National Library of Energy BETA

Sample records for determination catalytic transformation

  1. Metal Vinylidenes and Allenylidenes as Intermediates in Catalytic Transformations

    E-Print Network [OSTI]

    Stoltz, Brian M.

    Metal Vinylidenes and Allenylidenes as Intermediates in Catalytic Transformations Literature Group Key references: Metal Vinylidenes in Catalysis. Bruneau, C.; Dixneuf, P. H. Acc. Chem. Res. 1999, 32.; Pinkerton, A. B. Chem. Rev. 2001, 101, 2067-2096. Outline: ∑ Definitions ∑ Metal vinylidene generation

  2. ForReview.Confidential-ACS Catalytic Transformation of 1,3,5 -Trimethyl Benzene over USY Zeolite

    E-Print Network [OSTI]

    Al-Khattaf, Sulaiman

    ForReview.Confidential-ACS Catalytic Transformation of 1,3,5 -Trimethyl Benzene over USY Zeolite Catalytic Transformation of 1,3,5 -Trimethyl Benzene over USY Zeolite Catalyst Nasir M. Tukur and SulaimanTMB, disproportionation. May 2007 Keywords: Trimethyl benzene, isomerization, disproportionation

  3. Principles of water oxidation and O2-based hydrocarbon transformation by multinuclear catalytic sites

    SciTech Connect (OSTI)

    Musaev, Djamaladdin G [Chemistry, Emory University; Hill, Craig L [Chemistry, Emory University; Morokuma, Keiji [Chemistry, Emory University

    2014-10-28

    Abstract The central thrust of this integrated experimental and computational research program was to obtain an atomistic-level understanding of the structural and dynamic factors underlying the design of catalysts for water oxidation and selective reductant-free O2-based transformations. The focus was on oxidatively robust polyoxometalate (POM) complexes in which a catalytic active site interacts with proximal metal centers in a synergistic manner. Thirty five publications in high-impact journals arose from this grant. I. Developing an oxidatively and hydrolytically stable and fast water oxidation catalyst (WOC), a central need in the production of green fuels using water as a reductant, has proven particularly challenging. During this grant period we have designed and investigated several carbon-free, molecular (homogenous), oxidatively and hydrolytically stable WOCs, including the Rb8K2[{Ru4O4(OH)2(H2O)4}(?-SiW10O36)2]∑25H2O (1) and [Co4(H2O)2(?-PW9O34)2]10- (2). Although complex 1 is fast, oxidatively and hydrolytically stable WOC, Ru is neither abundant nor inexpensive. Therefore, development of a stable and fast carbon-free homogenous WOC, based on earth-abundant elements became our highest priority. In 2010, we reported the first such catalyst, complex 2. This complex is substantially faster than 1 and stable under homogeneous conditions. Recently, we have extended our efforts and reported a V2-analog of the complex 2, i.e. [Co4(H2O)2(?-VW9O34)2]10- (3), which shows an even greater stability and reactivity. We succeeded in: (a) immobilizing catalysts 1 and 2 on the surface of various electrodes, and (b) elucidating the mechanism of O2 formation and release from complex 1, as well as the Mn4O4L6 ďcubaneĒ cluster. We have shown that the direct O-O bond formation is the most likely pathway for O2 formation during water oxidation catalyzed by 1. II. Oxo transfer catalysts that contain two proximal and synergistically interacting redox active metal centers in the active site form another part of considerable interest of our grant because species with such sites [including methane monooxygenase (MMO) and more] are some of the most effective oxygenase catalysts known. Our team conducted the following research on ?-M2-Keggin complexes: (a) investigated stability of the trimer [{Fe3(OH)3(H2O)2}3(?-SiW10O36)3]15-, 4, in water, and developed the chemistry and catalysis of the di-iron centered POM, [?(1,2)-SiW10{Fe(OH)}2O38]6-, 5, in organic solvents (Figure 2). We also study the thermodynamic and structural stability of ?-M2-Keggin in aqueous media for different Mís (d-electron metals). We have defined two structural classes of POMs with proximally bound d-electron metal centers. We refer to these structural isomers of the {?-M2SiW10} family of POMs as ďin-pocketĒ and ďout-of pocketĒ. We have elucidated the factors controlling the structure and stability of the V, Fe, Ru, Tc, Mo and Rh derivatives of [(SiO4)M2(OH)2W10O32]4- using a range of computational tools. We have: (a) demonstrated that heteroatom X in these polyanions may function as an ďinternal switchĒ for defining the ground electronic states and, consequently, the reactivity of the ?-M2-Keggin POM complexes; (b) elucidated reactivity of divacant lacunary species and polyperoxotungstates (PPTs), {Xn+O4[WO(O2)2]4}n-, which could be degradation products of ?-M2-Keggin complexes in aqueous media; (c) elucidated the role of the POM ligand in stabilization of {Ru2} and {(Ru-oxo)2} fragments in the reactant and product of the reaction of {?-[(Xn+O4)Ru2(OH)2W10O32]}(8-n)- (where X = Si4+, P5+ and S6+) with O2, and (d) the mechanisms of olefin epoxidation catalyzed by these di-d-transition metal substituted and divacant lacunary ?-M2-Keggin complexes. III. Complementing the efforts presented above was the development of less time-consuming but reasonably accurate computational methods allowing one to explore more deeply large catalytic systems. We developed Reactive Force Field (ReaxFF) to study interaction of the targeted POMs with water, pro

  4. Rapid determination of particle velocity from space-time images using the Radon transform

    E-Print Network [OSTI]

    Cauwenberghs, Gert

    Rapid determination of particle velocity from space-time images using the Radon transform Patrick J an alternative method that makes use of the Radon transform to calculate the velocity of streaming particles. We the velocity that makes use of the Radon transform (Deans 1983; Averbuch et al. 2001), which takes a set

  5. FOURIER-TRANSFORM ANALYSIS OF NORMAL PHOTOELECTRON DIFFRACTION DATA FOR SURFACE-STRUCTURE DETERMINATION

    E-Print Network [OSTI]

    Hussain, Z.

    2013-01-01

    Physical Review Letters FOURIER-TRANSFORM ANALYSIS OF NORMAL0 eV. (b) Magnitude of the Fourier transform IF(r)l accord∑3. l.94A and V 5 eV. Fourier-transform derived distances ZF

  6. FOURIER-TRANSFORM ANALYSIS OF NORMAL PHOTOELECTRON DIFFRACTION DATA FOR SURFACE-STRUCTURE DETERMINATION

    E-Print Network [OSTI]

    Hussain, Z.

    2013-01-01

    Academy of Sciences USA FOURIER-TRANSFORM ANALYSIS OF NORMALeV. (b) Magnitude of the Fourier transform IF(r)l accordingV 0 = 5 eV. Figure 3. Fourier-transform derived distances ZF

  7. Transformation Composition Transformational Geometry

    E-Print Network [OSTI]

    Ferguson, Thomas S.

    Isomotries Transformation Composition Congruence Transformational Geometry Christopher Ograin Christopher Ograin Transformational Geometry #12;Isomotries Transformation Composition Congruence Geo Transformational Geometry #12;Isomotries Transformation Composition Congruence Definitions Transformation

  8. CATALYTIC BIOMASS LIQUEFACTION

    E-Print Network [OSTI]

    Ergun, Sabri

    2013-01-01

    LBL-11 019 UC-61 CATALYTIC BIOMASS LIQUEFACTION Sabri Ergun,Catalytic Liquefaction of Biomass,n M, Seth, R. Djafar, G.of California. CATALYTIC BIOMASS LIQUEFACTION QUARTERLY

  9. Catalytic Coherence

    E-Print Network [OSTI]

    Johan Aberg

    2014-10-20

    Due to conservation of energy we cannot directly turn a quantum system with a definite energy into a superposition of different energies. However, if we have access to an additional resource in terms of a system with a high degree of coherence, as for standard models of laser light, we can overcome this limitation. The question is to what extent coherence gets degraded when utilized. Here it is shown that coherence can be turned into a catalyst, meaning that we can use it repeatedly without ever diminishing its power to enable coherent operations. This finding stands in contrast to the degradation of other quantum resources, and has direct consequences for quantum thermodynamics, as it shows that latent energy that may be locked into superpositions of energy eigenstates can be released catalytically.

  10. Catalytic reactor

    DOE Patents [OSTI]

    Aaron, Timothy Mark (East Amherst, NY); Shah, Minish Mahendra (East Amherst, NY); Jibb, Richard John (Amherst, NY)

    2009-03-10

    A catalytic reactor is provided with one or more reaction zones each formed of set(s) of reaction tubes containing a catalyst to promote chemical reaction within a feed stream. The reaction tubes are of helical configuration and are arranged in a substantially coaxial relationship to form a coil-like structure. Heat exchangers and steam generators can be formed by similar tube arrangements. In such manner, the reaction zone(s) and hence, the reactor is compact and the pressure drop through components is minimized. The resultant compact form has improved heat transfer characteristics and is far easier to thermally insulate than prior art compact reactor designs. Various chemical reactions are contemplated within such coil-like structures such that as steam methane reforming followed by water-gas shift. The coil-like structures can be housed within annular chambers of a cylindrical housing that also provide flow paths for various heat exchange fluids to heat and cool components.

  11. Evaluating Transformer Losses†

    E-Print Network [OSTI]

    Grun, R. L. Jr.

    1989-01-01

    This paper outlines how to determine what transformer losses cost and how to evaluate transformer bids to optimize the investment....

  12. CATALYTIC LIQUEFACTION OF BIOMASS

    E-Print Network [OSTI]

    Seth, Manu

    2012-01-01

    liquid Fuels from Biomass: "Catalyst Screening and KineticUC-61 (l, RCO osn CDL or BIOMASS CATALYTIC LIQUEFACTION ManuCATALYTIC LIQUEFACTION OF BIOMASS Manu Seth, Roger Djafar,

  13. CATALYTIC BIOMASS LIQUEFACTION

    E-Print Network [OSTI]

    Ergun, Sabri

    2013-01-01

    Solvent Systems Catalystic Biomass Liquefaction Investigatereactor Product collection Biomass liquefaction process12-13, 1980 CATALYTIC BIOMASS LIQUEFACTION Sabri Ergun,

  14. CLEAN CAST STEEL TECHNOLOGY: DETERMINATION OF TRANSFORMATION DIAGRAMS FOR DUPLEX STAINLESS STEEL.

    SciTech Connect (OSTI)

    Chumbley. L., S.

    2005-09-18

    Duplex stainless steels (DSS) constitute both ferrite and austenite as a matrix. Such a microstructure confers a high corrosion resistance with favorable mechanical properties. However, intermetallic phases such as sigma (√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Į√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Ā√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬≥) and chi (√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Į√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Ā√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬£) can also form during casting or high-temperature processing and can degrade the properties of the DSS. This research was initiated to develop time-temperature-transformation (TTT) and continuous-cooling- transformation (CCT) diagrams of two types of cast duplex stainless steels, CD3MN (Fe 22Cr-5Ni-Mo-N) and CD3MWCuN (Fe-25Cr-7Ni-Mo-W-Cu-N), in order to understand the time and temperature ranges for intermetallic phase formation. The alloys were heat treated isothermally or under controlled cooling conditions and then characterized using conventional metallographic methods that included tint etching, and also using electron microscopy (SEM, TEM) and wavelength dispersive spectroscopy (WDS). The kinetics of intermetallic-phase (√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Į√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Ā√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬≥ + √?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Į√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Ā√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬£) formation were analyzed using the Johnson-Mehl-Avrami (JMA) equation in the case of isothermal transformations and a modified form of this equation in the case of continuous cooling transformations, The rate of intermetallic-phase formation was found to be much faster in CD3MWCuN than CD3MN due mainly to differences in the major alloying contents such as Cr, Ni and Mo. To examine in more detail the effects of these elements of the phase stabilities, a series of eight steel castings was designed with the Cr, Ni and Mo contents systematically varied with respect to the nominal composition of CD3MN. The effects of varying the contents of alloying additions on the formation of intermetallic phases were also studied computationally using the commercial thermodynamic software package, Thermo-Calc. In general, √?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Į√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬Ā√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬?√?¬≥ was stabilized with increasing Cr addition and by increasing Mo addition. However, a delicate balance among Ni and other minor elements such as N and Si also exists. Phase equilibria in DSS can be affected by local composition fluctuations in the cast alloy. This may cause discrepancy between thermodynamic prediction and experimental observation.

  15. Rich catalytic injection

    DOE Patents [OSTI]

    Veninger, Albert (Coventry, CT)

    2008-12-30

    A gas turbine engine includes a compressor, a rich catalytic injector, a combustor, and a turbine. The rich catalytic injector includes a rich catalytic device, a mixing zone, and an injection assembly. The injection assembly provides an interface between the mixing zone and the combustor. The injection assembly can inject diffusion fuel into the combustor, provides flame aerodynamic stabilization in the combustor, and may include an ignition device.

  16. Catalytic cracking process

    SciTech Connect (OSTI)

    Lokhandwala, Kaaeid A.; Baker, Richard W.

    2001-01-01

    Processes and apparatus for providing improved catalytic cracking, specifically improved recovery of olefins, LPG or hydrogen from catalytic crackers. The improvement is achieved by passing part of the wet gas stream across membranes selective in favor of light hydrocarbons over hydrogen.

  17. Catalytic distillation process

    DOE Patents [OSTI]

    Smith, Jr., Lawrence A. (Bellaire, TX)

    1982-01-01

    A method for conducting chemical reactions and fractionation of the reaction mixture comprising feeding reactants to a distillation column reactor into a feed zone and concurrently contacting the reactants with a fixed bed catalytic packing to concurrently carry out the reaction and fractionate the reaction mixture. For example, a method for preparing methyl tertiary butyl ether in high purity from a mixed feed stream of isobutene and normal butene comprising feeding the mixed feed stream to a distillation column reactor into a feed zone at the lower end of a distillation reaction zone, and methanol into the upper end of said distillation reaction zone, which is packed with a properly supported cationic ion exchange resin, contacting the C.sub.4 feed and methanol with the catalytic distillation packing to react methanol and isobutene, and concurrently fractionating the ether from the column below the catalytic zone and removing normal butene overhead above the catalytic zone.

  18. Catalytic nanoporous membranes

    DOE Patents [OSTI]

    Pellin, Michael J; Hryn, John N; Elam, Jeffrey W

    2013-08-27

    A nanoporous catalytic membrane which displays several unique features Including pores which can go through the entire thickness of the membrane. The membrane has a higher catalytic and product selectivity than conventional catalysts. Anodic aluminum oxide (AAO) membranes serve as the catalyst substrate. This substrate is then subjected to Atomic Layer Deposition (ALD), which allows the controlled narrowing of the pores from 40 nm to 10 nm in the substrate by deposition of a preparatory material. Subsequent deposition of a catalytic layer on the inner surfaces of the pores reduces pore sizes to less than 10 nm and allows for a higher degree of reaction selectivity. The small pore sizes allow control over which molecules enter the pores, and the flow-through feature can allow for partial oxidation of reactant species as opposed to complete oxidation. A nanoporous separation membrane, produced by ALD is also provided for use in gaseous and liquid separations. The membrane has a high flow rate of material with 100% selectivity. Also provided is a method for producing a catalytic membrane having flow-through pores and discreet catalytic clusters adhering to the inside surfaces of the pores.

  19. A Photosynthetic Hydrogel for Catalytic Hydrogen Production ...

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

    A Photosynthetic Hydrogel for Catalytic Hydrogen Production Home > Research > ANSER Research Highlights > A Photosynthetic Hydrogel for Catalytic Hydrogen Production...

  20. Catalytic conversion of LPG

    SciTech Connect (OSTI)

    Pujado, P.R.; Vora, B.V.; Mowry, J.R.; Anderson, R.F.

    1986-01-01

    The low reactivity of light paraffins has long hindered their utilization as petrochemical feedstocks. Except for their use in ethylene crackers, LPG fractions have traditionally been consumed as fuel. New catalytic processes now being commercialized open new avenues for the utilization of LPG as sources of valuable petrochemical intermediates. This paper discusses processes for the dehydrogenation and aromatization of LPG.

  1. Challenges in the Selective Transformation of Biomass to Useful Chemical Intermediates and Materials

    E-Print Network [OSTI]

    Abolmaesumi, Purang

    highly hydroxylated biomass feedstocks into new chemical intermediates and thermoplastics. New scientific. We have developed new catalytic methods for transforming biomass feedstocks into new monomers

  2. Surface Structure and Catalytic $CO$ Oxidation Oscillations

    E-Print Network [OSTI]

    R. Danielak; A. Perera; M. Moreau; M. Frankowicz; R. Kapral

    1996-02-13

    A cellular automaton model is used to describe the dynamics of the catalytic oxidation of $CO$ on a $Pt(100)$ surface. The cellular automaton rules account for the structural phase transformations of the $Pt$ substrate, the reaction kinetics of the adsorbed phase and diffusion of adsorbed species. The model is used to explore the spatial structure that underlies the global oscillations observed in some parameter regimes. The spatiotemporal dynamics varies significantly within the oscillatory regime and depends on the harmonic or relaxational character of the global oscillations. Diffusion of adsorbed $CO$ plays an important role in the synchronization of the patterns on the substrate and this effect is also studied.

  3. Catalytic thermal barrier coatings

    DOE Patents [OSTI]

    Kulkarni, Anand A. (Orlando, FL); Campbell, Christian X. (Orlando, FL); Subramanian, Ramesh (Oviedo, FL)

    2009-06-02

    A catalyst element (30) for high temperature applications such as a gas turbine engine. The catalyst element includes a metal substrate such as a tube (32) having a layer of ceramic thermal barrier coating material (34) disposed on the substrate for thermally insulating the metal substrate from a high temperature fuel/air mixture. The ceramic thermal barrier coating material is formed of a crystal structure populated with base elements but with selected sites of the crystal structure being populated by substitute ions selected to allow the ceramic thermal barrier coating material to catalytically react the fuel-air mixture at a higher rate than would the base compound without the ionic substitutions. Precious metal crystallites may be disposed within the crystal structure to allow the ceramic thermal barrier coating material to catalytically react the fuel-air mixture at a lower light-off temperature than would the ceramic thermal barrier coating material without the precious metal crystallites.

  4. Catalytic nanoporous membranes

    DOE Patents [OSTI]

    Pellin, Michael J. (Naperville, IL); Hryn, John N. (Naperville, IL); Elam, Jeffrey W. (Elmhurst, IL)

    2009-12-01

    A nanoporous catalytic membrane which displays several unique features including pores which can go through the entire thickness of the membrane. The membrane has a higher catalytic and product selectivity than conventional catalysts. Anodic aluminum oxide (AAO) membranes serve as the catalyst substrate. This substrate is then subjected to Atomic Layer Deposition (ALD), which allows the controlled narrowing of the pores from 40 nm to 10 nm in the substrate by deposition of a preparatory material. Subsequent deposition of a catalytic layer on the inner surfaces of the pores reduces pore sizes to less than 10 nm and allows for a higher degree of reaction selectivity. The small pore sizes allow control over which molecules enter the pores, and the flow-through feature can allow for partial oxidation of reactant species as opposed to complete oxidation. A nanoporous separation membrane, produced by ALD is also provided for use in gaseous and liquid separations. The membrane has a high flow rate of material with 100% selectivity.

  5. Catalysis of 6? Electrocyclizations & Catalytic Disproportionation of Lignin Model Compounds

    E-Print Network [OSTI]

    Bishop, Lee

    2010-01-01

    catalytic reductions, and catalytic oxidations. 13 The high-processes for the catalytic oxidation of lignin has focusedand paper industry. Catalytic oxidation is of less interest

  6. Catalytic reforming methods

    SciTech Connect (OSTI)

    Tadd, Andrew R; Schwank, Johannes

    2013-05-14

    A catalytic reforming method is disclosed herein. The method includes sequentially supplying a plurality of feedstocks of variable compositions to a reformer. The method further includes adding a respective predetermined co-reactant to each of the plurality of feedstocks to obtain a substantially constant output from the reformer for the plurality of feedstocks. The respective predetermined co-reactant is based on a C/H/O atomic composition for a respective one of the plurality of feedstocks and a predetermined C/H/O atomic composition for the substantially constant output.

  7. Fourier-transform microwave spectroscopy and determination of the three dimensional potential energy surface for ArĖCS

    SciTech Connect (OSTI)

    Niida, Chisato; Nakajima, Masakazu; Endo, Yasuki; Sumiyoshi, Yoshihiro; Ohshima, Yasuhiro; Kohguchi, Hiroshi

    2014-03-14

    Pure rotational transitions of the ArĖCS van der Waals complex have been observed by Fourier Transform Microwave (FTMW) and FTMW-millimeter wave double resonance spectroscopy. Rotational transitions of v{sub s} = 0, 1, and 2 were able to be observed for normal CS, together with those of C{sup 34}S in v{sub s} = 0, where v{sub s} stands for the quantum number of the CS stretching vibration. The observed transition frequencies were analyzed by a free rotor model Hamiltonian, where rovibrational energies were calculated as dynamical motions of the three nuclei on a three-dimensional potential energy surface, expressed by analytical functions with 57 parameters. Initial values for the potential parameters were obtained by high-level ab initio calculations. Fifteen parameters were adjusted among the 57 parameters to reproduce all the observed transition frequencies with the standard deviation of the fit to be 0.028 MHz.

  8. Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device

    DOE Patents [OSTI]

    Schmieg, Steven J; Viola, Michael B; Cheng, Shi-Wai S; Mulawa, Patricia A; Hilden, David L; Sloane, Thompson M; Lee, Jong H

    2014-05-06

    A method for monitoring a hydrocarbon-selective catalytic reactor device of an exhaust aftertreatment system of an internal combustion engine operating lean of stoichiometry includes injecting a reductant into an exhaust gas feedstream upstream of the hydrocarbon-selective catalytic reactor device at a predetermined mass flowrate of the reductant, and determining a space velocity associated with a predetermined forward portion of the hydrocarbon-selective catalytic reactor device. When the space velocity exceeds a predetermined threshold space velocity, a temperature differential across the predetermined forward portion of the hydrocarbon-selective catalytic reactor device is determined, and a threshold temperature as a function of the space velocity and the mass flowrate of the reductant is determined. If the temperature differential across the predetermined forward portion of the hydrocarbon-selective catalytic reactor device is below the threshold temperature, operation of the engine is controlled to regenerate the hydrocarbon-selective catalytic reactor device.

  9. CHEMICAL AND CATALYTIC PROPERTIES OF ELEMENTAL CARBON

    E-Print Network [OSTI]

    Chang, S.G.

    2013-01-01

    of kinetic data for the catalytic oxidation of S0 by variousand mechanism for the catalytic oxidation of so 2 on carbonthe pH is low. The catalytic oxidation of sulfurous acid on

  10. CX-004967: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Catalytic Transformation of Waste Carbon Dioxide into Valuable MaterialsCX(s) Applied: A11, B3.6Date: 12/30/2010Location(s): Rochester, New YorkOffice(s): Fossil Energy, National Energy Technology Laboratory

  11. CX-004964: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Catalytic Transformation of Waste Carbon Dioxide into Valuable MaterialsCX(s) Applied: A11, B3.6Date: 12/29/2010Location(s): Orangeburg, South CarolinaOffice(s): Fossil Energy, National Energy Technology Laboratory

  12. Catalytic Filter for Diesel Exhaust Purification | Department...

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

    Catalytic Filter for Diesel Exhaust Purification Catalytic Filter for Diesel Exhaust Purification This project is developing a precious metal-free passive diesel particulate...

  13. Bifunctional Catalysts for the Selective Catalytic Reduction...

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

    Publications Bifunctional Catalysts for the Selective Catalytic Reduction of NO by Hydrocarbons Selectlive Catalytic Reducution of NOx wilth Diesel-Based Fuels as Reductants...

  14. Exploring Functional Mellin Transforms

    E-Print Network [OSTI]

    J. LaChapelle

    2015-01-08

    We define functional Mellin transforms within a scheme for functional integration proposed in [1]. Functional Mellin transforms can be used to define functional traces, logarithms, and determinants. The associated functional integrals are useful tools for probing function spaces in general and $C^\\ast$-algebras in particular. Several interesting aspects are explored.

  15. Catalytically active nickel ^110 surfaces in growth of carbon tubular structures

    E-Print Network [OSTI]

    Wang, Zhong L.

    Catalytically active nickel ^110 surfaces in growth of carbon tubular structures M. H. Kuang and Z interest in the growth of aligned carbon nanotube films using transition metal catalysts has led in the nucleation and growth of carbon nanotubes. The size of the catalytic particles determines the size

  16. CATALYTIC LIQUEFACTION OF BIOMASS

    E-Print Network [OSTI]

    Seth, Manu

    2012-01-01

    +material obtained by water extraction) were determined forwith acetone and water, both these extractions are doneproduct obtained by extraction with water. About 67% of the

  17. Size Effect of Ruthenium Nanoparticles in Catalytic Carbon Monoxide Oxidation

    E-Print Network [OSTI]

    Joo, Sang Hoon

    2011-01-01

    sensitivity The catalytic oxidation of carbon monoxide (CO)stabilizer. The catalytic activity of CO oxidation overintriguing catalytic behavior for CO oxidation 5-15 ; while

  18. TRANSFORME Dpartement

    E-Print Network [OSTI]

    Mignotte, Max

    (b) Transform√©e de Hough (Espace (s, #)) (c) Principales lignes reconstruites 5 #12; TRANSFORM√?E DE

  19. Market Transformation

    SciTech Connect (OSTI)

    Not Available

    2008-09-01

    Summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its market transformation subprogram.

  20. Transformative Experiences

    E-Print Network [OSTI]

    Gering, Jon C.

    Transformative Experiences Internships & Field Schools Honors & Research Faculty Notables Alumni have at least one poten- tially transformative experi- ence - an opportunity to de- sign and carry out to be transformational are study abroad, internships, service learning, research, student-led learning, and lead- ership

  1. Method for measuring recovery of catalytic elements from fuel cells

    DOE Patents [OSTI]

    Shore, Lawrence (Edison, NJ); Matlin, Ramail (Berkeley, NJ)

    2011-03-08

    A method is provided for measuring the concentration of a catalytic clement in a fuel cell powder. The method includes depositing on a porous substrate at least one layer of a powder mixture comprising the fuel cell powder and an internal standard material, ablating a sample of the powder mixture using a laser, and vaporizing the sample using an inductively coupled plasma. A normalized concentration of catalytic element in the sample is determined by quantifying the intensity of a first signal correlated to the amount of catalytic element in the sample, quantifying the intensity of a second signal correlated to the amount of internal standard material in the sample, and using a ratio of the first signal intensity to the second signal intensity to cancel out the effects of sample size.

  2. Functional Mellin Transforms

    E-Print Network [OSTI]

    J. LaChapelle

    2015-01-07

    Functional integrals are defined in terms of locally compact topological groups and their associated Banach-valued Haar integrals. This approach generalizes the functional integral scheme of Cartier and DeWitt-Morette. The definition allows a construction of functional Mellin transforms. In turn, the functional Mellin transforms can be used to define functional traces, logarithms, and determinants. The associated functional integrals are useful tools for probing function spaces in general and $C^\\ast$-algebras in particular. Several interesting aspects are explored.

  3. Market Transformation

    SciTech Connect (OSTI)

    2011-02-15

    This Fuel Cell Technologies Program fact sheet outlines current status and challenges in the market transformation of hydrogen and fuel cell technologies.

  4. Market Transformation

    Fuel Cell Technologies Publication and Product Library (EERE)

    This Fuel Cell Technologies Program fact sheet outlines current status and challenges in the market transformation of hydrogen and fuel cell technologies.

  5. Transformative copy

    E-Print Network [OSTI]

    Offenhuber, Dietmar

    2008-01-01

    The ability to create an unlimited number of identical copies is a privilege of digital documents. What if that would not be the case, if each copy of a digital file would go along with some sort of transformation? This ...

  6. Heat transfer rates in fixed bed catalytic reactors†

    E-Print Network [OSTI]

    Levelton, Bruce Harding

    1951-01-01

    bed. A consideration of thermal effects in a gas-solid tubular reactor involves a number of prime variables, viz. (a) Reynolds number and heat capacity of reactants (b) Tube diameter and length (c) Catalyst particle size, shape and characteristics... conditions than in fixed bed reactors prevail. The problem of determining temperatures in moving-bed catalytic reactors is somewhat similar to that in gas-solid fixed bed reactors, but this investigation will not treat such cases. The mechanism of heat...

  7. Catalytic oxidizers and Title V requirements

    SciTech Connect (OSTI)

    Uberoi, M.; Rach, S.E.

    1999-07-01

    Catalytic oxidizers have been used to reduce VOC emissions from various industries including printing, chemical, paint, coatings, etc. A catalytic oxidizer uses a catalyst to reduce the operating temperature for combustion to approximately 600 F, which is substantially lower than thermal oxidation unit. Title V requirements have renewed the debate on the best methods to assure compliance of catalytic oxidizers, with some suggesting the need for continuous emission monitoring equipment. This paper will discuss the various aspects of catalytic oxidation and consider options such as monitoring inlet/outlet temperatures, delta T across the catalyst, periodic laboratory testing of catalyst samples, and preventive maintenance procedures as means of assuring continuous compliance.

  8. Plasma-assisted catalytic reduction system

    DOE Patents [OSTI]

    Vogtlin, G.E.; Merritt, B.T.; Hsiao, M.C.; Wallman, P.H.; Penetrante, B.M.

