnessite-Water Interface L A U R), directly oxidized As(III). However, these studies did not explore the role that cation adsorption has on As at the birnessite-water interface were investigated using batch adsorption experiments (0.1 g L-1; pH 4.5 and 6.0; I

  17. adsorption chromatographic processes: Topics by E-print Network

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

    with direct numerical simulations, and we further study the dynamic scaling law on fractal surfaces. The adsorption-diffusion process obeys the fracton dynamics on the fractal...

  18. Adsorption of Amelogenin onto Self-Assembled and Fluoroapatite...

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

    Amelogenin onto Self-Assembled and Fluoroapatite Surfaces. Adsorption of Amelogenin onto Self-Assembled and Fluoroapatite Surfaces. Abstract: Abstract. The interactions of proteins...

  19. Determining Individual Mineral Contributions To U(VI) Adsorption...

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

    Individual Mineral Contributions To U(VI) Adsorption In A Contaminated Aquifer Sediment: A Fluorescence Spectroscopy Determining Individual Mineral Contributions To U(VI)...

  20. Adsorption, Desorption, and Diffusion of Nitrogen in a Model...

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

    I. Surface Limited Desorption Kinetics in Adsorption, Desorption, and Diffusion of Nitrogen in a Model Nanoporous Material: I. Surface Limited Desorption Kinetics in Abstract: The...

  1. Adsorption of Water Monomer and Clusters on Platinum(111) Terrace...

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

    Platinum(111) Terrace and Related Steps and Kinks I. Configurations, Energies, and Adsorption of Water Monomer and Clusters on Platinum(111) Terrace and Related Steps and Kinks...

  2. Adsorption, Desorption, and Diffusion of Nitrogen in a Model...

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

    II. Diffusion Limited Kinetics in Amorphous Adsorption, Desorption, and Diffusion of Nitrogen in a Model Nanoporous Material: II. Diffusion Limited Kinetics in Amorphous Abstract:...

  3. adsorption mtsa subassembly: Topics by E-print Network

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

    (more) Beckner, Matt 2012-01-01 108 Adsorption of trace steroid estrogens to hydrophobic hollow fibre membranes Edinburgh, University of - Research Archive Summary: This paper...

  4. adsorption influencia del: Topics by E-print Network

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

    - Research Archive Summary: This paper discusses adsorption of estrone to microfiltration hollow fibre membrane from aqueous phase using estrone as the model compounds. The...

  5. adsorption chromatographic xad: Topics by E-print Network

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

    (more) Beckner, Matt 2012-01-01 132 Adsorption of trace steroid estrogens to hydrophobic hollow fibre membranes Edinburgh, University of - Research Archive Summary: This paper...

  6. ammonium 12-molybdophosphate adsorption: Topics by E-print Network

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

    (more) Beckner, Matt 2012-01-01 182 Adsorption of trace steroid estrogens to hydrophobic hollow fibre membranes Edinburgh, University of - Research Archive Summary: This paper...

  7. adsorption chromatography columns: Topics by E-print Network

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

    conformation and to the results for polymers at flat and energetically homogeneous surfaces. The disorder-induced enhancement of adsorption is confirmed and is shown to be...

  8. The effect of condensate dropout on pressure transient analysis of a high-pressure gas condensate well

    E-Print Network [OSTI]

    Briens, Frederic Jean-Louis

    1986-01-01T23:59:59.000Z

    of drawdown or buildup tests, the formation permeability can be estimated. Although these conventional techniques have been successfully applied to 'dry' gas well analysis, they have not been extended to high-pressure gas condensate wells. The application... Condensate Reser voir Data. . 43 Elf Aquitaine Gas Condensate Reservoir Fluid Composition Elf Aquitaine Gas Condensate Well Production Test Data. Drawdown Test F1 of Elf Aquitaine Gas Condensate Mell 45 46 Drawdown Test F2 of Elf Aquitaine Gas...

  9. Enhanced tubes for steam condensers. Volume 1, Summary of condensation and fouling; Volume 2, Detailed study of steam condensation

    SciTech Connect (OSTI)

    Webb, R.L.; Chamra, L.; Jaber, H.

    1992-02-01T23:59:59.000Z

    Electric utility steam condensers typically use plain tubes made of titanium, stainless steel, or copper alloys. Approximately two-thirds of the total thermal resistance is on the water side of the plain tube. This program seeks to conceive and develop a tube geometry that has special enhancement geometries on the tube (water) side and the steam (shell) side. This ``enhanced`` tube geometry, will provide increased heat transfer coefficients. The enhanced tubes will allow the steam to condense at a lower temperature. The reduced condensing temperature will reduce the turbine heat rate, and increase the plant peak load capability. Water side fouling and fouling control is a very important consideration affecting the choice of the tube side enhancement. Hence, we have consciously considered fouling potential in our selection of the tube side surface geometry. Using appropriate correlations and theoretical models, we have designed condensation and water side surface geometries that will provide high performance and be cleanable using sponge ball cleaning. Commercial tube manufacturers have made the required tube geometries for test purposes. The heat transfer test program includes measurement of the condensation and water side heat transfer coefficients. Fouling tests are being run to measure the waterside fouling resistance, and to the test the ability of the sponge ball cleaning system to clean the tubes.

  10. Instability of condensate lm and capillary blocking in small-diameter-thermosyphon condensers

    E-Print Network [OSTI]

    Zhao, Tianshou

    . Teng, P. Cheng*, T.S. Zhao Department of Mechanical Engineering, The Hong Kong University of Science, such as air-conditioning, refriger- ation, and heat-pipe condensers, etc. The concurrent two be encountered in both concurrent and countercurrent condensers. In large-diameter (either concurrent

  11. Roll Wave Effects on Annular Condensing Heat Transfer in Horizontal PCCS Condenser Tube

    SciTech Connect (OSTI)

    Masaya Kondo; Hideo Nakamura; Yoshinari Anoda [Japan Atomic Energy Research Institute, Tokai-mura 319-1195 (Japan); Sadanori Saishu; Hiroyuki Obata; Rumi Shimada [Japan Atomic Power Company (Japan); Shinichi Kawamura [Tokyo Electric Power Company, Incorporated, 1-3, Uchisaiwai-cho 1-chome, Chiyoda-ku, Tokyo, 1008560 (Japan)

    2002-07-01T23:59:59.000Z

    A horizontal in-tube condensation heat exchanger is under investigation to be used for a passive containment cooling system (PCCS) of a next generation-type BWR. The flow conditions in the horizontal condenser tube were observed both visually and by local void fraction fluctuation. The observed flow regimes at a rated condition were annular flow at the tube inlet, and turned gradually into wavy flow and smooth stratified flow along the length of the tube. It was found further that frequency of the roll waves that appear on the liquid film in the annular flow is closely related to the measured local condensation heat transfer coefficient. Based on the flow observation, the roll wave frequency and measured condensation heat transfer coefficient, a model is proposed which predicts the condensation heat transfer coefficient particularly for annular flows around the tube inlet region. The proposed heat transfer model predicts well the influences of pressure, local gas-phase velocity and film thickness. (authors)

  12. Adsorption characteristics of alkanes onto carbon nanotube bundles: Grand Canonical Monte Carlo simulation

    E-Print Network [OSTI]

    Maruyama, Shigeo

    Adsorption characteristics of alkanes onto carbon nanotube bundles: Grand Canonical Monte Carlo alkane adsorption and separation. Rather than remaining isolated however, nanotubes tend to bundle together, and the adsorption properties of such bundles and subsequent potential for practical alkane

  13. The adsorption of water on Cu2O and Al2O3 thin films

    E-Print Network [OSTI]

    Deng, Xingyi

    2010-01-01T23:59:59.000Z

    since in equilibrium adsorption and desorption rates are theexp(-E a /RT), while the gas adsorption rate depends on theThe adsorption of water on Cu 2 O and Al 2 O 3 thin films

  14. Water Adsorption, Desorption, and Clustering on FeO(111). | EMSL

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

    Adsorption, Desorption, and Clustering on FeO(111). Water Adsorption, Desorption, and Clustering on FeO(111). Abstract: The adsorption of water on FeO(111) is investigated using...

  15. Mechanism of Preferential Adsorption of SO2 into Two Microporous Paddle Wheel Frameworks M(bdc)(ted)(0.5)

    SciTech Connect (OSTI)

    Tan, Kui; Canepa, Pieremanuele; Gong, Qihan; Liu, Jian; Johnson, Daniel H.; Dyevoich, Allison A.; Thallapally, Praveen K.; Thonhauser, Timo; Li, Jing; Chabal, Y. J.

    2013-12-02T23:59:59.000Z

    The adsorption of a corrosive gas, SO¬2, into microporous pillared paddle-wheel frameworks M(bdc)(ted)0.5 [M = Ni, , Zn; bdc = 1,4-benzenedicarboxylate; ted=triethylenediamine] is studied by volumetric adsorption measurements and a combination of in-situ infrared spectroscopy and ab initio density functional theory (DFT) calculations. The uptake of SO2 in M(bdc)(ted)0.5 at room temperature is quite significant, 9.966 mol kg-1(63.8%) at room temperature/1.132 bar, which represents the highest SO2 uptake so far observed. Two different adsorption species are identified by infrared spectroscopy: one is typical physisorbed SO2 species, charac-terized by a modest red shift of S-O stretching bands (36 cm-1 for ?as and 7 cm-1 for ?s); the other characterized by adsorption bands at 1242 and 1105cm-1 and by a much higher (~150?C) temperature to completely remove. Theoretical calculations including van der Waals interactions (based on vdW-DF) indicate that the adsorption geometry of SO2 involves one molecule bonding of its sulfur atom to the oxygen atom of the paddle-wheel building unit and its two oxygen atoms to the C-H groups of the organic linkers by formation of hydrogen bonds. Such a configuration results in a large distortion of benzene rings, which is consistent with the experimentally observed shift of the ring deformation mode. The simulated frequency shift of the SO2 stretching bands by vdW-DF is in excellent agreement with spectroscopically measured value of physisorbed SO2. The IR absorptions at 1242 and 1105 cm-1 also suggest a stronger adsorption configuration, previously observed in SO4-like species involving two oxygen atoms of the paddle wheel building units. The adsorption configurations of SO2 into M(bdc)(ted)0.5 derived by infrared spectroscopy and vdW-DF calculations provide the understanding necessary to develop industrial processes for SO2 removal using microporous paddle-wheel frameworks materials.

  16. Explorations of Magnetic Phases in F = 1 87Rb Spinor Condensates

    E-Print Network [OSTI]

    Guzman, Jennie Sara

    2012-01-01T23:59:59.000Z

    5 Equilibrium Properties of Spinor Condensates 5.1 SpinorThe condensate axes as compared to the geographicalTemporal evolution of condensate fractions for ? = 0 and ? =

  17. Bosonic condensation in a flat energy band

    E-Print Network [OSTI]

    Baboux, F; Jacqmin, T; Biondi, M; Lemaître, A; Gratiet, L Le; Sagnes, I; Schmidt, S; Türeci, H E; Amo, A; Bloch, J

    2015-01-01T23:59:59.000Z

    Flat bands are non-dispersive energy bands made of fully degenerate quantum states. Such bands are expected to support emergent phenomena with extraordinary spatial and temporal structures, as they strongly enhance the effect of any perturbation induced by disorder, dissipation or interactions. However, flat bands usually appear at energies above the ground state, preventing their study in systems in thermodynamic equilibrium. Here we use cavity polaritons to circumvent this issue. We engineer a flat band in a frustrated lattice of micro-pillar optical cavities. By taking advantage of the non-hermiticity of our system, we achieve for the first time bosonic condensation in a flat band. This allows revealing the peculiar effect of disorder in such band: The condensate fragments into highly localized modes, reflecting the elementary eigenstates produced by geometric frustration. This non-hermitian engineering of a bosonic flat band condensate offers a novel approach to studying coherent phases of light and matte...

  18. Preoperational test report, recirculation condenser cooling systems

    SciTech Connect (OSTI)

    Clifton, F.T.

    1997-11-04T23:59:59.000Z

    This represents a preoperational test report for Recirculation Condenser Systems, Project W-030. Project W-030 provides a ventilation upgrade for the four Aging Waste Facility tanks. The four system provide condenser cooling water for vapor space cooling of tanks AY1O1, AY102, AZ1O1, AZ102. Each system consists of a valved piping loop, a pair of redundant recirculation pumps, a closed-loop evaporative cooling tower, and supporting instrumentation; equipment is located outside the farm on concrete slabs. Piping is routed to the each ventilation condenser inside the farm via below-grade concrete trenches. The tests verify correct system operation and correct indications displayed by the central Monitor and Control System.

  19. Boson stars: Chemical potential and quark condensates

    E-Print Network [OSTI]

    Jitesh R. Bhatt; V. Sreekanth

    2010-05-06T23:59:59.000Z

    We study the properties of a star made of self-gravitating bosons gas in a mean-field approximation. A generalized set of Tolman-Oppenheimer-Volkov(TOV) equations is derived to incorporate the effect of chemical-potential in the general relativistic frame work. The metric-dependence of the chemical-potential gives a new class of solutions for the boson stars. It is demonstrated that the maximum mass and radius of the star change in a significant way when the effect of finite chemical-potential is considered. We also discuss the case of a boson star made of quark-condensates. It is found that when the self-interaction between the condensates is small as compared to their mass, the typical density is too high to form a diquark-boson star. Our results indicate that the star of quark-condensate may be formed in a low-density and high-pressure regime.

  20. Bose-Einstein Condensation on Holographic Screens

    E-Print Network [OSTI]

    Mirza, Behrouz; Raissi, Zahra

    2011-01-01T23:59:59.000Z

    We consider a boson gas on holographic screens of the Rindler and Schwartzschild spacetimes. It is shown that the gas on the stretched horizon is in a Bose-Einstein condensed state with the Hawking temperature $T_c=T_H$ if the particle number of the system be equal to the number of quantum bits of spacetime $ N \\simeq {A}/{{\\l_{p}}^{2}}$. A boson gas on a holographic screen $(r>2M)$ with the same number of particles and at Unruh temperature is also in a condensed state. Far from the horizon, the Unruh temperature is much lower than the condensation temperature $(T_c=T_{{Unruh}}+\\sqrt {f(r)} T_{Planck})$. This analysis implies a possible physical model for quantum bits of spacetime on a holographic screen. We propose a unique and physical interpretation for equipartition theorem on holographic screens. Also, we will argue that this gas is a fast scrambler.

  1. A Simple Method for the Prevention of Non-Specific Adsorption...

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

    Method for the Prevention of Non-Specific Adsorption by Nanocrystals onto Surfaces. A Simple Method for the Prevention of Non-Specific Adsorption by Nanocrystals onto Surfaces....

  2. Tetraoxygen on Reduced Ti02(110): Oxygen Adsorption and Reactions...

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

    Tetraoxygen on Reduced Ti02(110): Oxygen Adsorption and Reactions with Oxygen Vacancies. Tetraoxygen on Reduced Ti02(110): Oxygen Adsorption and Reactions with Oxygen Vacancies....

  3. E-Print Network 3.0 - adsorption flotation utilizing Sample Search...

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

    Adsorption Properties of Palladium-Cobalt-Based Cyanogels Summary: fractality of the aerogels, two independent techniques were utilized: nitrogen adsorption at 77 K and small......

  4. Mechanisms of Selenate Adsorption on Iron Oxides and Hydroxides

    E-Print Network [OSTI]

    Sparks, Donald L.

    - bonding mechanisms on hematite, goethite, and hydrous ferric oxide (HFO). It was learned that selenate-sphere surface complexes on goethite and HFO. This continuum of adsorption mechanisms is strongly affected for thesurfaceandimpliesthatthesamemechanismsarepresent in both systems. Zhang and Sparks (1) analyzed selenate adsorption on goethite using a triple

  5. Adsorption, desorption, and stabilization of arsenic on aluminum substituted ferrihydrite 

    E-Print Network [OSTI]

    Masue, Yoko

    2006-04-12T23:59:59.000Z

    by Langmuir and Freundlich equations. Adsorption maxima of AsV on Fe and Al:Fe hydroxides were observed at pH 3 to 7, and that of AsV on Al hydroxide was observed at pH 5.2, with significant decreases in adsorption with increase and decrease in pH...

  6. Transient absorption spectroscopy of laser shocked explosives

    SciTech Connect (OSTI)

    Mcgrane, Shawn D [Los Alamos National Laboratory; Dang, Nhan C [Los Alamos National Laboratory; Whitley, Von H [Los Alamos National Laboratory; Bolome, Cindy A [Los Alamos National Laboratory; Moore, D S [Los Alamos National Laboratory

    2010-01-01T23:59:59.000Z

    Transient absorption spectra from 390-890 nm of laser shocked RDX, PETN, sapphire, and polyvinylnitrate (PVN) at sub-nanosecond time scales are reported. RDX shows a nearly linear increase in absorption with time after shock at {approx}23 GPa. PETN is similar, but with smaller total absorption. A broad visible absorption in sapphire begins nearly immediately upon shock loading but does not build over time. PVN exhibits thin film interference in the absorption spectra along with increased absorption with time. The absorptions in RDX and PETN are suggested to originate in chemical reactions happening on picosecond time scales at these shock stresses, although further diagnostics are required to prove this interpretation.

  7. Adsorption of polymer chains at penetrable interfaces

    SciTech Connect (OSTI)

    Gerasimchuk, I. V., E-mail: igor.gera@gmail.com [National Academy of Sciences of Ukraine and Ministry of Education and Science of Ukraine, Institute of Magnetism (Ukraine); Sommer, J.-U. [Leibniz Institute of Polymer Research Dresden e.V. (Germany); Gerasimchuk, V. S. [National Technical University of Ukraine 'Kyiv Polytechnic Institute' (Ukraine)

    2011-03-15T23:59:59.000Z

    We investigate the problem of adsorption (localization) of polymer chains in the system of two penetrable interfaces within the mean-field approximation. The saturation of the polymer system in the limit case of zero bulk concentration is studied. We find the exact solution of this mean-field polymer adsorption problem that opens the possibility to treat various localization problems for polymer chains in such environments using appropriate boundary conditions. The exact solution is controlled by a single scaling variable that describes the coupling between the interfaces due to the polymer chains. We obtain a nonmonotonic behavior of the amount of adsorbed polymers as a function of the distance between the interfaces. This leads to a high-energy and a low-energy phase for the double layer with respect to the amount of polymers localized. At the saturation point, we find the total energy of the system and determine the force acting between the interfaces to be strictly attractive and to monotonically decay to zero when the interface distance increases.