    1998-01-27

    Non-thermal plasma gas treatment is combined with selective catalytic reduction to enhance NO{sub x} reduction in oxygen-rich vehicle engine exhausts. 8 figs.

  9. Infrared Mapping Helps Optimize Catalytic Reactions

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

    Infrared Mapping Helps Optimize Catalytic Reactions Print A pathway to more effective and efficient synthesis of pharmaceuticals and other flow-reactor chemical products has been...

  10. Molecular catalytic coal liquid conversion. Quarterly report...

    Office of Scientific and Technical Information (OSTI)

    report Citation Details In-Document Search Title: Molecular catalytic coal liquid conversion. Quarterly report You are accessing a document from the Department of Energy's (DOE)...

  11. Molecular catalytic coal liquid conversion. Quarterly status...

    Office of Scientific and Technical Information (OSTI)

    report Citation Details In-Document Search Title: Molecular catalytic coal liquid conversion. Quarterly status report In this Quarter, the research was focused continually on the...

  12. Molecular catalytic coal liquid conversion. Quarterly status...

    Office of Scientific and Technical Information (OSTI)

    July--September 1995 Citation Details In-Document Search Title: Molecular catalytic coal liquid conversion. Quarterly status report, July--September 1995 The research was...

  13. Molecular catalytic coal liquid conversion. Quarterly report...

    Office of Scientific and Technical Information (OSTI)

    October--December 1994 Citation Details In-Document Search Title: Molecular catalytic coal liquid conversion. Quarterly report, October--December 1994 You are accessing a...

  14. Molecular catalytic coal liquid conversion. Quarterly status...

    Office of Scientific and Technical Information (OSTI)

    July--September 1995 Citation Details In-Document Search Title: Molecular catalytic coal liquid conversion. Quarterly status report, July--September 1995 You are accessing...

  15. Molecular catalytic coal liquid conversion. Quarterly report...

    Office of Scientific and Technical Information (OSTI)

    October--December 1994 Citation Details In-Document Search Title: Molecular catalytic coal liquid conversion. Quarterly report, October--December 1994 In this Quarter, the...

  16. Molecular catalytic coal liquid conversion. Quarterly report...

    Office of Scientific and Technical Information (OSTI)

    report Citation Details In-Document Search Title: Molecular catalytic coal liquid conversion. Quarterly report In this Quarter, the research was focused continually on the two...

  17. Molecular catalytic coal liquid conversion. Quarterly status...

    Office of Scientific and Technical Information (OSTI)

    report Citation Details In-Document Search Title: Molecular catalytic coal liquid conversion. Quarterly status report You are accessing a document from the Department of...

  18. Molecular catalytic hydrogenation of aromatic hydrocarbons and

    Office of Scientific and Technical Information (OSTI)

    catalytic hydrogenation of aromatic hydrocarbons and hydrotreating of coal liquids. Yang, Shiyong; Stock, L.M. 01 COAL, LIGNITE, AND PEAT; 40 CHEMISTRY; COAL LIQUIDS;...

  19. Molecular catalytic hydrogenation of aromatic hydrocarbons and...

    Office of Scientific and Technical Information (OSTI)

    hydrogenation of aromatic hydrocarbons and hydrotreating of coal liquids. Citation Details In-Document Search Title: Molecular catalytic hydrogenation of aromatic hydrocarbons and...

  20. Infrared Mapping Helps Optimize Catalytic Reactions

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

    The team is now exploring techniques that would permit two- and three-dimensional mapping of catalytic reactions. Multidimensional imaging will give the ability to know...

  1. Microchannel Reactor System for Catalytic Hydrogenation

    SciTech Connect (OSTI)

    2004-07-01

    Energy-Efficient Catalytic Hydrogenation Reactions. Hydrogenation reactions are very versatile and account for 10% to 20% of all reactions in the pharmaceutical industry.

  2. Bifunctional Catalysts for the Selective Catalytic Reduction...

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

    as Reductants Bifunctional Catalysts for the Selective Catalytic Reduction of NO by Hydrocarbons Development of Optimal Catalyst Designs and Operating Strategies for Lean NOx...

  3. Catalytic membranes for fuel cells

    DOE Patents [OSTI]

    Liu, Di-Jia (Naperville, IL); Yang, Junbing (Bolingbrook, IL); Wang, Xiaoping (Naperville, IL)

    2011-04-19

    A fuel cell of the present invention comprises a cathode and an anode, one or both of the anode and the cathode including a catalyst comprising a bundle of longitudinally aligned graphitic carbon nanotubes including a catalytically active transition metal incorporated longitudinally and atomically distributed throughout the graphitic carbon walls of said nanotubes. The nanotubes also include nitrogen atoms and/or ions chemically bonded to the graphitic carbon and to the transition metal. Preferably, the transition metal comprises at least one metal selected from the group consisting of Fe, Co, Ni, Mn, and Cr.

  4. Utilization of char from biomass gasification in catalytic applications

    E-Print Network [OSTI]

    Columbia University

    Utilization of char from biomass gasification in catalytic applications Naomi Klinghoffer Submitted Utilization of char from biomass gasification in catalytic applications Naomi Klinghoffer Utilization takes place during catalytic decomposition. This thesis focuses on the utilization of char as a catalyst

  5. Fourier Transform Pairs The Fourier transform transforms a function of

    E-Print Network [OSTI]

    Masci, Frank

    Fourier Transform Pairs The Fourier transform transforms a function of time, f(t), into a function of frequency, F(s): F {f(t)}(s) = F(s) = Z - f(t)e- j2st dt. The inverse Fourier transform transforms a func. The inverse Fourier transform of the Fourier trans- form is the identity transform: f(t) = Z - Z - f()e- j2s

  6. Method of fabricating a catalytic structure

    DOE Patents [OSTI]

    Rollins, Harry W. (Idaho Falls, ID); Petkovic, Lucia M. (Idaho Falls, ID); Ginosar, Daniel M. (Idaho Falls, ID)

    2009-09-22

    A precursor to a catalytic structure comprising zinc oxide and copper oxide. The zinc oxide has a sheet-like morphology or a spherical morphology and the copper oxide comprises particles of copper oxide. The copper oxide is reduced to copper, producing the catalytic structure. The catalytic structure is fabricated by a hydrothermal process. A reaction mixture comprising a zinc salt, a copper salt, a hydroxyl ion source, and a structure-directing agent is formed. The reaction mixture is heated under confined volume conditions to produce the precursor. The copper oxide in the precursor is reduced to copper. A method of hydrogenating a carbon oxide using the catalytic structure is also disclosed, as is a system that includes the catalytic structure.

  7. Comparison of Water-Hydrogen Catalytic Exchange Processes Versus...

    Office of Environmental Management (EM)

    Comparison of Water-Hydrogen Catalytic Exchange Processes Versus Water Distillation for Water Detritiation Comparison of Water-Hydrogen Catalytic Exchange Processes Versus Water...

  8. Measurement of diesel solid nanoparticle emissions using a catalytic...

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

    diesel solid nanoparticle emissions using a catalytic stripper for comparison with Europe's PMP protocol Measurement of diesel solid nanoparticle emissions using a catalytic...

  9. Passive Catalytic Approach to Low Temperature NOx Emission Abatement...

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

    Catalytic Approach to Low Temperature NOx Emission Abatement Passive Catalytic Approach to Low Temperature NOx Emission Abatement Numerically evaluated and optimized proposed...

  10. Molecular catalytic coal liquid conversion (Conference) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    Conference: Molecular catalytic coal liquid conversion Citation Details In-Document Search Title: Molecular catalytic coal liquid conversion This research, which is relevant to the...

  11. Molecular catalytic coal liquid conversion (Conference) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    Conference: Molecular catalytic coal liquid conversion Citation Details In-Document Search Title: Molecular catalytic coal liquid conversion You are accessing a document from...

  12. Role of surface generated radicals in catalytic combustion

    SciTech Connect (OSTI)

    Santavicca, D.A.; Stein, Y.; Royce, B.S.H.

    1984-04-01

    The role of surface generated OH radicals in determining the catalytic ignition characteristics for propane oxidation on platinum were studied. The experiments were conducted in a stacked-plate, catalyst bed. Transient measurements, during catalytic ignition, of the catalyst's axial temperature profile were made and the effect of equivalence ratio, inlet temperature and inlet velocity was investigated. These measurements will provide insights which will be useful in planning and interpreting to OH measurements. Attempts to measure OH concentration in the catalyst bed using resonance absorption spectroscopy were unsuccessful, indicating that OH concentrations are below 10 to the 16th power/cc but still possibly above equilibrium values. Measurements are currently underway using forward scatter laser induced fluorescence which should extend the OH detection limits several orders of magnitude below the equilibrium concentrations.

  13. CX-004966: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Catalytic Transformation of Waste Carbon Dioxide into Valuable MaterialsCX(s) Applied: A9, A11, B3.6Date: 12/30/2010Location(s): Ithaca, New YorkOffice(s): Fossil Energy, National Energy Technology Laboratory

  14. CX-004968: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Catalytic Transformation of Waste Carbon Dioxide into Valuable MaterialsCX(s) Applied: A9, A11, B3.6Date: 12/29/2010Location(s): Baton Rogue, LouisianaOffice(s): Fossil Energy, National Energy Technology Laboratory

  15. Catalytic Hydrothermal Gasification of Biomass

    SciTech Connect (OSTI)

    Elliott, Douglas C.

    2008-05-06

    A recent development in biomass gasification is the use of a pressurized water processing environment in order that drying of the biomass can be avoided. This paper reviews the research undertaken developing this new option for biomass gasification. This review does not cover wet oxidation or near-atmospheric-pressure steam-gasification of biomass. Laboratory research on hydrothermal gasification of biomass focusing on the use of catalysts is reviewed here, and a companion review focuses on non-catalytic processing. Research includes liquid-phase, sub-critical processing as well as super-critical water processing. The use of heterogeneous catalysts in such a system allows effective operation at lower temperatures, and the issues around the use of catalysts are presented. This review attempts to show the potential of this new processing concept by comparing the various options under development and the results of the research.

  16. Catalytic reactor with improved burner

    DOE Patents [OSTI]

    Faitani, Joseph J. (Hartford, CT); Austin, George W. (Glastonbury, CT); Chase, Terry J. (Somers, CT); Suljak, George T. (Vernon, CT); Misage, Robert J. (Manchester,all of, CT)

    1981-01-01

    To more uniformly distribute heat to the plurality of catalyst tubes in a catalytic reaction furnace, the burner disposed in the furnace above the tops of the tubes includes concentric primary and secondary annular fuel and air outlets. The fuel-air mixture from the primary outlet is directed towards the tubes adjacent the furnace wall, and the burning secondary fuel-air mixture is directed horizontally from the secondary outlet and a portion thereof is deflected downwardly by a slotted baffle toward the tubes in the center of the furnace while the remaining portion passes through the slotted baffle to another baffle disposed radially outwardly therefrom which deflects it downwardly in the vicinity of the tubes between those in the center and those near the wall of the furnace.

  17. Non-catalytic recuperative reformer

    DOE Patents [OSTI]

    Khinkis, Mark J.; Kozlov, Aleksandr P.; Kurek, Harry

    2015-12-22

    A non-catalytic recuperative reformer has a flue gas flow path for conducting hot flue gas from a thermal process and a reforming mixture flow path for conducting a reforming mixture. At least a portion of the reforming mixture flow path is embedded in the flue gas flow path to permit heat transfer from the hot flue gas to the reforming mixture. The reforming mixture flow path contains substantially no material commonly used as a catalyst for reforming hydrocarbon fuel (e.g., nickel oxide, platinum group elements or rhenium), but instead the reforming mixture is reformed into a higher calorific fuel via reactions due to the heat transfer and residence time. In a preferred embodiment, extended surfaces of metal material such as stainless steel or metal alloy that are high in nickel content are included within at least a portion of the reforming mixture flow path.

  18. Catalytic cartridge SO3 decomposer

    SciTech Connect (OSTI)

    Galloway, T.R.

    1982-05-25

    A catalytic cartridge surrounding a heat pipe driven by a heat source is utilized as a SO3 decomposer for thermochemical hydrogen production. The cartridge has two embodiments, a crossflow cartridge and an axial flow cartridge. In the cross-flow cartridge, SO3 gas is flowed through a chamber and incident normally to a catalyst coated tube extending through the chamber, the catalyst coated tube surrounding the heat pipe. In the axialflow cartridge, so3 gas is flowed through the annular space between concentric inner and outer cylindrical walls, the inner cylindrical wall being coated by a catalyst and surrounding the heat pipe. The modular cartridge decomposer provides high thermal efficiency, high conversion efficiency, and increased safety.

  19. Reservoir characterization using wavelet transforms

    E-Print Network [OSTI]

    Rivera Vega, Nestor

    2004-09-30

    Automated detection of geological boundaries and determination of cyclic events controlling deposition can facilitate stratigraphic analysis and reservoir characterization. This study applies the wavelet transformation, a recent advance in signal...

  20. Amphiphilic Phase-transforming Catalysts for Transesterification of Triglycerides†

    E-Print Network [OSTI]

    Nawaratna, Gayan I

    2013-04-30

    at 150 and 200 oC, at various degree of polymerization ................................................................................................ 23 Figure 9: Hydrolysis and water condensation reactions of titanium isopropoxide .......... 30... titanium isopropoxide-based phase-transforming catalyst on transesterification. This includes catalytic behavior of titanium isopropoxide at varying temperature and reaction times. Chapter III reports a study of effects of tail groups of 3 titanium...

  1. Hough Transform Common Names: Hough transform

    E-Print Network [OSTI]

    Masci, Frank

    Hough Transform Common Names: Hough transform Brief Description The Hough transform is a technique that the desired features be specified in some parametric form, the classical Hough transform is most commonly used for the detection of regular curves such as lines, circles, ellipses, etc. A generalized Hough transform can

  2. Vacuum-insulated catalytic converter

    DOE Patents [OSTI]

    Benson, David K. (Golden, CO)

    2001-01-01

    A catalytic converter has an inner canister that contains catalyst-coated substrates and an outer canister that encloses an annular, variable vacuum insulation chamber surrounding the inner canister. An annular tank containing phase-change material for heat storage and release is positioned in the variable vacuum insulation chamber a distance spaced part from the inner canister. A reversible hydrogen getter in the variable vacuum insulation chamber, preferably on a surface of the heat storage tank, releases hydrogen into the variable vacuum insulation chamber to conduct heat when the phase-change material is hot and absorbs the hydrogen to limit heat transfer to radiation when the phase-change material is cool. A porous zeolite trap in the inner canister absorbs and retains hydrocarbons from the exhaust gases when the catalyst-coated substrates and zeolite trap are cold and releases the hydrocarbons for reaction on the catalyst-coated substrate when the zeolite trap and catalyst-coated substrate get hot.

  3. Selective oxidation of hydrocarbons in a catalytic dense membrane reactor: Catalytic properties of BIMEVOX (Me = Ta)

    E-Print Network [OSTI]

    Boyer, Edmond

    1 Selective oxidation of hydrocarbons in a catalytic dense membrane reactor: Catalytic properties for syngas or H2 production from light hydrocarbons. #12;2 Keywords: Dense membrane reactor, BIMEVOX, BITAVOX to decouple the two steps of the redox mechanism that prevails in selective oxidation of hydrocarbons [1

  4. Testability Transformation --Program Transformation to Improve Testability

    E-Print Network [OSTI]

    Binkley, David W.

    Testability Transformation -- Program Transformation to Improve Testability Mark Harman1 , Andr, 26 Richmond Street, Glasgow G1 1XH, UK. Corresponding Author. Abstract. Testability transformation. The goal is to improve the testing process by transforming a program to one that is more amenable

  5. Testability Transformation: Program Transformation to Improve Testability

    E-Print Network [OSTI]

    Harman, Mark

    Testability Transformation: Program Transformation to Improve Testability An Overview of Recent Author. Abstract. Testability transformation is a new form of program transfor- mation in which the goal to some chosen test adequacy criterion. The goal is to improve the testing process by transforming

  6. The Role of Organic Capping Layers of Platinum Nanoparticles in Catalytic Activity of CO Oxidation

    E-Print Network [OSTI]

    Park, Jeong Y.; Aliaga, Cesar; Renzas, J. Russell; Lee, Hyunjoo; Somorjai, Gabor A.

    2009-01-01

    Nanoparticles in Catalytic Activity of CO Oxidation Jeong Y.that the catalytic activity under CO oxidation with partiallayers on catalytic activity during CO oxidation is not

  7. The Role of Organic Capping Layers of Platinum Nanoparticles in Catalytic Activity of CO Oxidation

    E-Print Network [OSTI]

    Park, Jeong Y.

    2010-01-01

    Nanoparticles in Catalytic Activity of CO Oxidation Jeong Y.that the catalytic activity under CO oxidation with partiallayers on catalytic activity during CO oxidation is not

  8. Hydrogen Oxidation-Driven Hot Electron Flow Detected by Catalytic Nanodiodes

    E-Print Network [OSTI]

    Hervier, Antoine

    2011-01-01

    In conclusion, the catalytic oxidation of hydrogen on a Pt/chemicurrent from catalytic CO oxidation at atmosphericchemicurrent in catalytic hydrogen oxidation on Pt. Hydrogen

  9. CATALYTIC OXIDATION OF S(IV) ON ACTIVATED CARBON IN AQUEOUS SUSPENSION: KINETICS AND MECHANISM

    E-Print Network [OSTI]

    Brodzinsky, Richard

    2012-01-01

    and Mechanism for the Catalytic Oxidation of Sulfur Dioxidekinetic study of the catalytic oxidation on carbon particlesthe kinetics of the catalytic oxidation of sulfur dioxide on

  10. Catalytic Combustor for Fuel-Flexible Turbine

    SciTech Connect (OSTI)

    Laster, W. R.; Anoshkina, E.

    2008-01-31

    Under the sponsorship of the U. S. Department of Energyís National Energy Technology Laboratory, Siemens Westinghouse has conducted a three-year program to develop an ultra low NOx, fuel flexible catalytic combustor for gas turbine application in IGCC. The program is defined in three phases: Phase 1- Implementation Plan, Phase 2- Validation Testing and Phase 3 Ė Field Testing. Both Phase 1 and Phase 2 of the program have been completed. In IGCC power plants, the gas turbine must be capable of operating on syngas as a primary fuel and an available back-up fuel such as natural gas. In this program the Rich Catalytic Lean (RCLTM) technology is being developed as an ultra low NOx combustor. In this concept, ultra low NOx is achieved by stabilizing a lean premix combustion process by using a catalytic reactor to oxidize a portion of the fuel, increasing the temperature of fuel/air mixture prior to the main combustion zone. In Phase 1, the feasibility of the catalytic concept for syngas application has been evaluated and the key technology issues identified. In Phase II the technology necessary for the application of the catalytic concept to IGCC fuels was developed through detailed design and subscale testing. Phase III (currently not funded) will consist of full-scale combustor basket testing on natural gas and syngas.

  11. Catalytic Combustor for Fuel-Flexible Turbine

    SciTech Connect (OSTI)

    W. R. Laster; E. Anoshkina

    2008-01-31

    Under the sponsorship of the U. S. Department of Energy's National Energy Technology Laboratory, Siemens Westinghouse has conducted a three-year program to develop an ultra low NOx, fuel flexible catalytic combustor for gas turbine application in IGCC. The program is defined in three phases: Phase 1 - Implementation Plan, Phase 2 - Validation Testing and Phase 3 - Field Testing. Both Phase 1 and Phase 2 of the program have been completed. In IGCC power plants, the gas turbine must be capable of operating on syngas as a primary fuel and an available back-up fuel such as natural gas. In this program the Rich Catalytic Lean (RCLTM) technology is being developed as an ultra low NOx combustor. In this concept, ultra low NOx is achieved by stabilizing a lean premix combustion process by using a catalytic reactor to oxidize a portion of the fuel, increasing the temperature of fuel/air mixture prior to the main combustion zone. In Phase 1, the feasibility of the catalytic concept for syngas application has been evaluated and the key technology issues identified. In Phase II the technology necessary for the application of the catalytic concept to IGCC fuels was developed through detailed design and subscale testing. Phase III (currently not funded) will consist of full-scale combustor basket testing on natural gas and syngas.

  12. Catalytic Combustor for Fuel-Flexible Turbine

    SciTech Connect (OSTI)

    W. R. Laster; E. Anoshkina; P. Szedlacsek

    2006-03-31

    Under the sponsorship of the U.S. Department of Energy's National Energy Technology Laboratory, Siemens Westinghouse is conducting a three-year program to develop an ultra low NOx, fuel flexible catalytic combustor for gas turbine application in IGCC. The program is defined in three phases: Phase 1-Implementation Plan, Phase 2-Validation Testing and Phase 3-Field Testing. The Phase 1 program has been completed. Phase II was initiated in October 2004. In IGCC power plants, the gas turbine must be capable of operating on syngas as a primary fuel and an available back-up fuel such as natural gas. In this program the Rich Catalytic Lean (RCL{trademark}) technology is being developed as an ultra low NOx combustor. In this concept, ultra low NOx is achieved by stabilizing a lean premix combustion process by using a catalytic reactor to react part of the fuel, increasing the fuel/air mixture temperature. In Phase 1, the feasibility of the catalytic concept for syngas application has been evaluated and the key technology issues identified. In Phase II the catalytic concept will be demonstrated through subscale testing. Phase III will consist of full-scale combustor basket testing on natural gas and syngas.

  13. Electro Catalytic Oxidation (ECO) Operation

    SciTech Connect (OSTI)

    Morgan Jones

    2011-03-31

    The power industry in the United States is faced with meeting many new regulations to reduce a number of air pollutants including sulfur dioxide, nitrogen oxides, fine particulate matter, and mercury. With over 1,000 power plants in the US, this is a daunting task. In some cases, traditional pollution control technologies such as wet scrubbers and SCRs are not feasible. Powerspan's Electro-Catalytic Oxidation, or ECO{reg_sign} process combines four pollution control devices into a single integrated system that can be installed after a power plant's particulate control device. Besides achieving major reductions in emissions of sulfur dioxide (SO{sub 2}), nitrogen oxides (NOx), fine particulate matter (PM2.5) and mercury (Hg), ECO produces a highly marketable fertilizer, which can help offset the operating costs of the process system. Powerspan has been operating a 50-MW ECO commercial demonstration unit (CDU) at FirstEnergy Corp.'s R.E. Burger Plant near Shadyside, Ohio, since February 2004. In addition to the CDU, a test loop has been constructed beside the CDU to demonstrate higher NOx removal rates and test various scrubber packing types and wet ESP configurations. Furthermore, Powerspan has developed the ECO{reg_sign}{sub 2} technology, a regenerative process that uses a proprietary solvent to capture CO{sub 2} from flue gas. The CO{sub 2} capture takes place after the capture of NOx, SO{sub 2}, mercury, and fine particulate matter. Once the CO{sub 2} is captured, the proprietary solution is regenerated to release CO{sub 2} in a form that is ready for geological storage or beneficial use. Pilot scale testing of ECO{sub 2} began in early 2009 at FirstEnergy's Burger Plant. The ECO{sub 2} pilot unit is designed to process a 1-MW flue gas stream and produce 20 tons of CO{sub 2} per day, achieving a 90% CO{sub 2} capture rate. The ECO{sub 2} pilot program provided the opportunity to confirm process design and cost estimates, and prepare for large scale capture and sequestration projects. The objectives of this project were to prove at a commercial scale that ECO is capable of extended operations over a range of conditions, that it meets the reliability requirements of a typical utility, and that the fertilizer co-product can be consistently generated, providing ECO with an economic advantage over conventional technologies currently available. Further objectives of the project were to show that the ECO system provides flue gas that meets the inlet standards necessary for ECO{sub 2} to operate, and that the outlet CO{sub 2} and other constituents produced by the ECO{sub 2} pilot can meet Kinder-Morgan pipeline standards for purposes of sequestration. All project objectives are consistent with DOE's Pollution Control Innovations for Power Plants program goals.

  14. Process for catalytically oxidizing cycloolefins, particularly cyclohexene

    DOE Patents [OSTI]

    Mizuno, Noritaka (Sapporo, JP); Lyon, David K. (Bend, OR); Finke, Richard G. (Eugene, OR)

    1993-01-01

    This invention is a process for catalytically oxidizing cycloolefins, particularly cyclohexenes, to form a variety of oxygenates. The catalyst used in the process is a covalently bonded iridium-heteropolyanion species. The process uses the catalyst in conjunction with a gaseous oxygen containing gas to form 2-cyclohexen-1-ol and also 2-cyclohexen-1-one.

  15. Transparent and Catalytic Carbon Nanotube Films

    E-Print Network [OSTI]

    Hone, James

    for the dye-sensitized solar cell. Other possible applications include batteries, fuel cells and intercalation in hydrogen fuel cells and lithium ion batteries.1,10,12,14 However, the electrochemical activity to optimize performance through processing. In this study, we quantify the catalytic activity of single

  16. Performance characterization of a hydrogen catalytic heater.

    SciTech Connect (OSTI)

    Johnson, Terry Alan; Kanouff, Michael P.

    2010-04-01

    This report describes the performance of a high efficiency, compact heater that uses the catalytic oxidation of hydrogen to provide heat to the GM Hydrogen Storage Demonstration System. The heater was designed to transfer up to 30 kW of heat from the catalytic reaction to a circulating heat transfer fluid. The fluid then transfers the heat to one or more of the four hydrogen storage modules that make up the Demonstration System to drive off the chemically bound hydrogen. The heater consists of three main parts: (1) the reactor, (2) the gas heat recuperator, and (3) oil and gas flow distribution manifolds. The reactor and recuperator are integrated, compact, finned-plate heat exchangers to maximize heat transfer efficiency and minimize mass and volume. Detailed, three-dimensional, multi-physics computational models were used to design and optimize the system. At full power the heater was able to catalytically combust a 10% hydrogen/air mixture flowing at over 80 cubic feet per minute and transfer 30 kW of heat to a 30 gallon per minute flow of oil over a temperature range from 100 C to 220 C. The total efficiency of the catalytic heater, defined as the heat transferred to the oil divided by the inlet hydrogen chemical energy, was characterized and methods for improvement were investigated.

  17. Anodic aluminium oxide catalytic membranes for asymmetric epoxidation{

    E-Print Network [OSTI]

    Anodic aluminium oxide catalytic membranes for asymmetric epoxidation{ So-Hye Cho, Nolan D. Walther, the catalytic membrane reactor configuration confers a significant advantage to oxidation reactions--the use of a catalytic membrane can provide a reactive interface for the oxidation to take place while avoiding long

  18. Capturing fleeting intermediates in a catalytic CH amination reaction cycle

    E-Print Network [OSTI]

    Zare, Richard N.

    for the mechanistic study of catalytic processes. mass spectrometry | transient intermediates | C≠H oxidation | catalysis Catalytic methods for selective C≠H oxidation rely on the exquisite choreography of a series oxidant (4, 5, 11). The fast rates of the on- and off-path steps in this catalytic process

  19. Catalytic Oxidation Hot Paper DOI: 10.1002/anie.201400134

    E-Print Network [OSTI]

    Zare, Richard N.

    Catalytic Oxidation Hot Paper DOI: 10.1002/anie.201400134 Trinuclear Pd3O2 Intermediate in Aerobic* Abstract: The activation of O2 is a key step in selective catalytic aerobic oxidation reactions mediated aerobic oxidation of alcohols. The formation and catalytic activity of the trinuclear Pd3O2 species

  20. Data reconciliation and optimal operation of a catalytic naphtha reformer

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Data reconciliation and optimal operation of a catalytic naphtha reformer Tore Lid Statoil Mongstad model of a semiregenerative catalytic naphtha reformer, involving five pseudo components, was presented) developed a more de- tailed model of a semiregenerative catalytic naphtha reformer, involving 35 pseudo

  1. Sandia Energy - Solar Market Transformation

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

    Solar Market Transformation Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Solar Market Transformation Solar Market TransformationTara...

  2. Polarographic catalytic currents and their use in the analysis of waters

    SciTech Connect (OSTI)

    Kheifets, L.Ya.; Cherevik, A.V.; Vasyukov, A.E.; Kabanenko, L.F.

    1987-08-20

    It was shown that the magnitude of the catalytic effects and the lower limits of the determinable contents c/sub 1/ in the various types of polarography differ by 2-100 times for the following systems: Cu(II), Ni(II), Co(II)-dimethylglyoxime; V(V)-cupferron-quinine; Cr(III), (VI)-nitrate; Ti(IV)-organic acid-chlorate. The c/sub 1/ values obtained in practice do not correspond for all the systems to the values calculated from the magnitude of the catalytic effect, since the catalytic currents begin to show up on the attainment of a minimum (threshold) concentration of the metal for the given system. The threshold concentrations of the metals were established for some of the systems. The discovered characteristics of the catalytic currents were used in the selection of polarographic methods for the determination of Cu(II), Ni(II), Co(II), V(V), Cr(III), (VI), and Ti(IV) in natural waters at the level of the maximum permissible concentration.

  3. Behavior of chars from Bursa Mustafa Kemal Pasa Alpagut and Balkesir Dursunbey Cakiirca Lignite (Turkey) during non-catalytic and catalytic gasification

    SciTech Connect (OSTI)

    Bozkurt, Y.; Misirlioglu, Z.; Sinag, A.; Tekes, A.T.; Canel, M. [Ankara University, Ankara (Turkey). Dept. of Chemistry

    2008-07-01

    The reactivities of chars obtained by pyrolysis of Bursa Mustafa Kemal Pasa Alpagut lignite and Balkesir Dursunbey Cakiirca lignite (Turkey) at different temperatures were determined by CO{sub 2} gasification and by combustion with O{sub 2}. Catalytic effect of Na{sub 2}CO{sub 3} on the CO{sub 2} and O{sub 2} gasification reactivity of chars was investigated. Gasification tests were performed in the fixed bed reactors operating at ambient pressure. Reactivity of chars during the CO{sub 2} gasification reactions was determined by calculating the reaction rate constants and reactivity of chars during the O{sub 2} gasification was determined by using ignition temperatures of the samples. Activation energies and Arrhenius constants of the chars on the CO{sub 2} gasification reactions were also calculated by the help of Arrhenius curves. The activation energy for CO{sub 2} gasification was generally decreased with pyrolysis temperature, due to the different surface characteristics and different nature of carbon atoms gasified as the gasification reactions proceed. Generally, the increase in pyrolysis temperature leads to an increase in gasification reactivity with CO{sub 2}. The reactivity of chars in catalytic gasification was higher than the corresponding non-catalytic reactivity of the same chars. Ignition temperature increased with increasing pyrolysis temperature.

  4. Method and apparatus for a catalytic firebox reactor

    DOE Patents [OSTI]

    Smith, Lance L. (North Haven, CT); Etemad, Shahrokh (Trumbull, CT); Ulkarim, Hasan (Hamden, CT); Castaldi, Marco J. (Bridgeport, CT); Pfefferle, William C. (Madison, CT)

    2001-01-01

    A catalytic firebox reactor employing an exothermic catalytic reaction channel and multiple cooling conduits for creating a partially reacted fuel/oxidant mixture. An oxidation catalyst is deposited on the walls forming the boundary between the multiple cooling conduits and the exothermic catalytic reaction channel, on the side of the walls facing the exothermic catalytic reaction channel. This configuration allows the oxidation catalyst to be backside cooled by any fluid passing through the cooling conduits. The heat of reaction is added to both the fluid in the exothermic catalytic reaction channel and the fluid passing through the cooling conduits. After discharge of the fluids from the exothermic catalytic reaction channel, the fluids mix to create a single combined flow. A further innovation in the reactor incorporates geometric changes in the exothermic catalytic reaction channel to provide streamwise variation of the velocity of the fluids in the reactor.

  5. FOURIER TRANSFORMS AND FROBENIUS EIGENVALUES FOR FINITE COXETER GROUPS

    E-Print Network [OSTI]

    Malle, Gunter

    FOURIER TRANSFORMS AND FROBENIUS EIGENVALUES FOR FINITE COXETER GROUPS group involves a certain non-abelian Fourier transformation. We construct analogous- ory of character sheaves. We also determine Fourier matrices for the "spetses" (in the sense

  6. Catalytic fast pyrolysis of lignocellulosic biomass

    SciTech Connect (OSTI)

    Liu, Changjun; Wang, Huamin; Karim, Ayman M.; Sun, Junming; Wang, Yong

    2014-11-21

    Increasing energy demand, especially in the transportation sector, and soaring CO2 emissions necessitate the exploitation of renewable sources of energy. Despite the large variety of new energy Q3 carriers, liquid hydrocarbon still appears to be the most attractive and feasible form of transportation fuel taking into account the energy density, stability and existing infrastructure. Biomass is an abundant, renewable source of energy; however, utilizing it in a cost-effective way is still a substantial challenge. Lignocellulose is composed of three major biopolymers, namely cellulose, hemicellulose and lignin. Fast pyrolysis of biomass is recognized as an efficient and feasible process to selectively convert lignocellulose into a liquid fuelóbio-oil. However bio-oil from fast pyrolysis contains a large amount of oxygen, distributed in hundreds of oxygenates. These oxygenates are the cause of many negative properties, such as low heating values, high corrosiveness, high viscosity, and instability; they also greatly Q4 limit the application of bio-oil particularly as transportation fuel. Hydrocarbons derived from biomass are most attractive because of their high energy density and compatibility with the existing infrastructure. Thus, converting lignocellulose into transportation fuels via catalytic fast pyrolysis has attracted much attention. Many studies related to catalytic fast pyrolysis of biomass have been published. The main challenge of this process is the development of active and stable catalysts that can deal with a large variety of decomposition intermediates from lignocellulose. This review starts with the current understanding of the chemistry in fast pyrolysis of lignocellulose and focuses on the development of catalysts in catalytic fast pyrolysis. Recent progress in the experimental studies on catalytic fast pyrolysis of biomass is also summarized with the emphasis on bio-oil yields and quality.

  7. Preface: Challenges for Catalytic Exhaust Aftertreatment

    SciTech Connect (OSTI)

    Nova, Isabella; Epling, Bill; Peden, Charles HF

    2014-03-31

    This special issue of Catalysis Today continues the tradition established since the 18th NAM in Cancun, 2003, of publishing the highlights coming from these catalytic after-treatment technologies sessions, where this volume contains 18 papers based on oral and poster presentations of the 23rd NAM, 2013. The guest editors would like to thank all of the catalyst scientists and engineers who presented in the "Emission control" sessions, and especially the authors who contributed to this special issue of Catalysis Today.

  8. Catalytic extraction processing of contaminated scrap metal

    SciTech Connect (OSTI)

    Griffin, T.P.; Johnston, J.E.; Payea, B.M.; Zeitoon, B.M.

    1995-12-01

    Molten Metal Technology was awarded a contract to demonstrate the applicability of the Catalytic Extraction Process, a proprietary process that could be applied to US DOE`s inventory of low level mixed waste. This paper is a description of that technology, and included within this document are discussions of: (1) Program objectives, (2) Overall technology review, (3) Organic feed conversion to synthetic gas, (4) Metal, halogen, and transuranic recovery, (5) Demonstrations, (6) Design of the prototype facility, and (7) Results.

  9. Perfect NOT transformation and conjugate transformation

    E-Print Network [OSTI]

    Fengli Yan; Ting Gao; Zhichao Yan

    2012-03-15

    The perfect NOT transformation, probabilistic perfect NOT transformation and conjugate transformation are studied. Perfect NOT transformation criteria on a quantum state set $S$ of a qubit are obtained. Two necessary and sufficient conditions for realizing a perfect NOT transformation on $S$ are derived. When these conditions are not satisfied we discuss a probabilistic perfect NOT transformation (gate). We construct a probabilistic perfect NOT machine (gate) by a general unitary-reduction operation. With a postselection of the measurement outcomes, the probabilistic NOT gate yields perfectly complements of the input states. We prove that one can realize probabilistically the NOT gate of the input states secretly chosen from a certain set $S=\\{|\\Psi_1>, |\\Psi_2>,..., |\\Psi_n>\\}$ if and only if $|\\Psi_1>, |\\Psi_2>,...,$ and $|\\Psi_n>$ are linearly independent. We also generalize the probabilistic NOT transformation to the conjugate transformation in the multi-level quantum system. The lower bound of the best possible efficiencies attained by a probabilistic perfect conjugate transformation are obtained.

  10. Discrimination of Unitary Transformations and Quantum Algorithms

    E-Print Network [OSTI]

    David Collins

    2008-11-09

    Quantum algorithms are typically understood in terms of the evolution of a multi-qubit quantum system under a prescribed sequence of unitary transformations. The input to the algorithm prescribes some of the unitary transformations in the sequence with others remaining fixed. For oracle query algorithms, the input determines the oracle unitary transformation. Such algorithms can be regarded as devices for discriminating amongst a set of unitary transformations. The question arises: "Given a set of known oracle unitary transformations, to what extent is it possible to discriminate amongst them?" We investigate this for the Deutsch-Jozsa problem. The task of discriminating amongst the admissible oracle unitary transformations results in an exhaustive collection of algorithms which can solve the problem with certainty.

  11. The Role of Organic Capping Layers of Platinum Nanoparticles in Catalytic Activity of CO Oxidation

    SciTech Connect (OSTI)

    Park, Jeong Y.; Aliaga, Cesar; Renzas, J. Russell; Lee, Hyunjoo; Somorjai, Gabor A.

    2008-12-17

    We report the catalytic activity of colloid platinum nanoparticles synthesized with different organic capping layers. On the molecular scale, the porous organic layers have open spaces that permit the reactant and product molecules to reach the metal surface. We carried out CO oxidation on several platinum nanoparticle systems capped with various organic molecules to investigate the role of the capping agent on catalytic activity. Platinum colloid nanoparticles with four types of capping layer have been used: TTAB (Tetradecyltrimethylammonium Bromide), HDA (hexadecylamine), HDT (hexadecylthiol), and PVP (poly(vinylpyrrolidone)). The reactivity of the Pt nanoparticles varied by 30%, with higher activity on TTAB coated nanoparticles and lower activity on HDT, while the activation energy remained between 27-28 kcal/mol. In separate experiments, the organic capping layers were partially removed using ultraviolet light-ozone generation techniques, which resulted in increased catalytic activity due to the removal of some of the organic layers. These results indicate that the nature of chemical bonding between organic capping layers and nanoparticle surfaces plays a role in determining the catalytic activity of platinum colloid nanoparticles for carbon monoxide oxidation.

  12. Comparison of Water-Hydrogen Catalytic Exchange Processes vs...

    Office of Environmental Management (EM)

    at Tritium Focus Group Meeting, April 22-24, 2014, Aiken, SC COMPARISON OF WATER-HYDROGEN CATALYTIC EXCHANGE PROCESSES VERSUS WATER DISTILLATION FOR WATER DETRITIATION A. Busigin,...

  13. Hydrogen-assisted catalytic ignition characteristics of different fuels

    SciTech Connect (OSTI)

    Zhong, Bei-Jing; Yang, Fan; Yang, Qing-Tao

    2010-10-15

    Hydrogen-assisted catalytic ignition characteristics of methane (CH{sub 4}), n-butane (n-C{sub 4}H{sub 10}) and dimethyl ether (DME) were studied experimentally in a Pt-coated monolith catalytic reactor. It is concluded that DME has the lowest catalytic ignition temperature and the least required H{sub 2} flow, while CH{sub 4} has the highest catalytic ignition temperature and the highest required H{sub 2} flow among the three fuels. (author)

  14. Catalytic reduction system for oxygen-rich exhaust

    DOE Patents [OSTI]

    Vogtlin, G.E.; Merritt, B.T.; Hsiao, M.C.; Wallman, P.H.; Penetrante, B.M.

    1999-04-13

    Non-thermal plasma gas treatment is combined with selective catalytic reduction to enhance NO{sub x} reduction in oxygen-rich vehicle engine exhausts. 8 figs.

  15. Piloted rich-catalytic lean-burn hybrid combustor

    DOE Patents [OSTI]

    Newburry, Donald Maurice (Orlando, FL)

    2002-01-01

    A catalytic combustor assembly which includes, an air source, a fuel delivery means, a catalytic reactor assembly, a mixing chamber, and a means for igniting a fuel/air mixture. The catalytic reactor assembly is in fluid communication with the air source and fuel delivery means and has a fuel/air plenum which is coated with a catalytic material. The fuel/air plenum has cooling air conduits passing therethrough which have an upstream end. The upstream end of the cooling conduits is in fluid communication with the air source but not the fuel delivery means.

  16. Fuel-Flexible, Low-Emissions Catalytic Combustor for Opportunity...

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

    to develop a unique, fuel-flexible catalytic combustor capable of enabling ultra-low emission, lean premixed combustion of a wide range of gaseous opportunity fuels. Fact...

  17. Passive Catalytic Approach to Low Temperature NOx Emission Abatement

    Broader source: Energy.gov [DOE]

    Numerically evaluated and optimized proposed state-of-the-art passive catalytic technology designed to reduce NOx released during vehicle cold start portion of the FTP-75 cycle

  18. Selectlive Catalytic Reducution of NOx wilth Diesel-Based Fuels...

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

    of NO by Hydrocarbons Bifunctional Catalysts for the Selective Catalytic Reduction of NO by Hydrocarbons Progress on Acidic Zirconia Mixed Oxides for Efficient NH3-SCR Catalysis...

  19. Selective Catalytic Reduction and Exhaust Gas Recirculation Systems...

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

    Reduction and Exhaust Gas Recirculation Systems Optimization Selective Catalytic Reduction and Exhaust Gas Recirculation Systems Optimization A patented EGR-SCR approach was shown...

  20. Fuel-Flexible, Low-Emissions Catalytic Combustor for Opportunity...

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

    Next Generation Manufacturing Processes project to develop a unique, fuel-flexible catalytic combustor capable of enabling ultra-low emission, lean premixed combustion of a wide...

  1. Catalytic Upgrading of Sugars to Hydrocarbons Technology Pathway...

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

    for the catalytic conversion of sugars pathway to be competitive with petroleum-derived gasoline-, diesel-, and jet-range hydrocarbon blendstocks have been identified....

  2. In-Situ Catalytic Fast Pyrolysis Technology Pathway | Department...

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

    needs that should be pursued for this pathway to be competitive with petroleum-derived blendstocks have been identified. In-Situ Catalytic Fast Pyrolysis Technology Pathway...

  3. Probing Hot Electron Flow Generated on Pt Nanoparticles with Au/TiO2 Schottky Diodes during Catalytic CO Oxidation

    E-Print Network [OSTI]

    Park, Jeong Y.

    2009-01-01

    Schottky Diodes during Catalytic CO Oxidation Jeong Y. Parkwere measured during catalytic CO oxidation at pressures ofexothermic catalytic carbon monoxide oxidation was directly

  4. Metrics for enterprise transformation

    E-Print Network [OSTI]

    Blackburn, Craig D. (Craig David), S. M. Massachusetts Institute of Technology

    2009-01-01

    The objective of this thesis is to depict the role of metrics in the evolving journey of enterprise transformation. To this end, three propositions are explored: (i) metrics and measurement systems drive transformation, ...

  5. Thin film porous membranes for catalytic sensors

    SciTech Connect (OSTI)

    Hughes, R.C.; Boyle, T.J.; Gardner, T.J. [and others

    1997-06-01

    This paper reports on new and surprising experimental data for catalytic film gas sensing resistors coated with nanoporous sol-gel films to impart selectivity and durability to the sensor structure. This work is the result of attempts to build selectivity and reactivity to the surface of a sensor by modifying it with a series of sol-gel layers. The initial sol-gel SiO{sub 2} layer applied to the sensor surprisingly showed enhanced O{sub 2} interaction with H{sub 2} and reduced susceptibility to poisons such as H{sub 2}S.

  6. LAPPED TRANSFORMS COMPRESSION

    E-Print Network [OSTI]

    de Queiroz, Ricardo L.

    Chapter 6 LAPPED TRANSFORMS FOR IMAGE COMPRESSION Ricardo L. de Queiroz Digital Imaging Technology aspects of lapped transforms and their applications to image compression. It is a subject that has been extensively studied mainly because lapped transforms are closely related to filter banks, wavelets, and time

  7. Catalytic reactor for low-Btu fuels

    DOE Patents [OSTI]

    Smith, Lance (North Haven, CT); Etemad, Shahrokh (Trumbull, CT); Karim, Hasan (Simpsonville, SC); Pfefferle, William C. (Madison, CT)

    2009-04-21

    An improved catalytic reactor includes a housing having a plate positioned therein defining a first zone and a second zone, and a plurality of conduits fabricated from a heat conducting material and adapted for conducting a fluid therethrough. The conduits are positioned within the housing such that the conduit exterior surfaces and the housing interior surface within the second zone define a first flow path while the conduit interior surfaces define a second flow path through the second zone and not in fluid communication with the first flow path. The conduit exits define a second flow path exit, the conduit exits and the first flow path exit being proximately located and interspersed. The conduits define at least one expanded section that contacts adjacent conduits thereby spacing the conduits within the second zone and forming first flow path exit flow orifices having an aggregate exit area greater than a defined percent of the housing exit plane area. Lastly, at least a portion of the first flow path defines a catalytically active surface.

  8. THE ROLE OF FLY ASH IN CATALYTIC OXIDATION OF S(IV) SLURRIES

    E-Print Network [OSTI]

    Cohen, Sidney

    2014-01-01

    THE ROLE OF FLY ASH IN CATALYTIC OXIDATION OF S(IV) SLURRIESTHE ROLE OF FLY ASH IN CATALYTIC OXIDATION OF S(IV) SLURRIESreactive species in catalytic oxidation of S(IV). so 3 2- as

  9. KINETICS AND MECHANISM FOR THE CATALYTIC OXIDATION OF SULFUR DIOXIDE ON CARBON IN AQUEOUS SUSPENSIONS

    E-Print Network [OSTI]

    Brodzinsky, R.

    2012-01-01

    AND MECHANISM FOR THE CATALYTIC OXIDATION OF SULFUR DIOXIDEmechanism for the catalytic oxidation of in an aqueous sus1ECHANISf 1 1 FOR TilE CATALYTIC OXIDATION OF SULFUR DIOXIDE

  10. Bioenergy Technologies Office R&D Pathways: Ex-Situ Catalytic...

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

    Ex-Situ Catalytic Fast Pyrolysis Bioenergy Technologies Office R&D Pathways: Ex-Situ Catalytic Fast Pyrolysis In ex-situ catalytic fast pyrolysis, biomass is heated with catalysts...

  11. Bioenergy Technologies Office R&D Pathways: In-Situ Catalytic...

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

    In-Situ Catalytic Fast Pyrolysis Bioenergy Technologies Office R&D Pathways: In-Situ Catalytic Fast Pyrolysis The in-situ catalytic fast pyrolysis pathway involves rapidly heating...

  12. Antibody-Metalloporphyrin Catalytic Assembly Mimics Natural Oxidation Enzymes

    E-Print Network [OSTI]

    Keinan, Ehud

    Antibody-Metalloporphyrin Catalytic Assembly Mimics Natural Oxidation Enzymes Shai Nimri and Ehud-metalloporphyrin assembly that catalyzes the enantioselective oxidation of aromatic sulfides to sulfoxides is presented-naphthoxy ligand. The catalytic assembly comprising antibody SN37.4 and a ruthenium- (II) porphyrin cofactor

  13. Data reconciliation and optimal operation of a catalytic naphtha reformer

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Data reconciliation and optimal operation of a catalytic naphtha reformer Tore Lid Statoil Mongstad of a semiregenerative catalytic naphtha reformer, involving 35 pseudo compo- nents. They claimed that the simplified-mail:skoge@chemeng.ntnu.no) #12;Abstract The naphtha reforming process converts low-octane gasoline blending compo- nents to high

  14. Catalytic Membrane Reactor for Extraction of Hydrogen from Bioethanol Reforming†

    E-Print Network [OSTI]

    Kuncharam, Bhanu Vardhan

    2013-11-26

    -gas-shift catalytic membrane reactor, and (2) a multi-layer design for bioethanol reforming. A two-dimensional model is developed to describe reaction and diffusion in the catalytic membrane coupled with plug-flow equations in the retentate and permeate volumes using...

  15. Digitales Video 1 Spatial Transformations

    E-Print Network [OSTI]

    spatial transformations derived for digital image warping applications in computer vision and computerDigitales Video 1 Spatial Transformations 2. SPATIAL TRANSFORMATIONS This chapter describes common graphics. A spatial transformation is a mapping function that establishes a spatial correspondence between

  16. Catalytic Hydrogenolysis of Biphenylene with Platinum, Palladium, and Nickel Phosphine Complexes

    E-Print Network [OSTI]

    Jones, William D.

    Catalytic Hydrogenolysis of Biphenylene with Platinum, Palladium, and Nickel Phosphine Complexes activation and formation by plati- num and palladium phosphine complexes.4g The oper- ating catalytic cycle

  17. A Catalytic Mechanism for Cysteine N-Terminal Nucleophile Hydrolases, as Revealed by Free Energy Simulations

    E-Print Network [OSTI]

    2012-01-01

    2 | e32397 A Catalytic Mechanism for Cysteine Ntn-Hydrolaseson the catalytic mechanism of aspartylglucosaminidase (AGA):serine protease- like mechanism with an N-terminal threonine

  18. Synthetic and Thermodynamic Investigations of Ancillary Ligand Influence on Catalytic Organometallic Systems. Final Report

    SciTech Connect (OSTI)

    Nolan, Steven

    2003-03-20

    During the grant period we have been involved in synthesizing and experimentally determining solution enthalpy values associated with partially fluorinated ligands. This has lead to the publication of manuscripts dealing with synthetic, calorimetric and catalytic behavior of partially fluorinated ligands. The collaboration with Los Alamos researchers has lead to the publication of catalytic results in sc CO{sub 2} which have proven very interesting. Furthermore, we have also examined ligands that behave as phosphine mimics. The N-heterocyclic carbenes have been explored as alternatives for tertiary phosphines and have resulted in the design and construction of efficient palladium and nickel system capable of performing C-C and C-N cross coupling reactions. The initial studies in this areas were made possible by exploratory work conducted under the DOE/EPSCoR grant.

  19. Structure and Reactivity of Surface Oxides on Pt(110) during Catalytic CO Oxidation

    SciTech Connect (OSTI)

    Ackermann, M.D.; Pedersen, T.M.; Hammer, B.; Hendriksen, B.L.M.; Bobaru, S.C.; Frenken, J.W.M.; Robach, O.; Quiros, C.

    2005-12-16

    We present the first structure determination by surface x-ray diffraction during the restructuring of a model catalyst under reaction conditions, i.e., at high pressure and high temperature, and correlate the restructuring with a change in catalytic activity. We have analyzed the Pt(110) surface during CO oxidation at pressures up to 0.5 bar and temperatures up to 625 K. Depending on the O{sub 2}/CO pressure ratio, we find three well-defined structures: namely, (i) the bulk-terminated Pt(110) surface, (ii) a thin, commensurate oxide, and (iii) a thin, incommensurate oxide. The commensurate oxide only appears under reaction conditions, i.e., when both O{sub 2} and CO are present and at sufficiently high temperatures. Density functional theory calculations indicate that the commensurate oxide is stabilized by carbonate ions (CO{sub 3}{sup 2-}). Both oxides have a substantially higher catalytic activity than the bulk-terminated Pt surface.

  20. Multi-component Zirconia-Titania Mixed Oxides: Catalytic Materials with Unprecedented Performance in the Selective Catalytic Reduction of NOx

    E-Print Network [OSTI]

    Paris-Sud XI, Universitť de

    in the Selective Catalytic Reduction of NOx with NH3 after harsh hydrothermal ageing. Nathalie MARCOTTE1#, Bernard catalytic reduction. 1. Introduction. The abatement of nitrogen oxides (NOx) and particulate matter (PM% H2O, ~ 1050 K) is a prerequisite for deNOx catalysts of tomorrow in Diesel exhaust gas treatment

  1. Preparation and characterization of VOx/TiO2 catalytic coatings on stainless steel plates for structured catalytic reactors.

    E-Print Network [OSTI]

    Boyer, Edmond

    1 Preparation and characterization of VOx/TiO2 catalytic coatings on stainless steel plates are used in the mild oxidation of hydrocarbons and NOx abatement are studied. Stainless steel (316 L) was chosen because of its large application in industrial catalytic reactors. TiO2 films on stainless steel

  2. Simulation of catalytic oxidation and selective catalytic NOx reduction in lean-exhaust hybrid vehicles

    SciTech Connect (OSTI)

    Gao, Zhiming; Daw, C Stuart; Chakravarthy, Veerathu K

    2012-01-01

    We utilize physically-based models for diesel exhaust catalytic oxidation and urea-based selective catalytic NOx reduction to study their impact on drive cycle performance of hypothetical light-duty diesel powered hybrid vehicles. The models have been implemented as highly flexible SIMULINK block modules that can be used to study multiple engine-aftertreatment system configurations. The parameters of the NOx reduction model have been adjusted to reflect the characteristics of Cu-zeolite catalysts, which are of widespread current interest. We demonstrate application of these models using the Powertrain System Analysis Toolkit (PSAT) software for vehicle simulations, along with a previously published methodology that accounts for emissions and temperature transients in the engine exhaust. Our results illustrate the potential impact of DOC and SCR interactions for lean hybrid electric and plug-in hybrid electric vehicles.

  3. Make the most of catalytic hydrogenations

    SciTech Connect (OSTI)

    Landert, J.P.; Scubla, T. [Biazzi S.A., Chailly-Montreux (Switzerland)

    1995-03-01

    Liquid-phase catalytic hydrogenation is one of the most useful and versatile reactions available for organic synthesis. Because it is environmentally clean, it has replaced other reduction processes, such as the Bechamp reaction, and zinc and sulfide reductions. Moreover, the economics are favorable, provided that raw materials free of catalyst poisons are used. The hydrogenation reaction is very selective with appropriate catalysts and can often be carried out without a solvent. Applications include reduction of unsaturated carbon compounds to saturated derivatives (for example, in vegetable-oil processing), carbonyl compounds to alcohols (such as sorbitol), and nitrocompounds to amines. the reactions are usually run in batch reactors to rapidly reach complete conversion and allow quick change-over of products. The paper describes the basics of hydrogenation; steering clear of process hazards; scale-up and optimization; and system design in practice.

  4. Biofuel from fast pyrolysis and catalytic hydrodeoxygenation.

    SciTech Connect (OSTI)

    Elliott, Douglas C.

    2015-09-04

    This review addresses recent developments in biomass fast pyrolysis bio-oil upgrading by catalytic hydrotreating. The research in the field has expanded dramatically in the past few years with numerous new research groups entering the field while existing efforts from others expand. The issues revolve around the catalyst formulation and operating conditions. Much work in batch reactor tests with precious metal catalysts needs further validation to verify long-term operability in continuous flow systems. The effect of the low level of sulfur in bio-oil needs more study to be better understood. Utilization of the upgraded bio-oil for feedstock to finished fuels is still in an early stage of understanding.

  5. Catalytic cartridge SO.sub.3 decomposer

    DOE Patents [OSTI]

    Galloway, Terry R. (Berkeley, CA)

    1982-01-01

    A catalytic cartridge surrounding a heat pipe driven by a heat source is utilized as a SO.sub.3 decomposer for thermochemical hydrogen production. The cartridge has two embodiments, a cross-flow cartridge and an axial flow cartridge. In the cross-flow cartridge, SO.sub.3 gas is flowed through a chamber and incident normally to a catalyst coated tube extending through the chamber, the catalyst coated tube surrounding the heat pipe. In the axial-flow cartridge, SO.sub.3 gas is flowed through the annular space between concentric inner and outer cylindrical walls, the inner cylindrical wall being coated by a catalyst and surrounding the heat pipe. The modular cartridge decomposer provides high thermal efficiency, high conversion efficiency, and increased safety.

  6. Catalytic cartridge SO.sub.3 decomposer

    DOE Patents [OSTI]

    Galloway, Terry R. (Berkeley, CA)

    1982-01-01

    A catalytic cartridge internally heated is utilized as a SO.sub.3 decomposer for thermochemical hydrogen production. The cartridge has two embodiments, a cross-flow cartridge and an axial flow cartridge. In the cross-flow cartridge, SO.sub.3 gas is flowed through a chamber and incident normally to a catalyst coated tube extending through the chamber, the catalyst coated tube being internally heated. In the axial-flow cartridge, SO.sub.3 gas is flowed through the annular space between concentric inner and outer cylindrical walls, the inner cylindrical wall being coated by a catalyst and being internally heated. The modular cartridge decomposer provides high thermal efficiency, high conversion efficiency, and increased safety.

  7. Catalytic cartridge SO/sub 3/ decomposer

    DOE Patents [OSTI]

    Galloway, T.R.

    1980-11-18

    A catalytic cartridge surrounding a heat pipe driven by a heat source is utilized as a SO/sub 3/ decomposer for thermochemical hydrogen production. The cartridge has two embodiments, a cross-flow cartridge and an axial flow cartridge. In the cross-flow cartridge, SO/sub 3/ gas is flowed through a chamber and incident normally to a catalyst coated tube extending through the chamber, the catalyst coated tube surrounding the heat pipe. In the axial-flow cartridge, SO/sub 3/ gas is flowed through the annular space between concentric inner and outer cylindrical walls, the inner cylindrical wall being coated by a catalyst and surrounding the heat pipe. The modular cartridge decomposer provides high thermal efficiency, high conversion efficiency, and increased safety. A fusion reactor may be used as the heat source.

  8. Li?0? in Li-0? batteries : catalytic enhancement of electrochemical oxidation and thermophysical transformations

    E-Print Network [OSTI]

    Yao, Koffi Pierre (Koffi Pierre Claver)

    2013-01-01

    Electrification of transportation in the United States is of importance in reducing dependence on foreign oil and curtailing global warming. However, optimal market penetration of electric vehicles is confronted with the ...

  9. Catalytic Transformation of Waste CO{sub 2} into Valuable Products

    SciTech Connect (OSTI)

    Anderson, Jason; Shepard, Peter; Valente, Ron

    2013-09-30

    Novomerís novel materials contain up to 50% by mass CO{sub 2} and provide a unique platform for re-using CO{sub 2} from waste industrial sources and converting it into useful products. This Report covers the progress made by Novomer during the DOE funded project (DOE Award #: DE-FE0002474) under the ďCarbon Capture and Sequestration from Industrial Sources and Innovative Concepts for Beneficial CO{sub 2} UseĒ program. This includes Phase 1 and Phase 2, including all three subphases of the latter. Novomer completed all technical and commercial objectives in both Phase 1 and Phase 2, including the six Phase 2 Objectives outlined in the SOPO within budget by the project end date of September 30, 2013. These are: validating the economics are competitive, validate the carbon footprint, validate acceptable product performance, verify robust manufacturing process, validate large markets exist, and qualify at least 3 products with customers.