  8. Condenser optic with sacrificial reflective surface

    DOE Patents [OSTI]

    Tichenor, Daniel A.; Kubiak, Glenn D.; Lee, Sang Hun

    2006-07-25T23:59:59.000Z

    Employing collector optics that have a sacrificial reflective surface can significantly prolong the useful life of the collector optics and the overall performance of the condenser in which the collector optics are incorporated. The collector optics are normally subject to erosion by debris from laser plasma source of radiation. The presence of an upper sacrificial reflective surface over the underlying reflective surface effectively increases the life of the optics while relaxing the constraints on the radiation source. Spatial and temporally varying reflectivity that results from the use of the sacrificial reflective surface can be accommodated by proper condenser design.

  9. Condenser optic with sacrificial reflective surface

    DOE Patents [OSTI]

    Tichenor, Daniel A. (Castro Valley, CA); Kubiak, Glenn D. (Livermore, CA); Lee, Sung Hun (Sunnyvale, CA)

    2007-07-03T23:59:59.000Z

    Employing collector optics that has a sacrificial reflective surface can significantly prolong the useful life of the collector optics and the overall performance of the condenser in which the collector optics are incorporated. The collector optics is normally subject to erosion by debris from laser plasma source of radiation. The presence of an upper sacrificial reflective surface over the underlying reflective surface effectively increases the life of the optics while relaxing the constraints on the radiation source. Spatial and temporally varying reflectivity that results from the use of the sacrificial reflective surface can be accommodated by proper condenser design.

  10. Colored condensates deep inside neutron stars

    E-Print Network [OSTI]

    David Blaschke

    2014-07-28T23:59:59.000Z

    It is demonstrated how in the absence of solutions for QCD under conditions deep inside compact stars an equation of state can be obtained within a model that is built on the basic symmetries of the QCD Lagrangian, in particular chiral symmetry and color symmetry. While in the vacuum the chiral symmetry is spontaneously broken, it gets restored at high densities. Color symmetry, however, gets broken simultaneously by the formation of colorful diquark condensates. It is shown that a strong diquark condensate in cold dense quark matter is essential for supporting the possibility that such states could exist in the recently observed pulsars with masses of 2 $M_\\odot$.

  11. Bulk viscosity in kaon condensed matter

    E-Print Network [OSTI]

    Debarati Chatterjee; Debades Bandyopadhyay

    2007-05-30T23:59:59.000Z

    We investigate the effect of $K^-$ condensed matter on bulk viscosity and r-mode instability in neutron stars. The bulk viscosity coefficient due to the non-leptonic process $n \\rightleftharpoons p + K^-$ is studied here. In this connection, equations of state are constructed within the framework of relativistic field theoretical models where nucleon-nucleon and kaon-nucleon interactions are mediated by the exchange of scalar and vector mesons. We find that the bulk viscosity coefficient due to the non-leptonic weak process in the condensate is suppressed by several orders of magnitude. Consequently, kaon bulk viscosity may not damp the r-mode instability in neutron stars.

  12. Spontaneous Supersymmetry Breaking Induced by Vacuum Condensates

    E-Print Network [OSTI]

    Antonio Capolupo; Marco Di Mauro

    2012-08-29T23:59:59.000Z

    We propose a novel mechanism of spontaneous supersymmetry breaking which relies upon an ubiquitous feature of Quantum Field Theory, vacuum condensates. Such condensates play a crucial r\\^{o}le in many phenomena. Examples include Unruh effect, superconductors, particle mixing, and quantum dissipative systems. We argue that in all these phenomena supersymmetry, when present, is spontaneously broken. Evidence for our conjecture is given for the Wess--Zumino model, that can be considered an approximation to the supersymmetric extensions of the above mentioned systems. The magnitude of the effect is estimated for a recently proposed experimental setup based on an optical lattice.

  13. Polarization-Bound Quasi-Continuum States Are Responsible for the "Blue Tail" in the Optical Absorption Spectrum of the Aqueous Electron

    E-Print Network [OSTI]

    Herbert, John

    electron localization in polar condensed media as well as biological radiation damage arising from chemistry might play a prominent role in biological radiation damage, alongside the more familiar oxidative of excited states of e- (aq) in radiation chemistry and in view of the fact that the optical absorption

  14. High capacity adsorption media and method of producing

    DOE Patents [OSTI]

    Tranter, Troy J. (Idaho Falls, ID); Mann, Nicholas R. (Blackfoot, ID); Todd, Terry A. (Aberdeen, ID); Herbst, Ronald S. (Idaho Falls, ID)

    2010-10-05T23:59:59.000Z

    A method of producing an adsorption medium to remove at least one constituent from a feed stream. The method comprises dissolving and/or suspending at least one metal compound in a solvent to form a metal solution, dissolving polyacrylonitrile into the metal solution to form a PAN-metal solution, and depositing the PAN-metal solution into a quenching bath to produce the adsorption medium. The at least one constituent, such as arsenic, selenium, or antimony, is removed from the feed stream by passing the feed stream through the adsorption medium. An adsorption medium having an increased metal loading and increased capacity for arresting the at least one constituent to be removed is also disclosed. The adsorption medium includes a polyacrylonitrile matrix and at least one metal hydroxide incorporated into the polyacrylonitrile matrix.

  15. CO{sub 2} adsorption: Experimental investigation with kinetics verification and CFD reactor model validation

    SciTech Connect (OSTI)

    Breault, Ronald W, [U.S. DOE; Huckaby, Ernest D. [U.S. DOE; Shadle, Lawrence J [U.S. DOE; Spenik, James L. [REM Engineering PLLC

    2013-01-01T23:59:59.000Z

    The National Energy Technology Laboratory is investigating a new process for CO{sub 2} capture from large sources such as utility power generation facilities as an alternative to liquid amine based absorption processes. Many, but not all of these advanced dry processes are based upon sorbents composed of supported polyamines. In this analysis, experiments have been conducted in a small facility at different temperatures and compared to CFD reactor predictions using kinetics obtained from TGA tests. This particular investigation compares the predicted performance and the experimental performance of one of these new class of sorbents in a fluidized bed reactor. In the experiment, the sorbent absorbs CO{sub 2} from simulated flue gas in a riser reactor, separates the carbonated particles from the de-carbonated flue gas in a cyclone and then regenerates the sorbent, creating a concentrated stream of pure CO{sub 2} for sequestration. In this work, experimental measurements of adsorption are compared to predictions from a 3-dimensional non-isothermal reacting multiphase flow model. The effects of the gas flow rate and reactor temperature are explored. It is shown that the time duration for CO{sub 2} adsorption decreased for an increase in the gas flow. The details of the experimental facility and the model as well as the comparative analysis between the data and the simulation results are discussed.

  16. Enhancing Condensers for Geothermal Systems: the Effect of High Contact Angles on Dropwise Condensation Heat Transfer

    SciTech Connect (OSTI)

    Kennedy, John M.; Kim, Sunwoo; Kim, Kwang J.

    2009-10-06T23:59:59.000Z

    Phase change heat transfer is notorious for increasing the irreversibility of, and therefore decreasing the efficiency of, geothermal power plants. Its significant contribution to the overall irreversibility of the plant makes it the most important source of inefficiency in the process. Recent studies here have shown the promotion of drop wise condensation in the lab by means of increasing the surface energy density of a tube with nanotechnology. The use of nanotechnology has allowed the creation of surface treatments which discourage water from wetting a tube surface during a static test. These surface treatments are unique in that they create high- contact angles on the condensing tube surfaces to promote drop wise condensation.

  17. Selenite Adsorption Mechanisms on Pure and Coated Montmorillonite: An EXAFS and XANES Spectroscopic Study

    SciTech Connect (OSTI)

    Peak, Derek; Saha, U.K.; Huang, P.M. (Saskatchewan)

    2008-06-09T23:59:59.000Z

    Selenite (SeO{sub 3}{sup 2-}) is an oxyanion of environmental importance due to its toxicity to animals at higher concentrations, notably waterfowl and grazing animals. Sorption of SeO{sub 3}{sup 2-} with mineral phases typically controls the movement and bioaccessibility of SeO{sub 3}{sup 2-} in soils and sediments. Previous studies have successfully utilized synchrotron-based Extended X-ray Absorption Fine Structure (EXAFS) and X-ray Absorption Near Edge Structure (XANES) spectroscopy to determine SeO{sub 3}{sup 2-} bonding mechanisms on Fe and Mn oxides, but the direct evidence of SeO{sub 3}{sup 2-} surface complexation mechanisms on important mineral phases such as Al hydroxide and aluminosilicate minerals is still lacking. In this study both EXAFS and XANES spectroscopy was conducted on aqueous SeO{sub 3}{sup 2-} solutions and on a variety of Al-bearing sorption samples at pH 4.5. The sorbents chosen were a hydroxyaluminosilicate (HAS) polymer, a hydroxyaluminum (HYA) polymer, montmorillonite, and both HYA and HAS coated montmorillonite. For SeO{sub 3}{sup 2-} sorption on montmorillonite, only bidentate binuclear inner-sphere complexation was observed. For the hydroxyaluminum and hydroxyaluminosilicate polymers, a mixture of outer-sphere and bidentate binuclear inner-sphere was observed. When montmorillonite was coated with either HYA or HAS polymers then adsorption behavior was intermediate between that of the mineral and the pure polymer. Since temperate soils often contain aluminum-hydroxy and aluminosilicate coated minerals rather than discrete Al hydroxide minerals and pristine clay surfaces, the adsorption mechanisms observed on these coated surfaces are more realistic of the natural environment than sorption on pure minerals.

  18. Absorption-heat-pump system

    DOE Patents [OSTI]

    Grossman, G.; Perez-Blanco, H.

    1983-06-16T23:59:59.000Z

    An improvement in an absorption heat pump cycle is obtained by adding adiabatic absorption and desorption steps to the absorber and desorber of the system. The adiabatic processes make it possible to obtain the highest temperature in the absorber before any heat is removed from it and the lowest temperature in the desorber before heat is added to it, allowing for efficient utilization of the thermodynamic availability of the heat supply stream. The improved system can operate with a larger difference between high and low working fluid concentrations, less circulation losses, and more efficient heat exchange than a conventional system.

  19. Quasistellar Objects: Intervening Absorption Lines

    E-Print Network [OSTI]

    Jane C. Charlton; Christopher W. Churchill

    2000-05-31T23:59:59.000Z

    We briefly review, at a level appropriate for graduate students and non-specialists, the field of quasar absorption lines (QALs). Emphasis is on the intervening absorbers. We present the anatomy of a quasar spectrum due to various classes of intervening absorption systems, and a brief historical review of each absorber class (Lyman-alpha forest and Lyman limit systems, and metal-line and damped Lyman-alpha absorbers). We also provide several heuristic examples on how the physical properties of both the intergalactic medium and the gaseous environments associated with earlier epoch galaxies can be inferred from QALs. The evolution of these environments from z=4 are discussed.

  20. Saturable absorption and 'slow light'

    E-Print Network [OSTI]

    Adrian C Selden

    2006-03-25T23:59:59.000Z

    Quantitative evaluation of some recent 'slow light' experiments based on coherent population oscillations (CPO) shows that they can be more simply interpreted as saturable absorption phenomena. Therefore they do not provide an unambiguous demonstration of 'slow light'. Indeed a limiting condition on the spectral bandwidth is not generally satisfied, such that the requirements for burning a narrow spectral hole in the homogeneously broadened absorption line are not met. Some definitive tests of 'slow light' phenomena are suggested, derived from analysis of phase shift and pulse delay for a saturable absorber

  1. An Analysis of Steam Process Heater Condensate Drainage Options

    E-Print Network [OSTI]

    Risko, J. R.

    for those installations with unsuitable condensate drainage include: ? Condensate being visibly wasted from the heat exchanger discharge side, either from a hose connection at the strainer, or an opened union or drain valve on the steam trap's outlet...

  2. Evolutionary games of condensates in coupled birth-death processes

    E-Print Network [OSTI]

    Knebel, Johannes; Krueger, Torben; Frey, Erwin

    2015-01-01T23:59:59.000Z

    Condensation phenomena arise through a collective behaviour of particles. They are observed in both classical and quantum systems, ranging from the formation of traffic jams in mass transport models to the macroscopic occupation of the energetic ground state in ultra-cold bosonic gases (Bose-Einstein condensation). Recently, it has been shown that a driven and dissipative system of bosons may form multiple condensates. Which states become the condensates has, however, remained elusive thus far. The dynamics of this condensation are described by coupled birth-death processes, which also occur in evolutionary game theory. Here, we apply concepts from evolutionary game theory to explain the formation of multiple condensates in such driven-dissipative bosonic systems. We show that vanishing of relative entropy production determines their selection. The condensation proceeds exponentially fast, but the system never comes to rest. Instead, the occupation numbers of condensates may oscillate, as we demonstrate for a...

  3. ??Rubidium Bose-Einstein condensates in optical lattices

    E-Print Network [OSTI]

    Campbell, Gretchen K. (Gretchen Kathleen)

    2007-01-01T23:59:59.000Z

    Bose-Einstein condensates in optical lattices have proven to be a powerful tool for studying a wide variety of physics. In this thesis a series of experiments using optical lattices to manipulate 87Rb Bose-Einstein condensates ...

  4. antikaon condensed matter: Topics by E-print Network

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

    higher than that of K- condensation. With the appearance of K- and bar K0 condensates, pairs of p-K- and n-bar K0 are produced with equal proportion leading to a...

  5. New inflow performance relationships for gas condensate reservoirs

    E-Print Network [OSTI]

    Del Castillo Maravi, Yanil

    2004-09-30T23:59:59.000Z

    In this work we propose two new Vogel-type Inflow Performance Relations (or IPR) correlations for gas-condensate reservoir systems. One correlation predicts dry gas production the other predicts condensate (liquid) production. These correlations...

  6. Buffer-Gas Cooled Bose-Einstein Condensate

    E-Print Network [OSTI]

    Ketterle, Wolfgang

    We report the creation of a Bose-Einstein condensate using buffer-gas cooling, the first realization of Bose-Einstein condensation using a broadly general method which relies neither on laser cooling nor unique atom-surface ...

  7. air handler condensate: Topics by E-print Network

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

    forced air 3 Experimental Performance Analysis of Air-Cooled Condenser for Low Pressure Steam Condensation CiteSeer Summary: Abstract: An experimental set up is made for an...

  8. New inflow performance relationships for gas condensate reservoirs 

    E-Print Network [OSTI]

    Del Castillo Maravi, Yanil

    2004-09-30T23:59:59.000Z

    In this work we propose two new Vogel-type Inflow Performance Relations (or IPR) correlations for gas-condensate reservoir systems. One correlation predicts dry gas production the other predicts condensate (liquid) ...

  9. Optimizing Steam & Condensate System: A Case Study

    E-Print Network [OSTI]

    Venkatesan, V. V.; Norris, C.

    2011-01-01T23:59:59.000Z

    for electricity). The site generates steam for its process operation from 3 gas fired boilers at 525-psig pressure. The steam is consumed at 5 process areas; Acid, Basics, Crystals, Derivatives & Hydrogen plants. All of the process areas recover condensate inside...

  10. Aerosol Condensational Growth in Cloud Formation

    E-Print Network [OSTI]

    Geng, Jun

    2010-10-12T23:59:59.000Z

    A code for the quasi-stationary solution of the coupled heat and mass transport equations for aerosols in a finite volume was developed. Both mass and heat are conserved effectively in the volume, which results in a competitive aerosol condensation...

  11. Bose-Einstein Condensation in Compactified Spaces

    E-Print Network [OSTI]

    Kiyoshi Shiraishi

    2012-11-26T23:59:59.000Z

    We discuss the thermodynamic potential of a charged Bose gas with the chemical potential in arbitrary dimensions. The critical temperature for Bose-Einstein condensation is investigated. In the case of the compactified background metric, it is shown that the critical temperature depends on the size of the extra spaces. The asymmetry of the "Kaluza-Klein charge" is also discussed.

  12. Water Management for Evaporatively Cooled Condensers

    E-Print Network [OSTI]

    California at Davis, University of

    Water Management for Evaporatively Cooled Condensers Theresa Pistochini May 23rd, 2012 ResearchAirCapacity,tons Gallons of Water Continuous Test - Outdoor Air 110-115 Deg F Cyclic Test - Outdoor Air 110-115 Deg F #12 AverageWaterHardness(ppm) Cooling Degree Days (60°F Reference) 20% Population 70% Population 10

  13. Di-Antiquarks condensation in Color Superconductivity

    E-Print Network [OSTI]

    Fabio L. Braghin

    2006-11-30T23:59:59.000Z

    Some consequences of a classical vector field (chromo-electromagnetic field) coupled to quarks, which undergo to superfluid and/or superconductive states with diquark / diantiquark condensation, are investigated. For this, one scalar field exchange is considered in the lines investigated by Pisarski and Rischke \\cite{PISARSKI-RISCHKE} in the mean field approach. Some effects and possible consequences are discussed.

  14. Coil Condensation Detection For Humidity Control

    E-Print Network [OSTI]

    Kaneb, Charles Peckitt

    2014-05-12T23:59:59.000Z

    of an enthalpy economizer. A spreadsheet simulation of enthalpy economizer use showed that the savings available are heavily dependent on the ability to avoid its use on very hot, humid days. A newly-designed condensation sensor was developed for this project...

  15. Cosmic Background Radiation Due to Photon Condensation

    E-Print Network [OSTI]

    B. G. Sidharth

    1998-06-10T23:59:59.000Z

    It is shown that a collection of photons with nearly the same frequency exhibits a Bose "condensation" type of phenomenon at about 3 degrees K corresponding to a peak intensity at a wave length of about 0.4cm. This could give a mechanism for the observed Cosmic Background Radiation, and also explain some curious features.

  16. Proof of Concept: Cloud Condensation Nucleus Counter

    E-Print Network [OSTI]

    Delene, David J.

    North Dakota project. The solid circle is the mean value, the horizontal line is the 50th percentile Price High Price #12;Research Applications · One commercially available cloud condensation nuclei (CCN) counter. · Available since 2002 · Sold over 100 Units, Mostly Labs · Price is Approximately $70

  17. Dimension two vacuum condensates in gauge-invariant theories

    E-Print Network [OSTI]

    D. V. Bykov; A. A. Slavnov

    2005-05-11T23:59:59.000Z

    Gauge dependence of the dimension two condensate in Abelian and non-Abelian Yang-Mills theory is investigated.

  18. Colliding and moving Bose-Einstein condensates : studies of superfluidity and optical tweezers for condensate transport

    E-Print Network [OSTI]

    Chikkatur, Ananth P., 1975-

    2003-01-01T23:59:59.000Z

    In this thesis, two different sets of experiments are described. The first is an exploration of the microscopic superfluidity of dilute gaseous Bose-Einstein condensates. The second set of experiments were performed using ...