  10. Catalytic Transformation of C7-C9 Methyl Benzenes over USY-based FCC Zeolite Catalyst

    E-Print Network [OSTI]

    Al-Khattaf, Sulaiman

    in the petrochemical market. Most of the currently working isomerization plants are using zeolite based catalysts. One) and the diphenyl methane mechanism. It was shown that toluene disproportionation does not require BrŲnsted acid

  11. ACCOUNTING ROADMAP TRANSFORMING LIVES

    E-Print Network [OSTI]

    ACCOUNTING ROADMAP TO SUCCESS THE TRANSFORMING LIVES COLLEGE OF BUSINESS Department of Accounting #12;TABLEOFCONTENTS Greetings from Accounting Department Chair ..............................2 What is Accounting? .......................................................................4 Successful Study

  12. Transforming Biomass - main page

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

    Transforming Biomass to Bioenergy Feedstocks The DOE Biomass Program has shaped the vision of a national, commodity-scale feedstock supply system. Much progress has been made in...

  13. Transforming America's Energy Economy Transforming America's

    E-Print Network [OSTI]

    Laboratory National Renewable Energy Laboratory Oak Ridge National Laboratory Pacific Northwest National #12;Transforming America's Energy Economy A. Introduction: A Call for Action B. Envisioning the Future of Energy B.1 Renewable and Low-Carbon Energy Sources for Electricity Production B.2 Energy

  14. Sequential tasks performed by catalytic pumps for colloidal crystallization

    E-Print Network [OSTI]

    Ali Afshar Farniya; Maria J. Esplandiu; Adrian Bachtold

    2014-10-20

    Gold-platinum catalytic pumps immersed in a chemical fuel are used to manipulate silica colloids. The manipulation relies on the electric field and the fluid flow generated by the pump. Catalytic pumps perform various tasks, such as the repulsion of colloids, the attraction of colloids, and the guided crystallization of colloids. We demonstrate that catalytic pumps can execute these tasks sequentially over time. Switching from one task to the next is related to the local change of the proton concentration, which modifies the colloid zeta potential and consequently the electric force acting on the colloids.

  15. Sequential tasks performed by catalytic pumps for colloidal crystallization

    E-Print Network [OSTI]

    Farniya, Ali Afshar; Bachtold, Adrian

    2014-01-01

    Gold-platinum catalytic pumps immersed in a chemical fuel are used to manipulate silica colloids. The manipulation relies on the electric field and the fluid flow generated by the pump. Catalytic pumps perform various tasks, such as the repulsion of colloids, the attraction of colloids, and the guided crystallization of colloids. We demonstrate that catalytic pumps can execute these tasks sequentially over time. Switching from one task to the next is related to the local change of the proton concentration, which modifies the colloid zeta potential and consequently the electric force acting on the colloids.

  16. Biochemical transformation of coals

    DOE Patents [OSTI]

    Lin, Mow S. (Rocky Point, NY); Premuzic, Eugene T. (East Moriches, NY)

    1999-03-23

    A method of biochemically transforming macromolecular compounds found in solid carbonaceous materials, such as coal is provided. The preparation of new microorganisms, metabolically weaned through challenge growth processes to biochemically transform solid carbonaceous materials at extreme temperatures, pressures, pH, salt and toxic metal concentrations is also disclosed.

  17. Deployment & Market Transformation (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2012-04-01

    NREL's deployment and market transformation (D and MT) activities encompass the laboratory's full range of technologies, which span the energy efficiency and renewable energy spectrum. NREL staff educates partners on how they can advance sustainable energy applications and also provides clients with best practices for reducing barriers to innovation and market transformation.

  18. Biochemical transformation of coals

    DOE Patents [OSTI]

    Lin, M.S.; Premuzic, E.T.

    1999-03-23

    A method of biochemically transforming macromolecular compounds found in solid carbonaceous materials, such as coal is provided. The preparation of new microorganisms, metabolically weaned through challenge growth processes to biochemically transform solid carbonaceous materials at extreme temperatures, pressures, pH, salt and toxic metal concentrations is also disclosed. 7 figs.

  19. Logarithmic transformation of response Logarithmic transformation of response

    E-Print Network [OSTI]

    Komarek, Arnost

    Logarithmic transformation of response Logarithmic transformation of response Often, support S of Y is S = (0, ). Logarithm is then one of transformations to consider when trying to obtain a correct (wrong. Model Building 1. Transformation of response #12;Logarithmic transformation of response When does

  20. Program Transformation Mechanics A Classification of Mechanisms for Program Transformation

    E-Print Network [OSTI]

    Utrecht, Universiteit

    Program Transformation Mechanics A Classification of Mechanisms for Program Transformation with a Survey of Existing Transformation Systems Jonne van Wijngaarden Eelco Visser UU-CS-2003-048 Institute Transformation Mechanics A Classification of Mechanisms for Program Transformation with a Survey of Existing

  1. Mercury Oxidation via Catalytic Barrier Filters Phase II

    SciTech Connect (OSTI)

    Wayne Seames; Michael Mann; Darrin Muggli; Jason Hrdlicka; Carol Horabik

    2007-09-30

    In 2004, the Department of Energy National Energy Technology Laboratory awarded the University of North Dakota a Phase II University Coal Research grant to explore the feasibility of using barrier filters coated with a catalyst to oxidize elemental mercury in coal combustion flue gas streams. Oxidized mercury is substantially easier to remove than elemental mercury. If successful, this technique has the potential to substantially reduce mercury control costs for those installations that already utilize baghouse barrier filters for particulate removal. Completed in 2004, Phase I of this project successfully met its objectives of screening and assessing the possible feasibility of using catalyst coated barrier filters for the oxidation of vapor phase elemental mercury in coal combustion generated flue gas streams. Completed in September 2007, Phase II of this project successfully met its three objectives. First, an effective coating method for a catalytic barrier filter was found. Second, the effects of a simulated flue gas on the catalysts in a bench-scale reactor were determined. Finally, the performance of the best catalyst was assessed using real flue gas generated by a 19 kW research combustor firing each of three separate coal types.

  2. Final Technical Report [Development of Catalytic Alkylation and Fluoroalkylation Methods

    SciTech Connect (OSTI)

    Vicic, David A.

    2014-05-01

    In the early stages of this DOE-funded research project, we sought to prepare and study a well-defined nickel-alkyl complex containing tridentate nitrogen donor ligands. We found that reaction of (TMEDA)NiMe2 (1) with terpyridine ligand cleanly led to the formation of (terpyridyl)NiMe (2), which we also determined to be an active alkylation catalyst. The thermal stability of 2 was unlike that seen for any of the active pybox ligands, and enabled a number of key studies on alkyl transfer reactions to be performed, providing new insights into the mechanism of nickel-mediated alkyl-alkyl cross-coupling reactions. In addition to the mechanistic studies, we showed that the terpyridyl nickel compounds can catalytically cross-couple alkyl iodides in yields up to 98% and bromides in yields up to 46 %. The yields for the bromides can be increased up to 67 % when the new palladium catalyst [(tpyí)Pd-Ph]I is used. The best route to the targeted [(tpy)NiBr] (1) was found to involve the comproportionation reaction of [(dme)NiBr{sub 2}] and [Ni(COD){sub 2}] in the presence of two equivalents of terpyridine. This reaction was driven to high yields of product formation (72 % isolated) by the precipitation of 1 from THF solvent.

  3. Stochastic bi-resonance without external signal in the CO O2 catalytic oxidation reaction system

    E-Print Network [OSTI]

    Yang, Lingfa

    Stochastic bi-resonance without external signal in the CO O2 catalytic oxidation reaction system reaction systems13 including the catalytic oxidation of carbon monoxide (CO O2) and the catalytic reduction; accepted 19 April 1999 The noisy dynamic behavior of a surface catalytic reaction model to describe

  4. Preconversion catalytic deoxygenation of phenolic functional groups. Quarterly technical progress report, January 1, 1992--March 31, 1992

    SciTech Connect (OSTI)

    Kubiak, C.P.

    1992-08-01

    The deoxygenation of phenols is a conceptually simple, but unusually difficult chemical transformation to achieve. The phenolic C-O bond energy of 103 kcal/mol is as strong as a benzene C-H bond and over a 10 kcal/mol stronger than the C-O bonds of methanol and ethanol. The consequence of this is that the hydrogenation/deoxygenation methods in current use require severe conditions and give low selectivities. The ongoing research described herein is based on the unprecedented, but thermodynamically promising, use of carbon monoxide as the oxygen atom acceptor for the catalytic deoxygenation of phenols.

  5. Emerging catalytic processes for the production of adipic acid

    E-Print Network [OSTI]

    Van de Vyver, Stijn

    Research efforts to find more sustainable pathways for the synthesis of adipic acid have led to the introduction of new catalytic processes for producing this commodity chemical from alternative resources. With a focus on ...

  6. Control of Substrate Access to the Active Site and Catalytic...

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

    Control of Substrate Access to the Active Site and Catalytic Mechanism of Methane and Toluene Monooxygenases Friday, June 22, 2012 - 3:30pm SSRL Main Conference Room 137-322 Prof....

  7. An Energy Analysis of the Catalytic Combustion Burner†

    E-Print Network [OSTI]

    Dong, Q.; Zhang, S.; Duan, Z.; Zhou, Q.

    2006-01-01

    The gas boilers of conventional flame always produce varying degrees of combustion products NOx and CO, which pollute the environment and waste energy. As a new way of combustion, catalytic combustion breaks the flammable limits of conventional...

  8. Hydrogen permeable protective coating for a catalytic surface

    DOE Patents [OSTI]

    Liu, Ping (Irvine, CA); Tracy, C. Edwin (Golen, CO); Pitts, J. Roland (Lakewood, CO); Lee, Se-Hee (Lakewood, CO)

    2007-06-19

    A protective coating for a surface comprising a layer permeable to hydrogen, said coating being deposited on a catalyst layer; wherein the catalytic activity of the catalyst layer is preserved.

  9. Catalytic oxidation of VOC`s and air toxics

    SciTech Connect (OSTI)

    Lassen, M.A.; Chu, W. [Johnson Matthey, Wayne, PA (United States)

    1995-12-31

    Catalytic oxidation for VOC control of stationary sources has been in use since the 1940`s for energy recovery and odor control. Widespread use of catalytic oxidation, as a means for controlling emissions began in earnest in the early 1970`s with the passage of the Clean Air Act of 1970. Since that time, catalytic technology has undergone many improvements and advancements. Some of these include higher destruction efficiencies at lower temperatures, poison resistance, enhanced durability and the ability to effectively control halogenated hydrocarbon compounds. This is particularly important for meeting the Title III requirements, since many of the air toxics regulated under Title III are halogenated VOC`s. This paper will describe catalytic oxidation, how it works, its benefits and limitations, its cost relative to thermal, and describe recent technology advances.

  10. Direct Catalytic Upgrading of Current Dilute Alcohol Fermentation...

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

    Direct Catalytic Upgrading of Current Dilute Alcohol Fermentation Streams to Hydrocarbons for Fungible Fuels 2.3.1.100 Chaitanya Narula, 1 Zhenglong Li, 1 E. Casbeer, 1 Robert A....

  11. Catalytic H2O2 decomposition on palladium surfaces†

    E-Print Network [OSTI]

    Salinas, S. Adriana

    1998-01-01

    The catalytic decomposition of H?O? at smooth single-crystal and polycrystalline palladium surfaces that had been subjected to various surface modifications has been studied. Monolayer and submonolayer coverages of I, Br and Cl adsorbates were used...

  12. In situ XAS Characterization of Catalytic Nano-Materials with...

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

    XAS Characterization of Catalytic Nano-Materials with Applications to Fuel Cells and Batteries Friday, July 12, 2013 - 11:00am SLAC, Conference Room 137-322 Presented by Qingying...

  13. Transformer Abdullah Al-Otaibi

    E-Print Network [OSTI]

    Masoudi, Husain M.

    Transformer Abdullah Al-Otaibi ID#242374 Section#2 Abstract- this is a brief description for transformer and how it works. I. DEFINITION A transformer is a device that transfers electrical energy from of the transformer in 1831. The transformer is used by Faraday only to demonstrate the principle of electromagnetic

  14. Transformation Algebra R. J. Renka

    E-Print Network [OSTI]

    Renka, Robert

    Transformation Algebra R. J. Renka Department of Computer Science & Engineering University of North Texas 03/21/2011 R. J. Renka Transformation Algebra #12;Linear Transformations A point with Cartesian transformations. A linear transformation L on R3 is represented by a 3 by 3 matrix A. In fact, there is a 1

  15. A discrete fractional random transform

    E-Print Network [OSTI]

    Zhengjun Liu; Haifa Zhao; Shutian Liu

    2006-05-20

    We propose a discrete fractional random transform based on a generalization of the discrete fractional Fourier transform with an intrinsic randomness. Such discrete fractional random transform inheres excellent mathematical properties of the fractional Fourier transform along with some fantastic features of its own. As a primary application, the discrete fractional random transform has been used for image encryption and decryption.

  16. Multiple, Simultaneous, Martensitic Transformations: Implications on Transformation Texture Intensities

    E-Print Network [OSTI]

    Cambridge, University of

    kind of martensite to be followed as a function of the steel temperature. The problem is relevantMultiple, Simultaneous, Martensitic Transformations: Implications on Transformation Texture, multiple martensitic transformations. Abstract. A theory is developed for martensite variants that have

  17. Lorentz transformation by mimicking the Lorentz transformation

    E-Print Network [OSTI]

    Bernhard Rothenstein; Stefan Popescu

    2007-09-24

    We show that starting with the fact that special relativity theory is concerned with a distortion of the observed length of a moving rod, without mentioning if it is a "contraction" or "dilation", we can derive the Lorentz transformations for the spacetime coordinates of the same event. This derivation is based on expressing the length of the moving rod as a sum of components with all the lengths involved in this summation being measured by the observers of the same inertial reference frame.

  18. Northwestern University Facility for Clean Catalytic Process Research

    SciTech Connect (OSTI)

    Marks, Tobin Jay

    2013-05-08

    Northwestern University with DOE support created a Facility for Clean Catalytic Process Research. This facility is designed to further strengthen our already strong catalysis research capabilities and thus to address these National challenges. Thus, state-of-the art instrumentation and experimentation facility was commissioned to add far greater breadth, depth, and throughput to our ability to invent, test, and understand catalysts and catalytic processes, hence to improve them via knowledge-based design and evaluation approaches.

  19. Catalytic Reactor For Oxidizing Mercury Vapor

    DOE Patents [OSTI]

    Helfritch, Dennis J. (Baltimore, MD)

    1998-07-28

    A catalytic reactor (10) for oxidizing elemental mercury contained in flue gas is provided. The catalyst reactor (10) comprises within a flue gas conduit a perforated corona discharge plate (30a, b) having a plurality of through openings (33) and a plurality of projecting corona discharge electrodes (31); a perforated electrode plate (40a, b, c) having a plurality of through openings (43) axially aligned with the through openings (33) of the perforated corona discharge plate (30a, b) displaced from and opposing the tips of the corona discharge electrodes (31); and a catalyst member (60a, b, c, d) overlaying that face of the perforated electrode plate (40a, b, c) opposing the tips of the corona discharge electrodes (31). A uniformly distributed corona discharge plasma (1000) is intermittently generated between the plurality of corona discharge electrode tips (31) and the catalyst member (60a, b, c, d) when a stream of flue gas is passed through the conduit. During those periods when corona discharge (1000) is not being generated, the catalyst molecules of the catalyst member (60a, b, c, d) adsorb mercury vapor contained in the passing flue gas. During those periods when corona discharge (1000) is being generated, ions and active radicals contained in the generated corona discharge plasma (1000) desorb the mercury from the catalyst molecules of the catalyst member (60a, b, c, d), oxidizing the mercury in virtually simultaneous manner. The desorption process regenerates and activates the catalyst member molecules.

  20. Catalytic pyrolysis using UZM-39 aluminosilicate zeolite

    DOE Patents [OSTI]

    Nicholas, Christopher P; Boldingh, Edwin P

    2014-10-07

    A new family of coherently grown composites of TUN and IMF zeotypes has been synthesized and shown to be effective catalysts for catalytic pyrolysis of biomass. These zeolites are represented by the empirical formula. Na.sub.nM.sub.m.sup.n+R.sub.rQ.sub.qAl.sub.1-xE.sub.xSi.sub.yO.s- ub.z where M represents zinc or a metal or metals from Group 1, Group 2, Group 3 or the lanthanide series of the periodic table, R is an A,.OMEGA.-dihalosubstituted paraffin such as 1,4-dibromobutane, Q is a neutral amine containing 5 or fewer carbon atoms such as 1-methylpyrrolidine and E is a framework element such as gallium. The process involves contacting a carbonaceous biomass feedstock with UZM-39 at pyrolysis conditions to produce pyrolysis gases comprising hydrocarbons. The catalyst catalyzes a deoxygenation reaction converting oxygenated hydrocarbons into hydrocarbons and removing the oxygen as carbon oxides and water. A portion of the pyrolysis gases is condensed to produce low oxygen biomass-derived pyrolysis oil.

  1. Catalytic pyrolysis using UZM-39 aluminosilicate zeolite

    DOE Patents [OSTI]

    Nicholas, Christpher P; Boldingh, Edwin P

    2013-12-17

    A new family of coherently grown composites of TUN and IMF zeotypes has been synthesized and show to be effective catalysts for catalytic pyrolysis of biomass. These zeolites are represented by the empirical formula. Na.sub.nM.sub.m.sup.n+R.sub.rQ.sub.qAl.sub1-xE.sub.xSi.sub.yO.s- ub.z where M represents zinc or a metal or metals from Group 1, Group 2, Group 3 or the lanthanide series of the periodic table, R is an A,.OMEGA.-dihalosubstituted paraffin such as 1,4-dibromobutane, Q is a neutral amine containing 5 or fewer carbon atoms such as 1-methylpyrrolidine and E is a framework element such as gallium. The process involves contacting a carbonaceous biomass feedstock with UZM-39 at pyrolysis conditions to produce pyrolysis gases comprising hydrocarbons. The catalyst catalyzes a deoxygenation reaction converting oxygenated hyrdocarbons into hydrocarbons removing the oxygen as carbon oxides and water. A portion of the pyrolysis gases is condensed to produce low oxygen biomass-derived pyrolysis oil.

  2. Microchannel Reactor System for Catalytic Hydrogenation

    SciTech Connect (OSTI)

    Adeniyi Lawal; Woo Lee; Ron Besser; Donald Kientzler; Luke Achenie

    2010-12-22

    We successfully demonstrated a novel process intensification concept enabled by the development of microchannel reactors, for energy efficient catalytic hydrogenation reactions at moderate temperature, and pressure, and low solvent levels. We designed, fabricated, evaluated, and optimized a laboratory-scale microchannel reactor system for hydrogenation of onitroanisole and a proprietary BMS molecule. In the second phase of the program, as a prelude to full-scale commercialization, we designed and developed a fully-automated skid-mounted multichannel microreactor pilot plant system for multiphase reactions. The system is capable of processing 1 Ė 10 kg/h of liquid substrate, and an industrially relevant immiscible liquid-liquid was successfully demonstrated on the system. Our microreactor-based pilot plant is one-of-akind. We anticipate that this process intensification concept, if successfully demonstrated, will provide a paradigm-changing basis for replacing existing energy inefficient, cost ineffective, environmentally detrimental slurry semi-batch reactor-based manufacturing practiced in the pharmaceutical and fine chemicals industries.

  3. Catalytic oxidation of hydrocarbons and alcohols by carbon dioxide on oxide catalysts

    SciTech Connect (OSTI)

    Krylov, O.V. . N.N. Semenov Inst. of Chemical Physics); Mamedov, A.Kh.; Mirzabekova, S.R. . Yu.G. Mamedaliev Inst. of Petrochemical Processes)

    1995-02-01

    The great interest displayed lately in heterogeneous catalytic reactions of carbon dioxide is caused by two reasons: (1) the necessity to fight the greenhouse effect and (2) the exhaust of carbon raw material sources. Reactions of oxidative transformation of organic compounds of different classes (alkanes, alkenes, and alcohols) with a nontraditional oxidant, carbon dioxide, were studied on oxide catalysts Fe-O, Cr-O, Mn-O and on multicomponent systems based on manganese oxide. The supported manganese oxide catalysts are active, selective, and stable in conversion of the CH[sub 4] + CO[sub 2] mixture into synthesis gas and in oxidative dehydrogenation of C[sub 2] [minus] C[sub 7] hydrocarbons and the lower alcohols. Unlike metal catalysts manganese oxide based catalysts do not form a carbon layer during the reaction.

  4. The Quantum Mellin transform

    E-Print Network [OSTI]

    J. Twamley; G. J. Milburn

    2007-02-12

    We uncover a new type of unitary operation for quantum mechanics on the half-line which yields a transformation to ``Hyperbolic phase space''. We show that this new unitary change of basis from the position x on the half line to the Hyperbolic momentum $p_\\eta$, transforms the wavefunction via a Mellin transform on to the critial line $s=1/2-ip_\\eta$. We utilise this new transform to find quantum wavefunctions whose Hyperbolic momentum representation approximate a class of higher transcendental functions, and in particular, approximate the Riemann Zeta function. We finally give possible physical realisations to perform an indirect measurement of the Hyperbolic momentum of a quantum system on the half-line.

  5. Transformation inverse design

    E-Print Network [OSTI]

    Liu, David

    We present a new technique for the design of transformation-optics devices based on large-scale optimization to achieve the optimal effective isotropic dielectric materials within prescribed index bounds, which is ...

  6. TRANSFORMATION TOUGHENING IN CERAMICS

    E-Print Network [OSTI]

    Evans, A.G.

    2013-01-01

    Preprint ~. Submitted to Advances in Ceramics TRANSFORMATIONTOUGHENING IN CERAMICS A.G. Evans, D.B. Marshall, and N.H.TRANSFORMATION TOUGHENING IN CERAMICS by Ao Go Evans, D. Be

  7. Series Transmission Line Transformer

    DOE Patents [OSTI]

    Buckles, Robert A. (Livermore, CA); Booth, Rex (Livermore, CA); Yen, Boris T. (El Cerrito, CA)

    2004-06-29

    A series transmission line transformer is set forth which includes two or more of impedance matched sets of at least two transmissions lines such as shielded cables, connected in parallel at one end ans series at the other in a cascading fashion. The cables are wound about a magnetic core. The series transmission line transformer (STLT) which can provide for higher impedance ratios and bandwidths, which is scalable, and which is of simpler design and construction.

  8. Catalytic activity of silanols on carbamate-functionalized surface assemblies: Monoalkoxy versus trialkoxy silanes

    SciTech Connect (OSTI)

    Blackledge, C.; McDonald, J.D.

    1999-11-09

    Aminosilanes were protected with benzyloxylcarbonyl succinimidyl ester (CBZ-SE) in solution, forming carbamates. Investigations of surface assemblies made of CBZ-protected aminosilanes were done using XPS, contact angle measurements, and an amine reactive fluorescent probe. Spontaneous loss of the protection group was observed and determined to be caused by the catalytic effect of silanols from both the surface and the assembling silanes. The use of CBZ-protected monoalkoxy, which require days to assemble, as opposed to di- and trialkoxy silanes which require only hours, mitigated the deprotection.

  9. Sandia Energy - Past Market Transformation Activities

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

    Past Market Transformation Activities Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Solar Market Transformation Past Market Transformation...

  10. Plasma-assisted catalytic storage reduction system

    DOE Patents [OSTI]

    Penetrante, Bernardino M. (San Ramon, CA); Vogtlin, George E. (Fremont, CA); Merritt, Bernard T. (Livermore, CA); Brusasco, Raymond M. (Livermore, CA)

    2002-01-01

    A two-stage method for NO.sub.x reduction in an oxygen-rich engine exhaust comprises a plasma oxidative stage and a storage reduction stage. The first stage employs a non-thermal plasma treatment of NO.sub.x gases in an oxygen-rich exhaust and is intended to convert NO to NO.sub.2 in the presence of O.sub.2 and hydrocarbons. The second stage employs a lean NO.sub.x trap to convert such NO.sub.2 to environmentally benign gases that include N.sub.2, CO.sub.2, and H.sub.2 O. By preconverting NO to NO.sub.2 in the first stage with a plasma, the efficiency of the second stage for NO.sub.x reduction is enhanced. For example, an internal combustion engine exhaust is connected by a pipe to a first chamber in which a non-thermal plasma converts NO to NO.sub.2 in the presence of O.sub.2 and hydrocarbons, such as propene. A flow of such hydrocarbons (C.sub.x H.sub.y) is input from usually a second pipe into at least a portion of the first chamber. The NO.sub.2 from the plasma treatment proceeds to a storage reduction catalyst (lean NO.sub.x trap) that converts NO.sub.2 to N.sub.2, CO.sub.2, and H.sub.2 O, and includes a nitrate-forming catalytic site. The hydrocarbons and NO.sub.x are simultaneously reduced while passing through the lean-NO.sub.x trap catalyst. The method allows for enhanced NO.sub.x reduction in vehicular engine exhausts, particularly those having relatively high sulfur contents.

  11. Plasma-assisted catalytic storage reduction system

    DOE Patents [OSTI]

    Penetrante, Bernardino M. (San Ramon, CA); Vogtlin, George E. (Fremont, CA); Merritt, Bernard T. (Livermore, CA); Brusasco, Raymond M. (Livermore, CA)

    2000-01-01

    A two-stage method for NO.sub.x reduction in an oxygen-rich engine exhaust comprises a plasma oxidative stage and a storage reduction stage. The first stage employs a non-thermal plasma treatment of NO.sub.x gases in an oxygen-rich exhaust and is intended to convert NO to NO.sub.2 in the presence of O.sub.2 and hydrocarbons. The second stage employs a lean NO.sub.x trap to convert such NO.sub.2 to environmentally benign gases that include N.sub.2, CO.sub.2, and H.sub.2 O. By preconverting NO to NO.sub.2 in the first stage with a plasma, the efficiency of the second stage for NO.sub.x reduction is enhanced. For example, an internal combustion engine exhaust is connected by a pipe to a first chamber in which a non-thermal plasma converts NO to NO.sub.2 in the presence of O.sub.2 and hydrocarbons, such as propene. A flow of such hydrocarbons (C.sub.x H.sub.y) is input from usually a second pipe into at least a portion of the first chamber. The NO.sub.2 from the plasma treatment proceeds to a storage reduction catalyst (lean NO.sub.x trap) that converts NO.sub.2 to N.sub.2, CO.sub.2, and H.sub.2 O, and includes a nitrate-forming catalytic site. The hydrocarbons and NO.sub.x are simultaneously reduced while passing through the lean-NO.sub.x trap catalyst. The method allows for enhanced NO.sub.x reduction in vehicular engine exhausts, particularly those having relatively high sulfur contents.

  12. Optical transformation from chirplet to fractional Fourier transformation kernel

    E-Print Network [OSTI]

    Hong-yi Fan; Li-yun Hu

    2009-02-11

    We find a new integration transformation which can convert a chirplet function to fractional Fourier transformation kernel, this new transformation is invertible and obeys Parseval theorem. Under this transformation a new relationship between a phase space function and its Weyl-Wigner quantum correspondence operator is revealed.

  13. Laplace Transforms An integral transform is an operator

    E-Print Network [OSTI]

    Ikenaga, Bruce

    9≠28≠1998 Laplace Transforms An integral transform is an operator F (s) = Z b a K(s; t)f(t) dt: The input to the transform is the function f(t); the output is the function F (s). (By convention, small letters denote the inputs to a transform, and the corresponding capital letters denote the corresponding

  14. Enhanced thermal and gas flow performance in a three-way catalytic converter through use of insulation within the ceramic monolith

    Broader source: Energy.gov [DOE]

    Emissions performance comparison of conventional catalytic converter with multi-channel catalytic converter (ceramic fiber insulation layers introduced into ceramic monolith of three-way catalytic converter)

  15. CX-011250: Categorical Exclusion Determination | Department of...

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

    Determination Transforming Photovoltaic Installations Toward Dispatchable, Schedulable Energy Solutions CX(s) Applied: B3.6, B5.15 Date: 10172013 Location(s): Oregon...

  16. Ultra Low NOx Catalytic Combustion for IGCC Power Plants

    SciTech Connect (OSTI)

    Shahrokh Etemad; Benjamin Baird; Sandeep Alavandi; William Pfefferle

    2008-03-31

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

  17. IN SITU INFRARED STUDY OF CATALYTIC DECOMPOSITION OF NO

    SciTech Connect (OSTI)

    KHALID ALMUSAITEER; RAM KRISHNAMURTHY; STEVEN S.C. CHUANG

    1998-08-18

    The growing concerns for the environment and increasingly stringent standards for NO emission have presented a major challenge to control NO emissions from electric utility plants and automobiles. Catalytic decomposition of NO is the most attractive approach for the control of NO emission for its simplicity. Successful development of an effective catalyst for NO decomposition will greatly decrease the equipment and operation cost of NO control. Due to lack of understanding of the mechanism of NO decomposition, efforts on the search of an effective catalyst have been unsuccessful. Scientific development of an effective catalyst requires fundamental understanding of the nature of active site, the rate-limiting step, and an approach to prolong the life of the catalyst. Research is proposed to study the reactivity of adsorbates for the direct NO decomposition and to investigate the feasibility of two novel approaches for improving catalyst activity and resistance to sintering. The first approach is the use of silanation to stabilize metal crystallites and supports for Cu-ZSM-5 and promoted Pt catalysts; the second is utilization of oxygen spillover and desorption to enhance NO decomposition activity. An innovative infrared reactor system will be used to observe and determine the dynamic behavior and the reactivity of adsorbates during NO decomposition, oxygen spillover, and silanation. A series of experiments including X-ray diffraction, temperature programmed desorption, temperature programmed reaction, X-ray photoelectron spectroscopy will be used to characterized the catalysts. The information obtained from this study will provide a scientific basis for developing an effective catalyst for the NO decomposition under practical flue gas conditions.

  18. Discrete Fourier Transform Javier Montoya

    E-Print Network [OSTI]

    Giger, Christine

    Discrete Fourier Transform Javier Montoya Photogrammetry and Remote Sensing ETH Zurich March 16, 2012 1 Introduction The Discrete form of the Fourier transform is known as Discrete Fourier Transform domain using the Inverse Discrete Fourier Transform (IDFT): f(x) = 1 N N-1 x=0 F(u)ej 2 N ux for u = 0, 1

  19. Laplace Transform May 7, 2008

    E-Print Network [OSTI]

    Mead, Jodi L.

    MATH 333 Laplace Transform Lab 9 May 7, 2008 In this lab we will compute the Laplace transform symbolically and the inverse Laplace transform both symbolically and numerically. Symbolic representation The command syms assigns a variable to be symbolic, laplace(f) finds the Laplace transform of a function f

  20. Dihydrogen activation by mixed platinum- and palladium-gold cluster compounds. Homogeneous catalytic H{sub 2}-D{sub 2} equilibration

    SciTech Connect (OSTI)

    Aubart, M.A.; Chandler, B.D.; Gould, R.A.T.

    1994-08-17

    Platinum- and palladium-gold cluster compounds were evaluated with respect to their ability to catalyze H{sub 2}-D{sub 2} equilibration. In addition, these phosphine-stabilized complexes were structurally characterized. Mechanistic studies for this reaction were performed by kinetic and spectroscopic analysis. The catalytic reaction appears to occur in three steps, which were determined.

  1. Symmetry transformations in Batalin-Vilkovisky formalism

    E-Print Network [OSTI]

    Albert Schwarz

    1993-10-19

    This short note is closely related to Sen-Zwiebach paper on gauge transformations in Batalin-Vilkovisky theory (hep-th 9309027). We formulate some conditions of physical equivalence of solutions to the quantum master equation and use these conditions to give a very transparent analysis of symmetry transformations in BV-approach. We prove that in some sense every quantum observable (i.e. every even function $H$ obeying $\\Delta_{\\rho}(He^S)=0$) determines a symmetry of the theory with the action functional $S$ satisfying quantum master equation $\\Delta_{\\rho}e^S=0$ \\end

  2. pH control of the structure, composition, and catalytic activity of sulfated zirconia

    SciTech Connect (OSTI)

    Ivanov, Vladimir K.; Materials Science Department, Moscow State University, Moscow 119991 ; Baranchikov, Alexander Ye.; Kopitsa, Gennady P.; Lermontov, Sergey A.; Yurkova, Lyudmila L.; Gubanova, Nadezhda N.; Petersburg Nuclear Physics Institute, Orlova Roscha, Gatchina 188300 ; Ivanova, Olga S.; Lermontov, Anatoly S.; Rumyantseva, Marina N.; Vasilyeva, Larisa P.; Sharp, Melissa; Pranzas, P. Klaus; Tretyakov, Yuri D.

    2013-02-15

    We report a detailed study of structural and chemical transformations of amorphous hydrous zirconia into sulfated zirconia-based superacid catalysts. Precipitation pH is shown to be the key factor governing structure, composition and properties of amorphous sulfated zirconia gels and nanocrystalline sulfated zirconia. Increase in precipitation pH leads to substantial increase of surface fractal dimension (up to {approx}2.7) of amorphous sulfated zirconia gels, and consequently to increase in specific surface area (up to {approx}80 m{sup 2}/g) and simultaneously to decrease in sulfate content and total acidity of zirconia catalysts. Complete conversion of hexene-1 over as synthesized sulfated zirconia catalysts was observed even under ambient conditions. - Graphical abstract: Surface fractal dimension of amorphous sulfated zirconia and specific surface area and catalytic activity of crystalline sulfated zirconia as a function of precipitation pH. Highlights: Black-Right-Pointing-Pointer Structural transformation of amorphous hydrous zirconia into sulfated zirconia is studied. Black-Right-Pointing-Pointer Precipitation pH controls surface fractal dimension of amorphous zirconia gels. Black-Right-Pointing-Pointer Precipitation pH is the key factor governing properties of sulfated zirconia.

  3. Novel Fast Pyrolysis/Catalytic Technology for the Production of Stable Upgraded Liquids

    SciTech Connect (OSTI)

    Oyama, Ted; Agblevor, Foster; Battaglia, Francine; Klein, Michael

    2013-01-18

    The objective of the proposed research is the demonstration and development of a novel biomass pyrolysis technology for the production of a stable bio-oil. The approach is to carry out catalytic hydrodeoxygenation (HDO) and upgrading together with pyrolysis in a single fluidized bed reactor with a unique two-level design that permits the physical separation of the two processes. The hydrogen required for the HDO will be generated in the catalytic section by the water-gas shift reaction employing recycled CO produced from the pyrolysis reaction itself. Thus, the use of a reactive recycle stream is another innovation in this technology. The catalysts will be designed in collaboration with BASF Catalysts LLC (formerly Engelhard Corporation), a leader in the manufacture of attrition-resistant cracking catalysts. The proposed work will include reactor modeling with state-of-the-art computational fluid dynamics in a supercomputer, and advanced kinetic analysis for optimization of bio-oil production. The stability of the bio-oil will be determined by viscosity, oxygen content, and acidity determinations in real and accelerated measurements. A multi-faceted team has been assembled to handle laboratory demonstration studies and computational analysis for optimization and scaleup.

  4. Fuel Flexible, Low Emission Catalytic Combustor for Opportunity Fuel Applications

    SciTech Connect (OSTI)

    Eteman, Shahrokh

    2013-06-30

    Limited fuel resources, increasing energy demand and stringent emission regulations are drivers to evaluate process off-gases or process waste streams as fuels for power generation. Often these process waste streams have low energy content and/or highly reactive components. Operability of low energy content fuels in gas turbines leads to issues such as unstable and incomplete combustion. On the other hand, fuels containing higher-order hydrocarbons lead to flashback and auto-ignition issues. Due to above reasons, these fuels cannot be used directly without modifications or efficiency penalties in gas turbine engines. To enable the use of these wide variety of fuels in gas turbine engines a rich catalytic lean burn (RCLģ) combustion system was developed and tested in a subscale high pressure (10 atm.) rig. The RCLģ injector provided stability and extended turndown to low Btu fuels due to catalytic pre-reaction. Previous work has shown promise with fuels such as blast furnace gas (BFG) with LHV of 85 Btu/ft3 successfully combusted. This program extends on this work by further modifying the combustor to achieve greater catalytic stability enhancement. Fuels containing low energy content such as weak natural gas with a Lower Heating Value (LHV) of 6.5 MJ/m3 (180 Btu/ft3 to natural gas fuels containing higher hydrocarbon (e.g ethane) with LHV of 37.6 MJ/m3 (1010 Btu/ft3) were demonstrated with improved combustion stability; an extended turndown (defined as the difference between catalytic and non-catalytic lean blow out) of greater than 250oF was achieved with CO and NOx emissions lower than 5 ppm corrected to 15% O2. In addition, for highly reactive fuels the catalytic region preferentially pre-reacted the higher order hydrocarbons with no events of flashback or auto-ignition allowing a stable and safe operation with low NOx and CO emissions.

  5. Enhancing the Catalytic Activity of Site-Isolated Heterogeneous Transition Metal Expoxidation Catalysts Prepared via the Thermolytic Molecular Precursor Method

    E-Print Network [OSTI]

    Cordeiro, Paul Joseph

    2010-01-01

    applied to a variety of catalytic oxidation reactions. 11-1548 h. Table 3. Catalytic 1-octene oxidation with tert-butylcatalysts. Table 4. Catalytic 1-octene oxidation with H 2 O

  6. Catalytic studies of supported Pd-Au catalysts†

    E-Print Network [OSTI]

    Boopalachandran, Praveenkumar

    2006-08-16

    -Au Bimetallic Supported Catalysts Palladium (Pd) is a well known catalyst for many reactions which are of industrial and environmental importance [7]. A major drawback of using Pd-only catalysts is the formation of carbides, i.e. PdCx, as shown in the Fig. 1... reveal that the addition of gold to palladium catalysts has pronounced catalytic effect [3, 6]. It is plausible that the electronic and geometric properties are tuned by the addition of Au with highly optimized sites [3, 6, 11]. Also, model catalytic...

  7. Abstract Coordinate Transforms in Kinematic Changeable Sets and their Properties

    E-Print Network [OSTI]

    Ya. I. Grushka

    2015-04-14

    One of the fundamental postulates of the special relativity theory is existence of a single system of universal coordinate transforms for inertial reference frames, that is coordinate transforms, which are uniquely determined by space-time coordinates of a material point. In this paper the abstract mathematical theory of coordinate transforms in kinematic changeable sets is developed. In particular it is proved the formal possibility of existence of kinematics, which do not allow universal coordinate transforms. Such kinematics may be applied for simulation the evolution of physical systems under the condition of hypothesis on existence of particle-dependent velocity of light.

  8. TO TRANSFORM BIOMEDICAL ENGINEERING

    E-Print Network [OSTI]

    Bermķdez, Josť Luis

    IT'S TIME TO TRANSFORM BIOMEDICAL ENGINEERING EDUCATION #12;Charles H. & Bettye Barclay Professor Head, Department of Biomedical Engineering Texas A&M University We're dedicated to solving the world in biomedical engineering research and education ≠ and we're well on our way. Our faculty continues to engineer

  9. ACCOUNTING ROADMAP TRANSFORMING LIVES

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    ACCOUNTING ROADMAP TO SUCCESS THE TRANSFORMING LIVES COLLEGE OF BUSINESS Department of Accounting #12;TABLEOFCONTENTS Greetings from Accounting Department Chair 2 What is Accounting? 4 Successful Accounting Career Paths 8 Careers in Managerial Accounting 9 Careers in Government/Not-for-Profit (GNP

  10. Chemical Transformations in Wetlands

    E-Print Network [OSTI]

    Gray, Matthew

    ) as a byproduct. Methane "Swamp gas" Natural Greenhouse Gas CH4 Release (mg C/m2 d) Bogs (150) Marshes (90 associated with breakdown of organic C and nitrogenous waste and for respiration! NOTE: Microbial populations. CO2 + H2O H2CO3 Reduction of Ferric Iron Hydroxides #12;3 Nitrogen Transformations First e- Acceptor

  11. Probabilistically Accurate Program Transformations

    E-Print Network [OSTI]

    Rinard, Martin

    of loop perforation (which transforms loops to execute fewer iterations) to a set of computational the probabilistic guarantees for those bounds. 1.1 Loop Perforation In this paper, we focus on loop perforation demonstrate the util- ity and effectiveness of loop perforation in reducing the amount of time (and/or other

  12. Catalytic combustion in internal combustion engines: A possible explanation for the Woschni effect in thermally-insulated diesel engines. Interim report

    SciTech Connect (OSTI)

    Jones, R.L.

    1996-11-15

    This report describes research undertaken to determine if catalytic combustion effects occur with the use of zirconia (ZrO{sub 2}) thermal barrier coatings (TBCs), or other coatings, in diesel engines, and if so, whether these effects have significant impact upon engine combustion, fuel economy, or pollutant emissions. A simple furnace system was used to identify catalytic combustion effects in the ignition and combustion of propane/air mixtures over catalyst-doped m-ZrO{sub 2} spheres. Three classes of catalysts were examined: zirconia-stabilizing oxides (CeO{sub 2}, Y{sub 2}O{sub 3}, MgO), transition metal oxides (Co{sub 3}O{sub 4}, Cr{sub 2}O{sub 3}, Fe{sub 2}O{sub 3}), and noble metals (Pt). Each class exhibited characteristic combustion effects, with the ignition temperature increasing, e.g., from approximately 2000 deg C for Pt to 5500 deg C for the stabilizing oxides. The results suggest that the Woschni effect, a controversial phenomenon wherein thermal-insulating measures are postulated to actually increase heat transfer from the diesel combustion chamber, may be only a manifestation of catalytic combustion. Previous research on catalytic combustion in internal combustion engines is briefly reviewed and discussed. An earlier version of this report is to be published in J. Surface and Coatings Technology as `Catalytic Combustion Effects on m-ZrO{sub 2} Doped with Various Metal Nitrates.`

  13. Incorporation of Catalytic Compounds in the Porosity of SiC Wall...

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

    Incorporation of Catalytic Compounds in the Porosity of SiC Wall Flow Filters - 4 Way Catalyst and DeNOx Application examples Incorporation of Catalytic Compounds in the Porosity...

  14. Continued investigations of the catalytic reduction of N? to NH? by molybdenum triamidoamine complexes

    E-Print Network [OSTI]

    Hanna, Brian S. (Brian Stewart)

    2011-01-01

    A study of the effects of employing different solvents and the introduction of dihydrogen during the catalytic reduction of dinitrogen to ammonia with [HIPTN 3N]Mo complexes was completed. During a catalytic reaction, the ...

  15. Methods of using structures including catalytic materials disposed within porous zeolite materials to synthesize hydrocarbons

    DOE Patents [OSTI]

    Rollins, Harry W. (Idaho Falls, ID); Petkovic, Lucia M. (Idaho Falls, ID); Ginosar, Daniel M. (Idaho Falls, ID)

    2011-02-01

    Catalytic structures include a catalytic material disposed within a zeolite material. The catalytic material may be capable of catalyzing a formation of methanol from carbon monoxide and/or carbon dioxide, and the zeolite material may be capable of catalyzing a formation of hydrocarbon molecules from methanol. The catalytic material may include copper and zinc oxide. The zeolite material may include a first plurality of pores substantially defined by a crystal structure of the zeolite material and a second plurality of pores dispersed throughout the zeolite material. Systems for synthesizing hydrocarbon molecules also include catalytic structures. Methods for synthesizing hydrocarbon molecules include contacting hydrogen and at least one of carbon monoxide and carbon dioxide with such catalytic structures. Catalytic structures are fabricated by forming a zeolite material at least partially around a template structure, removing the template structure, and introducing a catalytic material into the zeolite material.

  16. Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine

    E-Print Network [OSTI]

    Peck, Jhongwoo, 1976-

    2003-01-01

    As part of the MIT micro-gas turbine engine project, the development of a hydrocarbon-fueled catalytic micro-combustion system is presented. A conventionally-machined catalytic flow reactor was built to simulate the ...

  17. 5 Hz Catalytic Emissions FT-IR Monitoring during Lean-Rich Engine...

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

    Hz Catalytic Emissions FT-IR Monitoring during Lean-Rich Engine Cycles: Comparison to Reference Methods 5 Hz Catalytic Emissions FT-IR Monitoring during Lean-Rich Engine Cycles:...

  18. THE ROLE OF FLY ASH IN CATALYTIC OXIDATION OF S(IV) SLURRIES

    E-Print Network [OSTI]

    Cohen, Sidney

    2014-01-01

    and Technology THE ROLE OF FLY ASH IN CATALYTIC OXIDATION OFof California. THE ROLE OF FLY ASH IN CATALYTIC OXIDATION OFg los~ S(IV) in aqueous fly ash slurries :n;- and 0 , and SO

  19. Formic Acid Free Flowsheet Development To Eliminate Catalytic Hydrogen Generation In The Defense Waste Processing

    SciTech Connect (OSTI)

    Lambert, Dan P.; Stone, Michael E.; Newell, J. David; Fellinger, Terri L.; Bricker, Jonathan M.

    2012-09-14

    The Defense Waste Processing Facility (DWPF) processes legacy nuclear waste generated at the Savannah River Site (SRS) during production of plutonium and tritium demanded by the Cold War. The nuclear waste is first treated via a complex sequence of controlled chemical reactions and then vitrified into a borosilicate glass form and poured into stainless steel canisters. Converting the nuclear waste into borosilicate glass canisters is a safe, effective way to reduce the volume of the waste and stabilize the radionuclides. Testing was initiated to determine whether the elimination of formic acid from the DWPF's chemical processing flowsheet would eliminate catalytic hydrogen generation. Historically, hydrogen is generated in chemical processing of alkaline High Level Waste sludge in DWPF. In current processing, sludge is combined with nitric and formic acid to neutralize the waste, reduce mercury and manganese, destroy nitrite, and modify (thin) the slurry rheology. The noble metal catalyzed formic acid decomposition produces hydrogen and carbon dioxide. Elimination of formic acid by replacement with glycolic acid has the potential to eliminate the production of catalytic hydrogen. Flowsheet testing was performed to develop the nitric-glycolic acid flowsheet as an alternative to the nitric-formic flowsheet currently being processed at the DWPF. This new flowsheet has shown that mercury can be reduced and removed by steam stripping in DWPF with no catalytic hydrogen generation. All processing objectives were also met, including greatly reducing the Slurry Mix Evaporator (SME) product yield stress as compared to the baseline nitric/formic flowsheet. Ten DWPF tests were performed with nonradioactive simulants designed to cover a broad compositional range. No hydrogen was generated in testing without formic acid.

  20. Agglutination of single catalyst particles during fluid catalytic cracking as observed by X-ray nanotomography

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

    Meirer, F.; Kalirai, S.; Weker, J. Nelson; Liu, Y.; Andrews, J. C.; Weckhuysen, B. M.

    2015-04-14

    Metal accumulation at the catalyst particle surface plays a role in particle agglutination during fluid catalytic cracking.

  1. Short Communication Catalytic coal gasification: use of calcium versus potassium*

    E-Print Network [OSTI]

    Short Communication Catalytic coal gasification: use of calcium versus potassium* Ljubisa R on the gasification in air and 3.1 kPa steam of North Dakota lignitic chars prepared under slow and rapid pyrolysis of calcium is related to its sintering via crystallite growth. (Keywords: coal; gasification; catalysis

  2. Ability of Catalytic Converters to Reduce Air Pollution

    E-Print Network [OSTI]

    Nizkorodov, Sergey

    NOx - 1 Ability of Catalytic Converters to Reduce Air Pollution MEASUREMENT OF SELECTED AIR Air Pollution MEASUREMENT OF SELECTED AIR POLLUTANTS IN CAR EXHAUST INTRODUCTION Automobile engines of gasoline (hydrocarbons, CxHy) in air: CxHy + O2 CO2 + H2O + heat (1) When there is the correct balance

  3. Catalytic Dehydrogenation of Propane in Hydrogen Permselective Membrane Reactors

    E-Print Network [OSTI]

    Brinker, C. Jeffrey

    Catalytic Dehydrogenation of Propane in Hydrogen Permselective Membrane Reactors John P. Collins and Production, Amoco Research Center, 150 West Warrenville Road, Naperville, Illinois 60566-7011 Propane operated at liquid hourly space velocities (LHSVs) similar to those used in commercial reactors for propane

  4. Catalytic Domain of Phosphoinositide-specific Phospholipase C (PLC)

    E-Print Network [OSTI]

    Williams, Roger L.

    Catalytic Domain of Phosphoinositide-specific Phospholipase C (PLC) MUTATIONAL ANALYSIS OF RESIDUES WITHIN THE ACTIVE SITE AND HYDROPHOBIC RIDGE OF PLC 1* (Received for publication, November 20, 1997 Institute, University of Dundee, Dundee DD1 4HN, United Kingdom Structural studies of phospholipase C 1 (PLC

  5. Catalytic Methane Reduction in the Exhaust Gas of Combustion Engines

    E-Print Network [OSTI]

    Dunin-Borkowski, Rafal E.

    Catalytic Methane Reduction in the Exhaust Gas of Combustion Engines Peter Mauermann1,* , Michael Dornseiffer6 , Frank Amkreutz6 1 Institute for Combustion Engines , RWTH Aachen University, Schinkelstr. 8, D of the hydrocarbon exhaust of internal combustion engines. In contrast to other gaseous hydrocarbons, significant

  6. ULTRA LOW NOx CATALYTIC COMBUSTION FOR IGCC POWER PLANTS

    SciTech Connect (OSTI)

    Lance L. Smith

    2004-03-01

    Tests were performed in PCI's sub-scale high-pressure (10 atm) test rig, using PCI's two-stage (catalytic / gas-phase) combustion process for syngas fuel. In this process, the first stage is a Rich-Catalytic Lean-burn (RCL{trademark}) catalytic reactor, wherein a fuel-rich mixture contacts the catalyst and reacts while final and excess combustion air cool the catalyst. The second stage is a gas-phase combustor, wherein the catalyst cooling air mixes with the catalytic reactor effluent to provide for final gas-phase burnout and dilution to fuel-lean combustion products. During the reporting period, PCI successfully achieved NOx = 0.011 lbs/MMBtu at 10 atm pressure (corresponding to 2.0 ppm NOx corrected to 15% O{sub 2} dry) with near-zero CO emissions, surpassing the project goal of < 0.03 lbs/MMBtu NOx. These emissions levels were achieved at scaled (10 atm, sub-scale) baseload conditions corresponding to Tampa Electric's Polk Power Station operation on 100% syngas (no co-firing of natural gas).

  7. Diffusiophoretic Self-Propulsion for Partially Catalytic Spherical Colloids

    E-Print Network [OSTI]

    Joost de Graaf; Georg Rempfer; Christian Holm

    2015-02-11

    Colloidal spheres with a partial platinum surface coating perform auto-phoretic motion when suspended in hydrogen peroxide solution. We present a theoretical analysis of the self-propulsion velocity of these particles using a continuum multi-component, self-diffusiophoretic model. With this model as a basis, we show how the slip-layer approximation can be derived and in which limits it holds. First, we consider the differences between the full multi-component model and the slip-layer approximation. Then the slip model is used to demonstrate and explore the sensitive nature of the particle's velocity on the details of the molecule-surface interaction. We find a strong asymmetry in the dependence of the colloid's velocity as a function of the level of catalytic coating, when there is a different interaction between the solute and solvent molecules and the inert and catalytic part of the colloid, respectively. The direction of motion can even be reversed by varying the level of the catalytic coating. Finally, we investigate the robustness of these results with respect to variations in the reaction rate near the edge between the catalytic and inert parts of the particle. Our results are of significant interest to the interpretation of experimental results on the motion of self-propelled particles.

  8. Catalytic two-stage coal hydrogenation and hydroconversion process

    DOE Patents [OSTI]

    MacArthur, James B. (Denville, NJ); McLean, Joseph B. (So. Somerville, NJ); Comolli, Alfred G. (Yardley, PA)

    1989-01-01

    A process for two-stage catalytic hydrogenation and liquefaction of coal to produce increased yields of low-boiling hydrocarbon liquid and gas products. In the process, the particulate coal is slurried with a process-derived liquid solvent and fed at temperature below about 650.degree. F. into a first stage catalytic reaction zone operated at conditions which promote controlled rate liquefaction of the coal, while simultaneously hydrogenating the hydrocarbon recycle oils at conditions favoring hydrogenation reactions. The first stage reactor is maintained at 650.degree.-800.degree. F. temperature, 1000-4000 psig hydrogen partial pressure, and 10-60 lb coal/hr/ft.sup.3 reactor space velocity. The partially hydrogenated material from the first stage reaction zone is passed directly to the close-coupled second stage catalytic reaction zone maintained at a temperature at least about 25.degree. F. higher than for the first stage reactor and within a range of 750.degree.-875.degree. F. temperature for further hydrogenation and thermal hydroconversion reactions. By this process, the coal feed is successively catalytically hydrogenated and hydroconverted at selected conditions, which results in significantly increased yields of desirable low-boiling hydrocarbon liquid products and minimal production of undesirable residuum and unconverted coal and hydrocarbon gases, with use of less energy to obtain the low molecular weight products, while catalyst life is substantially increased.

  9. Use of Simulation To Optimize NOx Abatement by Absorption and Selective Catalytic Reduction

    E-Print Network [OSTI]

    Liu, Y. A.

    Use of Simulation To Optimize NOx Abatement by Absorption and Selective Catalytic Reduction Andrew involving both absorption and selective catalytic reduction (SCR). The model helps identify operator The system under analysis involves two key pro- cesses: absorption and selective catalytic reduction (SCR

  10. Journal of Power Sources 142 (2005) 184193 Modeling and optimization of catalytic partial oxidation

    E-Print Network [OSTI]

    Daraio, Chiara

    2005-01-01

    of a micro-reformer for a fuel cell unit based on catalytic partial oxidation using a systematic numerical is around 80% is identified. © 2004 Elsevier B.V. All rights reserved. Keywords: Catalytic partial oxidationJournal of Power Sources 142 (2005) 184≠193 Modeling and optimization of catalytic partial

  11. Thiol-Dependent Recovery of Catalytic Activity from Oxidized Protein Tyrosine Phosphatases

    E-Print Network [OSTI]

    Gates, Kent. S.

    Thiol-Dependent Recovery of Catalytic Activity from Oxidized Protein Tyrosine Phosphatases Zachary PTPs via oxidation of the enzyme's catalytic cysteine thiolate group. Importantly, low- molecular. Here we examined the recovery of catalytic activity from two oxidatively inactivated PTPs (PTP1B

  12. Stochastic resonance in surface catalytic oxidation of carbon monoxide Lingfa Yang, Zhonghuai Hou, and Houwen Xina)

    E-Print Network [OSTI]

    Yang, Lingfa

    Stochastic resonance in surface catalytic oxidation of carbon monoxide Lingfa Yang, Zhonghuai Hou: catalytic oxidation on a single sur- face, by analysis of the behavior of a set of ordinary differ- ential help researchers to find SR in this system experimentally. II. REACTION MODEL The catalytic oxidation

  13. Catalytic activation and reforming of methane on supported palladium clusters Aritomo Yamaguchi, Enrique Iglesia *

    E-Print Network [OSTI]

    Iglesia, Enrique

    Catalytic activation and reforming of methane on supported palladium clusters Aritomo Yamaguchi and 13 C18 O, and 13 CO and 12 CO during CH4 reforming catalysis. This catalytic sequence, but do not contribute to steady-state catalytic reforming rates. The high reactivity of Pd surfaces in C

  14. Transformable topological mechanical metamaterials

    E-Print Network [OSTI]

    D. Zeb Rocklin; Shangnan Zhou; Kai Sun; Xiaoming Mao

    2015-10-21

    Mechanical metamaterials are engineered materials that gain their remarkable mechanical properties, such as negative Poisson's ratios, negative compressibility, phononic bandgaps, and topological phonon modes, from their structure rather than composition. Here we propose a new design principle, based on a uniform soft deformation of the whole structure, to allow metamaterials to be immediately and reversibly transformed between states with contrasting mechanical and acoustic properties. These properties are protected by the topological structure of the phonon band of the whole structure and are thus highly robust against disorder and noise. We discuss the general classification of all structures that exhibit such soft deformations, and provide specific examples to demonstrate how to utilize soft deformations to transform a system between different regimes such that remarkable changes in their properties, including edge stiffness and speed of sound, can be achieved.

  15. Liquid Metal Transformers

    E-Print Network [OSTI]

    Sheng, Lei; Liu, Jing

    2014-01-01

    The room temperature liquid metal is quickly emerging as an important functional material in a variety of areas like chip cooling, 3D printing or printed electronics etc. With diverse capabilities in electrical, thermal and flowing behaviors, such fluid owns many intriguing properties that had never been anticipated before. Here, we show a group of unconventional phenomena occurring on the liquid metal objects. Through applying electrical field on the liquid metals immersed in water, a series of complex transformation behaviors such as self-assembling of a sheet of liquid metal film into a single sphere, quick mergences of separate metal droplets, controlled self-rotation and planar locomotion of liquid metal objects can be realized. Meanwhile, it was also found that two accompanying water vortexes were induced and reliably swirled near the rotating liquid metal sphere. Further, effects of the shape, size, voltage, orientation and geometries of the electrodes to control the liquid metal transformers were clar...