  19. Ultrasonic absorption in liquid mixtures

    E-Print Network [OSTI]

    Davis, James Madison

    1954-01-01T23:59:59.000Z

    snd water and of methanol and water, Since Storey's work on ethanol and water at 0 C showed that for the three different frequencies at, which his investigation wms carried outx the ratio of ths absorption to the frequency squared increased...

  20. Interferometric tunability of the absorption

    E-Print Network [OSTI]

    Vittorio Giovannetti; Seth Lloyd; Lorenzo Maccone

    2006-03-27T23:59:59.000Z

    We propose an interferometric setup that permits to tune the quantity of radiation absorbed by an object illuminated by a fixed light source. The method can be used to selectively irradiate portions of an object based on their transmissivities or to accurately estimate the transmissivities from rough absorption measurements.

  1. Observation of Bogoliubov excitations in exciton-polariton condensates

    E-Print Network [OSTI]

    Loss, Daniel

    LETTERS Observation of Bogoliubov excitations in exciton-polariton condensates S. UTSUNOMIYA1 predicted the occurrence of Bose­Einstein condensation (BEC) in an ideal gas of non-interacting bosonic Bose condensed system was developed by Bogoliubov in 1947, which predicted the phonon-like excitation

  2. Microtraps and Waveguides for Bose-Einstein Condensates

    E-Print Network [OSTI]

    Microtraps and Waveguides for Bose-Einstein Condensates by Aaron E. Leanhardt Submitted and Waveguides for Bose-Einstein Condensates by Aaron E. Leanhardt Submitted to the Department of Physics Abstract Gaseous Bose-Einstein condensates containing up to 3 Ã? 106 23 Na atoms were loaded into magnetic

  3. Dynamics of Bose-Einstein Condensates Benjamin Schlein

    E-Print Network [OSTI]

    Dynamics of Bose-Einstein Condensates Benjamin Schlein Department of Mathematics, University the dynamics of Bose-Einstein condensates, ob- tained in a series of joint papers [5, 6] with L. Erdos and H Schr¨odinger equation known as the Gross-Pitaevskii equation for the time evolution of the condensate

  4. GROUND STATES AND DYNAMICS OF MULTICOMPONENT BOSEEINSTEIN CONDENSATES

    E-Print Network [OSTI]

    Bao, Weizhu

    GROUND STATES AND DYNAMICS OF MULTICOMPONENT BOSE­EINSTEIN CONDENSATES WEIZHU BAO MULTISCALE MODEL a multicomponent Bose­Einstein condensate (BEC) at zero or a very low temperature. In preparation for the numerics of multicomponent BEC. Key words. multicomponent, Bose­Einstein condensate, vector Gross­Pitaevskii equations

  5. Manipulating Bose-Einstein condensates with laser light Shin Inouye

    E-Print Network [OSTI]

    Manipulating Bose-Einstein condensates with laser light by Shin Inouye Submitted to the Department-Einstein condensates with laser light by Shin Inouye Submitted to the Department of Physics on June 7, 2001, in partial-Einstein condensate was probed and manipulated by off-resonant laser beams. Spontaneous and stimulated off

  6. DISORDERED BOSE EINSTEIN CONDENSATES WITH INTERACTION IN ONE DIMENSION

    E-Print Network [OSTI]

    Boyer, Edmond

    DISORDERED BOSE EINSTEIN CONDENSATES WITH INTERACTION IN ONE DIMENSION ROBERT SEIRINGER, JAKOB- Pitaevskii regime. We prove that Bose Einstein condensation survives even a strong random potential with a high density of scatterers. The character of the wave func- tion of the condensate, however, depends

  7. Coherent spinor dynamics in a spin-1 Bose condensate

    E-Print Network [OSTI]

    Loss, Daniel

    , for example, a Bose­Einstein condensate or a degenerate Fermi gas, the phase space accessible to low of coherent spin-changing collisions in a gas of spin-1 bosons. Starting with condensates occupying two spin of the gas, although it does not change the nature of the coherence of the condensate--indeed it has been

  8. Adsorption of Multiblock and Random Copolymer on a Solid Surface: Critical Behavior and Phase Diagram

    E-Print Network [OSTI]

    Hsu, Hsiao-Ping

    Adsorption of Multiblock and Random Copolymer on a Solid Surface: Critical Behavior and PhaseVed January 30, 2008 ABSTRACT: The adsorption of a single multiblock AB copolymer on a solid planar substrate onto an effective homopolymer adsorption problem. In particular, we discuss how the critical adsorption

  9. Adsorption of imidazolium and pyridinium ionic liquids onto montmorillonite : characterization and thermodynamic calculations

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Adsorption of imidazolium and pyridinium ionic liquids onto montmorillonite : characterization the adsorption of the RTILs through a cation exchange mechanism. Adsorption isotherms, done at pH = 7 and at 25°C, displayed that the maximum adsorption capacity of the substrates was closely linked to the nature

  10. Compact heat exchangers for condensation applications: Yesterday, today and tomorrow

    SciTech Connect (OSTI)

    Panchal, C.B.

    1993-07-01T23:59:59.000Z

    Compact heat exchangers are being increasingly considered for condensation applications in the process, cryogenic, aerospace, power and refrigeration industries. In this paper, different configurations available for condensation applications are analyzed and the current state-of-the-knowledge for the design of compact condensers is evaluated. The key technical issues for the design and development of compact heat exchangers for condensation applications are analyzed and major advantages are identified. The experimental data and performance prediction methods reported in the literature are analyzed to evaluate the present design capabilities for different compact heat-exchanger configurations. The design flexibility is evaluated for the development of new condensation applications, including integration with other process equipment.

  11. Gaugino Condensates and Fluxes in N = 1 Effective Superpotentials

    E-Print Network [OSTI]

    Jean-Pierre Derendinger; Costas Kounnas; P. Marios Petropoulos

    2008-01-30T23:59:59.000Z

    In the framework of orbifold compactifications of heterotic and type II orientifolds, we study effective N = 1 supergravity potentials arising from fluxes and gaugino condensates. These string solutions display a broad phenomenology which we analyze using the method of N = 4 supergravity gaugings. We give examples in type II and heterotic compactifications of combined fluxes and condensates leading to vacua with naturally small supersymmetry breaking scale controlled by the condensate, cases where the supersymmetry breaking scale is specified by the fluxes even in the presence of a condensate and also examples where fluxes and condensates conspire to preserve supersymmetry.

  12. Adsorption of small organic solutes from beet distillery condensates on reverse-osmosis membranes: consequences on the process performances

    E-Print Network [OSTI]

    Boyer, Edmond

    at the fermentation stage. However, transfer mechanisms through dense NF and RO membranes are still not well of the sorption isotherms of five target inhibitory compounds (acetic and butanoic acids, furfural, 2-phenethyl alone as well as mixed in order to evaluate the competition effects. Results reveal that acetic acid

  13. Energy Saving with Absorption Refrigeration Technologies

    E-Print Network [OSTI]

    Davis, R. C.

    1984-01-01T23:59:59.000Z

    Absorption refrigeration technology can be an economical and cost effective means of reducing energy cost and/or improving the efficiency and output of your process. We believe the potential benefits of absorption refrigeration technology have...

  14. Molecular interactions with ice: Molecular embedding, adsorption, detection, and release

    SciTech Connect (OSTI)

    Gibson, K. D.; Langlois, Grant G.; Li, Wenxin; Sibener, S. J., E-mail: s-sibener@uchicago.edu [The James Franck Institute and Department of Chemistry, The University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637 (United States); Killelea, Daniel R. [Department of Chemistry and Biochemistry, Loyola University Chicago, 1068 W. Sheridan Ave., Chicago, Illinois 60660 (United States)

    2014-11-14T23:59:59.000Z

    The interaction of atomic and molecular species with water and ice is of fundamental importance for chemistry. In a previous series of publications, we demonstrated that translational energy activates the embedding of Xe and Kr atoms in the near surface region of ice surfaces. In this paper, we show that inert molecular species may be absorbed in a similar fashion. We also revisit Xe embedding, and further probe the nature of the absorption into the selvedge. CF{sub 4} molecules with high translational energies (?3 eV) were observed to embed in amorphous solid water. Just as with Xe, the initial adsorption rate is strongly activated by translational energy, but the CF{sub 4} embedding probability is much less than for Xe. In addition, a larger molecule, SF{sub 6}, did not embed at the same translational energies that both CF{sub 4} and Xe embedded. The embedding rate for a given energy thus goes in the order Xe > CF{sub 4} > SF{sub 6}. We do not have as much data for Kr, but it appears to have a rate that is between that of Xe and CF{sub 4}. Tentatively, this order suggests that for Xe and CF{sub 4}, which have similar van der Waals radii, the momentum is the key factor in determining whether the incident atom or molecule can penetrate deeply enough below the surface to embed. The more massive SF{sub 6} molecule also has a larger van der Waals radius, which appears to prevent it from stably embedding in the selvedge. We also determined that the maximum depth of embedding is less than the equivalent of four layers of hexagonal ice, while some of the atoms just below the ice surface can escape before ice desorption begins. These results show that energetic ballistic embedding in ice is a general phenomenon, and represents a significant new channel by which incident species can be trapped under conditions where they would otherwise not be bound stably as surface adsorbates. These findings have implications for many fields including environmental science, trace gas collection and release, and the chemical composition of astrophysical icy bodies in space.

  15. Silicotitanate molecular sieve and condensed phases

    DOE Patents [OSTI]

    Nenoff, Tina M. (Albuquerque, NM); Nyman, May D. (Albuquerque, NM)

    2002-01-01T23:59:59.000Z

    A new microporous crystalline molecular sieve material having the formula Cs.sub.3 TiSi.sub.3 O.sub.95.cndot.3H.sub.2 O and its hydrothermally condensed phase, Cs.sub.2 TiSi.sub.6 O.sub.15, are disclosed. The microporous material can adsorb divalent ions of radionuclides or other industrial metals such as chromium, nickel, lead, copper, cobalt, zinc, cadmium, barium, and mercury, from aqueous or hydrocarbon solutions. The adsorbed metal ions can be leached out for recovery purposes or the microporous material can be hydrothermally condensed to a radiation resistant, structurally and chemically stable phase which can serve as a storage waste form for radionuclides.

  16. Condensate polishing at Surry Nuclear Power Station

    SciTech Connect (OSTI)

    McNea, D.A.; Siegwarth, D.P.; Friedman, K.A.; Sawochka, S.G.

    1983-06-01T23:59:59.000Z

    Condensate polisher system design and operation at the Surry Nuclear Power Station of Virginia Electric and Power Company were evaluated relative to the ability of the polishers to achieve effluent water quality consistent with PWR Steam Generator Owners Group chemistry guidelines. Polishers regenerated employing a conventional process were evaluated during normal plant operation and during periods of simulated condenser inleakage. Polisher effluent quality was consistent with requirements for PWR steam generator corrosion minimization with minor exceptions, i.e., sodium and sulfate leakage immediately following initiation of most service cycles. Resin aging and incomplete separation of anion and cation resin during the regeneration process were the major reasons for non-optimum polisher performance.

  17. Condensation induced water hammer driven sterilization

    DOE Patents [OSTI]

    Kullberg, Craig M.

    2004-05-11T23:59:59.000Z

    A method and apparatus (10) for treating a fluid or materials therein with acoustic energy has a vessel (14) for receiving the fluid with inner walls shaped to focus acoustic energy to a target zone within the vessel. One or more nozzles (26) are directed into the vessel (14) for injecting a condensable vapor, such as steam, into the vessel (14). The system may include a steam source (18) for providing steam as the condensable vapor from an industrial waste heat source. Steam drums (88) are disposed between the steam source (18) and nozzles (26) to equalize and distribute the vapor pressure. A cooling source (30) provides a secondary fluid for maintaining the liquid in the vessel (14) in subcooled conditions. A heating jacket (32) surrounds the vessel (14) to heat the walls of the vessel (14) and prevent biological growth thereon. A pressurizer (33) may operate the system at elevated pressures.

  18. Treatment of arsenic-contaminated water using akaganeite adsorption

    DOE Patents [OSTI]

    Cadena C., Fernando (Las Cruces, NM); Johnson, Michael D. (Las Cruces, NM)

    2008-01-01T23:59:59.000Z

    The present invention comprises a method and composition using akaganeite, an iron oxide, as an ion adsorption medium for the removal of arsenic from water and affixing it onto carrier media so that it can be used in filtration systems.

  19. Adsorption, Coadsorption and Reaction of Acetaldehyde and NO...

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

    and Reaction of Acetaldehyde and NO on Na-Y,FAU: an in situ FTIR Investigation. Adsorption, Coadsorption and Reaction of Acetaldehyde and NO on Na-Y,FAU: an in situ FTIR...

  20. Tuning of the Metal-Insulator Transition via Alkali Adsorption

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

    Tuning of the Metal-Insulator Transition via Alkali Adsorption Print Turning a material from an insulator to a metal, or vice versa, by light irradiation, exposure to electric or...

  1. Methods of using adsorption media for separating or removing constituents

    DOE Patents [OSTI]

    Tranter, Troy J. (Idaho Falls, ID); Herbst, R. Scott (Idaho Falls, ID); Mann, Nicholas R. (Blackfoot, ID); Todd, Terry A. (Aberdeen, ID)

    2011-10-25T23:59:59.000Z

    Methods of using an adsorption medium to remove at least one constituent from a feed stream. The method comprises contacting an adsorption medium with a feed stream comprising at least one constituent and removing the at least one constituent from the feed stream. The adsorption medium comprises a polyacrylonitrile (PAN) matrix and at least one metal hydroxide homogenously dispersed therein. The adsorption medium may comprise from approximately 15 wt % to approximately 90 wt % of the PAN and from approximately 10 wt % to approximately 85 wt % of the at least one metal hydroxide. The at least one metal hydroxide may be selected from the group consisting of ferric hydroxide, zirconium hydroxide, lanthanum hydroxide, cerium hydroxide, titanium hydroxide, copper hydroxide, antimony hydroxide, and molybdenum hydroxide.

  2. Water adsorption on aggregates of spherical aerosol nano particles

    E-Print Network [OSTI]

    Nie, Chu

    2005-11-01T23:59:59.000Z

    A three dimensional integral equation is developed in order to compute water adsorption onto aggregates of spherical aerosol nano particles. The integral equation is derived from molecular density functional theory, with a weighted density...

  3. Adsorption of vitamin E on mesoporous titania nanocrystals

    SciTech Connect (OSTI)

    Shih, C.J., E-mail: cjshih@kmu.edu.tw [Department of Fragrance and Cosmetic Science, Kaohsiung Medical University, Kaohsiung 807, Taiwan (China); Lin, C.T.; Wu, S.M. [School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan (China)] [School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan (China)

    2010-07-15T23:59:59.000Z

    Tri-block nonionic surfactant and titanium chloride were used as starting materials for the synthesis of mesoporous titania nanocrystallite powders. The main objective of the present study was to examine the synthesis of mesoporous titania nanocrystals and the adsorption of vitamin E on those nanocrystals using X-ray diffraction (XRD), transmission electron microscopy, and nitrogen adsorption and desorption isotherms. When the calcination temperature was increased to 300 {sup o}C, the reflection peaks in the XRD pattern indicated the presence of an anatase phase. The crystallinity of the nanocrystallites increased from 80% to 98.6% with increasing calcination temperature from 465 {sup o}C to 500 {sup o}C. The N{sub 2} adsorption data and XRD data taken after vitamin E adsorption revealed that the vitamin E molecules were adsorbed in the mesopores of the titania nanocrystals.

  4. AIR SEPARATION BY PRESSURE SWING ADSORPTION USING SUPERIOR ADSORBENTS

    SciTech Connect (OSTI)

    Ralph T. Yang

    2001-08-31T23:59:59.000Z

    Li-X zeolite (Si/Al = 1.0) is currently the best sorbent for use in the separation of air by adsorption processes. In particular, pressure swing adsorption (PSA) using zeolite sorbents is being increasingly used for air separation. Silver is also known to strongly affect the adsorptive properties of zeolites; and it is known that thermal vacuum dehydration of silver zeolites leads to the formation of silver clusters within the zeolite. In this work we have synthesized type X zeolites containing Ag and also varying mixtures of Li and Ag. In this project, we developed the Ag-containing zeolite as the best sorbent for air separation. We have also studied Co-ligand compounds as oxygen-selective sorbents. Syntheses, structural characterization and adsorption properties have been performed on all sorbents. The results are described in detail in 5 chapters.

  5. Testing a Prototype Adsorption Cooler in a Research Dwelling

    E-Print Network [OSTI]

    Sijpheer, N.; Bakker, E.J.; De Boer, R.

    2010-01-01T23:59:59.000Z

    TDC's are already available on the market. Only small scale (comfort) TDC's for applications in dwellings are not commercially available yet. This is why the Energy research Centre of the Netherlands (ECN) developed a prototype adsorption chiller...

  6. Methyl arsenic adsorption and desorption behavior on iron oxides

    E-Print Network [OSTI]

    Lafferty, Brandon James

    2005-08-29T23:59:59.000Z

    of the widespread distribution and toxicity of arsenic and methyl-arsenic, their adsorption behavior on soil minerals is of great interest. Although considerable attention has been given to the behavior of inorganic arsenic on mineral surfaces, little research has...

  7. Phase IV Simulant Testing of Monosodium Titanate Adsorption Kinetics

    SciTech Connect (OSTI)

    Hobbs, D.T.

    1999-09-29T23:59:59.000Z

    The Salt Disposition Systems Engineering Team identified the adsorption kinetics of actinides and strontium onto monosodium titanate (MST) as a technical risk in several of the processing alternatives selected for additional evaluation in Phase III of their effort.

  8. Nucleic base-directed adsorption of colloids and polyelectrolytes

    E-Print Network [OSTI]

    Terrot, Marianne S. (Marianne Simon)

    2007-01-01T23:59:59.000Z

    The primary objective of this work has been the advancement of selective adsorption techniques by use of new interactions and development of new approaches to the directed assembly of colloidal species. The ability to ...

  9. Absorption properties of identical atoms

    E-Print Network [OSTI]

    Pedro Sancho

    2013-07-31T23:59:59.000Z

    Emission rates and other optical properties of multiparticle systems in collective and entangled states differ from those in product ones. We show the existence of similar effects in the absorption probabilities for (anti)symmetrized states of two identical atoms. The effects strongly depend on the overlapping between the atoms and differ for bosons and fermions. We propose a viable experimental verification of these ideas.