  16. Industrial Gas Turbine Engine Catalytic Pilot Combustor-Prototype Testing

    SciTech Connect (OSTI)

    Shahrokh Etemad; Benjamin Baird; Sandeep Alavandi; William Pfefferle

    2009-09-30

    PCI has developed and demonstrated its Rich Catalytic Lean-burn (RCL¬ģ) technology for industrial and utility gas turbines to meet DOE‚??s goals of low single digit emissions. The technology offers stable combustion with extended turndown allowing ultra-low emissions without the cost of exhaust after-treatment and further increasing overall efficiency (avoidance of after-treatment losses). The objective of the work was to develop and demonstrate emission benefits of the catalytic technology to meet strict emissions regulations. Two different applications of the RCL¬ģ concept were demonstrated: RCL¬ģ catalytic pilot and Full RCL¬ģ. The RCL¬ģ catalytic pilot was designed to replace the existing pilot (a typical source of high NOx production) in the existing Dry Low NOx (DLN) injector, providing benefit of catalytic combustion while minimizing engine modification. This report discusses the development and single injector and engine testing of a set of T70 injectors equipped with RCL¬ģ pilots for natural gas applications. The overall (catalytic pilot plus main injector) program NOx target of less than 5 ppm (corrected to 15% oxygen) was achieved in the T70 engine for the complete set of conditions with engine CO emissions less than 10 ppm. Combustor acoustics were low (at or below 0.1 psi RMS) during testing. The RCL¬ģ catalytic pilot supported engine startup and shutdown process without major modification of existing engine controls. During high pressure testing, the catalytic pilot showed no incidence of flashback or autoignition while operating over a wide range of flame temperatures. In applications where lower NOx production is required (i.e. less than 3 ppm), in parallel, a Full RCL¬ģ combustor was developed that replaces the existing DLN injector providing potential for maximum emissions reduction. This concept was tested at industrial gas turbine conditions in a Solar Turbines, Incorporated high-pressure (17 atm.) combustion rig and in a modified Solar Turbines, Incorporated Saturn engine rig. High pressure single-injector rig and modified engine rig tests demonstrated NOx less than 2 ppm and CO less than 10 ppm over a wide flame temperature operating regime with low combustion noise (<0.15% peak-to-peak). Minimum NOx for the optimized engine retrofit Full RCL¬ģ designs was less than 1 ppm with CO emissions less than 10 ppm. Durability testing of the substrate and catalyst material was successfully demonstrated at pressure and temperature showing long term stable performance of the catalytic reactor element. Stable performance of the reactor element was achieved when subjected to durability tests (>5000 hours) at simulated engine conditions (P=15 atm, Tin=400C/750F.). Cyclic tests simulating engine trips was also demonstrated for catalyst reliability. In addition to catalyst tests, substrate oxidation testing was also performed for downselected substrate candidates for over 25,000 hours. At the end of the program, an RCL¬ģ catalytic pilot system has been developed and demonstrated to produce NOx emissions of less than 3 ppm (corrected to 15% O2) for 100% and 50% load operation in a production engine operating on natural gas. In addition, a Full RCL¬ģ combustor has been designed and demonstrated less than 2 ppm NOx (with potential to achieve 1 ppm) in single injector and modified engine testing. The catalyst/substrate combination has been shown to be stable up to 5500 hrs in simulated engine conditions.

  17. Two-stage Catalytic Reduction of NOx with Hydrocarbons

    SciTech Connect (OSTI)

    Umit S. Ozkan; Erik M. Holmgreen; Matthew M. Yung; Jonathan Halter; Joel Hiltner

    2005-12-21

    A two-stage system for the catalytic reduction of NO from lean-burn natural gas reciprocating engine exhaust is investigated. Each of the two stages uses a distinct catalyst. The first stage is oxidation of NO to NO{sub 2} and the second stage is reduction of NO{sub 2} to N{sub 2} with a hydrocarbon. The central idea is that since NO{sub 2} is a more easily reduced species than NO, it should be better able to compete with oxygen for the combustion reaction of hydrocarbon, which is a challenge in lean conditions. Early work focused on demonstrating that the N{sub 2} yield obtained when NO{sub 2} was reduced was greater than when NO was reduced. NO{sub 2} reduction catalysts were designed and silver supported on alumina (Ag/Al{sub 2}O{sub 3}) was found to be quite active, able to achieve 95% N{sub 2} yield in 10% O{sub 2} using propane as the reducing agent. The design of a catalyst for NO oxidation was also investigated, and a Co/TiO{sub 2} catalyst prepared by sol-gel was shown to have high activity for the reaction, able to reach equilibrium conversion of 80% at 300 C at GHSV of 50,000h{sup -1}. After it was shown that NO{sub 2} could be more easily reduced to N{sub 2} than NO, the focus shifted on developing a catalyst that could use methane as the reducing agent. The Ag/Al{sub 2}O{sub 3} catalyst was tested and found to be inactive for NOx reduction with methane. Through iterative catalyst design, a palladium-based catalyst on a sulfated-zirconia support (Pd/SZ) was synthesized and shown to be able to selectively reduce NO{sub 2} in lean conditions using methane. Development of catalysts for the oxidation reaction also continued and higher activity, as well as stability in 10% water, was observed on a Co/ZrO{sub 2} catalyst, which reached equilibrium conversion of 94% at 250 C at the same GHSV. The Co/ZrO{sub 2} catalyst was also found to be extremely active for oxidation of CO, ethane, and propane, which could potential eliminate the need for any separate oxidation catalyst. At every stage, catalyst synthesis was guided by the insights gained through detailed characterization of the catalysts using many surface and bulk analysis techniques such as X-ray diffraction, X-ray photoelectron spectroscopy, Temperature-programmed Reduction, Temperature programmed Desorption, and Diffuse Reflectance InfraRed Fourier Transform Spectroscopy as well as steady state reaction experiments. Once active catalysts for each stage had been developed, a physical mixture of the two catalysts was tested for the reduction of NO with methane in lean conditions. These experiments using a mixture of the catalysts produced N2 yields as high as 90%. In the presence of 10% water, the catalyst mixture produced 75% N{sub 2} yield, without any optimization. The dual catalyst system developed has the potential to be implemented in lean-burn natural gas engines for reducing NOx in lean exhaust as well as eliminating CO and unburned hydrocarbons without any fuel penalty or any system modifications. If funding continues, future work will focus on improving the hydrothermal stability of the system to bring the technology closer to application.

  18. FOURIER TRANSFORM MULTIPLE QUANTUM NMR

    E-Print Network [OSTI]

    Drobny, G.

    2011-01-01

    of transition observed in Fourier transform multiple quantumDecember 18-19, 1979 FOURIER TRANSFORM MULTIPLE QUANTUM NMRof London, December 1978. FOURIER TRANSFO~~ MULTIPLE QUANTUM

  19. Transformative Wave Technologies Kent, Washington

    E-Print Network [OSTI]

    California at Davis, University of

    Transformative Wave Technologies Kent, Washington www.transformativewave.com #12;#12;North America are shifted to off peak times #12;#12;Transformative Wave Technologies www.transformativewave.com #12

  20. Fourier Transform Infrared (FTIR) Spectroscopy

    E-Print Network [OSTI]

    Gerwert, Klaus

    Fourier Transform Infrared (FTIR) Spectroscopy Klaus Gerwert, Lehrstuhl fu®r Biophysik, Ruhr, Germany Based in part on the previous version of this Encyclopedia of Life Sciences (ELS) article, Fourier Transform IR by Johannes Orphal. Fourier transform infrared (FTIR) spectroscopy is an experimental technique

  1. LORENTZ TRANSFORMATIONS AND STATISTICAL MECHANICS

    E-Print Network [OSTI]

    of Lorentz transformations corresponding to radiation made its ap≠ pearance. We have yet to see a description of these ``radiation'' transformations in the Physics literature. The complexification of the Lorentz Transformations Mathematics Subject Classification. 57R45, 17B90, 15A63. Key words and phrases. exponential map, singularity

  2. LORENTZ TRANSFORMATIONS AND STATISTICAL MECHANICS

    E-Print Network [OSTI]

    transformations corresponding to radiation made its ap- pearance. We have yet to see a description of these "radiation" transformations in the Physics literature. The complexification of the Lorentz Transformations Mathematics Subject Classification. 57R45, 17B90, 15A63. Key words and phrases. exponential map, singularity

  3. Unanticipated Effects of Epoxy Impregnating Transformers

    SciTech Connect (OSTI)

    SANCHEZ,ROBERT O.; ARCHER,WENDEL E.

    2000-08-23

    Many Sandia components for military applications are designed for a 20-year life. In order to determine if magnetic components meet that requirement, the parts are subjected to selected destructive tests. This paper reviews the re-design of a power transformer and the tests required to prove-in the re-design. The re-design included replacing the Epon 828/Mica/methylenedianiline (curing agent Z) epoxy encapsulant with a recent Sandia National Laboratory (SNL) developed epoxy encapsulant. The new encapsulant reduces the Environmental Safety and Health (ES and H) hazards. Life testing of this re-designed transformer generated failures; an open secondary winding. An experimental program to determine the cause of the broken wires and an improved design to eliminate the problem was executed. This design weakness was corrected by reverting to the hazardous epoxy system.

  4. Optimal Choice for Number of Strands in a Litz-Wire Transformer Winding

    E-Print Network [OSTI]

    Optimal Choice for Number of Strands in a Litz-Wire Transformer Winding C. R. Sullivan Found Choice for Number of Strands in a Litz-Wire Transformer Winding Charles R. Sullivan Thayer School/inductor Abstract -- The number of strands to minimize loss in a litz-wire transformer winding is determined

  5. Method for recovering catalytic elements from fuel cell membrane electrode assemblies

    DOE Patents [OSTI]

    Shore, Lawrence (Edison, NJ); Matlin, Ramail (Berkeley Heights, NJ); Heinz, Robert (Ludwigshafen, DE)

    2012-06-26

    A method for recovering catalytic elements from a fuel cell membrane electrode assembly is provided. The method includes converting the membrane electrode assembly into a particulate material, wetting the particulate material, forming a slurry comprising the wetted particulate material and an acid leachate adapted to dissolve at least one of the catalytic elements into a soluble catalytic element salt, separating the slurry into a depleted particulate material and a supernatant containing the catalytic element salt, and washing the depleted particulate material to remove any catalytic element salt retained within pores in the depleted particulate material.

  6. Renormalization Group Transformation for the Wave Function

    E-Print Network [OSTI]

    Hanae El Hattab; Janos Polonyi

    1998-03-26

    The problem considered here is the determination of the hamiltonian of a first quantized nonrelativistic particle by the help of some measurements of the location with a finite resolution. The resulting hamiltonian depends on the resolution of the measuring device. This dependence is reproduced by the help of a blocking transformation on the wave function. The systems with quadratic hamiltonian are studied in details. The representation of the renormalization group in the space of observables is identified.

  7. The Industrial Transformation of Subarctic Canada

    E-Print Network [OSTI]

    Mathoor, Vineeth

    2011-01-01

    the pace and impact of industrial transformation in theReview: The Industrial Transformation of Subarctic Canada ByIndia Piper, Liza. The Industrial Transformation of

  8. Preconversion catalytic deoxygenation of phenolic functional groups. Quarterly technical progress report, April 1, 1992--June 30, 1992

    SciTech Connect (OSTI)

    Kubiak, C.P.

    1992-11-01

    Aryl carbon-oxygen bond cleavage is a chemical transformation of importance in coal liquefaction and the upgrading of coal liquids as well as in the synthesis of natural products. There have been numerous attempts to discover general methods for the cleavage of aryl carbon-oxygen bonds. All the stoichiometric organic methods for phenol deoxygenation have limited applications and involve expensive reagents. Catalytic method, for the hydrodeoxygenation (HDO) of phenols involve supported transition metal oxides, such as Mo/{gamma}-Al{sub 2}O{sub 3}, Ni-MO/{gamma}-Al{sub 2}O{sub 3}, Co-Mo/{gamma}-Al{sub 2}O{sub 3}, and Fe{sub 2}O{sub 3}/SiO{sub 2}. Typical phenol hydrodeoxygenation conditions involve hydrogen pressures in excess of 100 atm and temperatures in excess of 200{degrees}C. Under these conditions arene ring hydrogenation is generally found to compete with phenol deoxygenation; and the coproduct water is found to impair the activity of the catalysts. This proposed research offers the possibility of effecting the selective catalytic deoxygenation of phenolic functional groups using CO. The deoxygenation of phenols by carbon monoxide mediated by Ir(triphos)OAr has provided us with a catalytic Phenol deoxygenation pathway, through the elimination of CO{sub 2} and formation of a benzyne intermediate. Although the [Pt(triphos)(O-Ph-Me)]PF{sub 6} system is not expected to be as efficient a catalyst as some of the other transition metals systems we are currently exploring, it will provide more information about the deoxygenation mechanism in these triphos complexes. This is due to the presence of the structurally sensitive {sup 3l}P--{sup 195}Pt coupling constant and comparisons to the extensively studied Pt(dppe)(O-Ph){sub 2} systems.

  9. Catalytic Porous Ceramic Prepared In-Situ by Sol-Gelation for Butane-to-Syngas Processing

    E-Print Network [OSTI]

    Daraio, Chiara

    Catalytic Porous Ceramic Prepared In-Situ by Sol-Gelation for Butane-to-Syngas Processing≠1859, 2009 Keywords: catalytic porous ceramic, butane-to-syngas processing, catalytic foam, sol-gelation, Rh containing cat- alytic Rh/ceria/zirconia nanoparticles is tested by its catalytic performance for butane

  10. Catalytic Upgrading of Sugars to Hydrocarbons Technology Pathway

    SciTech Connect (OSTI)

    Biddy, Mary J.; Jones, Susanne B.

    2013-03-31

    In support of the Bioenergy Technologies Office, the National Renewable Energy Laboratory (NREL) and the Pacific Northwest National Laboratory (PNNL) are undertaking studies of biomass conversion technologies to hydrocarbon fuels to identify barriers and target research toward reducing conversion costs. Process designs and preliminary economic estimates for each of these pathway cases were developed using rigorous modeling tools (Aspen Plus and Chemcad). These analyses incorporated the best information available at the time of development, including data from recent pilot and bench-scale demonstrations, collaborative industrial and academic partners, and published literature and patents. This technology pathway case investigates the catalytic conversion of solubilized carbohydrate streams to hydrocarbon biofuels, utilizing data from recent efforts within the National Advanced Biofuels Consortium (NABC) in collaboration with Virent, Inc.. Technical barriers and key research needs that should be pursued for the catalytic conversion of sugars pathway to be competitive with petroleum-derived gasoline, diesel and jet range hydrocarbon blendstocks have been identified.

  11. Selective dehydrogenation of propane over novel catalytic materials

    SciTech Connect (OSTI)

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

    1998-02-01

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

  12. Catalytic effects of minerals on NOx emission from coal combustion

    SciTech Connect (OSTI)

    Yao, M.Y.; Che, D.F.

    2007-07-01

    The catalytic effects of inherent mineral matters on NOx emissions from coal combustion have been investigated by a thermo-gravimetric analyzer (TGA) equipped with a gas analyzer. The effect of demineralization and the individual effect of Na, K, Ca, Mg, and Fe on the formation of NOx are studied as well as the combined catalytic effects of Ca + Na and Ca + Ti. Demineralization causes more Fuel-N to retain in the char, and reduction of NOx mostly. But the mechanistic effect on NOx formation varies from coal to coal. Ca and Mg promote NOx emission. Na, K, Fe suppress NOx formation to different extents. The effect of transition element Fe is the most obvious. The combination of Ca + Na and Ca + Ti can realize the simultaneous control of sulfur dioxide and nitrogen oxides emissions.

  13. Size Effect of Ruthenium Nanoparticles in Catalytic Carbon Monoxide Oxidation

    SciTech Connect (OSTI)

    Joo, Sang Hoon; Park, Jeong Y.; Renzas, J. Russell; Butcher, Derek R.; Huang, Wenyu; Somorjai, Gabor A.

    2010-04-04

    Carbon monoxide oxidation over ruthenium catalysts has shown an unusual catalytic behavior. Here we report a particle size effect on CO oxidation over Ru nanoparticle (NP) catalysts. Uniform Ru NPs with a tunable particle size from 2 to 6 nm were synthesized by a polyol reduction of Ru(acac){sub 3} precursor in the presence of poly(vinylpyrrolidone) stabilizer. The measurement of catalytic activity of CO oxidation over two-dimensional Ru NPs arrays under oxidizing reaction conditions (40 Torr CO and 100 Torr O{sub 2}) showed an activity dependence on the Ru NP size. The CO oxidation activity increases with NP size, and the 6 nm Ru NP catalyst shows 8-fold higher activity than the 2 nm catalysts. The results gained from this study will provide the scientific basis for future design of Ru-based oxidation catalysts.

  14. Catalytic destruction of groundwater contaminants in reactive extraction wells

    DOE Patents [OSTI]

    McNab, Jr., Walt W. (Concord, CA); Reinhard, Martin (Stanford, CA)

    2002-01-01

    A system for remediating groundwater contaminated with halogenated solvents, certain metals and other inorganic species based on catalytic reduction reactions within reactive well bores. The groundwater treatment uses dissolved hydrogen as a reducing agent in the presence of a metal catalyst, such a palladium, to reduce halogenated solvents (as well as other substituted organic compounds) to harmless species (e.g., ethane or methane) and immobilize certain metals to low valence states. The reactive wells function by removing water from a contaminated water-bearing zone, treating contaminants with a well bore using catalytic reduction, and then reinjecting the treated effluent into an adjacent water-bearing zone. This system offers the advantages of a compact design with a minimal surface footprint (surface facilities) and the destruction of a broad suite of contaminants without generating secondary waste streams.

  15. Catalytic membrane reactors for chemicals upgrading and environmental control

    SciTech Connect (OSTI)

    Sammells, A.F. [Eltron Research, Inc., Boulder, CO (United States)

    1994-12-31

    Mixed ionic and electronic conducting catalytic membrane reactors are being developed for promoting a number of spontaneous chemical reactions either leading to synthesis of value added products or decomposition of environmental contaminants. The dense non-porous ceramic materials behave as short-circuited electrochemical devices whereby ions (oxygen anions or protons) and electrons become simultaneously mediated for one reaction surface to another. The rationale behind membrane materials selection and specific applications will be discussed.

  16. Catalytic Combustion for Ultra-Low NOx Hydrogen Turbines

    SciTech Connect (OSTI)

    Etemad, Shahrokh; Baird, Benjamin; Alavandi, Sandeep

    2011-06-30

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

  17. Hybrid lean premixing catalytic combustion system for gas turbines

    DOE Patents [OSTI]

    Critchley, Ian L.

    2003-12-09

    A system and method of combusting a hydrocarbon fuel is disclosed. The system combines the accuracy and controllability of an air staging system with the ultra-low emissions achieved by catalytic combustion systems without the need for a pre-heater. The result is a system and method that is mechanically simple and offers ultra-low emissions over a wide range of power levels, fuel properties and ambient operating conditions.

  18. Catalytic cracking receives heavy attention at Q and A meeting

    SciTech Connect (OSTI)

    Not Available

    1993-04-19

    Refiners discussed fluid catalytic cracking (FCC) - the workhorse of the modern refinery - in great detail at the most recent National Petroleum Refiners Association's annual question and answer session on refining and petrochemical technology. Among the topics covered were the newest FCC refractory lining and particulate-control methods. The panel of experts also answered questions on the role of FCC in reducing gasoline benzene to meet reformulated gasoline specifications. This paper discusses refractories; particulate control; gasoline feeds; and benzene reduction.

  19. LU transformation invariant operators and LU transformation invariant

    E-Print Network [OSTI]

    Xin-wei Zha; Chun-min Zhang

    2007-02-06

    We proposed a concept of LU transformation invariant operators. By using this operator, arbitrary multi-qubit states LU transformation invariant and SLOCC invariant could be easily obtained. And we find that presences two kinds of invariant operators and corresponding invariants. One kind of operators yields LU invariants and the other operators results in SLOCC invariants. For three-qubit states, all independence LU transformation invariant are obtained. Furthermore, by this system method, arbitrary multi-qubit states invariants can be given.

  20. Liquid chromatographic determination of water

    DOE Patents [OSTI]

    Fortier, N.E.; Fritz, J.S.

    1990-11-13

    A sensitive method for the determination of water in the presence of common interferences is presented. The detection system is based on the effect of water on the equilibrium which results from the reaction aryl aldehydes, such as cinnamaldehyde and methanol in the eluent to form cinnamaldehyde dimethylacetal, plus water. This equilibrium is shifted in a catalytic atmosphere of a hydrogen ion form past column reactor. The extent of the shift and the resulting change in absorbance are proportional to the amount of water present. 1 fig.

  1. New Catalytic DNA Biosensors for Radionuclides and Metal ions

    SciTech Connect (OSTI)

    Lu, Yi

    2003-06-01

    The goals of the project are to develop new catalytic DNA biosensors for simultaneous detection and quantification of bioavailable radionuclides and metal ions, and apply the sensors for on-site, real-time assessment of concentration, speciation and stability of the individual contaminants during and after bioremediation. A negative selection strategy was tested and validated. In vitro selection was shown to yield highly active and specific transition metal ion-dependent catalytic DNA/RNA. A fluorescence resonance energy transfer (FRET) study of in vitro selected DNA demonstrated that the trifluorophore labeled system is a simple and powerful tool in studying complex biomolecules structure and dynamics, and is capable of revealing new sophisticated structural changes. New fluorophore/quenchers in a single fluorosensor yielded improved signal to noise ratio in detection, identification and quantification of metal contaminants. Catalytic DNA fluorescent and colorimetric sensors were shown useful in sensing lead in lake water and in leaded paint. Project results were described in two papers and two patents, and won an international prize.

  2. New Catalytic DNA Biosensors for Radionuclides and Metal ions

    SciTech Connect (OSTI)

    Lu, Yi

    2002-06-01

    The goals of the project are to develop new catalytic DNA biosensors for simultaneous detection and quantification of bioavailable radionuclides and metal ions, and apply the sensors for on-site, real-time assessment of concentration, speciation and stability of the individual contaminants during and after bioremediation. A negative selection strategy was tested and validated. In vitro selection was shown to yield highly active and specific transition metal ion-dependent catalytic DNA/RNA. A fluorescence resonance energy transfer (FRET) study of in vitro selected DNA demonstrated that the trifluorophore labeled system is a simple and powerful tool in studying complex biomolecules structure and dynamics, and is capable of revealing new sophisticated structural changes. New fluorophore/quenchers in a single fluorosensor yielded improved signal to noise ratio in detection, identification and quantification of metal contaminants. Catalytic DNA fluorescent and colorimetric sensors were shown useful in sensing lead in lake water and in leaded paint. Project results were described in two papers and two patents, and won an international prize.

  3. Dedicated Beamline Facilities for Catalytic Research. Synchrotron Catalysis Consortium (SCC)

    SciTech Connect (OSTI)

    Chen, Jingguang; Frenkel, Anatoly; Rodriguez, Jose; Adzic, Radoslav; Bare, Simon R.; Hulbert, Steve L.; Karim, Ayman; Mullins, David R.; Overbury, Steve

    2015-03-04

    Synchrotron spectroscopies offer unique advantages over conventional techniques, including higher detection sensitivity and molecular specificity, faster detection rate, and more in-depth information regarding the structural, electronic and catalytic properties under in-situ reaction conditions. Despite these advantages, synchrotron techniques are often underutilized or unexplored by the catalysis community due to various perceived and real barriers, which will be addressed in the current proposal. Since its establishment in 2005, the Synchrotron Catalysis Consortium (SCC) has coordinated significant efforts to promote the utilization of cutting-edge catalytic research under in-situ conditions. The purpose of the current renewal proposal is aimed to provide assistance, and to develop new sciences/techniques, for the catalysis community through the following concerted efforts: Coordinating the implementation of a suite of beamlines for catalysis studies at the new NSLS-II synchrotron source; Providing assistance and coordination for catalysis users at an SSRL catalysis beamline during the initial period of NSLS to NSLS II transition; Designing in-situ reactors for a variety of catalytic and electrocatalytic studies; Assisting experimental set-up and data analysis by a dedicated research scientist; Offering training courses and help sessions by the PIs and co-PIs.

  4. Fourier transform and related integral transforms in superspace

    E-Print Network [OSTI]

    Hendrik De Bie

    2008-05-13

    In this paper extensions of the classical Fourier, fractional Fourier and Radon transforms to superspace are studied. Previously, a Fourier transform in superspace was already studied, but with a different kernel. In this work, the fermionic part of the Fourier kernel has a natural symplectic structure, derived using a Clifford analysis approach. Several basic properties of these three transforms are studied. Using suitable generalizations of the Hermite polynomials to superspace (see [H. De Bie, F. Sommen, Hermite and Gegenbauer polynomials in superspace using Clifford analysis, J. Phys. A 40 (2007) 10441-10456]) an eigenfunction basis for the Fourier transform is constructed.

  5. Contamination of the transformer oil of power transformers and shunting reactors by metal-containing colloidal particles

    SciTech Connect (OSTI)

    L'vov, S. Yu. [LLC 'Presselektro' (Russian Federation); Komarov, V. B.; Bondareva, V. N.; Seliverstov, A. F. [A. N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences (IFCE of RAS) (Russian Federation); Lyut'ko, E. O.; L'vov, Yu. N. [JSC 'R and D Centre for Power Engineering' (Russian Federation); Ershov, B. G. [A. N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences (IFCE of RAS) (Russian Federation)

    2011-05-15

    The results of a measurement of the contamination of the oil in 66 transformers by metal-containing colloidal particles, formed as a result of the interaction of the oil with the structural materials (the copper of the windings, the iron of the tank and core etc.), and also the results of measurements of the optical turbidity of the oil in 136 transformers when they were examined at the Power Engineering Research and Development Center Company are presented. Methods of determining the concentration of copper and iron in transformer oil are considered. The limiting values of the optical turbidity factors, the copper and iron content are determined. These can serve as a basis for taking decisions on whether to replace the silica gel of the filters for continuously purifying the oil of power transformers and the shunting reactors in addition to the standardized oil contamination factors, namely, the dielectric loss tangent and the acidity number of the oil.

  6. Flame-synthesis limits and self-catalytic behavior of carbon nanotubes using a double-faced wall stagnation flow burner

    SciTech Connect (OSTI)

    Woo, S.K.; Hong, Y.T.; Kwon, O.C.

    2009-10-15

    Flame-synthesis limits of carbon nanotubes (CNTs) are measured using a double-faced wall stagnation flow (DWSF) burner that shows potential in mass production of CNTs. With nitrogen-diluted premixed ethylene-air flames established on the nickel-coated stainless steel double-faced plate wall, the limits of CNT formation are determined using field-emission scanning and transmission electron microscopies and Raman spectroscopy. Also, self-catalytic behavior of the synthesized CNTs is evaluated using the DWSF burner with a CNT-deposited stainless steel double-faced plate wall. Results show narrow fuel-equivalence ratio limits of multi-walled CNT (MWCNT)-synthesis at high flame stretch rates and substantially extended limits at low flame stretch rates. This implies that the synthesis limits are very sensitive to the fuel-equivalence ratio variation for the high stretch rate conditions, yielding a lot of impurities and soot rather than MWCNTs. The enhanced ratio of tube inner diameter to wall thickness of the MWCNTs synthesized using a CNT self-catalytic flame-synthesis process is observed, indicating that the quality of metal-catalytic, flame-synthesized MWCNTs can be much improved via the process. Thus, using a DWSF burner with the CNT self-catalytic process has potential in mass production of MWCNTs with improved quality. (author)

  7. Monitoring Uranium Transformations Determined by the Evolution of Biogeochemical Processes

    SciTech Connect (OSTI)

    Marsh, Terence L.

    2013-07-30

    Our contribution to the larger project (ANL) was the phylogenetic analysis of evolved communities capable of reducing metals including uranium.

  8. FOR A WORLD Driven by the determination to transform our

    E-Print Network [OSTI]

    Matrajt, Graciela

    of a new 130,000-square-foot building to create expansion space for the highly successful UW Computer, to working on breakthroughs in clean energy and environmental sustainability. With campuses in Seattle. 2: RAPIDLY INCREASE HEALTH CARE ACCESS FOR ALL WASHINGTONIANS The UW requests $4 million per year

  9. LORENTZ TRANSFORMATIONS AND STATISTICAL MECHANICS

    E-Print Network [OSTI]

    class of Lorentz transformations corresponding to radiation made its * *ap- pearance. We have yet to see a description of these "radiation" transformations* * in the Physics literature, 15A63. Key words and phrases. exponential map, singularity, electro-magnetism, ener* *gy

  10. Solid state oxygen anion and electron mediating membrane and catalytic membrane reactors containing them

    SciTech Connect (OSTI)

    Schwartz, Michael (Boulder, CO); White, James H. (Boulder, CO); Sammells, Anthony F. (Boulder, CO)

    2001-01-01

    A process for production of synthesis gas employing a catalytic membrane reactor wherein the membrane comprises a mixed metal oxide material.

  11. Measurement of diesel solid nanoparticle emissions using a catalytic stripper for comparison with Europe's PMP protocol

    Broader source: Energy.gov [DOE]

    Evaluation and comparison of the measurements of diesel solid nanoparticle emissions using the European Particle Measurement Programme (PMP) system and catalytic stripper

  12. A Simple Approach of Tuning Catalytic Activity of MFI-Zeolites...

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

    & Publications Catalysts via First Principles (Agreement ID:10635) Catalysts via First Principles Bifunctional Catalysts for the Selective Catalytic Reduction of NO by Hydrocarbons...

  13. Catalytic pyrolysis of plastic wastes - Towards an economically viable process

    SciTech Connect (OSTI)

    McIntosh, M.J.; Arzoumanidis, G.G.; Brockmeier, F.E.

    1996-07-01

    The ultimate goal of our project is an economically viable pyrolysis process to recover useful fuels and/or chemicals from plastics- containing wastes. This paper reports the effects of various promoted and unpromoted binary oxide catalysts on yields and compositions of liquid organic products, as measured in a small laboratory pyrolysis reactor. On the basis of these results, a commercial scale catalytic pyrolysis reactor was simulated by the Aspen software and rough costs were estimated. The results suggest that such a process has potential economic viability.

  14. Fabrication of catalytic electrodes for molten carbonate fuel cells

    DOE Patents [OSTI]

    Smith, James L. (Lemont, IL)

    1988-01-01

    A porous layer of catalyst material suitable for use as an electrode in a molten carbonate fuel cell includes elongated pores substantially extending across the layer thickness. The catalyst layer is prepared by depositing particulate catalyst material into polymeric flocking on a substrate surface by a procedure such as tape casting. The loaded substrate is heated in a series of steps with rising temperatures to set the tape, thermally decompose the substrate with flocking and sinter bond the catalyst particles into a porous catalytic layer with elongated pores across its thickness. Employed as an electrode, the elongated pores provide distribution of reactant gas into contact with catalyst particles wetted by molten electrolyte.