  10. Pion condensation in a dense neutrino gas

    E-Print Network [OSTI]

    Hiroaki Abuki; Tomas Brauner; Harmen J. Warringa

    2009-08-26T23:59:59.000Z

    We argue that using an equilibrated gas of neutrinos it is possible to probe the phase diagram of QCD for finite isospin and small baryon chemical potentials. We discuss this region of the phase diagram in detail and demonstrate that for large enough neutrino densities a Bose-Einstein condensate of positively charged pions arises. Moreover, we show that for nonzero neutrino density the degeneracy in the lifetimes and masses of the charged pions is lifted.

  11. New silicotitanate molecular sieve and condensed phases

    SciTech Connect (OSTI)

    Nenoff, Tina M.; Nyman, May D.

    2000-11-01T23:59:59.000Z

    This patent application relates to an invention for a new silicotitanate molecular sieve ion exchange material for the capture and immobilization of divalent cations from aqueous and/or hydrocarbon solutions, including elements such as radioactive strontium or industrial RCRA metal cations. The invention also relates to the ability to either recycle the captured metal for future use or to encapsulate the cation through thermal treatment of the molecular sieve to a condensed phase.

  12. THE COLOUR GLASS CONDENSATE: AN INTRODUCTION

    SciTech Connect (OSTI)

    IANCU,E.; LEONIDOV,A.; MCLERRAN,L.

    2001-08-06T23:59:59.000Z

    In these lectures, the authors develop the theory of the Colour Glass Condensate. This is the matter made of gluons in the high density environment characteristic of deep inelastic scattering or hadron-hadron collisions at very high energy. The lectures are self contained and comprehensive. They start with a phenomenological introduction, develop the theory of classical gluon fields appropriate for the Colour Glass, and end with a derivation and discussion of the renormalization group equations which determine this effective theory.

  13. Evaluation of condensate polishers. Final report. [PWR

    SciTech Connect (OSTI)

    Lurie, S.W.

    1983-06-01T23:59:59.000Z

    The potential for steam generator corrosion caused by the release of resins or soluble impurity chemicals from full-flow condensate polishing was evaluated in a series of high temperature tests. The tests were designed to operate within the then prevailing NSSS steam generator chemistry specifications, consistent with realistic release of these impurities to steam generators. Each potential corrodent was tested separately in the absence of other corrosive conditions.

  14. Condensing Hybrid Water Heater Monitoring Field Evaluation

    SciTech Connect (OSTI)

    Maguire, J.; Earle, L.; Booten, C.; Hancock, C. E.

    2011-10-01T23:59:59.000Z

    This paper summarizes the Mascot home, an abandoned property that was extensively renovated. Several efficiency upgrades were integrated into this home, of particular interest, a unique water heater (a Navien CR240-A). Field monitoring was performed to determine the in-use efficiency of the hybrid condensing water heater. The results were compared to the unit's rated efficiency. This unit is Energy Star qualified and one of the most efficient gas water heaters currently available on the market.

  15. Oscillation dynamics of multi-well condensates

    E-Print Network [OSTI]

    S. Mossmann; C. Jung

    2006-12-05T23:59:59.000Z

    We propose a new approach to the macroscopic dynamics of three-well Bose-Einstein condensates, giving particular emphasis to self-trapping and Josephson oscillations. Although these effects have been studied quite thoroughly in the mean-field approximation, a full quantum description is desirable, since it avoids pathologies due to the nonlinear character of the mean-field equations. Using superpositions of quantum eigenstates, we construct various oscillation and trapping scenarios.

  16. Thermochemical Analysis of Hydrogen Absorption in Welding

    E-Print Network [OSTI]

    Eagar, Thomas W.

    '' .' j I ~l Thermochemical Analysis of Hydrogen Absorption in Welding A new model that addresses the shortcomings of Sievert's law for predicting hydrogen absorption is proposed ABSTRACT. A systematic review of diatomic hydrogen) to calcu· late the hydrogen absorption reaction temperature in the weld pool is invalid

  17. Absorption cross section in Lifshitz black hole

    E-Print Network [OSTI]

    Taeyoon Moon; Yun Soo Myung

    2012-10-05T23:59:59.000Z

    We derive the absorption cross section of a minimally coupled scalar in the Lifshitz black hole obtained from the new massive gravity. The absorption cross section reduces to the horizon area in the low energy and massless limit of s-wave mode propagation, indicating that the Lifshitz black hole also satisfies the universality of low energy absorption cross section for black holes.

  18. Apparent adsorption and microbial degradation of phenol by soil

    SciTech Connect (OSTI)

    Scott, H.D.; Wolf, D.C.; Lavy, T.L.

    1982-01-01T23:59:59.000Z

    The objective of this study was to determine effects of pretreatment, equilibrium time, and concentration on adsorption of the labile organic chemical phenol by two soils: Captina silt loam (Typie Fragiudult) and Palouse silt loam (Ultic Haploxeroll). Adsorption of phenol by soil was determined by radioassay using the batch technique. Since loss from solution is equated with adsorption with the batch method, degradation of phenol is also recorded as adsorption. Adsorption of phenol was low, as evidenced by Freudlich K values of 0.57 and 1.19 for the sterile Captina and Palouse soils, respectively. The addition of water, glucose, or nutrient broth to the non-sterile soil increased the apparent adsorption by reducing the phenol concentration in the solution phase. As equilibration time increased, the apparent adsorption of phenol by the non-sterile soil also increased. When compared with the sterilized soil, this increase suggested that the loss of phenol from solution was largely due to microbial decomposition. As the concentration of phenol increased, there was a corresponding increase in the lag phase and a decrease in the degradation rate constant indicating inhibition and microbial activity by phenol at higher concentrations. The length of time in the lag phase was linearly related to the log of the phenol concentration. At a given concentration, the lag phase of the Captina soil was longer and more sensitive to changes in phenol concentration than was the lag phase in the Palouse soil. This was attributed to its lower phenol adsorption, organic matter content, and initial microbial population.

  19. Adsorption analysis of ammonia in an aqueous solution

    SciTech Connect (OSTI)

    Arman, B.; Panchal, C.B.

    1993-08-01T23:59:59.000Z

    An analysis is carried out to determine the effects of the diffusional resistance on the rate of the adsorption of ammonia in an aqueous solution. A performance prediction model is developed to calculate the local rate of heat and mass transfer, including physical and thermodynamic property calculations of the mixture. An algorithm is developed for calculating the interfacial conditions. The local heat- and mass-transfer calculation is then incorporated into the performance prediction method for adsorption for a given geometry.

  20. Adsorption of alkyl amides: monolayer structures and mixing behaviour

    E-Print Network [OSTI]

    Bhinde, Tej

    2011-02-08T23:59:59.000Z

    Adsorption of alkyl amides: monolayer structures and mixing behaviour Tej Bhinde Jesus College University of Cambridge October 2010 This dissertation is submitted for the degree of Doctor of Philosophy i   Preface... gratitude to my family for their love, support and encouragement. iii Adsorption of alkyl amides: monolaye r structures and mixing behaviour Tej Bhinde Abstract In this work monolayers of alkyl amides adsorbed on a graphite surface have been...

  1. Adsorption on tunable bilayer graphene: A model approach

    SciTech Connect (OSTI)

    Alisultanov, Z. Z., E-mail: zaur0102@gmail.com [Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)

    2013-07-15T23:59:59.000Z

    The problem of the adsorption of atoms on the surface of tunable bilayer graphene is considered within the context of Anderson's model. Analytical expressions for the densities of states of bilayer graphene and an adatom are derived, and the charge exchange between adatoms and bilayer graphene is studied. The charge of adatoms of some elements is estimated. The change induced in the density of states of tunable bilayer graphene by the adsorption of atoms is explored.

  2. Adsorption of atmospheric organic pollutants by carbonaceous adsorbents

    E-Print Network [OSTI]

    Coley, James Bowlin McCoy

    1981-01-01T23:59:59.000Z

    ADSORPTION OF ATMOSPHERIC ORGANIC POLLUTANTS BY CARBONACEOUS ADSORBENTS A Thesis by JAMES BOWLIN McCOY COLEY Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1981 Major Subject: Chemistry ADSORPTION OF ATMOSPHERIC ORGANIC POLLUTANTS BY CARBONACEOUS ADSORBENTS A Thesis by JAMES BOWLIN McCOY COLEY Approved as to style and content by: (Chairman of Committee) (Member) (Member) (Head...

  3. Formation of a condensate during charged collapse

    E-Print Network [OSTI]

    Ariel Edery; Benjamin Constantineau

    2015-06-22T23:59:59.000Z

    We observe a condensate forming in the interior of a black hole (BH) during numerical simulations of gravitational collapse of a massless charged (complex) scalar field. The magnitude of the scalar field in the interior tends to a non-zero constant; spontaneous breaking of gauge symmetry occurs and a condensate forms. This phenomena occurs in the presence of a BH without the standard symmetry breaking quartic potential; the breaking occurs via the dynamics of the system itself. We also observe that the scalar field in the interior rotates in the complex plane and show that it matches numerically the electric potential to within $1\\%$. That a charged scalar condensate can form near the horizon of a black hole in the Abelian Higgs model without the standard symmetry breaking potential had previously been shown analytically in an explicit model involving a massive scalar field in an $AdS_4$ background. Our numerical simulation lends strong support to this finding, although in our case the scalar field is massless and the spacetime is asymptotically flat.

  4. Orientifold Planar Equivalence: The Chiral Condensate

    E-Print Network [OSTI]

    Adi Armoni; Biagio Lucini; Agostino Patella; Claudio Pica

    2008-09-29T23:59:59.000Z

    The recently introduced orientifold planar equivalence is a promising tool for solving non-perturbative problems in QCD. One of the predictions of orientifold planar equivalence is that the chiral condensates of a theory with $N_f$ flavours of Dirac fermions in the symmetric (or antisymmetric) representation and $N_f$ flavours of Majorana fermions in the adjoint representation have the same large $N$ value for any value of the mass of the (degenerate) fermions. Assuming the invariance of the theory under charge conjugation, we prove this statement on the lattice for staggered quenched condensates in SU($N$) Yang-Mills in the large $N$ limit. Then, we compute numerically those quenched condensates for $N$ up to 8. After separating the even from the odd corrections in $1/N$, we are able to show that our data support the equivalence; however, unlike other quenched observables, subleading terms in $1/N$ are needed for describing the data for the symmetric and antisymmetric representation at $N$=3. Possible lessons for the unquenched case are discussed.

  5. Gravitational dynamics in Bose Einstein condensates

    E-Print Network [OSTI]

    Florian Girelli; Stefano Liberati; Lorenzo Sindoni

    2008-12-03T23:59:59.000Z

    Analogue models for gravity intend to provide a framework where matter and gravity, as well as their intertwined dynamics, emerge from degrees of freedom that have a priori nothing to do with what we call gravity or matter. Bose Einstein condensates (BEC) are a natural example of analogue model since one can identify matter propagating on a (pseudo-Riemannian) metric with collective excitations above the condensate of atoms. However, until now, a description of the "analogue gravitational dynamics" for such model was missing. We show here that in a BEC system with massive quasi-particles, the gravitational dynamics can be encoded in a modified (semi-classical) Poisson equation. In particular, gravity is of extreme short range (characterized by the healing length) and the cosmological constant appears from the non-condensed fraction of atoms in the quasi-particle vacuum. While some of these features make the analogue gravitational dynamics of our BEC system quite different from standard Newtonian gravity, we nonetheless show that it can be used to draw some interesting lessons about "emergent gravity" scenarios.

  6. Measuring non-condensable gases in steam

    SciTech Connect (OSTI)

    Doornmalen, J. P. C. M. van; Kopinga, K., E-mail: k.kopinga@tue.nl [Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven (Netherlands)

    2013-11-15T23:59:59.000Z

    In surgery, medical devices that are used should be sterilized. To obtain surface steam sterilization conditions, not only in the sterilizer chamber itself but also in the loads to be sterilized, the amount of non-condensable gases (NCGs), for instance air, should be very low. Even rather small fractions of NCGs (below 1 %) seriously hamper steam penetration in porous materials or devices with hollow channels (e.g., endoscopes). A recently developed instrument which might detect the presence of residual NCGs in a reliable and reproducible way is the 3M{sup TM} Electronic Test System (ETS). In this paper, a physical model is presented that describes the behavior of this instrument. This model has been validated by experiments in which known fractions of NCGs were introduced in a sterilizer chamber in which an ETS was placed. Despite several approximations made in the model, a good agreement is found between the model predictions and the experimental results. The basic principle of the ETS, measuring the heat transfer by condensation on a cooled surface, permits a very sensitive detection of NCGs in harsh environments like water vapor at high temperatures and pressures. Our model may serve to develop adapted and optimized versions of this instrument for use outside the field of sterilization, e.g., in heat exchangers based on steam condensation.

  7. Thermodynamic model for surfactant adsorption: Topical report. [Decyltrimethylammonium bromide

    SciTech Connect (OSTI)

    Woodbury, G.W. Jr.; Noll, L.A.

    1987-01-01T23:59:59.000Z

    A simple, semi-empirical thermodynamic model was constructed for the adsorption of solutions of surfactants onto solid surfaces. Essentially a modified finite-layer BET theory, the model is complete in that it predicts all surface thermodynamic properties. The properties of bulk solutions are considered in an exact way, and the availability of bulk thermodynamic properties is assumed. The theory has been applied satisfactorily to both the adsorption isotherm and the heat of adsorption curve for the adsorption of decyltrimethylammonium bromide (DTAB) on silica gel. In this system, the observed adsorption which occurs above the critical micelle concentration (CMC) depends on the detailed behavior of the bulk thermodynamic properties; since the measured surface properties are sensitive to bulk properties, the latter must be accounted for accurately. DTAB is the only reported surfactant system, for which both the isotherm and the heat have been measured and for which the bulk solution properties are known. A critical test of the theory awaits more data of this type; however, the theory has been tested against isotherms measured by Scamehorn, et al., and has been found to fit within experimental error below the CMC. There are many areas in which the adsorption of surfactants is of practical importance such as minerals processing, lubrication, and enhanced oil recovery. The theory should prove useful to all of these areas. In the scope of enhanced oil recovery, this theory is intended to be developed into an adsorption module for a reservoir simulator for surfactant-mineral systems whose behavior is too complex to be modeled by Henry's law or even a Langmuir isotherm. 15 refs., 6 figs., 2 tabs.

  8. A Novel Absorption Cycle for Combined Water Heating, Dehumidification, and Evaporative Cooling

    SciTech Connect (OSTI)

    CHUGH, Devesh [University of Florida, Gainesville; Gluesenkamp, Kyle R [ORNL; Abdelaziz, Omar [ORNL; Moghaddam, Saeed [University of Florida, Gainesville

    2014-01-01T23:59:59.000Z

    In this study, development of a novel system for combined water heating, dehumidification, and space evaporative cooling is discussed. Ambient water vapor is used as a working fluid in an open system. First, water vapor is absorbed from an air stream into an absorbent solution. The latent heat of absorption is transferred into the process water that cools the absorber. The solution is then regenerated in the desorber, where it is heated by a heating fluid. The water vapor generated in the desorber is condensed and its heat of phase change is transferred to the process water in the condenser. The condensed water can then be used in an evaporative cooling process to cool the dehumidified air exiting the absorber, or it can be drained if primarily dehumidification is desired. Essentially, this open absorption cycle collects space heat and transfers it to process water. This technology is enabled by a membrane-based absorption/desorption process in which the absorbent is constrained by hydrophobic vapor-permeable membranes. Constraining the absorbent film has enabled fabrication of the absorber and desorber in a plate-and-frame configuration. An air stream can flow against the membrane at high speed without entraining the absorbent, which is a challenge in conventional dehumidifiers. Furthermore, the absorption and desorption rates of an absorbent constrained by a membrane are greatly enhanced. Isfahani and Moghaddam (Int. J. Heat Mass Transfer, 2013) demonstrated absorption rates of up to 0.008 kg/m2s in a membrane-based absorber and Isfahani et al. (Int. J. Multiphase Flow, 2013) have reported a desorption rate of 0.01 kg/m2s in a membrane-based desorber. The membrane-based architecture also enables economical small-scale systems, novel cycle configurations, and high efficiencies. The absorber, solution heat exchanger, and desorber are fabricated on a single metal sheet. In addition to the open arrangement and membrane-based architecture, another novel feature of the cycle is recovery of the solution heat energy exiting the desorber by process water (a process-solution heat exchanger ) rather than the absorber exiting solution (the conventional solution heat exchanger ). This approach has enabled heating the process water from an inlet temperature of 15 C to 57 C (conforming to the DOE water heater test standard) and interfacing the process water with absorbent on the opposite side of a single metal sheet encompassing the absorber, process-solution heat exchanger, and desorber. The system under development has a 3.2 kW water heating capacity and a target thermal coefficient of performance (COP) of 1.6.

  9. DEVELOPMENT OF SOLAR DRIVEN ABSORPTION AIR CONDITIONERS AND HEAT PUMPS

    E-Print Network [OSTI]

    Dao, K.

    2013-01-01T23:59:59.000Z

    DRIVEN ABSORPTION AIR CONDITIONERS AND HEAT PUMPS K. Dao, M.ABSORPTION AIR CONDITIONERS AND HEAT PUMPS* K. DAO, M.

  10. Computer modeling of corrosion in absorption cooling cycles

    SciTech Connect (OSTI)

    Anderko, A.; Young, R.D. [OLI Systems Inc., Morris Plains, NJ (United States)

    1999-11-01T23:59:59.000Z

    A comprehensive model has been developed for the computation of corrosion rates of carbon steels in the presence of lithium bromide-based brines that are used as working fluids for absorption refrigeration cycles. The model combines a thermodynamic model that provides realistic speciation of aqueous systems with an electrochemical model for partial cathodic and anodic processes on the metal surface. The electrochemical model includes the adsorption of halides, which strongly influences the corrosion process. Also, the model takes into account the formation of passive films, which become important at high temperatures, at which the refrigeration equipment operates. The model has been verified by comparing calculated corrosion rates with laboratory data for carbon steels in LiBr solutions. Good agreement between the calculated and experimental corrosion rates has been obtained. In particular, the model is capable of reproducing the effects of changes in alkalinity and molybdate concentration on the rates of general corrosion. The model has been incorporated into a program that makes it possible to analyze the effects of various conditions such as temperature, pressure, solution composition or flow velocity on corrosion rates.

  11. Creation of Dirac Monopoles in Spinor Bose-Einstein Condensates

    SciTech Connect (OSTI)

    Pietilae, Ville [Department of Applied Physics/COMP, Helsinki University of Technology, P.O. Box 5100, FI-02015 TKK (Finland); Australian Research Council, Centre of Excellence for Quantum Computer Technology, University of New South Wales, Sydney 2052 (Australia); Moettoenen, Mikko [Department of Applied Physics/COMP, Helsinki University of Technology, P.O. Box 5100, FI-02015 TKK (Finland); Australian Research Council, Centre of Excellence for Quantum Computer Technology, University of New South Wales, Sydney 2052 (Australia); Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 3500, FI-02015 TKK (Finland)

    2009-07-17T23:59:59.000Z

    We demonstrate theoretically that, by using external magnetic fields, one can imprint pointlike topological defects on the spin texture of a dilute Bose-Einstein condensate. The symmetries of the condensate order parameter render this topological defect to be accompanied with a vortex filament corresponding to the Dirac string of a magnetic monopole. The vorticity in the condensate coincides with the magnetic field of a magnetic monopole, providing an ideal analogue to the monopole studied by Dirac.

  12. S-Dual Gaugino Condensation and Supersymmetry Breaking

    E-Print Network [OSTI]

    Z. Lalak; A. Niemeyer; H. P. Nilles

    1994-10-27T23:59:59.000Z

    The principle of S-duality is used to incorporate gaugino condensates into effective supergravity (superstring) Lagrangians. We discuss two implementations of S-duality which differ in the way the coupling constant is transformed. Both solve the problem of the runaway dilaton and lead to satisfactory supersymmetry breaking in models with a {\\em single} gaugino condensate. The breakdown of supersymmetry is intimately related to a nontrivial transformation of the condensate under T-duality.

  13. Fermion mass generation without a condensate

    E-Print Network [OSTI]

    Venkitesh Ayyar

    2014-12-05T23:59:59.000Z

    We study a lattice field theory model containing two flavors of massless staggered fermions with an onsite four-fermion interaction. The symmetry of the model forbids non-zero fermion bilinear order parameters that can generate a fermion mass. At weak couplings, we expect a massless fermion phase. At strong couplings, we can argue for the existence of massive fermions without the formation of any fermion bilinear condensate. Using Monte Carlo calculations in three space-time dimensions, we find evidence for a direct second order phase transition between the two phases.

  14. Localized Domains of Disoriented Chiral Condensates

    E-Print Network [OSTI]

    B. K. Nandi; T. K. Nayak; B. Mohanty; D. P. Mahapatra; Y. P. Viyogi

    1999-03-12T23:59:59.000Z

    A new method to search for localized domains of disoriented chiral condensates (DCC) has been proposed by utilising the (eta-phi) phase space distributions of charged particles and photons. Using the discrete wavelet transformation (DWT) analysis technique, it has been found that the presence of DCC domains broadens the distribution of wavelet coefficients in comparison to that of normal events. Strength contours have been derived from the differences in rms deviations of these distributions by taking into account the size of DCC domains and the probability of DCC production in ultra-relativistic heavy ion collisions. This technique can be suitably adopted to experiments measuring multiplicities of charged particles and photons.

  15. Innovations in high rate condensate polishing systems

    SciTech Connect (OSTI)

    O`Brien, M. [Graver Water Division, Union, NJ (United States)

    1995-01-01T23:59:59.000Z

    Test work is being conducted at two major east coast utilities to evaluate flow distribution in high flow rate condensate polishing service vessels. The work includes core sample data used to map the flow distribution in vessels as originally manufactured. Underdrain modifications for improved flow distribution are discussed with data that indicates performance increases of the service vessel following the modifications. The test work is on going, with preliminary data indicating that significant improvements in cycle run length are possible with underdrain modifications. The economic benefits of the above modifications are discussed.

  16. Effective equations for GFT condensates from fidelity

    E-Print Network [OSTI]

    Lorenzo Sindoni

    2014-08-13T23:59:59.000Z

    The derivation of effective equations for group field theories is discussed from a variational point of view, with the action being determined by the fidelity of the trial state with respect to the exact state. It is shown how the maximisation procedure with respect to the parameters of the trial state lead to the expected equations, in the case of simple condensates. Furthermore, we show that the second functional derivative of the fidelity gives a compact way to estimate, within the effective theory itself, the limits of its validity. The generalisation can be extended to include the Nakajima--Zwanzig projection method for general mixed trial states.

  17. Quantum Condensed Matter | More Science | ORNL

    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:Energy: Grid Integration Redefining What's Possible forPortsmouth/Paducah47,193.70COMMUNITY AEROSOL:Quantum Condensed Matter SHARE Quantum

  18. Quantum Condensed Matter | Neutron Science | ORNL

    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:Energy: Grid Integration Redefining What's Possible forPortsmouth/Paducah47,193.70COMMUNITY AEROSOL:Quantum Condensed Matter SHARE

  19. Color Glass Condensate in QCD at High Energy

    E-Print Network [OSTI]

    Kazunori Itakura

    2004-10-28T23:59:59.000Z

    I give a brief review about the color glass condensate, which is the universal form of hadrons and nuclei at high energies.

  20. Workshop on Condensing Heating and Water Heating Equipment

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

    Workshop on Condensing Heating and Water Heating Equipment Thursday, October 9, 2014 List of Attendees OrganizationAttendees DOE - John Cymbalsky - Ashley Armstrong - Johanna...

  1. Air-Cooled Condensers for Next Generation Power Plants

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

    based on specifications for a condenser in existing binary plant * Used combination of Aspen Plus and Aspen's Exchanger Design and Rating (EDR) software tools to evaluate...

  2. Steam and Condensate System Optimization in Converse College, Spartanburg, SC

    E-Print Network [OSTI]

    Cruz, A.; Iordanova, N.; Stevenson, S.

    2007-01-01T23:59:59.000Z

    STEAM AND CONDENSATE SYSTEM OPTIMIZATION IN CONVERSE COLLEGE, SPARTANBURG, SC Alberto Cruz, CEM Nevena Iordanova, CEM Susan Stevenson Energy Systems Engineer Director of Engineering Services VP for Finance...

  3. Critical temperature of antikaon condensation in nuclear matter

    E-Print Network [OSTI]

    Sarmistha Banik; Walter Greiner; Debades Bandyopadhyay

    2008-12-30T23:59:59.000Z

    We investigate the critical temperature of Bose-Einstein condensation of $K^-$ mesons in neutron star matter. This is studied within the framework of relativistic field theoretical models at finite temperature where nucleon-nucleon and (anti)kaon-nucleon interactions are mediated by the exchange of mesons. The melting of the antikaon condensate is studied for different values of antikaon optical potential depths. We find that the critical temperature of antikaon condensation increases with baryon number density. Further it is noted that the critical temperature is lowered as antikaon optical potential becomes less attractive. We also construct the phase diagram of neutron star matter with $K^-$ condensate.

  4. Neutron Scattering: Condensed Matter and Magnetic Science, MPA...

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

    Neutron Scattering Neutron Scattering Capability description: Neutron scattering is a powerful probe of structure and collective modes of condensed matter. We are focused on direct...

  5. Air Handler Condensate Recovery at the Environmental Protection...

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

    Air Handler Condensate Recovery at the Environmental Protection Agency's Science and Ecosystem Support Division: Best Management Practice Case Study 14: Alternate Water Sources,...

  6. natural gas+ condensing flue gas heat recovery+ water creation...

    Open Energy Info (EERE)

    natural gas+ condensing flue gas heat recovery+ water creation+ CO2 reduction+ cool exhaust gases+ Energy efficiency+ commercial building energy efficiency+ industrial energy...

  7. Condensing Heating and Water Heating Equipment Workshop Location...

    Energy Savers [EERE]

    Condensing Heating and Water Heating Equipment Workshop Location: Washington Gas Light Appliance Training Facility 6801 Industrial Road Springfield, VA Date: October 9, 2014 Time:...

  8. Isospin-Breaking quark condensates in Chiral Perturbation Theory

    E-Print Network [OSTI]

    A. Gomez Nicola; R. Torres Andres

    2011-11-14T23:59:59.000Z

    We analyze the isospin-breaking corrections to quark condensates within one-loop SU(2) and SU(3) Chiral Perturbation Theory including $m_u\

  9. Fidelity decay in trapped Bose-Einstein condensates

    E-Print Network [OSTI]

    G. Manfredi; P. -A. Hervieux

    2008-01-29T23:59:59.000Z

    The quantum coherence of a Bose-Einstein condensate is studied using the concept of quantum fidelity (Loschmidt echo). The condensate is confined in an elongated anharmonic trap and subjected to a small random potential such as that created by a laser speckle. Numerical experiments show that the quantum fidelity stays constant until a critical time, after which it drops abruptly over a single trap oscillation period. The critical time depends logarithmically on the number of condensed atoms and on the perturbation amplitude. This behavior may be observable by measuring the interference fringes of two condensates evolving in slightly different potentials.

  10. aldol condensation estrutura: Topics by E-print Network

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

    para estruturas mais leves (more) Valdinei Sczibor 2002-01-01 27 Squeezed Condensates Quantum Physics (arXiv) Summary: We analyse the atomic state obtained by...

  11. atomic physics condensed: Topics by E-print Network

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

    REVIEW A 84, 053630 (2011) Multiple dark-bright solitons in atomic Bose-Einstein condensates Mathematics Websites Summary: PHYSICAL REVIEW A 84, 053630 (2011) Multiple...

  12. Light Absorption by Secondary Organic Aerosol from ?-Pinene: Effects of Oxidants, Seed Aerosol Acidity, and Relative Humidity

    SciTech Connect (OSTI)

    Song, Chen; Gyawali, Madhu S.; Zaveri, Rahul A.; Shilling, John E.; Arnott, W. Patrick

    2013-10-25T23:59:59.000Z

    It is well known that light absorption from dust and black carbon aerosols has a warming effect on climate while light scattering from sulfate, nitrate, and sea salt aerosols has a cooling effect. However, there are large uncertainties associated with light absorption and scattering by different types of organic aerosols, especially in the near-UV and UV spectral regions. In this paper, we present the results from a systematic laboratory study focused on measuring light absorption by secondary organic aerosols (SOA) generated from ozonolysis or NO3 oxidation of ?-pinene in the presence of neutral and acidic sulfate seed aerosols. Light absorption was monitored using photoacoustic spectrometers at four different wavelengths: 355, 405, 532 and 870 nm. Light absorption at 355 and 405 nm was observed by SOA generated from oxidation of ?-pinene in the presence of acidic sulfate seed aerosols, under dry conditions. No absorption was observed when the relative humidity was elevated to greater than 27%, or in the presence of neutral sulfate seed aerosols. The light-absorbing compounds are speculated to be aldol condensation oligomers with organosulfate and organic nitrate groups. The results of this study also indicate that organic nitrates from ?-pinene SOA formed in the presence of neutral sulfate seed aerosols do not appear to absorb near-UV and UV radiation.

  13. Reactant adsorption and its impact upon MTBE synthesis on zeolites

    SciTech Connect (OSTI)

    Kogelbauer, A.; Nikolopoulos, A.A.; Goodwin, J.G. Jr.; Marcelin, G. [Univ. of Pittsburgh, PA (United States)] [Univ. of Pittsburgh, PA (United States)

    1995-03-01T23:59:59.000Z

    Zeolites show interesting properties as catalysts for MTBE synthesis from methanol and isobutene such as a high selectivity to MTBE even at a low methanol/isobutene feed ratio. In order to explain this high selectivity, the adsorption behaviors of HY and HZSM-5 zeolites and their impact on activity and selectivity for MTBE synthesis were studied. Adsorption experiments, carried out under conditions similar to those used for reaction, showed that ca. 2.5 molecules of methanol were adsorbed per acid site on HZSM-5 and HY zeolites, whereas isobutene was found to form a 1:1 adsorption complex. The excess methanol adsorbed was found to be only weakly bonded, probably via hydrogen bonds. On a commercially used resin catalyst (Amberlyst-15) equal amounts of methanol and isobutene were adsorbed. The higher methanol uptake of the zeolites was paralleled by a higher selectivity to MTBE as compared to the resin catalyst. The increased adsorption of methanol on the zeolites was concluded to play a key role in suppressing the formation of by-products due to isobutene dimerization or oligomerization by decreasing the adsorption of isobutene on the active sites and thereby keeping these sites available for reaction. 40 refs., 5 figs., 3 tabs.

  14. ADSORPTION AND BONDING OF BUTANE AND PENTANE ON THE Pt(111) CRYSTAL SURFACES. EFFECTS OF OXYGEN TREATMENTS AND DEUTERIUM PREADSORPTION

    E-Print Network [OSTI]

    Salmeron, M.

    2012-01-01T23:59:59.000Z

    which may be due to its adsorption on D-covered regions.of Physical Chemistry ADSORPTION AND BONDING OF BUTANE ANDof California. LBL 12617 ADSORPTION AND BONDING OF BUTANE

  15. Water adsorption on O(2x2)/Ru(0001) from STM experiments and first-principles calculations

    E-Print Network [OSTI]

    Cabrera-Sanfelix, P.; Sanchez-Portal, D.; Mugarza, A.; Shimizu, T.K.; Salmeron, M.; Arnau, A.

    2007-01-01T23:59:59.000Z

    indicate top, hcp and fcc adsorption sites respectively. TheWater adsorption on O(2x2)/Ru(0001) from STM experiments andand experimental study of water adsorption on Ru(0001) pre-

  16. Silicate absorption in heavily obscured galaxy nuclei

    E-Print Network [OSTI]

    P. F. Roche; C. Packham; D. K. Aitken; R. E. Mason

    2006-10-19T23:59:59.000Z

    Spectroscopy at 8-13 microns with T-ReCS on Gemini-S is presented for 3 galaxies with substantial silicate absorption features, NGC 3094, NGC 7172 and NGC 5506. In the galaxies with the deepest absorption bands, the silicate profile towards the nuclei is well represented by the emissivity function derived from the circumstellar emission from the red supergiant, mu Cephei which is also representative of the mid-infrared absorption in the diffuse interstellar medium in the Galaxy. There is spectral structure near 11.2 microns in NGC 3094 which may be due to a component of crystalline silicates. In NGC 5506, the depth of the silicate absorption increases from north to south across the nucleus, suggestive of a dusty structure on scales of 10s of parsecs. We discuss the profile of the silicate absorption band towards galaxy nuclei and the relationship between the 9.7 micron silicate and 3.4 micron hydrocarbon absorption bands.

  17. Energetic condensation growth of Nb thin films

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Krishnan, M.; Valderrama, E.; James, C.; Zhao, X.; Spradlin, J.; Feliciano, A-M Valente; Phillips, L.; Reece, C. E.; Seo, K.; Sung, Z. H.

    2012-03-01T23:59:59.000Z

    This paper describes energetic condensation growth of Nb films using a cathodic arc plasma, whose 60–120 eV ions penetrate a few monolayers into the substrate and enable sufficient surface mobility to ensure that the lowest energy state (crystalline structure with minimal defects) is accessible to the film. Heteroepitaxial films of Nb were grown on ?-plane sapphire and MgO crystals with good superconducting properties and crystal size (10??mm × 20??mm ) limited only by substrate size. The substrates were heated to temperatures of up to 700°C and coated at 125°C, 300°C, 500°C, and 700°C . Film thickness was varied from ?0.25???m to >3???m . Residual resistivity ratio (RRR) values (up to a record (RRR)=587 on MgO and (RRR)=328 on ?-sapphire) depend strongly on substrate annealing and deposition temperatures. X-ray diffraction spectra and pole figures reveal that RRR increases as the crystal structure of the Nb film becomes more ordered, consistent with fewer defects and, hence, longer electron mean-free path. A transition from Nb(110) to Nb(100) orientation on the MgO(100) lattice occurs at higher temperatures. This transition is discussed in light of substrate heating and energetic condensation physics. Electron backscattered diffraction and scanning electron microscope images complement the XRD data.

  18. Ghost condensate model of flat rotation curves

    E-Print Network [OSTI]

    V. V. Kiselev

    2005-07-29T23:59:59.000Z

    An effective action of ghost condensate with higher derivatives creates a source of gravity and mimics a dark matter in spiral galaxies. We present a spherically symmetric static solution of Einstein--Hilbert equations with the ghost condensate at large distances, where flat rotation curves are reproduced in leading order over small ratio of two energy scales characterizing constant temporal and spatial derivatives of ghost field: $\\mu_*^2$ and $\\mu_\\star^2$, respectively, with a hierarchy $\\mu_\\star\\ll \\mu_*$. We assume that a mechanism of hierarchy is provided by a global monopole in the center of galaxy. An estimate based on the solution and observed velocities of rotations in the asymptotic region of flatness, gives $\\mu_*\\sim 10^{19}$ GeV and the monopole scale in a GUT range $\\mu_\\star\\sim 10^{16}$ GeV, while a velocity of rotation $v_0$ is determined by the ratio: $ \\sqrt{2} v_0^2= \\mu_\\star^2/\\mu_*^2$. A critical acceleration is introduced and naturally evaluated of the order of Hubble rate, that represents the Milgrom's acceleration.

  19. Hybrid Vapor Compression Adsorption System: Thermal Storage Using Hybrid Vapor Compression Adsorption System

    SciTech Connect (OSTI)

    None

    2012-01-04T23:59:59.000Z

    HEATS Project: UTRC is developing a new climate-control system for EVs that uses a hybrid vapor compression adsorption system with thermal energy storage. The targeted, closed system will use energy during the battery-charging step to recharge the thermal storage, and it will use minimal power to provide cooling or heating to the cabin during a drive cycle. The team will use a unique approach of absorbing a refrigerant on a metal salt, which will create a lightweight, high-energy-density refrigerant. This unique working pair can operate indefinitely as a traditional vapor compression heat pump using electrical energy, if desired. The project will deliver a hot-and-cold battery that provides comfort to the passengers using minimal power, substantially extending the driving range of EVs.

  20. Adsorption and grafting on colloidal interfaces studied by scattering techniques

    E-Print Network [OSTI]

    Julian Oberdisse

    2007-05-23T23:59:59.000Z

    The adsorption of polymer and surfactant molecules onto colloidal particles or droplets in solution can be characterized non-destructively by scattering techniques. In a first part, the general framework of Dynamic Light Scattering, Small Angle Neutron and X-ray Scattering for the determination of the structure of adsorbed layers, and namely of the density profile, is presented. We then review recent studies of layers of the model polymer poly(ethylene oxide), as homopolymer or part of a block copolymer. In this field, scattering with contrast variation has been shown to be a powerful tool to obtain a detailed description of the layer structure. Adsorption of chemically more complex systems, including polyelectrolytes, polymer complexes, grafted chains and biomacromolecules are also discussed in this review, as well as surfactant adsorption.