  15. Method for low temperature catalytic production of hydrogen

    DOE Patents [OSTI]

    Mahajan, Devinder

    2003-07-22

    The invention provides a process for the catalytic production of a hydrogen feed by exposing a hydrogen feed to a catalyst which promotes a base-catalyzed water-gas-shift reaction in a liquid phase. The hydrogen feed can be provided by any process known in the art of making hydrogen gas. It is preferably provided by a process that can produce a hydrogen feed for use in proton exchange membrane fuel cells. The step of exposing the hydrogen feed takes place preferably from about 80.degree. C. to about 150.degree. C.

  16. Method and apparatus for decoupled thermo-catalytic pollution control

    DOE Patents [OSTI]

    Tabatabaie-Raissi, Ali; Muradov, Nazim Z.; Martin, Eric

    2006-07-11

    A new method for design and scale-up of thermocatalytic processes is disclosed. The method is based on optimizing process energetics by decoupling of the process energetics from the DRE for target contaminants. The technique is applicable to high temperature thermocatalytic reactor design and scale-up. The method is based on the implementation of polymeric and other low-pressure drop support for thermocatalytic media as well as the multifunctional catalytic media in conjunction with a novel rotating fluidized particle bed reactor.

  17. Plasma-assisted catalytic ionization using porous nickel plate

    SciTech Connect (OSTI)

    Oohara, W.; Maeda, T.; Higuchi, T.

    2011-09-15

    Hydrogen atomic pair ions, i.e., H{sup +} and H{sup -} ions, are produced by plasma-assisted catalytic ionization using a porous nickel plate. Positive ions in a hydrogen plasma generated by dc arc discharge are irradiated to the porous plate, and pair ions are produced from the back of the irradiation plane. It becomes clear that the production quantity of pair ions mainly depends on the irradiation current of positive ions and the irradiation energy affects the production efficiency of H{sup -} ions.

  18. Recent Advances in Catalytic Conversion of Ethanol to Chemicals

    SciTech Connect (OSTI)

    Sun, Junming; Wang, Yong

    2014-04-30

    With increased availability and decreased cost, ethanol is potentially a promising platform molecule for the production of a variety of value-added chemicals. In this review, we provide a detailed summary of recent advances in catalytic conversion of ethanol to a wide range of chemicals and fuels. We particularly focus on catalyst advances and fundamental understanding of reaction mechanisms involved in ethanol steam reforming (ESR) to produce hydrogen, ethanol conversion to hydrocarbons ranging from light olefins to longer chain alkenes/alkanes and aromatics, and ethanol conversion to other oxygenates including 1-butanol, acetaldehyde, acetone, diethyl ether, and ethyl acetate.

  19. The backflow cell model for fluidized bed catalytic reactors†

    E-Print Network [OSTI]

    Ganapathy, E. V

    1967-01-01

    that the backmixing of gas in a small fluidized bed with high length to diameter rati. o is relatively small. Hence, it was recommended. that reaction rate studies in fluidized bed reactors be correlated on the basis oi' piston flow~ neglecting mixing. Nay (19... Major Subject Chemical En ineerin THE BACKFLOW CELL MODEL FOR FLUIDIZED BED CATALYTIC REACTORS A Thesis E. V. Ganapathy Approved as to style and content by: chairman of Committee ~H+d d D p t t Member Member) May 1967 SO THE BACKFLOW CELL...

  20. Catalytic Self-Decontaminating Materials - Energy Innovation Portal

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B LReports fromSheetsCascadia AnalysisCatalysisChemicalsCatalytic

  1. Transformer Efficiency Assessment - Okinawa, Japan

    SciTech Connect (OSTI)

    Thomas L. Baldwin; Robert J. Turk; Kurt S. Myers; Jake P. Gentle; Jason W. Bush

    2012-05-01

    The US Army Engineering & Support Center, Huntsville (USAESCH), and the US Marine Corps Base (MCB), Okinawa, Japan retained Idaho National Laboratory (INL) to conduct a Transformer Efficiency Assessment of ďkeyĒ transformers located at multiple military bases in Okinawa, Japan. The purpose of this assessment is to support the Marine Corps Base, Okinawa in evaluating medium voltage distribution transformers for potential efficiency upgrades. The original scope of work included the MCB providing actual transformer nameplate data, manufacturerís factory test sheets, electrical system data (kWh), demand data (kWd), power factor data, and electricity cost data. Unfortunately, the MCBís actual data is not available and therefore making it necessary to de-scope the original assessment. Note: Any similar nameplate data, photos of similar transformer nameplates, and basic electrical details from one-line drawings (provided by MCB) are not a replacement for actual load loss test data. It is recommended that load measurements are performed on the high and low sides of transformers to better quantify actual load losses, demand data, and power factor data. We also recommend that actual data, when available, be inserted by MCB Okinawa where assumptions have been made and then the LCC analysis updated. This report covers a generalized assessment of modern U.S. transformers in a three level efficiency category, Low-Level efficiency, Medium-Level efficiency, and High-Level efficiency.

  2. Transformer Efficiency Assessment - Okinawa, Japan

    SciTech Connect (OSTI)

    Thomas L. Baldwin; Robert J. Turk; Kurt S. Myers; Jake P. Gentle; Jason W. Bush

    2012-08-01

    The US Army Engineering & Support Center, Huntsville (USAESCH), and the US Marine Corps Base (MCB), Okinawa, Japan retained Idaho National Laboratory (INL) to conduct a Transformer Efficiency Assessment of ďkeyĒ transformers located at multiple military bases in Okinawa, Japan. The purpose of this assessment is to support the Marine Corps Base, Okinawa in evaluating medium voltage distribution transformers for potential efficiency upgrades. The original scope of work included the MCB providing actual transformer nameplate data, manufacturerís factory test sheets, electrical system data (kWh), demand data (kWd), power factor data, and electricity cost data. Unfortunately, the MCBís actual data is not available and therefore making it necessary to de-scope the original assessment. Note: Any similar nameplate data, photos of similar transformer nameplates, and basic electrical details from one-line drawings (provided by MCB) are not a replacement for actual load loss test data. It is recommended that load measurements are performed on the high and low sides of transformers to better quantify actual load losses, demand data, and power factor data. We also recommend that actual data, when available, be inserted by MCB Okinawa where assumptions have been made and then the LCC analysis updated. This report covers a generalized assessment of modern U.S. transformers in a three level efficiency category, Low-Level efficiency, Medium-Level efficiency, and High-Level efficiency.

  3. Development of new catalytic transformations and reagents for the construction of C-N and C-S bonds

    E-Print Network [OSTI]

    Vinogradova, Ekaterina V. (Ekaterina Viktorovna)

    2015-01-01

    Chapter 1. Palladium-Catalyzed Cross-Coupling of Aryl Chlorides and Triflates with Sodium Cyanate: A Practical Synthesis of Unsymmetrical Ureas. An efficient method for palladium-catalyzed cross-coupling of aryl chlorides ...

  4. HYBRID SELECTIVE NON-CATALYTIC REDUCTION (SNCR)/SELECTIVE CATALYTIC REDUCTION (SCR) DEMONSTRATION FOR THE REMOVAL OF NOx FROM BOILER FLUE GASES

    SciTech Connect (OSTI)

    Jerry B. Urbas

    1999-05-01

    The U. S. Department of Energy (DOE), Electric Power Research Institute (EPRI), Pennsylvania Electric Energy Research Council, (PEERC), New York State Electric and Gas and GPU Generation, Inc. jointly funded a demonstration to determine the capabilities for Hybrid SNCR/SCR (Selective Non-Catalytic Reduction/Selective Catalytic Reduction) technology. The demonstration site was GPU Generation's Seward Unit No.5 (147MW) located in Seward Pennsylvania. The demonstration began in October of 1997 and ended in December 1998. DOE funding was provided through Grant No. DE-FG22-96PC96256 with T. J. Feeley as the Project Manager. EPRI funding was provided through agreements TC4599-001-26999 and TC4599-002-26999 with E. Hughes as the Project Manager. This project demonstrated the operation of the Hybrid SNCR/SCR NO{sub x} control process on a full-scale coal fired utility boiler. The hybrid technology was expected to provide a cost-effective method of reducing NO{sub x} while balancing capital and operation costs. An existing urea based SNCR system was modified with an expanded-duct catalyst to provide increased NO{sub x} reduction efficiency from the SNCR while producing increased ammonia slip levels to the catalyst. The catalyst was sized to reduce the ammonia slip to the air heaters to less than 2 ppm while providing equivalent NO{sub x} reductions. The project goals were to demonstrate hybrid technology is capable of achieving at least a 55% reduction in NO{sub x} emissions while maintaining less than 2ppm ammonia slip to the air heaters, maintain flyash marketability, verify the cost benefit and applicability of Hybrid post combustion technology, and reduce forced outages due to ammonium bisulfate (ABS) fouling of the air heaters. Early system limitations, due to gas temperature stratification, restricted the Hybrid NO{sub x} reduction capabilities to 48% with an ammonia slip of 6.1 mg/Nm{sup 3} (8 ppm) at the catalyst inlet. After resolving the stratification problem, the catalyst did not have sufficient activity in order to continue the planned test program. Arsenic poisoning was found to be the cause of premature catalyst deactivation.

  5. Catalytic combustor for integrated gasification combined cycle power plant

    DOE Patents [OSTI]

    Bachovchin, Dennis M. (Mauldin, SC); Lippert, Thomas E. (Murrysville, PA)

    2008-12-16

    A gasification power plant 10 includes a compressor 32 producing a compressed air flow 36, an air separation unit 22 producing a nitrogen flow 44, a gasifier 14 producing a primary fuel flow 28 and a secondary fuel source 60 providing a secondary fuel flow 62 The plant also includes a catalytic combustor 12 combining the nitrogen flow and a combustor portion 38 of the compressed air flow to form a diluted air flow 39 and combining at least one of the primary fuel flow and secondary fuel flow and a mixer portion 78 of the diluted air flow to produce a combustible mixture 80. A catalytic element 64 of the combustor 12 separately receives the combustible mixture and a backside cooling portion 84 of the diluted air flow and allows the mixture and the heated flow to produce a hot combustion gas 46 provided to a turbine 48. When fueled with the secondary fuel flow, nitrogen is not combined with the combustor portion.

  6. Transforms for the Motion Compensation Residual

    E-Print Network [OSTI]

    Kamisli, Fatih

    The Discrete-Cosine-Transform (DCT) is the most widely used transform in image and video compression. Its use in image compression is often justified by the notion that it is the statistically optimal transform for first-order ...

  7. Transformations of Conditional Rewrite Systems (Extended Abstract)

    E-Print Network [OSTI]

    Gramlich, Bernhard

    Transformations of Conditional Rewrite Systems Revisited (Extended Abstract) Karl Gmeiner and Bernhard Gramlich TU Wien, Austria, {gmeiner,gramlich}@logic.at We revisit known transformations for describing and classifying such transformations, discuss the major problems arising, pro- vide simplified

  8. National Symposium on Market Transformation

    Broader source: Energy.gov [DOE]

    Hosted by the American Council for an Energy-Efficient Economy (ACEEE) and the Consortium for Energy Efficiency (CEE), this three-day conference features speakers covering topics within the scope of market transformation.

  9. ENERGY TRANSFORMED: SUSTAINABLE ENERGY SOLUTIONS

    E-Print Network [OSTI]

    Roe, Paul

    ENERGY TRANSFORMED: SUSTAINABLE ENERGY SOLUTIONS AUSTRALIAN UNIVERSITY SURVEY SUMMARY OF QUESTIONNAIRE RESULTS WHAT IS THE STATE OF EDUCATION FOR ENERGY EFFICIENCY IN AUSTRALIAN ENGINEERING EDUCATION? PREPARED BY: #12;State of Education for Energy Efficiency in Australian Engineering Education Summary

  10. 2008NaturePublishingGrouphttp://www.nature.com/naturechemicalbiology Quantitative exploration of the catalytic landscape

    E-Print Network [OSTI]

    Zhang, Jianzhi

    and Hyoscyamus muticus, we created a library of all possible residue combinations (29 ľ 512) in the N. tabacum) a simplified set of naturally occurring mutations that interconvert a defined catalytic property for measur- ing the catalytic properties (recording the chemical readout) of the enzyme library. Therefore

  11. Redox Catalytic Properties of Palladium Nanoparticles: Surfactant and Electron Donor-Acceptor Effects

    E-Print Network [OSTI]

    Wang, Zhong L.

    Redox Catalytic Properties of Palladium Nanoparticles: Surfactant and Electron Donor-0245 Received April 27, 1999. In Final Form: November 10, 1999 Dye reduction catalyzed by palladium catalysts,21-24 and shown that the redox catalytic property of still growing and fully grown palladium

  12. MEMS-based fuel cells with integrated catalytic fuel processor and method thereof

    SciTech Connect (OSTI)

    Jankowski, Alan F.; Morse, Jeffrey D.; Upadhye, Ravindra S.; Havstad, Mark A.

    2011-08-09

    Described herein is a means to incorporate catalytic materials into the fuel flow field structures of MEMS-based fuel cells, which enable catalytic reforming of a hydrocarbon based fuel, such as methane, methanol, or butane. Methods of fabrication are also disclosed.

  13. Comparison of the Catalytic Oxidation Reaction on Graphene Oxide and Reduced Graphene Oxide

    E-Print Network [OSTI]

    Kim, Sehun

    Comparison of the Catalytic Oxidation Reaction on Graphene Oxide and Reduced Graphene Oxide catalytic systems.12,13 On the other hand, the reduced graphene oxide (rGO) is functionalized graphene Laboratory (PAL), Pohang 790-784, Republic of Korea ABSTRACT: The capacities of graphene oxide (GO

  14. Control of Natural Gas Catalytic Partial Oxidation for Hydrogen Generation in Fuel Cell Applications1

    E-Print Network [OSTI]

    Peng, Huei

    Control of Natural Gas Catalytic Partial Oxidation for Hydrogen Generation in Fuel Cell the anode field of fuel cell stack is considered. The first reactor that generates the majority in the fuel cell anode and (ii) the temperature of the catalytic partial oxidation reactor during transient

  15. An atomic-scale analysis of catalytically-assisted chemical vapor deposition of carbon nanotubes

    E-Print Network [OSTI]

    Grujicic, Mica

    ) their unique structure makes them suitable for tailored nanometer- scale membranes and molecular sieves [5]; (dAn atomic-scale analysis of catalytically-assisted chemical vapor deposition of carbon nanotubes M Growth of carbon nanotubes during transition-metal particles catalytically-assisted thermal decomposition

  16. PREFERENTIAL OXIDATION OF CARBON MONOXIDE IN A THIN-FILM CATALYTIC MICROREACTOR: ADVANTAGES AND LIMITATIONS

    E-Print Network [OSTI]

    Besser, Ronald S.

    PREFERENTIAL OXIDATION OF CARBON MONOXIDE IN A THIN-FILM CATALYTIC MICROREACTOR: ADVANTAGES stream after hydrocarbon fuel reforming and water-gas-shift reactions. This process, referred to as CO intermediate, which enhances the catalytic activity at temperatures below 200įC. With the same catalyst system

  17. Catalytic oxidation of CO by platinum group metals: from ultrahigh vacuum to elevated pressures

    E-Print Network [OSTI]

    Goodman, Wayne

    oxidation over platinum group metals has been investigated for some eight decades by many researchersCatalytic oxidation of CO by platinum group metals: from ultrahigh vacuum to elevated pressures A Catalytic oxidation of CO over platinum group metals (Pt, Ir, Rh and Pd) has been the subject of many

  18. Multiscale Modeling and Solution Multiplicity in Catalytic Pellet Reactors Kedar Kulkarni,

    E-Print Network [OSTI]

    Linninger, Andreas A.

    Multiscale Modeling and Solution Multiplicity in Catalytic Pellet Reactors Kedar Kulkarni, Jeonghwa phenomena in catalytic pellet reactors are often difficult to analyze because of coupling between heat at the macroscopic level as well as the catalyst pellets at the microscopic level. The resulting approach yields

  19. ORIGINAL PAPER Synthesis of WO3 catalytic powders: evaluation of photocatalytic

    E-Print Network [OSTI]

    ORIGINAL PAPER Synthesis of WO3 catalytic powders: evaluation of photocatalytic activity under NUV New York 2015 Abstract WO3 catalytic powders were successfully syn- thesized from tungstic acid-temperature hydrothermal treatment. WO3 crystallization process was completed with calcina- tion of the samples at 500

  20. Institute for Atom-Efficient Chemical Transformations Energy...

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

    Marshall Name Christopher L. Marshall Institution Argonne National Laboratory Department Chemical Sciences and Engineering Division Areas of Focus Characterization & Catalytic...

  1. Coupled diffusional/displacive transformations

    E-Print Network [OSTI]

    Mujahid, Shafiq Ahmad

    the variation in the martensite-start temperature with carbon concentration, but fails to estimate the corresponding changes in the bainite-start temperatures of the same steels. Thus, the accuracy claimed by the original theory appears fortuitous for bainite... and tempered steels and ball bearing alloys. Important recent developments involving the martensitic transformation in steels in- clude maraging steel (precipitation-hardened martensite), TRIP steels (transformation in- duced plasticity), ausforming steels...

  2. Phase Transformations in Heterogeneous Steels

    E-Print Network [OSTI]

    Khan, Shahid Amin

    1990-05-08

    for autocatalysis, relying on the fact that immediate vicinity of a plate is disturbed quite severely by a combination of elastic and plastic deformation processes due to the shear like nature of the transformation. ē Stress-induced Nucleation, i.e., the activation... elements in steels is twofold. They can affect both the thermodynamics and kinetics of transformations. The hardenability of steels is related directly to the in- fluence on the nucleation and growth kinetics of the decomposition products. Primarily...

  3. Energy Department Finalizes Loan Guarantee for Transformational...

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

    for Transformational Rooftop Solar Project Energy Department Finalizes Loan Guarantee for Transformational Rooftop Solar Project September 30, 2011 - 3:37pm Addthis Washington D.C....

  4. Metamaterial flexible sheets could transform optics

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

    Metamaterial flexible sheets could transform optics Metamaterial flexible sheets could transform optics Advances would boost security screening systems, infrared thermal cameras,...

  5. Building America Expert Meeting: Transforming Existing Buildings...

    Energy Savers [EERE]

    Transforming Existing Buildings through New Media--An Idea Exchange Building America Expert Meeting: Transforming Existing Buildings through New Media--An Idea Exchange This report...

  6. Marketing and Market Transformation | Department of Energy

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

    Market Transformation Presentation More Documents & Publications Marketing and Market Transformation Working with the Real Estate Sector Trends in Real Estate and Energy Efficiency...

  7. Environmental Report Project Transforms Students into Informed...

    Energy Savers [EERE]

    Environmental Report Project Transforms Students into Informed Stakeholders Environmental Report Project Transforms Students into Informed Stakeholders June 20, 2014 - 9:49am...

  8. Mild Catalytic methods for Alkyl-Alkyl Bond Formation

    SciTech Connect (OSTI)

    Vicic, David A

    2009-08-10

    Overview of Research Goals and Accomplishments for the Period 07/01/06 Ė 06/30/07: Our overall research goal is to transform the rapidly emerging synthetic chemistry involving alkyl-alkyl cross-couplings into more of a mechanism-based field so that that new, rationally-designed catalysts can be performed under energy efficient conditions. Our specific objectives for the previous year were 1) to obtain a proper electronic description of an active catalyst for alkyl-alkyl cross-coupling reactions and 2) to determine the effect of ligand structure on the rate, scope, selectivity, and functional group compatibility of C(sp3)-C(sp3) cross-coupling catalysis. We have completed both of these initial objectives and established a firm base for further studies. The specific significant achievements of the current grant period include: 1) we have performed magnetic and computational studies on (terpyridine)NiMe, an active catalyst for alkyl-alkyl cross couplings, and have discovered that the unpaired electron resides heavily on the terpyridine ligand and that the proper electronic description of this nickel complex is a Ni(II)-methyl cation bound to a reduced terpyridine ligand; 2) we have for the first time shown that alkyl halide reduction by terpyridyl nickel catalysts is substantially ligand based; 3) we have shown by isotopic labeling studies that the active catalyst (terpyridine)NiMe is not produced via a mechanism that involves the formation of methyl radicals when (TMEDA)NiMe2 is used as the catalyst precursor; 4) we have performed an extensive ligand survey for the alkyl-alkyl cross-coupling reactions and have found that electronic factors only moderately influence reactivity in the terpyridine-based catalysis and that the most dramatic effects arise from steric and solubility factors; 5) we have found that the use of bis(dialkylphosphino)methanes as ligands for nickel does not produce active catalysts for cross-coupling but rather leads to bridging hydride complexes of varying geometries; 6) we have determined that the geometry of aforementioned bridging hydride complexes is largely determined by external forces such as hydrogen bonding interactions and crystal packing forces; 7) we have found that the rate of reductive elimination of alkane from a (pyridyl-2-pyrrolide)AuMe2 complex is severely inhibited due to the rigid geometry of the pyridyl-2-pyrrolide ligand; 8) we have prepared, structurally characterized, and explored the reactivity of 1-adamantylzinc reagents as model nucleophiles for sterically challenging alkyl-alkyl cross-coupling reactions. The continued success of this work will lead to alkyl-alkyl cross-coupling catalysts with broad scope and selectivities. The work has potential to significantly impact science and technologies of interest to the DOE as the chemistry is focused on developing useful reactions using reagents that can be directly prepared from petroleum and natural gas feedstocks. Moreover, the developing synthetic chemistry can profoundly affect the way materials, fine chemicals, and drugs are made. Since the methodology we are developing can shorten existing synthetic protocols, proceed at room temperature, and operate under environmentally benign conditions, it can greatly reduce energy expenditures, especially considering the contribution of the chemical manufacturing field to the gross domestic product.

  9. Signal Analysis by Generalized Hilbert Transforms on the Unit Sphere

    SciTech Connect (OSTI)

    Wietzke, Lennart; Fleischmann, Oliver; Sommer, Gerald [Institute of Computer Science, Chair of Cognitive Systems, Christian-Albrechts-University of Kiel (Germany)

    2008-09-01

    In 1D signal processing local energy and phase can be determined by the analytic signal. Local energy, phase and orientation of 2D signals can be analyzed by the monogenic signal for all i(ntrinsic)1D signals in an rotational invariant way by the generalized Hilbert transform. In order to analyze both i1D and i2D signals in one framework the main idea of this contribution is to lift up 2D signals to the higher dimensional conformal space in which the original signal can be analyzed with more degrees of freedom by the generalized Hilbert transform on the unit sphere. An appropriate embedding of 2D signals on the unit sphere results in an extended feature space spanned by local energy, phase, orientation/direction and curvature. In contrast to classical differential geometry, local curvature can now be determined by the generalized Hilbert transform in monogenic scale space without any derivatives.

  10. Role of the nanoscale in catalytic CO oxidation by supported Au and Pt nanostructures Sergey N. Rashkeev,1,2,

    E-Print Network [OSTI]

    Pennycook, Steve

    Role of the nanoscale in catalytic CO oxidation by supported Au and Pt nanostructures Sergey N found that the catalytic activity of Au increases sharply for supported nanoparticles smaller than 5 nm in catalytically active TiO2-supported Au nanoparticles. DOI: 10.1103/PhysRevB.76.035438 PACS number s : 82.65. r I

  11. On-Line Estimation of Inlet and Outlet Composition in Catalytic Partial Ali Al-Matouq , Tyrone Vincent

    E-Print Network [OSTI]

    Vincent, Tyrone

    On-Line Estimation of Inlet and Outlet Composition in Catalytic Partial Oxidation Ali Al and outlet composition of catalytic partial oxidation (CPOX) of methane over rhodium catalyst using simple experiments are conducted to verify the accuracy of the estimator. Keywords: Catalytic Partial Oxidation

  12. Enhanced Catalytic Activity through the Tuning of Micropore Environment and Supercritical CO2 Processing: Al(Porphyrin)-Based

    E-Print Network [OSTI]

    Enhanced Catalytic Activity through the Tuning of Micropore Environment and Supercritical CO2 that is catalytically active in the methanolysis of a nerve agent simulant. Supercritical CO2 processing of the POP and supercritical CO2 processing. In designing catalytically active Al-PPOPs, we wanted to control, through

  13. Catalytic Fast Pyrolysis for the Production of the Hydrocarbon Biofuels

    SciTech Connect (OSTI)

    Nimlos, M. R.; Robichaud, D. J.; Mukaratate, C.; Donohoe, B. S.; Iisa, K.

    2013-01-01

    Catalytic fast pyrolysis is a promising technique for conversion of biomass into hydrocarbons for use as transportation fuels. For over 30 years this process has been studied and it has been demonstrated that oils can be produced with high concentrations of hydrocarbons and low levels of oxygen. However, the yields from this type of conversion are typically low and the catalysts, which are often zeolites, are quickly deactivated through coking. In addition, the hydrocarbons produced are primarily aromatic molecules (benzene, toluene, xylene) that not desirable for petroleum refineries and are not well suited for diesel or jet engines. The goals of our research are to develop new multifunction catalysts for the production of gasoline, diesel and jet fuel range molecules and to improve process conditions for higher yields and low coking rates. We are investigating filtration and the use of hydrogen donor molecules to improve catalyst performance.

  14. Catalytic Hydrogenation of Bio-Oil for Chemicals and Fuels

    SciTech Connect (OSTI)

    Elliott, Douglas C.

    2006-02-14

    The scope of work includes optimizing processing conditions and demonstrating catalyst lifetime for catalyst formulations that are readily scaleable to commercial operations. We use a bench-scale, continuous-flow, packed-bed, catalytic, tubular reactor, which can be operated in the range of 100-400 mL/hr., from 50-400 C and up to 20MPa (see Figure 1). With this unit we produce upgraded bio-oil from whole bio-oil or useful bio-oil fractions, specifically pyrolytic lignin. The product oils are fractionated, for example by distillation, for recovery of chemical product streams. Other products from our tests have been used in further testing in petroleum refining technology at UOP and fractionation for product recovery in our own lab. Further scale-up of the technology is envisioned and we will carry out or support process design efforts with industrial partners, such as UOP.

  15. Producing Clean Syngas via Catalytic Reforming for Fuels Production

    SciTech Connect (OSTI)

    Magrini, K. A.; Parent, Y.; Jablonski, W.; Yung, M.

    2012-01-01

    Thermochemical biomass conversion to fuels and chemicals can be achieved through gasification to syngas. The biomass derived raw syngas contains the building blocks of carbon monoxide and hydrogen as well as impurities such as tars, light hydrocarbons, and hydrogen sulfide. These impurities must be removed prior to fuel synthesis. We used catalytic reforming to convert tars and hydrocarbons to additional syngas, which increases biomass carbon utilization. In this work, nickel based, fluidizable tar reforming catalysts were synthesized and evaluated for tar and methane reforming performance with oak and model syngas in two types of pilot scale fluidized reactors (recirculating and recirculating regenerating). Because hydrogen sulfide (present in raw syngas and added to model syngas) reacts with the active nickel surface, regeneration with steam and hydrogen was required. Pre and post catalyst characterization showed changes specific to the syngas type used. Results of this work will be discussed in the context of selecting the best process for pilot scale demonstration.

  16. Origin of fast electrons in catalytic hydrogen oxidation over platinum

    E-Print Network [OSTI]

    Maximoff, Sergey N

    2014-01-01

    Adsorption of small molecules and chemical reactions at metal surfaces always excite low energy electron-hole pairs since the electron-hole pair excitations are gapless. In an example catalytic process, $\\mathrm{H_2}$ oxidation by $\\mathrm{O_2}$ into $\\mathrm{H_2O}$ over a platinum surface $\\mathrm{Pt(111)}$, this report explains that a different mechanism must also excite a non-equilibrium population of fast electrons, which arise as charged surface intermediates develop and then discharge during rapid electron transfer events. The empirical evidence and quantum chemistry calculations further reveal that the transition states in the $\\mathrm{H_2}$ oxidation are the lowest threshold configurations for changing the charge of the negatively charged surface intermediates as in, e.g., $``\\mathrm{O^-+H^-}"\\rightleftarrows [``\\mathrm{O^-+H+e}"]^{\

  17. Methods and apparatus for catalytic hydrothermal gasification of biomass

    DOE Patents [OSTI]

    Elliott, Douglas C.; Butner, Robert Scott; Neuenschwander, Gary G.; Zacher, Alan H.; Hart, Todd R.

    2012-08-14

    Continuous processing of wet biomass feedstock by catalytic hydrothermal gasification must address catalyst fouling and poisoning. One solution can involve heating the wet biomass with a heating unit to a temperature sufficient for organic constituents in the feedstock to decompose, for precipitates of inorganic wastes to form, for preheating the wet feedstock in preparation for subsequent separation of sulfur contaminants, or combinations thereof. Treatment further includes separating the precipitates out of the wet feedstock, removing sulfur contaminants, or both using a solids separation unit and a sulfur separation unit, respectively. Having removed much of the inorganic wastes and the sulfur that can cause poisoning and fouling, the wet biomass feedstock can be exposed to the heterogeneous catalyst for gasification.

  18. Ex-Situ Catalytic Fast Pyrolysis Technology Pathway

    SciTech Connect (OSTI)

    Biddy, Mary J.; Dutta, Abhijit; Jones, Susanne B.; Meyer, Pimphan A.