  1. Tc-99 Adsorption on Selected Activated Carbons - Batch Testing Results

    SciTech Connect (OSTI)

    Mattigod, Shas V.; Wellman, Dawn M.; Golovich, Elizabeth C.; Cordova, Elsa A.; Smith, Ronald M.

    2010-12-01T23:59:59.000Z

    CH2M HILL Plateau Remediation Company (CHPRC) is currently developing a 200-West Area groundwater pump-and-treat system as the remedial action selected under the Comprehensive Environmental Response, Compensation, and Liability Act Record of Decision for Operable Unit (OU) 200-ZP-1. This report documents the results of treatability tests Pacific Northwest National Laboratory researchers conducted to quantify the ability of selected activated carbon products (or carbons) to adsorb technetium-99 (Tc-99) from 200-West Area groundwater. The Tc-99 adsorption performance of seven activated carbons (J177601 Calgon Fitrasorb 400, J177606 Siemens AC1230AWC, J177609 Carbon Resources CR-1240-AW, J177611 General Carbon GC20X50, J177612 Norit GAC830, J177613 Norit GAC830, and J177617 Nucon LW1230) were evaluated using water from well 299-W19-36. Four of the best performing carbons (J177606 Siemens AC1230AWC, J177609 Carbon Resources CR-1240-AW, J177611 General Carbon GC20X50, and J177613 Norit GAC830) were selected for batch isotherm testing. The batch isotherm tests on four of the selected carbons indicated that under lower nitrate concentration conditions (382 mg/L), Kd values ranged from 6,000 to 20,000 mL/g. In comparison. Under higher nitrate (750 mg/L) conditions, there was a measureable decrease in Tc-99 adsorption with Kd values ranging from 3,000 to 7,000 mL/g. The adsorption data fit both the Langmuir and the Freundlich equations. Supplemental tests were conducted using the two carbons that demonstrated the highest adsorption capacity to resolve the issue of the best fit isotherm. These tests indicated that Langmuir isotherms provided the best fit for Tc-99 adsorption under low nitrate concentration conditions. At the design basis concentration of Tc 0.865 µg/L(14,700 pCi/L), the predicted Kd values from using Langmuir isotherm constants were 5,980 mL/g and 6,870 mL/g for for the two carbons. These Kd values did not meet the target Kd value of 9,000 mL/g. Tests conducted to ascertain the effects of changing pH showed that at pH values of 6.5 and 7.5, no significant differences existed in Tc-adsorption performance for three of the carbons, but the fourth carbon performed better at pH 7.5. When the pH was increased to 8.5, a slight decline in performance was observed for all carbons. Tests conducted to ascertain the temperature effect on Tc-99 adsorption indicated that at 21 ºC, 27 ºC, and 32 ºC there were no significant differences in Tc-99 adsorption for three of the carbons. The fourth carbon showed a noticeable decline in Tc-99 adsorption performance with increasing temperature. The presence of volatile organic compounds (VOCs) in the source water did not significantly affect Tc-99 adsorption on either of two carbons tested. Technetium-99 adsorption differed by less than 15% with or without VOCs present in the test water, indicating that Tc-99 adsorption would not be significantly affected if VOCs were removed from the water prior to contact with carbon.

  2. Combining Feedback Absorption Spectroscopy, Amplified Resonance...

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

    Compounds in Automotive Emissions Discusses a novel combination of multi-component scanning direct absorption spectroscopy, resonant cavity and low-pressure sampling to...

  3. Direct and quantitative absorptive spectroscopy of nanowires

    E-Print Network [OSTI]

    Tong, Jonathan Kien-Kwok

    2012-01-01T23:59:59.000Z

    Photonic nanostructures exhibit unique optical properties that are attractive in many different applications. However, measuring the optical properties of individual nanostructures, in particular the absorptive properties, ...

  4. Advanced Low Temperature Absorption Chiller Module Integrated...

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

    Advanced Low Temperature Absorption Chiller Module Integrated with a CHP System at a Distributed Data Center - Presentation by Exergy Partners Corp., June 2011 Advanced Low...

  5. Simulation and performance analysis of a quadruple-effect lithium bromide-water absorption

    SciTech Connect (OSTI)

    Grossman, G. [Technion-Israel Inst. of Tech., Haifa (Israel). Faculty of Mechanical Engineering; Zaltash, A.; DeVault, R.C. [Oak Ridge National Lab., TN (United States)

    1994-04-01T23:59:59.000Z

    In order to investigate the possibility of improving utilization of high temperature heat sources, such as natural gas, for absorption chillers, performance simulation has been conducted for a quadruple-effect lithium bromide-water cycle, capable of substantial performance improvement over state-of-the-art double-effect cycles. The system investigated includes four condensers and four desorbers coupled together, forming an extension of the conventional double-effect cycle; based on prior experience, a parallel flow system was perferred over series flow, and double-condenser coupling (DCC) was employed, extending from triple-effect cycles, to further improve performance. A modular computer code for simulation of absorption systems (ABSIM) was used to investigate the performances of the cycle. The simulation was carried out over a range of operating conditions, including investigation of the influence of some major design parameters. A coefficient of performance in the neighborhood of 2.0 (cooling) was calculated at the design point, with a heat supply temperature of 600{degrees}F at the solution outlet from the high temperature desorber. With some optimization of the weak (pumped) solution flowrate and of the solution split among the four desorbers, this COP may be raised above 2.2, without any increase in the heat transfer surface of the system`s components.

  6. Realization of Bose-Einstein condensates in lower dimensions Bose-Einstein condensates of sodium atoms have been prepared in optical and

    E-Print Network [OSTI]

    Realization of Bose-Einstein condensates in lower dimensions Bose-Einstein condensates of sodium dimensions exceeds the interaction energy between atoms. This realized condensates of lower dimensionality [1]. In anisotropic traps, a primary indicator of crossing the transition temperature for Bose- Einstein condensation

  7. Effects of Hydration and Oxygen Vacancy on CO2 Adsorption and...

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

    Hydration and Oxygen Vacancy on CO2 Adsorption and Activation on ?-Ga2O3(100). Effects of Hydration and Oxygen Vacancy on CO2 Adsorption and Activation on ?-Ga2O3(100)....

  8. Nitrogen adsorption data for the powder form of the PMO shows a diagnostic type IV

    E-Print Network [OSTI]

    Vinnikov, Konstantin

    Nitrogen adsorption data for the powder form of the PMO shows a diagnostic type IV isotherm). This adsorption data together with the d spacing of 4.7 nm given by PXRD provide an independent estimate

  9. ZnS Thin Films Deposited by a Spin Successive Ionic Layer Adsorption...

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

    ZnS Thin Films Deposited by a Spin Successive Ionic Layer Adsorption and Reaction Process. ZnS Thin Films Deposited by a Spin Successive Ionic Layer Adsorption and Reaction...

  10. Insights into the Mechanism of Fe(II) Adsorption and Oxidation...

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

    Mechanism of Fe(II) Adsorption and Oxidation at Fe-Clay Mineral Surfaces from First-Principles Calculations. Insights into the Mechanism of Fe(II) Adsorption and Oxidation at...

  11. The Effect of Water on the Adsorption of NO in Na- and Ba-Y,FAU...

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

    Water on the Adsorption of NO in Na- and Ba-Y,FAU Zeolites: A Combined FTIR and TPD Investigation. The Effect of Water on the Adsorption of NO in Na- and Ba-Y,FAU Zeolites: A...

  12. Adsorption dynamics and angular dependency of contaminants on Ru mirror surfaces

    E-Print Network [OSTI]

    Harilal, S. S.

    Adsorption dynamics and angular dependency of contaminants on Ru mirror surfaces M. Catalfano,a) A of the adsorption dynamics and of the emission angle (h from the target surface) dependency are still scarce

  13. NO2 Adsorption on BaO/Al2O3: The Nature of Nitrate Species. ...

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

    NO2 Adsorption on BaOAl2O3: The Nature of Nitrate Species. NO2 Adsorption on BaOAl2O3: The Nature of Nitrate Species. Abstract: The nature of nitrate species formed in the...

  14. A Comparative Study of the Adsorption of Water and Methanol in...

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

    of the Adsorption of Water and Methanol in Zeolite BEA: A Molecular Simulation Study. A Comparative Study of the Adsorption of Water and Methanol in Zeolite BEA: A Molecular...

  15. A New Analysis of X-Ray Adsorption Branching Ratios: Use ofRussell...

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

    Analysis of X-Ray Adsorption Branching Ratios: Use of Russell-Saunders Coupling . A New Analysis of X-Ray Adsorption Branching Ratios: Use of Russell-Saunders Coupling . Abstract:...

  16. Investigation of U(VI) Adsorption in Quartz-Chlorite Mineral...

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

    U(VI) Adsorption in Quartz-Chlorite Mineral Mixtures. Investigation of U(VI) Adsorption in Quartz-Chlorite Mineral Mixtures. Abstract: A batch and cryogenic laser-induced...

  17. HCI Adsorption and Ionization on Amorphous and Crystalline H2O...

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

    HCI Adsorption and Ionization on Amorphous and Crystalline H2O Films below 50 K. HCI Adsorption and Ionization on Amorphous and Crystalline H2O Films below 50 K. Abstract:...

  18. Adsorption and desorption of binary mixtures of volatile organic contaminants on soil

    E-Print Network [OSTI]

    Guo, Yang

    1995-01-01T23:59:59.000Z

    , the potential theory and the ideal adsorbed solution theory for mixture adsorption were also evaluated for prediction of the experimental results for binary adsorption. All models failed for prediction of the BET type III isotherms when methanol was present...

  19. UPS STUDY OF THE ADSORPTION OF OXYGEN ON REDUCED SrTi03 SURFACES

    E-Print Network [OSTI]

    Ferrer, S.

    2013-01-01T23:59:59.000Z

    Figure Captions Figure 1. UPS spectra of a reduced SrTi0 3 (Journal of Applied Physics UPS STUDY OF THE ADSORPTION OFof California. LBL 11614 UPS STUDY OF THE ADSORPTION OF

  20. Adsorption of inorganic contaminants in ponded effluents from coal-fired power plants

    E-Print Network [OSTI]

    Dzombak, David A.

    1985-01-01T23:59:59.000Z

    The objectives of this study were [1] to conduct some experimental tests of the surface precipitation adsorption model, and [2] to work on the development of a simple yet widely applicable approach to modelling adsorption ...

  1. An Advanced Solar-Powered Rotary Solid Adsorption Refrigerator with High Performance

    E-Print Network [OSTI]

    Zheng, A.; Gu, J.

    2006-01-01T23:59:59.000Z

    In this paper, according to practical consideration, a new solar powered rotary solid adsorption refrigerator system adopting activated carbon fibre + ethanol as its adsorption pair has been designed with higher performance. Moreover, the principle...

  2. Location of MTBE and toluene in the channel system of the zeolite mordenite: Adsorption and host-guest interactions

    SciTech Connect (OSTI)

    Arletti, Rossella, E-mail: rossella.arletti@unito.it [Department of Earth Sciences, University of Torino Via Valperga Caluso 35, I-10125, Torino (Italy)] [Department of Earth Sciences, University of Torino Via Valperga Caluso 35, I-10125, Torino (Italy); Martucci, Annalisa; Alberti, Alberto [Department of Earth Sciences, University of Ferrara, Via G. Saragat 1, I-44100, Ferrara (Italy)] [Department of Earth Sciences, University of Ferrara, Via G. Saragat 1, I-44100, Ferrara (Italy); Pasti, Luisa; Nassi, Marianna [Department of Chemistry, University of Ferrara, Via L. Borsari 26, I-44100 Ferrara (Italy)] [Department of Chemistry, University of Ferrara, Via L. Borsari 26, I-44100 Ferrara (Italy); Bagatin, Roberto [Research Centre for Non-Conventional Energy-Istituto ENI Donegani, Environmental Technologies, Via Fauser 4, I-28100 Novara (Italy)] [Research Centre for Non-Conventional Energy-Istituto ENI Donegani, Environmental Technologies, Via Fauser 4, I-28100 Novara (Italy)

    2012-10-15T23:59:59.000Z

    This paper reports a study of the location of Methyl Tertiary Butyl Ether (MTBE) and toluene molecules adsorbed in the pores of the organophylic zeolite mordenite from an aqueous solution. The presence of these organic molecules in the zeolite channels was revealed by structure refinement performed by the Rietveld method. About 3 molecules of MTBE and 3.6 molecules of toluene per unit cell were incorporated into the cavities of mordenite, representing 75% and 80% of the total absorption capacity of this zeolite. In both cases a water molecule was localized inside the side pocket of mordenite. The saturation capacity determined by the adsorption isotherms, obtained by batch experiments, and the weight loss given by thermogravimetric (TG) analyses were in very good agreement with these values. The interatomic distances obtained after the structural refinements suggest MTBE could be connected to the framework through a water molecule, while toluene could be bonded to framework oxygen atoms. The rapid and high adsorption of these hydrocarbons into the organophylic mordenite zeolite makes this cheap and environmental friendly material a suitable candidate for the removal of these pollutants from water. - graphical abstract: Location of MTBE (a) and toluene (b) in mordenite channels (projection along the [001] direction). Highlights: Black-Right-Pointing-Pointer We investigated the MTBE and toluene adsorption process into an organophilic zeolite mordenite. Black-Right-Pointing-Pointer The presence of MTBE and toluene in mordenite was determined by X-ray diffraction studies. Black-Right-Pointing-Pointer About 3 molecules of MTBE and 3.6 molecules of toluene per unit cell were incorporated into the zeolite cavities. Black-Right-Pointing-Pointer MTBE is connected to the framework through a water molecule. Black-Right-Pointing-Pointer Toluene is directly bonded to framework oxygen atoms.

  3. Modeling H2 adsorption in carbon-based structures

    E-Print Network [OSTI]

    Lamonte, Kevin Anthony

    2009-05-15T23:59:59.000Z

    MODELING H2 ADSORPTION IN CARBON-BASED STRUCTURES A Thesis by KEVIN ANTHONY LAMONTE 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 May 2008 Major... Subject: Chemical Engineering MODELING H2 ADSORPTION IN CARBON-BASED STRUCTURES A Thesis by KEVIN ANTHONY LAMONTE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER...

  4. Adsorption of silver dimer on graphene - A DFT study

    SciTech Connect (OSTI)

    Kaur, Gagandeep, E-mail: gaganj1981@yahoo.com [Department of Physics and Centre of Advanced Studies in Physics, Panjab University, Chandigarh-160014, India and Chandigarh Engineering College, Landran, Mohali-140307, Punjab (India); Gupta, Shuchi [Department of Physics and Centre of Advanced Studies in Physics, Panjab University, Chandigarh-160014, India and University Institute of Engineering and Technology, Panjab University, Chandigarh -160014 (India); Rani, Pooja; Dharamvir, Keya [Department of Physics and Centre of Advanced Studies in Physics, Panjab University, Chandigarh-160014 (India)

    2014-04-24T23:59:59.000Z

    We performed a systematic density functional theory (DFT) study of the adsorption of silver dimer (Ag{sub 2}) on graphene using SIESTA (Spanish Initiative for Electronic Simulations with Thousands of Atoms) package, in the generalized gradient approximation (GGA). The adsorption energy, geometry, and charge transfer of Ag2-graphene system are calculated. The minimum energy configuration for a silver dimer is parallel to the graphene sheet with its two atoms directly above the centre of carbon-carbon bond. The negligible charge transfer between the dimer and the surface is also indicative of a weak bond. The methodology demonstrated in this paper may be applied to larger silver clusters on graphene sheet.

  5. Adsorption of atmospheric organic pollutants by carbonaceous adsorbents 

    E-Print Network [OSTI]

    Coley, James Bowlin McCoy

    1981-01-01T23:59:59.000Z

    of Department) May 1981 ABSTRACT Adsorption of Atmospheric Organic Pollutants by Carbonaceous Adsorbents. (May 1981) James Bowlin McCoy Coley, B. S. , East Texas State University Chairman of Advisory Committee: Dr. C. S. Giam The adsorption of atmospheric.../80 mesh) Retention Data of Ethane on Ambersorb XE-348 (50/80 mesh) Retention Data of Propane on Ambersorb XE-348 (50/80 mesh) Specific Retention Volumes (V 's) at 25'C for the 8 30 33 34 37 Compounds Analyzed on Ambersorb XE-348 (50/80 mesh). 39...

  6. A Variable Cell Model for Simulating Gas Condensate Reservoir Performance

    E-Print Network [OSTI]

    Al-Majed, Abdulaziz Abdullah

    maturation profiles, which ie exhibitpd when gas pressure. Between this region near tha wellbore, SPE-~~~ SPE 21428 A Variable Cell Model for Simulating Gas Condensate Reservoir Performance A of depletion performance of gas condensate reservoirs report the existence of a A variable cell model

  7. Ion exchange equilibrium - a key to condensate polisher performance

    SciTech Connect (OSTI)

    Darji, J.D.; McGilbra, A.F.

    1980-01-01T23:59:59.000Z

    To successfully deal with the present stringent requirements for boiler feedwater, it was necessary to look at the history of condensate polishing. The feedwater quality requirements have become more stringent. To meet these quality requirements, it was essential to discuss the effect of condensate chemistry on resin performance and to realize that equipment damage may be traced to poor polisher performance. 4 refs.

  8. Emergent gravitational dynamics in Bose-Einstein condensates

    E-Print Network [OSTI]

    Lorenzo Sindoni; Florian Girelli; Stefano Liberati

    2009-09-29T23:59:59.000Z

    We discuss a toy model for an emergent non-relativistic gravitational theory. Within a certain class of Bose-Einstein condensates, it is possible to show that, in a suitable regime, a modified version of non-relativistic Newtonian gravity does effectively describes the low energy dynamics of the coupled system condensate/quasi-particles.

  9. Vacuum condensates, flavor mixing and spontaneous supersymmetry breaking

    E-Print Network [OSTI]

    Antonio Capolupo; Marco Di Mauro

    2013-01-05T23:59:59.000Z

    Spontaneous supersymmetry (SUSY) breaking is revealed in all phenomena in which vacuum condensates are physically relevant. The dynamical breakdown of SUSY is generated by the condensates themselves, which lift the zero point energy. Evidence is presented in the case of the Wess-Zuimino model, and the flavor mixing case is treated in detail.

  10. Inhomogeneous Vortex Patterns in Rotating Bose-Einstein Condensates

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    be homogeneous within the condensate we prove by means of an asymptotic analysis in the strongly interactingInhomogeneous Vortex Patterns in Rotating Bose-Einstein Condensates M. Correggia , N. Rougerieb, France. May 10, 2012 Abstract We consider a 2D rotating Bose gas described by the Gross-Pitaevskii (GP

  11. 8 Boltzmann Transport in Condensed Matter Franz Xaver Bronold

    E-Print Network [OSTI]

    Fehske, Holger

    equations as applied to the analysis of transport and relaxation phenomena in condensed matter systems. 88 Boltzmann Transport in Condensed Matter Franz Xaver Bronold Institut f¨ur Physik, Universit of view. Envisaging the molecules of the gas to perform free flights, which are occasionally interrupted

  12. Inhomogeneous Vortex Patterns in Rotating Bose-Einstein Condensates

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    should be homogeneous within the condensate we prove by means of an asymptotic analysis in the stronglyInhomogeneous Vortex Patterns in Rotating Bose-Einstein Condensates M. Correggia , N. Rougerieb, France. September 19, 2012 Abstract We consider a 2D rotating Bose gas described by the Gross

  13. A numerical analysis of condenser performance of a seawater desalination system

    E-Print Network [OSTI]

    Mohamed, Hassan, S.B. Massachusetts Institute of Technology

    2009-01-01T23:59:59.000Z

    This thesis presents the numerical analysis of three type condensers for desalination of seawater system. The condensers that were analyzed were a finned tube condenser that was built in Malaysia desalination plant, a ...

  14. Heat transfer rates for filmwise, dropwise, and superhydrophobic condensation on silicon substrates

    E-Print Network [OSTI]

    Hery, Travis M

    2011-01-01T23:59:59.000Z

    Condensation, a two-phase heat transfer processes, is commonly utilized in industrial systems. Condensation heat transfer can be optimized by using surfaces in which dropwise condensation (DWC) occurs, and even further ...

  15. Keywordscondensation tube, surface modification, waste heat and condensation water recovery system

    E-Print Network [OSTI]

    Leu, Tzong-Shyng "Jeremy"

    Keywordscondensation tube, surface modification, waste heat and condensation water recovery techniques is waste heat and condensation water recovery system. Waste heat and condensation water recovery system is one of the most important facilities in power plants. High efficiency waste heat

  16. Modeling of an adsorption unit packed with amidoxime fiber balls for the recovery of uranium from seawater

    SciTech Connect (OSTI)

    Morooka, S.; Kato, T.; Inada, M.; Kago, T.; Kusakabe, K. (Dept. of Applied Chemistry, Kyushu Univ., Fukuoka 812 (JP))

    1991-01-01T23:59:59.000Z

    Amidoxime fiber adsorbents are prepared by treating commercial poly(acrylonitrile) fibers with NH{sub 2}OH in methanol and then with an aqueous NaOH solution. The rate of adsorption of uranium from seawater is 0.1-0.3 (g of U/kg of dry fiber)/day. The fiber is placed in 2-cm-diameter spherical shells of plastic net, and these fibrous balls are packed in a column. Seawater is assumed to flow through the packed bed by the kinetic force of the ocean current. The permeation velocity of liquid in each ball is evaluated with a small electrode that detects the electrochemical limiting current. When the permeation velocity is slow, most uranyl ions are adsorbed only in the peripheral part of the ball. In this paper a model of the packed bed absorption unit is proposed and a numerical calculation gives optimum values of design parameters.

  17. Isotropization from Color Field Condensate in heavy ion collisions

    E-Print Network [OSTI]

    Stefan Floerchinger; Christof Wetterich

    2014-08-27T23:59:59.000Z

    The expanding fireball shortly after a heavy ion collision may be qualitatively described by a condensate of color fields or gluons which is analogous to Bose-Einstein-condensation for massive bosonic particles. This condensate is a transient non-equilibrium phenomenon and breaks Lorentz-boost symmetry. The dynamics of color field condensates involves collective excitations and is rather different from the perturbative scattering of gluons. In particular, it provides for an efficient mechanism to render the local pressure approximately isotropic after a short time of 0.2 fm/c. We suggest that an isotropic color field condensate may play a central role for a simple description of prethermalization and isotropization in the early stages of the collision.

  18. Collecting and recirculating condensate in a nuclear reactor containment

    DOE Patents [OSTI]

    Schultz, Terry L. (Murrysville Boro, PA)

    1993-01-01T23:59:59.000Z

    An arrangement passively cools a nuclear reactor in the event of an emergency, condensing and recycling vaporized cooling water. The reactor is surrounded by a containment structure and has a storage tank for cooling liquid, such as water, vented to the containment structure by a port. The storage tank preferably is located inside the containment structure and is thermally coupleable to the reactor, e.g. by a heat exchanger, such that water in the storage tank is boiled off to carry away heat energy. The water is released as a vapor (steam) and condenses on the cooler interior surfaces of the containment structure. The condensed water flows downwardly due to gravity and is collected and routed back to the storage tank. One or more gutters are disposed along the interior wall of the containment structure for collecting the condensate from the wall. Piping is provided for communicating the condensate from the gutters to the storage tank.

  19. Collecting and recirculating condensate in a nuclear reactor containment

    DOE Patents [OSTI]

    Schultz, T.L.

    1993-10-19T23:59:59.000Z

    An arrangement passively cools a nuclear reactor in the event of an emergency, condensing and recycling vaporized cooling water. The reactor is surrounded by a containment structure and has a storage tank for cooling liquid, such as water, vented to the containment structure by a port. The storage tank preferably is located inside the containment structure and is thermally coupleable to the reactor, e.g. by a heat exchanger, such that water in the storage tank is boiled off to carry away heat energy. The water is released as a vapor (steam) and condenses on the cooler interior surfaces of the containment structure. The condensed water flows downwardly due to gravity and is collected and routed back to the storage tank. One or more gutters are disposed along the interior wall of the containment structure for collecting the condensate from the wall. Piping is provided for communicating the condensate from the gutters to the storage tank. 3 figures.

  20. Quantum computational tensor network on string-net condensate

    E-Print Network [OSTI]

    Tomoyuki Morimae

    2011-09-27T23:59:59.000Z

    The string-net condensate is a new class of materials which exhibits the quantum topological order. In order to answer the important question, "how useful is the string-net condensate in quantum information processing?", we consider the most basic example of the string-net condensate, namely the $Z_2$ gauge string-net condensate on the two-dimensional hexagonal lattice, and show that the universal measurement-based quantum computation (in the sense of the quantum computational webs) is possible on it by using the framework of the quantum computational tensor network. This result implies that even the most basic example of the string-net condensate is equipped with the correlation space that has the capacity for the universal quantum computation.

  1. Adsorption of Sodium Dodecyl Sulfate and Sodium Dodecyl Benzenesulfonate on Poly(Vinyl Chloride) Latexes

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Adsorption of Sodium Dodecyl Sulfate and Sodium Dodecyl Benzenesulfonate on Poly(Vinyl Chloride@cpe.fr #12;2 Abstract The adsorption of sodium dodecyl sulfate (SDS) and sodium dodecyl benzenesulfonate performed to determine the area per surfactant molecule at various temperatures (20-50ºC) and the adsorption

  2. Adsorption of supramolecular building blocks on graphite: A force field and density functional theory study

    E-Print Network [OSTI]

    Pfeifer, Holger

    Adsorption of supramolecular building blocks on graphite: A force field and density functional-mail: axel.gross@uni-ulm.de The adsorption of the oligopyridine isomers 2,4'-BTP and 3,3'- BTP on graphite with an C6R-6-type dispersion correction, and the calculated adsorption energies are compared to the results

  3. Adsorption isotherms and thermal fluctuations K. R. Mecke* and J. Krim

    E-Print Network [OSTI]

    Krim, Jacqueline

    Adsorption isotherms and thermal fluctuations K. R. Mecke* and J. Krim Physics Department fluctuations on adsorption isotherms is calculated within the context of a self- consistent mean-field theory, and it is found that such fluctuations cannot be neglected in the analysis of adsorption data. This result arises

  4. Adsorption of Benzene, Fluorobenzene and Meta-di-Fluorobenzene on Cu(110): A Computational Study

    E-Print Network [OSTI]

    Gao, Hongjun

    Adsorption of Benzene, Fluorobenzene and Meta-di-Fluorobenzene on Cu(110): A Computational Study L.interscience.wiley.com). Abstract: We modelled the adsorption of benzene, fluorobenzene and meta-di-fluorobenzene on Cu(110) by Den- sity Functional Theory. We found that the adsorption configuration depends on the coverage. At high

  5. Adsorption and transformation of tetracycline antibiotics with aluminum oxide Wan-Ru Chen 1

    E-Print Network [OSTI]

    Huang, Ching-Hua

    Adsorption and transformation of tetracycline antibiotics with aluminum oxide Wan-Ru Chen 1 , Ching) and product formation. The transformation reac- tion rate of TCs strongly correlates with adsorption to Al2O3 surfaces. Both adsorption and transformation occur at the highest rate at around neutral pH conditions

  6. Exchange Symmetries in Motzkin Path and Bargraph models of Copolymer Adsorption

    E-Print Network [OSTI]

    Rechnitzer, Andrew

    Exchange Symmetries in Motzkin Path and Bargraph models of Copolymer Adsorption E.J. Janse van; this is a directed model of copolymer adsorption, and in a particular case it is possible to find an asymptotic expression for the adsorption critical point of the model as a function of the colouring. In this paper we

  7. Adsorption and dissociation of hydrazoic acid on Al,,111... Dirk Porezag

    E-Print Network [OSTI]

    Liu, Amy Y.

    Adsorption and dissociation of hydrazoic acid on Al,,111... Dirk Porezag Center for Computational the adsorption of N3H on the Al 111 surface using ab initio density-functional theory and a self-ion implantation,3,4 N2H4 adsorption,5,6 N2 glow discharge,7,8 and metal-organic chemical vapor deposition MOCVD

  8. ADSORPTION OF INTAN-100 AT THE BITUMEN/AQUEOUS SOLUTION INTERFACE STUDIED BY SPINNING DROP

    E-Print Network [OSTI]

    Joseph, Daniel D.

    1 ADSORPTION OF INTAN-100 AT THE BITUMEN/AQUEOUS SOLUTION INTERFACE STUDIED BY SPINNING DROP an experimental study on the adsorption behaviour of Intan-100, a non- ionic surfactant, at the bitumen Spinning Drop Tensiometer, bitumen, heavy water, Intan-100, Gibbs adsorption isotherm. #12;2 Introduction

  9. Adsorption of Charge-Bidisperse Mixtures of Colloidal Jeffrey J. Gray and Roger T. Bonnecaze*

    E-Print Network [OSTI]

    Gray, Jeffrey J.

    Adsorption of Charge-Bidisperse Mixtures of Colloidal Particles Jeffrey J. Gray and Roger T with the number of components in the system. Here, we perform simulations of the adsorption of binary mixtures%. In sequential adsorption, small amounts of the second component adsorb only for parameter combinations

  10. Adsorption of the first layer of argon on graphite (*) Laboratoire des Composs non St0153chiomtriques,

    E-Print Network [OSTI]

    Boyer, Edmond

    L-9 Adsorption of the first layer of argon on graphite (*) F. Millot Laboratoire des Composés non déterminé des isothermes d'adsorption d'argon sur le graphite entre 55 et 62 K. Nous proposons une interprétation de nos résultats. Abstract. 2014 I have determined a set of adsorption isotherms for argon

  11. Molecular Adsorption to LiMo3Se3 Nanowire Film Chemiresistors

    E-Print Network [OSTI]

    Chiang, Shirley

    Molecular Adsorption to LiMo3Se3 Nanowire Film Chemiresistors Xiubin Qi, Frank E. Osterloh,*, S. A that the temporal and steady-state resistance changes of the films depend on the time following the adsorption and on the number of molecules that adsorb to the nanowire films at a given pressure. The adsorption ability

  12. Ion adsorption and equilibrium distribution of charges in a cell of finite thickness

    E-Print Network [OSTI]

    Boyer, Edmond

    281 Ion adsorption and equilibrium distribution of charges in a cell of finite thickness G. Barbero-consistente, on évalue la distribution d'équilibre de charges dans une cellule d'épaisseur finie, en présence d'adsorption surface est évaluée, en étendant le problème classique d'adsorption de Langmuir aux situations loin du

  13. Surface Adsorption Isotherms and Surface Excess Densities of n-Butane in Silicalite-1

    E-Print Network [OSTI]

    Kjelstrup, Signe

    Surface Adsorption Isotherms and Surface Excess Densities of n-Butane in Silicalite-1 Isabella 27, 2008. ReVised Manuscript ReceiVed NoVember 13, 2008 We present isotherms for the adsorption of n were considered: a flat surface having only one adsorption site and a surface with a zigzag texture

  14. Adsorption and oxidation of fluoroquinolone antibacterial agents and structurally related amines with goethite

    E-Print Network [OSTI]

    Huang, Ching-Hua

    Adsorption and oxidation of fluoroquinolone antibacterial agents and structurally related amines adsorbed under the experimental conditions. The adsorption isotherms fitted well to the Langmuir model. Adsorption was accompanied by slow oxidation of the FQs (except for flumequine) by goethite yielding a range

  15. Adsorption and Pattern Recognition of Polymers at Complex Surfaces with Attractive Stripelike Motifs

    E-Print Network [OSTI]

    Bachmann, Michael

    Adsorption and Pattern Recognition of Polymers at Complex Surfaces with Attractive Stripelike diagram of polymer adsorption at substrates with attractive stripelike patterns in the parameter space spanned by the adsorption affinity of the stripes and temperature. Results were obtained by extensive

  16. CHALEUR D'ADSORPTION DES GAZ PAR LE CHARBON A BASSE TEMPERATURE (-183) Par REN LEPOINTE.

    E-Print Network [OSTI]

    Boyer, Edmond

    CHALEUR D'ADSORPTION DES GAZ PAR LE CHARBON A BASSE TEMPERATURE (- 183°) Par RENÉ LEPOINTE. Elève au début de l'adsorption que par la suite. L'hydrogène donne un phénomène thermique. Introduction. - De très nombreuses recherches ont été faites sur l'adsorption des gaz par le charbon de bois

  17. Phosphorus Adsorption-Desorption Characteristics of Two Soils Utilized for Disposal of Animal Wastes1

    E-Print Network [OSTI]

    Florida, University of

    Phosphorus Adsorption-Desorption Characteristics of Two Soils Utilized for Disposal of Animal was to determine the effect of animal waste loading rates on P adsorption-desorption characteristics of two soils to a Norfolk soil decreased adsorption capacity of the soil and increased soluble P (in 0.01A/ CaCU), acid

  18. Gas adsorption on a C60 monolayer R. A. Trasca,1

    E-Print Network [OSTI]

    Krim, Jacqueline

    Gas adsorption on a C60 monolayer R. A. Trasca,1 M. W. Cole,2 T. Coffey,3 and J. Krim3 1 Institut received 24 February 2008; published 14 April 2008 The adsorption geometry of various gases on top of a C60. The adsorption potential exhibits strongly attractive sites which lead to a commensurate phase. The next

  19. CO2 Adsorption in Fe2(dobdc): A Classical Force Field Parameterized from Quantum Mechanical

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    CO2 Adsorption in Fe2(dobdc): A Classical Force Field Parameterized from Quantum Mechanical : 10.1021/jp500313j #12;Abstract Carbon dioxide adsorption isotherms have been computed for the Metal derived from quantum mechanical calculations has been used to model adsorption isotherms within a MOF

  20. Adsorption of Nucleic Acid Components on Rutile (TiO2) Surfaces

    E-Print Network [OSTI]

    Sverjensky, Dimitri A.

    Adsorption of Nucleic Acid Components on Rutile (TiO2) Surfaces H. James Cleaves II,1 Caroline M and horizontal gene transfer. The adsorption of mono-, oligo-, and polynucleotides and their components obtained from studies of other minerals. In contrast with recent studies of nucleotide adsorption on Zn

  1. Polymer adsorption on colloidal particles P. A. Pincus, C. J. Sandroff (*) and T. A. Witten, Jr.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    725 Polymer adsorption on colloidal particles P. A. Pincus, C. J. Sandroff (*) and T. A. Witten, Jr.S.A. (Reçu le 26 septembre 1983, accepté le 2 décembre 1983) Résumé. 2014 Nous considérons l'adsorption de au rayon de gyration des chaînes des polymères. L'adsorption a lieu lorsque « l'énergie d

  2. Adsorption and onset of lubrication by a double-chained cationic surfactant on silica

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Adsorption and onset of lubrication by a double-chained cationic surfactant on silica surfaces cationic surfactant has been investigated at high normal contact pressures. Comparison with adsorption to this dispersion to7 participate in lubrication. However, it is well known that adsorption of sur-8 factants

  3. Adsorption of Ruthenium and Iron Metallocenes on Silica: A Solid-State NMR Study

    E-Print Network [OSTI]

    Bluemel, Janet

    Adsorption of Ruthenium and Iron Metallocenes on Silica: A Solid- State NMR Study Kyle J. Cluff on silica surfaces by grinding the polycrystalline materials with silica. The adsorption process proceeds dry silica surface, wet and TMS- capped silica have been used as supports. The adsorption leads

  4. Adsorption of colloidal particles by Brownian dynamics simulation: Kinetics and surface structures

    E-Print Network [OSTI]

    Gray, Jeffrey J.

    Adsorption of colloidal particles by Brownian dynamics simulation: Kinetics and surface structures or nanoscale particulate systems. We develop a new technique for simulating colloidal adsorption processes-limited adsorption. Long-time kinetics fit a 2/3-power law form P. Schaaf, A. Johner, and J. Talbot, Phys. Rev. Lett

  5. Adsorption of comb copolymers on weakly attractive solid surfaces A. Strioloa

    E-Print Network [OSTI]

    Jayaraman, Arthi

    Adsorption of comb copolymers on weakly attractive solid surfaces A. Strioloa Department In this work continuum and lattice Monte Carlo simulation methods are used to study the adsorption of linear. At infinite dilution the presence of short side chains promotes the adsorption of polymers favoring both

  6. Transient Adsorption and Desorption in Micrometer Scale Matthias K. Gobbert,a,

    E-Print Network [OSTI]

    Gobbert, Matthias K.

    Transient Adsorption and Desorption in Micrometer Scale Features Matthias K. Gobbert,a, *,z Samuel such as those found in integrated circuit fabrication. We focus on the adsorption and desorption of one species no adjustable parameters; the assumptions are detailed. Adsorption and desorption reactions and rates

  7. Adsorption of Proteins to Hydrophobic Sites on Mixed Self-Assembled Monolayers

    E-Print Network [OSTI]

    Prentiss, Mara

    Adsorption of Proteins to Hydrophobic Sites on Mixed Self-Assembled Monolayers Emanuele Ostuni adsorption of proteins at solid-liquid interfaces. Detailed results were obtained for -galactosidase is used to rationalize the adsorption; this model, although very approximate, helps to interpret

  8. Water adsorption on alpha-Fe2O3(0001) at near ambient conditions

    E-Print Network [OSTI]

    Yamamoto, Susumu

    2010-01-01T23:59:59.000Z

    Physical Chemistry Water adsorption on at n e a r a m b i eR U N N I N G H E A D : Water adsorption on a-Fe O (0001) *hydroxylation and water adsorption on a-Fe O (0001) at water

  9. Competitive Adsorption and Ordered Packing of Counterions near Highly Charged Surfaces: From

    E-Print Network [OSTI]

    Li, Bo

    Competitive Adsorption and Ordered Packing of Counterions near Highly Charged Surfaces: From Mean Competitive adsorption of counterions of multiple species to charged surfaces is studied by a size surface. It is found that, for a low surface charge density, the adsorption of ions with a higher valence

  10. Adsorption studies of Mo and V onto ferrihydrite *, L. G. BENNING

    E-Print Network [OSTI]

    Benning, Liane G.

    Adsorption studies of Mo and V onto ferrihydrite L. BRINZA 1, *, L. G. BENNING 1 AND P. J. STATHAM-sorbate experiments, 100% adsorption was observed at pH values below 6 and 8, respectively. Above the point of zero charge (PZC = 7.97) of FHY, the adsorption efficiency for Mo dropped dramatically (20% at pH 8) while V

  11. Cellulase Adsorption and Relationship to Features of Corn Stover Solids Produced by

    E-Print Network [OSTI]

    California at Riverside, University of

    ARTICLE Cellulase Adsorption and Relationship to Features of Corn Stover Solids Produced by Leading to sugars for fermentation to ethanol or other products, enzyme adsorption and its relationship to substrate acid, lime, and sulfur dioxide (SO2) pretreat- ments were measured at 48C. Langmuir adsorption para

  12. Adsorption of Sodium Dodecyl Sulfate on Functionalized Graphene Measured by Conductometric Titration

    E-Print Network [OSTI]

    Aksay, Ilhan A.

    Adsorption of Sodium Dodecyl Sulfate on Functionalized Graphene Measured by Conductometric States ABSTRACT: We report on the adsorption of sodium dodecyl sulfate (SDS) onto functionalized graphene-to- oxygen ratio of 18, monolayer adsorption of SDS on FGS reaches full surface coverage by 12 M SDS

  13. Polymer adsorption onto random planar surfaces: Interplay of polymer and surface correlations

    E-Print Network [OSTI]

    Schmid, Friederike

    Polymer adsorption onto random planar surfaces: Interplay of polymer and surface correlations, Universit¨atsstraße 25, D-33615 Bielefeld, Germany We study the adsorption of homogeneous or heterogeneous a variational reference system ap- proach. As a main result, we derive simple equations for the adsorption

  14. Reduced adsorption of caesium on clay minerals caused by various humic substances

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Reduced adsorption of caesium on clay minerals caused by various humic substances C. Dumat, S!ect of the addition of various humic substances on the adsorption of caesium on two mineral clays has been studied the amount of humic substance adsorbed and the decrease in Cs adsorption when all complexes were considered

  15. ccsd-00004163,version1-4Feb2005 Free Energy Formalism for Particle Adsorption

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ccsd-00004163,version1-4Feb2005 Free Energy Formalism for Particle Adsorption Pierre Gosselin1 of particles adsorption is investigated theoretically. The model relies on a free energy formulation which of potentially adsorbed particles is very high. As an application we consider the equilibrium physical adsorption

  16. Adsorption du mthanol par la montmorillonite (1) Faza ANNABI-BERGAYA

    E-Print Network [OSTI]

    Boyer, Edmond

    Adsorption du méthanol par la montmorillonite (1) Faïza ANNABI-BERGAYA C.N.R.S., Centre de Cedex. RÉSUMÉ L'adsorption du méthanol gazeux par des montmorillonites Li, Na, Ba et Ca, a été 1. R. Adsorption, Le recoupement des résultats a permis de mettre en évidence les points suivants

  17. Selective adsorption of block copolymers on patterned surfaces Maria Sabaye Moghaddama

    E-Print Network [OSTI]

    Chan, Hue Sun

    Selective adsorption of block copolymers on patterned surfaces Maria Sabaye Moghaddama and Hue Sun September 2006; published online 27 October 2006 Adsorption of copolymers on patterned surfaces is studied and the sharpness of the adsorption transition are investigated by comparing three different models of copolymer

  18. Hydrogen adsorption on Pd/TiFe (110) surface S.E. Kulkovaa

    E-Print Network [OSTI]

    Kim, Jai Sam

    Hydrogen adsorption on Pd/TiFe (110) surface S.E. Kulkovaa , S.V. Eremeeva,b,*, V.E. Egorushkinc February 2003 by E.L. Ivchenko Abstract Adsorption of hydrogen on the TiFe (110) surface covered the local density approximation. Influence of palladium coating to adsorption properties of the TiFe (110

  19. STREAMLINE is a range of adsorbents and columns designed for expanded bed adsorption.

    E-Print Network [OSTI]

    Lebendiker, Mario

    STREAMLINE is a range of adsorbents and columns designed for expanded bed adsorption. In this new for expanded bed adsorption. They allow: · Capture of biomolecules directly from unclarified feedstocks · High and mechanical stability Principle of expanded bed adsorption The bed is expanded by the upward liquid flow

  20. Adsorption of Ethylene Glycol Vapor on r-Al2O3 (0001) and Amorphous

    E-Print Network [OSTI]

    Adsorption of Ethylene Glycol Vapor on r-Al2O3 (0001) and Amorphous SiO2 Surfaces: Observation W. 18th Avenue, Columbus, Ohio 43210 Vapor adsorption is an important process influencing the migration and the fates of many organic pollutants in the environment. In this study, adsorption of ethylene

  1. Individual and competitive adsorption of phosphate and arsenate on goethite in artificial seawater

    E-Print Network [OSTI]

    Long, Bernard

    Individual and competitive adsorption of phosphate and arsenate on goethite in artificial seawater and arsenate adsorption on goethite was studied in single batch experiments at 25 jC upon the addition of Ca2 predicts the phosphate and arsenate adsorption behaviours in the PO4 ­SO4 ­goethite and AsO4 ­Ca­goethite

  2. Kinetics and Mechanisms of Sulfate Adsorption/Desorption on Goethite Using Pressure-Jump Relaxation

    E-Print Network [OSTI]

    Sparks, Donald L.

    Kinetics and Mechanisms of Sulfate Adsorption/Desorption on Goethite Using Pressure-Jump Relaxation Peng Chu Zhang* and Donald L. Sparks ABSTRACT Sulfate adsorption/desorption on goethite (Fe indicated that adsorption decreased with increased pH of the goethite suspension. The triple-layer model fit

  3. Infrared reflection absorption spectroscopy studies of CO adsorption on titania thin films and gold clusters supported on titania

    E-Print Network [OSTI]

    White, Kevin Rodney

    1999-01-01T23:59:59.000Z

    for these experiments was designed and constructed by Goodman group members. The QMS used is a UTI model 100C quadrupole mass spectrometer. This QMS has a sensitivity of 2. 7 x 10 amp/Torr and can scan from 1-300arnu. The gain is measured to be 1. 477 x 10... Science (1998). M. Valden, S. Pak, X. Lai, and D. W. Goodman, Catal. Let. 56, 7 (1998). ' M. Valden and D. W. Goodman, Israel. J. Chem. submitted. "T. Hoshio, K. Tanaka and M. Haruta, J. Catal. 178, 566 (1998). ' F. M. Hoffman, Surf. Sci. Rep. 3...

  4. Bose-Einstein Condensates in Superlattices

    E-Print Network [OSTI]

    Mason A. Porter; P. G. Kevrekidis

    2005-07-28T23:59:59.000Z

    We consider the Gross-Pitaevskii (GP) equation in the presence of periodic and quasiperiodic superlattices to study cigar-shaped Bose-Einstein condensates (BECs) in such potentials. We examine spatially extended wavefunctions in the form of modulated amplitude waves (MAWs). With a coherent structure ansatz, we derive amplitude equations describing the evolution of spatially modulated states of the BEC. We then apply second-order multiple scale perturbation theory to study harmonic resonances with respect to a single lattice wavenumber as well as ultrasubharmonic resonances that result from interactions of both wavenumbers of the superlattice. In each case, we determine the resulting system's equilibria, which represent spatially periodic solutions, and subsequently examine the stability of the corresponding solutions by direct simulations of the GP equation, identifying them as typically stable solutions of the model. We then study subharmonic resonances using Hamiltonian perturbation theory, tracing robust, spatio-temporally periodic patterns.

  5. Solitonic axion condensates modeling dark matter halos

    SciTech Connect (OSTI)

    Castañeda Valle, David, E-mail: casvada@gmail.com; Mielke, Eckehard W., E-mail: ekke@xanum.uam.mx

    2013-09-15T23:59:59.000Z

    Instead of fluid type dark matter (DM), axion-like scalar fields with a periodic self-interaction or some truncations of it are analyzed as a model of galaxy halos. It is probed if such cold Bose–Einstein type condensates could provide a viable soliton type interpretation of the DM ‘bullets’ observed by means of gravitational lensing in merging galaxy clusters. We study solitary waves for two self-interacting potentials in the relativistic Klein–Gordon equation, mainly in lower dimensions, and visualize the approximately shape-invariant collisions of two ‘lump’ type solitons. -- Highlights: •An axion model of dark matter is considered. •Collision of axion type solitons are studied in a two dimensional toy model. •Relations to dark matter collisions in galaxy clusters are proposed.

  6. INCREASED LEAD ABSORPTION AND LEAD POISONING

    E-Print Network [OSTI]

    INCREASED LEAD ABSORPTION AND LEAD POISONING IN YOUNG CHILDREN A STATDIE:"IT BY THE CEJde slnt:t! the Surgeon GenerJi's Statement. "~edicJI Aspects of Childhood Lead POisoning," was issued:ld absorption Jnd lead poisoning. Such JCtivities for children will continue to be necessary until sources

  7. Broadband solar absorption enhancement via periodic

    E-Print Network [OSTI]

    Province, 230009, P. R. China. Solution processed colloidal quantum dot (CQD) solar cells have greatBroadband solar absorption enhancement via periodic nanostructuring of electrodes Michael M. Adachi demonstrate a bottom- illuminated periodic nanostructured CQD solar cell that enhances broadband absorption

  8. Lyman-alpha Absorption from Heliosheath Neutrals

    E-Print Network [OSTI]

    Brian E. Wood; Vladislav V. Izmodenov; Jeffrey L. Linsky; Yury G. Malama

    2006-11-30T23:59:59.000Z

    We assess what information HST observations of stellar Ly-alpha lines can provide on the heliosheath, the region of the heliosphere between the termination shock and heliopause. To search for evidence of heliosheath absorption, we conduct a systematic inspection of stellar Ly-alpha lines reconstructed after correcting for ISM absorption (and heliospheric/astrospheric absorption, if present). Most of the stellar lines are well centered on the stellar radial velocity, as expected, but the three lines of sight with the most downwind orientations relative to the ISM flow (Chi1 Ori, HD 28205, and HD 28568) have significantly blueshifted Ly-alpha lines. Since it is in downwind directions where heliosheath absorption should be strongest, the blueshifts are almost certainly caused by previously undetected heliosheath absorption. We make an initial comparison between the heliosheath absorption and the predictions of a pair of heliospheric models. A model with a complex multi-component treatment of plasma within the heliosphere predicts less absorption than a model with a simple single-fluid treatment, which leads to better agreement with the data. Finally, we find that nonplanetary energetic neutral atom (ENA) fluxes measured by the ASPERA-3 instrument on board Mars Express, which have been interpreted as being from the heliosheath, are probably too high to be consistent with the relative lack of heliosheath absorption seen by HST. This would argue for a local interplanetary source for these ENAs instead of a heliosheath source.

  9. absorption: Topics by E-print Network

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

    absorption First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Planning of Axiom Absorptions CiteSeer...

  10. acid-formaldehyde condensation reactions: Topics by E-print Network

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

    of the Bose-Einstein condensation mechanism for low-energy nuclear reaction (LENR) and transmutation processes in condensed matters. For the case of deutron-lithium...

  11. Optimization of hybrid-water/air-cooled condenser in an enhanced...

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

    Optimization of hybrid-waterair-cooled condenser in an enhanced turbine geothermal ORC system Optimization of hybrid-waterair-cooled condenser in an enhanced turbine geothermal...

  12. atomic bose-einstein condensate: Topics by E-print Network

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

    by periodically replenishing a condensate held in an optical dipole trap with new condensates delivered using optical tweezers. The source contained more than 1 106 atoms at all...

  13. Novel absorption detection techniques for capillary electrophoresis

    SciTech Connect (OSTI)

    Xue, Y.

    1994-07-27T23:59:59.000Z

    Capillary electrophoresis (CE) has emerged as one of the most versatile separation methods. However, efficient separation is not sufficient unless coupled to adequate detection. The narrow inner diameter (I.D.) of the capillary column raises a big challenge to detection methods. For UV-vis absorption detection, the concentration sensitivity is only at the {mu}M level. Most commercial CE instruments are equipped with incoherent UV-vis lamps. Low-brightness, instability and inefficient coupling of the light source with the capillary limit the further improvement of UV-vis absorption detection in CE. The goals of this research have been to show the utility of laser-based absorption detection. The approaches involve: on-column double-beam laser absorption detection and its application to the detection of small ions and proteins, and absorption detection with the bubble-shaped flow cell.

  14. Adsorption and Strain: The CO2-Induced Swelling of Coal

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Adsorption and Strain: The CO2-Induced Swelling of Coal M. Vandamme1 , L. Brochard2 , B. Lecampion3.07.014 #12;Abstract Enhanced coal bed methane recovery (ECBM) consists in injecting carbon dioxide in coal gets adsorbed at the surface of the coal pores, which causes the coal to swell. This swelling

  15. Mechanical effect of adsorption Carbon sequestration and swelling of coal

    E-Print Network [OSTI]

    Boyer, Edmond

    Mechanical effect of adsorption Carbon sequestration and swelling of coal Laurent BROCHARD on Carbon Capture and Sequestration (2005)) Pressure,psi Time, year Pressure 0 500 1000 1500 2000 2500 Rate Université Paris-Est. Laboratoire Navier (UMR CNRS 8205). Ecole des Ponts ParisTech CONTEXT - CARBON

  16. Experimental Study of Water Vapor Adsorption on Geothermal

    E-Print Network [OSTI]

    Stanford University

    SGP-TR-148 Experimental Study of Water Vapor Adsorption on Geothermal Reservoir Rocks Shubo Shang Geothermal Program under Department of Energy Grant No. DE-FG07-90IDI2934,and by the Department of Petroleum Engineering, Stanford University Stanford Geothermal Program Interdisciplinary Research in Engineering

  17. Adsorption, desorption, and stabilization of arsenic on aluminum substituted ferrihydrite

    E-Print Network [OSTI]

    Masue, Yoko

    2006-04-12T23:59:59.000Z

    systems were evaluated by studying their mineralogy, stability, and As adsorption and desorption behavior. The broad XRD peaks revealed that Al was substituted into the ferrihydrite structure and that this was the only major product up to about a 2:8 Al...

  18. Hydrogen adsorption in thin films of Prussian blue analogue

    SciTech Connect (OSTI)

    Yang, Dali [Los Alamos National Laboratory; Ding, Vivian [Los Alamos National Laboratory; Luo, Junhua [Los Alamos National Laboratory; Currier, Robert P [Los Alamos National Laboratory; Obrey, Steve [Los Alamos National Laboratory; Zhao, Yusheng [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    Quartz crystal microbalance with dissipation (QCM-D) measurement was used to investigate the kinetics of the molecular hydrogen adsorption into thin films of prussian blue analogues - Cu{sub 3}[Co(CN){sub 6}]{sub 2} at ambient conditions. Although the equilibrium adsorption seems to be independent of the thickness, the adsorption rate substantially decreases with the thickness of the films. In addition, the reversibility of H{sub 2} adsorption into the Cu{sub 3}[Co(CN){sub 6}]{sub 2} films was investigated. The results indicate that the Cu{sub 3}[Co(CN){sub 6}]{sub 2} maily interacts with H{sub 2} molecules physically. The highest H{sub 2} uptake by the Cu{sub 3}[Co(CN){sub 6}]{sub 2} films is obtained when the gas phase is stagnant inside the testing cell. However, the unusual high H{sub 2} uptake obtained from the QCM-D measurement makes us question how reliable this analytic methodology is.

  19. A fast algorithm for random sequential adsorption of discs

    E-Print Network [OSTI]

    Jian-Sheng WANG

    1994-02-17T23:59:59.000Z

    An efficient algorithm for random sequential adsorption of hard discs in two dimensions is implemented. A precise value for the coverage is obtained: theta(infty) = 0.547069. The asymptotic law theta(t) = theta(infty) - ct^{-1/2} is verified to a high accuracy. Pair correlation function is analyzed.

  20. Mid- and Far-Infrared Reflection/Absorption Spectroscopy (IRAS) Studies of NO on Rh Single Crystal Surfaces

    SciTech Connect (OSTI)

    Peden, Charles HF; He, Ting; Pilling, M.; Hirschmugl, Carol J.; Gardner, P.

    2001-02-01T23:59:59.000Z

    The NO/CO reaction over Rh metal in automobile catalytic converters is critical to the control of emissions of these pollutant molecules. As part of a program to determine the elementary mechanism(s) of this reaction, we have been performing mid- and far-infrared reflection/absorption spectroscopic (IRAS) measurements of the adsorption and co-adsorption and co-adsorption of NO and CO on Rh single crystal surfaces. Of particular interest is the low-frequency range of the IRAS spectra where we hoped to observe features due to metal-N stretching and/or bending vibrational motions. In particular, we hoped to obtain information regarding the site-requirements for the dissociation of the NO molecule on various Rh single crystal surfaces. An important result from our earlier work is that the selectivity of the reaction for the two nitrogen-containing products, N2 and N2O, is a strong function of the Rh surface structure. On the basis of ancillary data, we suggested that the location of adsorbed NO and N-atoms (formed from dissociation of adsorbed NO) on various Rh surfaces could, perhaps account for the selectivity differences.