    2013-03-31

    In support of the Bioenergy Technologies Office, the National Renewable Energy Laboratory (NREL) and the Pacific Northwest National Laboratory (PNNL) are undertaking studies of biomass conversion technologies to hydrocarbon fuels to identify barriers and target research toward reducing conversion costs. Process designs and preliminary economic estimates for each of these pathway cases were developed using rigorous modeling tools (Aspen Plus and Chemcad). These analyses incorporated the best information available at the time of development, including data from recent pilot and bench-scale demonstrations, collaborative industrial and academic partners, and published literature and patents. This pathway case investigates converting woody biomass using ex-situ catalytic fast pyrolysis followed by upgrading to gasoline , diesel and jet range blendstocks . Technical barriers and key research needs that should be pursued for this pathway to be competitive with petroleum-derived blendstocks have been identified.

  19. In-Situ Catalytic Fast Pyrolysis Technology Pathway

    SciTech Connect (OSTI)

    Biddy, Mary J.; Dutta, Abhijit; Jones, Susanne B.; Meyer, Pimphan A.

    2013-03-31

    In support of the Bioenergy Technologies Office, the National Renewable Energy Laboratory (NREL) and the Pacific Northwest National Laboratory (PNNL) are undertaking studies of biomass conversion technologies to hydrocarbon fuels to identify barriers and target research toward reducing conversion costs. Process designs and preliminary economic estimates for each of these pathway cases were developed using rigorous modeling tools (Aspen Plus and Chemcad). These analyses incorporated the best information available at the time of development, including data from recent pilot and bench-scale demonstrations, collaborative industrial and academic partners, and published literature and patents. This pathway case investigates converting woody biomass using in-situ catalytic fast pyrolysis followed by upgrading to gasoline, diesel, and jet range blendstocks. Technical barriers and key research needs that should be pursued for this pathway to be competitive with petroleum-derived blendstocks have been identified.

  20. Coal hydrogenation and deashing in ebullated bed catalytic reactor

    DOE Patents [OSTI]

    Huibers, Derk T. A. (Pennington, NJ); Johanson, Edwin S. (Princeton, NJ)

    1983-01-01

    An improved process for hydrogenation of coal containing ash with agglomeration and removal of ash from an ebullated bed catalytic reactor to produce deashed hydrocarbon liquid and gas products. In the process, a flowable coal-oil slurry is reacted with hydrogen in an ebullated catalyst bed reaction zone at elevated temperature and pressure conditions. The upward velocity and viscosity of the reactor liquid are controlled so that a substantial portion of the ash released from the coal is agglomerated to form larger particles in the upper portion of the reactor above the catalyst bed, from which the agglomerated ash is separately withdrawn along with adhering reaction zone liquid. The resulting hydrogenated hydrocarbon effluent material product is phase separated to remove vapor fractions, after which any ash remaining in the liquid fraction can be removed to produce substantially ash-free coal-derived liquid products.

  1. Fabrication of fuel cell electrodes and other catalytic structures

    DOE Patents [OSTI]

    Smith, J.L.

    1987-02-11

    A porous layer of catalyst material suitable for use as an electrode in a molten carbonate fuel cell includes elongated pores substantially extending across the layer thickness. The catalyst layer is prepared by depositing particulate catalyst material into polymeric flocking on a substrate surface by a procedure such as tape casting. The loaded substrate is heated in a series of steps with rising temperatures to set the tape, thermally decompose the substrate with flocking and sinter bond the catalyst particles into a porous catalytic layer with elongated pores across its thickness. Employed as an electrode, the elongated pores provide distribution of reactant gas into contact with catalyst particles wetted by molten electrolyte. 1 fig.

  2. Method For Selective Catalytic Reduction Of Nitrogen Oxides

    DOE Patents [OSTI]

    Mowery-Evans, Deborah L. (Broomfield, CO); Gardner, Timothy J. (Albuquerque, NM); McLaughlin, Linda I. (Albuquerque, NM)

    2005-02-15

    A method for catalytically reducing nitrogen oxide compounds (NO.sub.x, defined as nitric oxide, NO, +nitrogen dioxide, NO.sub.2) in a gas by a material comprising a base metal consisting essentially of CuO and Mn, and oxides of Mn, on an activated metal hydrous metal oxide support, such as HMO:Si. A promoter, such as tungsten oxide or molybdenum oxide, can be added and has been shown to increase conversion efficiency. This method provides good conversion of NO.sub.x to N.sub.2, good selectivity, good durability, resistance to SO.sub.2 aging and low toxicity compared with methods utilizing vanadia-based catalysts.

  3. Method for selective catalytic reduction of nitrogen oxides

    DOE Patents [OSTI]

    Mowery-Evans, Deborah L. (Broomfield, CO); Gardner, Timothy J. (Albuquerque, NM); McLaughlin, Linda I. (Albuquerque, NM)

    2005-02-15

    A method for catalytically reducing nitrogen oxide compounds (NO.sub.x, defined as nitric oxide, NO, +nitrogen dioxide, NO.sub.2) in a gas by a material comprising a base metal consisting essentially of CuO and Mn, and oxides of Mn, on an activated metal hydrous metal oxide support, such as HMO:Si. A promoter, such as tungsten oxide or molybdenum oxide, can be added and has been shown to increase conversion efficiency. This method provides good conversion of NO.sub.x to N.sub.2, good selectivity, good durability, resistance to SO.sub.2 aging and low toxicity compared with methods utilizing vanadia-based catalysts.

  4. Catalytic Synthesis of Oxygenates: Mechanisms, Catalysts and Controlling Characteristics

    SciTech Connect (OSTI)

    Kamil Klier; Richard G. Herman

    2005-11-30

    This research focused on catalytic synthesis of unsymmetrical ethers as a part of a larger program involving oxygenated products in general, including alcohols, ethers, esters, carboxylic acids and their derivatives that link together environmentally compliant fuels, monomers, and high-value chemicals. The catalysts studied here were solid acids possessing strong Br√?¬?√?¬?√?¬?√?¬łnsted acid functionalities. The design of these catalysts involved anchoring the acid groups onto inorganic oxides, e.g. surface-grafted acid groups on zirconia, and a new class of mesoporous solid acids, i.e. propylsulfonic acid-derivatized SBA-15. The former catalysts consisted of a high surface concentration of sulfate groups on stable zirconia catalysts. The latter catalyst consists of high surface area, large pore propylsulfonic acid-derivatized silicas, specifically SBA-15. In both cases, the catalyst design and synthesis yielded high concentrations of acid sites in close proximity to one another. These materials have been well-characterization in terms of physical and chemical properties, as well as in regard to surface and bulk characteristics. Both types of catalysts were shown to exhibit high catalytic performance with respect to both activity and selectivity for the bifunctional coupling of alcohols to form ethers, which proceeds via an efficient SN2 reaction mechanism on the proximal acid sites. This commonality of the dual-site SN2 reaction mechanism over acid catalysts provides for maximum reaction rates and control of selectivity by reaction conditions, i.e. pressure, temperature, and reactant concentrations. This research provides the scientific groundwork for synthesis of ethers for energy applications. The synthesized environmentally acceptable ethers, in part derived from natural gas via alcohol intermediates, exhibit high cetane properties, e.g. methylisobutylether with cetane No. of 53 and dimethylether with cetane No. of 55-60, or high octane properties, e.g. diisopropylether with blending octane No. of 105, and can replace aromatics in liquid fuels.

  5. Continuous Cooling Transformation (CCT) Assistant Professor

    E-Print Network [OSTI]

    Cambridge, University of

    Continuous Cooling Transformation (CCT) Diagrams R. Manna Assistant Professor Centre of Advanced.ac.uk #12;Continuous cooling transformation (CCT) diagram There are two types of CCT diagrams I) Plot and transformation finish temperature against transformation time on each cooling curve II) Plot of (for each type

  6. Transformations on Willmore surfaces Katrin Leschke

    E-Print Network [OSTI]

    Banaji,. Murad

    Transformations on Willmore surfaces Katrin Leschke Habilitationsschrift zur Erlangung der Venia . . . . . . . . . . . . . . . . . . . . . . . . . . 43 2 Transformations on conformal maps 47 2.1 The Darboux transformation . . . . . . . . . . . . . . . . . . . . . . . . . 47 2.1.1 The classical Darboux transformation on isothermic surfaces . . . 48 2.1.2 The spectral

  7. Catalytic hydrodechlorination of chlorocarbons. 2: Ternary oxide supports for catalytic conversions of 1,2-dichlorobenzene

    SciTech Connect (OSTI)

    Gampine, A.; Eyman, D.P. [Univ. of Iowa, Iowa City, IA (United States). Dept. of Chemistry] [Univ. of Iowa, Iowa City, IA (United States). Dept. of Chemistry

    1998-10-01

    Ternary oxides of Ti-Zr-Al and Ti-Zr-Si were prepared by coating commercial Al{sub 2}O{sub 3} and SiO{sub 2} with a THF solution of Ti(OPr{sup i}){sub 4} and Zr(OPr{sup 1}){sub 4} under controlled conditions. Nitrogen adsorption and X-ray powder diffraction indicate that the structure of the base supports, Al{sub 2}O{sub 3} and SiO{sub 2}, were not significantly altered upon coating and that TiO{sub 2} and ZrO{sub 2} were quite uniformly spread on them. The acid resistance of alumina was found to be increased upon coating. Palladium supported catalysts, Pd/TiZrAlO{sub x}, Pd/TiZrSiO{sub x}, Pd/TiO{sub 2}, Pd/ZrO{sub 2}, Pd/SiO{sub 2}, and Pd/Al{sub 2}O{sub 3} were prepared to evaluate the ternary oxides relative to the component single oxide supports. Palladium dispersion was determined using hydrogen chemisorption and the catalysts were evaluated for hydrodechlorination of 1,2-dichlorobenzene. The experimental runs were carried out in a microflow reactor system at atmospheric pressure, in the gas phase. The catalysts were oxidized and then reduced, prior to reaction. The kinetic studies showed that the ternary oxide-based catalyst, Pd/TiZrAlO{sub x} exhibited an improved stability and activity much higher than the arithmetic sum of the activities of the component single oxide based palladium catalysts. Comparison of the specific activities of the catalysts expressed as TOF, indicate that the observed differences in activity may be related to the chemical nature of the supports. The best catalyst had an initial specific activity of 16.6 s{sup {minus}1}. The authors observed that the pretreatment of the catalyst has a profound effect on its stability and activity. Also, the experimental results indicated that the major factors of the catalyst deactivation are agglomeration of palladium particles and HCl poisoning. Prospects for optimization of these catalysts are discussed in light of the results of this work.

  8. Phase Transformations in Confined Nanosystems

    SciTech Connect (OSTI)

    Shield, Jeffrey E.; Belashchenko, Kirill

    2014-04-29

    This project discovered that non-equilibrium structures, including chemically ordered structures not observed in bulk systems, form in isolated nanoscale systems. Further, a generalized model was developed that effectively explained the suppression of equilibrium phase transformations. This thermodynamic model considered the free energy decrease associated with the phase transformation was less than the increase in energy associated with the formation of an interphase interface, therefore inhibiting the phase transformation. A critical diameter exists where the system transitions to bulk behavior, and a generalized equation was formulated that successfully predicted this transition in the Fe-Au system. This provided and explains a new route to novel structures not possible in bulk systems. The structural characterization was accomplished using transmission electron microscopy in collaboration with Matthew Kramer of Ames Laboratory. The PI and graduate student visited Ames Laboratory several times a year to conduct the experiments.

  9. Fourier transforms of UD integrals

    E-Print Network [OSTI]

    Igor Kondrashuk; Anatoly Kotikov

    2008-02-23

    UD integrals published by N. Usyukina and A. Davydychev in 1992-1993 are integrals corresponding to ladder-type Feynman diagrams. The results are UD functions $\\Phi^{(L)},$ where $L$ is the number of loops. They play an important role in N=4 supersymmetic Yang-Mills theory. The integrals were defined and calculated in the momentum space. In this paper the position space representation of UD functions is investigated. We show that Fourier transforms of UD functions are UD functions of space-time intervals but this correspondence is indirect. For example, the Fourier transform of the second UD integral is the second UD integral.

  10. Development of Toroidal Core Transformers

    SciTech Connect (OSTI)

    Leon, Francisco

    2014-05-31

    The original objective of this project was to design, build and test a few prototypes of singlephase dry-type distribution transformers of 25 kVA, 2.4 kV primary to 120 V transformers using cores made of a continuous steel strip shaped like a doughnut (toroid). At different points during the development of the project, the scope was enhanced to include the more practical case of a 25 kVA transformer for a 13.8 kV primary system voltage. Later, the scope was further expanded to design and build a 50 kVA unit to transformer voltage from 7.62 kV to 2x120 V. This is a common transformer used by Con Edison of New York and they are willing to test it in the field. The project officially started in September 2009 and ended in May 2014. The progress was reported periodically to DOE in eighteen quarterly reports. A Continuation Application was submitted to DOE in June 2010. In May 2011 we have requested a non-cost extension of the project. In December 2011, the Statement of Project Objectives (SOPO) was updated to reflect the real conditions and situation of the project as of 2011. A second Continuation Application was made and funding was approved in 2013 by DOE and the end date was extended to May 2014.The technical challenges that were overcome in this project include: the development of the technology to pass the impulse tests, derive a model for the thermal performance, produce a sound mechanical design, and estimate the inrush current. However, the greatest challenge that we faced during the development of the project was the complications of procuring the necessary parts and materials to build the transformers. The actual manufacturing process is relatively fast, but getting all parts together is a very lengthy process. The main products of this project are two prototypes of toroidal distribution transformers of 7.62 kV (to be used in a 13.8 kV system) to 2x120 V secondary (standard utilization voltage); one is rated at 25 kVA and the other at 50 kVA. The 25 kVA transformer passed the impulse test in KEMA high-voltage laboratories. Additional products include: nine papers published in the IEEE Transactions on Power Delivery, one patent has been filed, three PhD students were supported from beginning to graduation, five postdoctoral fellows, and three MSc students were partially supported. The electrical characteristics of our dry-type toroidal transformers are similar to those of the oil-immersed pole mounted transformers currently in use by many utilities, but toroids have higher efficiency. The no-load losses of the 50 kVA prototype are only 45 W. A standard transformer has no-load losses between 90 and 240 W. Thus, even the finest transformer built today with standard technology has double the amount of no-load losses than the prototype toroidal transformer. When the manufacturing process is prepared for mass production, the cost of a dry-type toroidal transformer would be similar to the price of an oil-filed standard design. However, because of the greatly reduced losses, the total ownership cost of a toroidal transformer could be about half of a traditional design. We got a grant from Power Bridge NY in the amount of $149,985 from June 2014 to May 2015 to continue developing the transformer with commercialization objectives. We are considering the possibility to incorporate a company to manufacture the transformers and have contacted investors. The current status of the real life testing is as follows: after several months of silence, Con Edison has re-started conversations and has shown willingness to test the transformer. Other companies, PSE&G and National Grid have recently also shown interest and we will present our product to them soon.

  11. Polyanalytic relativistic second Bargmann transforms

    E-Print Network [OSTI]

    Zouhair Mouayn

    2015-04-01

    We construct coherent states through special superpositions of photon number states of the relativistic isotonic oscillator. In each superposition the coefficients are chosen to be L 2 eingenfunctions of a sigma weight Maass Laplacian on the Poincare disk, which are associated with discrete eigenvalues. For each nonzero m the associated coherent states transform constitutes the m true polyanalytic extension of a relativistic version of the second Bargmann transform, whose integral kernel is expressed in terms of a special Appel Kampe de Feriet hypergeometric function. The obtained results could be used to extend the known semi classical analysis of quantum dynamics of the relativistic isotonic oscillator.

  12. Diffractive optical elements for transformation of modes in lasers

    DOE Patents [OSTI]

    Sridharan, Arun K.; Pax, Paul H.; Heebner, John E.; Drachenberg, Derrek R.; Armstrong, James P.; Dawson, Jay W.

    2015-09-01

    Spatial mode conversion modules are described, with the capability of efficiently transforming a given optical beam profile, at one plane in space into another well-defined optical beam profile at a different plane in space, whose detailed spatial features and symmetry properties can, in general, differ significantly. The modules are comprised of passive, high-efficiency, low-loss diffractive optical elements, combined with Fourier transform optics. Design rules are described that employ phase retrieval techniques and associated algorithms to determine the necessary profiles of the diffractive optical components. System augmentations are described that utilize real-time adaptive optical techniques for enhanced performance as well as power scaling.

  13. The Dual Horospherical Radon Transform as a Limit of Spherical Radon Transforms

    E-Print Network [OSTI]

    Pasquale, Angela

    The Dual Horospherical Radon Transform as a Limit of Spherical Radon Transforms J. Hilgert, A of G. The horospherical Radon transform maps functions on X to functions on HorX by integrating over the dual horospherical Radon transform as a limit of dual spherical Radon transforms. 1. Introduction

  14. On the equivalence of state transformer semantics and predicate transformer semantics

    E-Print Network [OSTI]

    Keimel, Klaus

    On the equivalence of state transformer semantics and predicate transformer semantics Dedicated and the author [13] have worked out the equivalence between state transformer semantics and predicate transformer the last section, where the equivalence of predicate and state transformer semantics is finally put

  15. ENGI 2422 Laplace Transforms Page 5-01 5.01 Transforms

    E-Print Network [OSTI]

    George, Glyn

    ENGI 2422 Laplace Transforms Page 5-01 5.01 Transforms In some situations, a difficult problem can be transformed into an easier problem, whose solution can be transformed back into the solution of the original problem. For example, an integrating factor can sometimes be found to transform a non-exact first order

  16. Model Transformations? Transformation Models! Jean Bezivin (A) , Fabian Buttner (B) , Martin Gogolla (B) ,

    E-Print Network [OSTI]

    Gogolla, Martin - Fachbereich 3

    Model Transformations? Transformation Models! Jean Bezivin (A) , Fabian Bň?uttner (B) , Martin of the current work on model transformations seems essentially operational and executable in nature. Executable, transformations can also be viewed as descriptive models by stating only the properties a transformation has

  17. Cleavage of biphenyl moieties: An efficient new reaction pathway in catalytic hydrocracking

    SciTech Connect (OSTI)

    Klein, M.T.; Lapinas, A.T.; Gates, B.C.; Read, C.J.; Lyons, J.E. (Univ. of Delaware, Newark (United States)); Macris, A. (Sun Co., Marcus Hook, PA (United States))

    1992-10-01

    The hydrocracking of the five-carbon-membered-ring-containing PNA fluoranthsene (I) is qualitatively different from the classical pattern. A major reaction pathway involves hydrogenation to give tetrahydrofluoranthene (II), center ring opening to give phenyl tetralin (III), and biphenyl cleavage to give tetralin (IV) and benzene. This mechanism includes protonation of (III) followed by an internal 1,5-hydride shift to afford the carbenium ion III{sup +}, of III, represented in the benzylic form. A 1,3-hydride shift of a resonance form of III{sup +} affords benzene and a carbenium ion IV{sup +}, the deprotonation of which leads to an intermediate, dialin, which is rapidly hydrogenated to yield tetralin. The noteworthy reaction in the sequence, which is a net 1.5-shift of the benzylic hydride to the ring bearing the positively charged carbon, evidently takes place along a molecular topology that includes a strong biphenyl linkage. This suggests an apparent structural moiety for efficient cleavage of strong biphenyl linkages, which otherwise would require prior hydrogenation. Thus, the authors have investigated the catalytic hydrocracking of molecules that either contain this structural moiety, or can react to form it. Experiments were done to determine the hydrocracking pathways and kinetics of 9-ethyl fluorene, 9-phenyl anthracene, and 2-phenyl naphthalene in the presence of an equilibrated Ni-Mo/Al{sub 2}O{sub 3}-catalyst-containing ultra-stable Y-Zeolite at 310-380 C and 153 atm.

  18. Catalytic Hydroprocessing of Biomass Fast Pyrolysis Bio-oil to Produce Hydrocarbon Products

    SciTech Connect (OSTI)

    Elliott, Douglas C.; Hart, Todd R.; Neuenschwander, Gary G.; Rotness, Leslie J.; Zacher, Alan H.

    2009-10-01

    Catalytic hydroprocessing has been applied to biomass fast pyrolysis liquid product (bio-oil) in a bench-scale continuous-flow fixed-bed reactor system. The intent of the research was to develop process technology to convert the bio-oil into a petroleum refinery feedstock to supplement fossil energy resources and to displace imported feedstock. The project was a cooperative research and development agreement among UOP LLC, the National Renewable Energy Laboratory and the Pacific Northwest National Laboratory (PNNL). This paper is focused on the process experimentation and product analysis undertaken at PNNL. The paper describes the experimental methods used and relates the results of the product analyses. A range of catalyst formulations were tested over a range of operating parameters including temperature, pressure, and flow-rate with bio-oil derived from several different biomass feedstocks. Effects of liquid hourly space velocity and catalyst bed temperature were assessed. Details of the process results were presented including mass and elemental balances. Detailed analysis of the products were provided including elemental composition, chemical functional type determined by mass spectrometry, and product descriptors such as density, viscosity and Total Acid Number (TAN). In summation, the paper provides an understanding of the efficacy of hydroprocessing as applied to bio-oil.

  19. Induced geometry from disformal transformation

    E-Print Network [OSTI]

    Fang-Fang Yuan; Peng Huang

    2015-02-08

    In this note, we use the disformal transformation to induce a geometry from the manifold which is originally Riemannian. The new geometry obtained here can be considered as a generalization of Weyl integrable geometry. Based on these results, we further propose a geometry which is naturally a generalization of Weyl geometry.

  20. Transforming California's Freight Transport System

    E-Print Network [OSTI]

    California at Davis, University of

    Transforming California's Freight Transport System Policy Forum on the Role of Freight Transport in Achieving Clean Air, Climate Goals, Economic Growth and Healthy Communities in California Jack Kitowski April 19, 2013 1 #12;Freight Impacts at Many Levels 2 #12;Freight Transport Today: Contribution

  1. Chinese Passives: Transformational or Lexical?

    E-Print Network [OSTI]

    Zhang, Jiuwu; Wen, Xiaohong

    1989-01-01

    There are two types of passive constructions in Chinese. Type I is a syntactic passive since it is derived through a transformational rule. Type II is a lexical passive. It has certain properties in common with the predicate adjectives in Chinese...

  2. Material transformation designing shape changing interfaces enabled by programmable material anisotropy

    E-Print Network [OSTI]

    Ou, Jifei

    2014-01-01

    This thesis takes a material perspective on designing transformable interfaces. The structure of material and mechanical properties such as stiffness, can determine not only its static performances, but also, with the help ...

  3. NH3-Selective Catalytic Reduction over Ag/Al2O3 Catalysts | Department...

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

    Catalytic Reduction over AgAl2O3 Catalysts DRIFT spectroscopy used together with flow reactor experiments to investigate the role of H2 for SCR over AgAl2O3 deer12tamm.pdf...

  4. Enhanced thermal and gas flow performance in a three-way catalytic...

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

    thermal and gas flow performance in a three-way catalytic converter through use of insulation within the ceramic monolith Enhanced thermal and gas flow performance in a three-way...

  5. Oxygen transport membrane system and method for transferring heat to catalytic/process reactors

    DOE Patents [OSTI]

    Kelly, Sean M; Kromer, Brian R; Litwin, Michael M; Rosen, Lee J; Christie, Gervase Maxwell; Wilson, Jamie R; Kosowski, Lawrence W; Robinson, Charles

    2014-01-07

    A method and apparatus for producing heat used in a synthesis gas production is provided. The disclosed method and apparatus include a plurality of tubular oxygen transport membrane elements adapted to separate oxygen from an oxygen containing stream contacting the retentate side of the membrane elements. The permeated oxygen is combusted with a hydrogen containing synthesis gas stream contacting the permeate side of the tubular oxygen transport membrane elements thereby generating a reaction product stream and radiant heat. The present method and apparatus also includes at least one catalytic reactor containing a catalyst to promote the stream reforming reaction wherein the catalytic reactor is surrounded by the plurality of tubular oxygen transport membrane elements. The view factor between the catalytic reactor and the plurality of tubular oxygen transport membrane elements radiating heat to the catalytic reactor is greater than or equal to 0.5.

  6. Kinetic modeling of nitric oxide removal from exhaust gases by Selective Non-Catalytic Reduction†

    E-Print Network [OSTI]

    Chenanda, Cariappa Mudappa

    1993-01-01

    Selective Non-Catalytic Reduction is one of the most promising techniques for the removal of oxides of nitrogen from combustion exhaust gases. These techniques are based on the injection of certain compounds, such as cyanuric acid and ammonia...

  7. Evidence for an RNA-based catalytic mechanism in eukaryotic nuclear ribonuclease P.

    E-Print Network [OSTI]

    Thoms, Brian C.; Chamberlain, Joel; Engelke, David R.; Gegenheimer, Peter Albert

    2000-01-01

    are required for activity in vitro as well as in vivo. It is not known, however, which subunits participate directly in phosphodiester-bond hydrolysis. The RNA subunit of nuclear RNase P is evolutionarily related to its catalytically active bacterial...

  8. Catalytic Addition of Simple Alkenes to Carbonyl Compounds by Use of Group 10 Metals

    E-Print Network [OSTI]

    Ho, Chun-Yu

    Recent advances using nickel complexes in the activation of unactivated monosubstituted olefins for catalytic intermolecular carbon-carbon bond-forming reactions with carbonyl compounds, such as simple aldehydes, isocyanates, ...

  9. Variation of Pore Metrics in Metal-Organic Frameworks for Enhanced Storage and Catalytic Applications

    E-Print Network [OSTI]

    Brown, Jonathan Ward

    2015-01-01

    catalytic activity of the metalĖorganic framework [cu3 (btc)2](btc= benzene-1, 3, 5- tricarboxylate). Chemistry-asorption properties of cu-btc metal-organic framework. Nano

  10. Reaction mechanisms for catalytic partial oxidation systems : application to ethylene epoxidation

    E-Print Network [OSTI]

    Anantharaman, Bharthwaj

    2005-01-01

    With the rapid advances in kinetic modeling, building elementary surface mechanisms have become vital to understand the complex chemistry for catalytic partial oxidation systems. Given that there is selected experimental ...

  11. Monodisperse metal nanoparticle catalysts on silica mesoporous supports: synthesis, characterizations, and catalytic reactions

    E-Print Network [OSTI]

    Somorjai, G.A.

    2010-01-01

    by Rh/SBA-15 The catalytic oxidation of CO to CO 2 has beencatalytic activity in high temperature CO oxidation. Thecatalytic activity as high as bare Pt nanoparticles in CO oxidation,

  12. Selective Catalytic Oxidation (SCO) of NH3 to N2 for Hot Exhaust...

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

    Oxidation (SCO) of NH3 to N2 for Hot Exhaust Treatment Selective Catalytic Oxidation (SCO) of NH3 to N2 for Hot Exhaust Treatment Investigation of a series of transition metal...

  13. Impact of Biodiesel-Based Na on the Selective Catalytic Reduction...

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

    Reduction (SCR) of NOx Using Cu-zeolite Impact of Biodiesel-Based Na on the Selective Catalytic Reduction (SCR) of NOx Using Cu-zeolite Discusses the impact of Na in biodiesel...

  14. Supporting Information Tandem Catalytic Conversion of Glucose to 5-Hydroxymethylfurfural with

    E-Print Network [OSTI]

    Zhao, Huimin

    conducted in Kinesis microwave vials (Malta, NY). One unit (U) represents the conversion of 1.0 Ķmole1 Supporting Information Tandem Catalytic Conversion of Glucose to 5-Hydroxymethylfurfural

  15. PERGAMON Carbon 39 (2001) 547558 Synergism of Co and Mo in the catalytic production of single-

    E-Print Network [OSTI]

    Resasco, Daniel

    2001-01-01

    to commercial practice. Fol- ment of the amount of SWNT produced. lowing the original arc-discharge method [1, including laser quantification method of the SWNT produced by catalytic ablation [3,4] and plasma discharge

  16. Structural Studies of the Catalytic and Regulatory Mechanisms of Phenylalanine Hydroxylase†

    E-Print Network [OSTI]

    Li, Jun

    2011-10-21

    The catalytic and regulatory mechanisms of phenylalanine hydroxylase were investigated by structural studies of in this research. Phenylalanine hydroxylase (PheH) hydroxylates phenylalanine to produce tyrosine using tetrahydrobiopterin (BH4...

  17. Regional catalytic economic impacts and noise-damage costs of aviation growth

    E-Print Network [OSTI]

    Tam, Ryan Aung Min, 1973-

    2008-01-01

    There is growing recognition that transportation or infrastructure improvements can have longer-term catalytic impacts economic productivity, which are in addition to the direct, indirect, or induced household spending ...

  18. Influence of RNA Polymerase II Catalytic Activity on Transcription Start Site Selection†

    E-Print Network [OSTI]

    Jin, Huiyan

    2015-08-01

    catalytic activity influences the first step of gene expression, transcription initiation, in Saccharomyces cerevisiae. My dissertation focuses on the mechanisms by which Pol II activity defects contribute to transcription start site (TSS) selection...

  19. Calibration and performance of a selective catalytic reduction (SCR) bench rig for NOx? emissions control

    E-Print Network [OSTI]

    Castro Galnares, SebastiŠn (Castro Galnares Wright Paz)

    2008-01-01

    A laboratory test rig was designed and built to easily test SCR (Selective Catalytic Reduction) technology. Equipped with three 6 kW heaters, connections for liquid N2 and an assortment of test gases, and a connection with ...

  20. Comparison of Gas Catalytic and Electric Infrared Performance for Industrial Applications†

    E-Print Network [OSTI]

    Eshraghi, R. R.; Welch, D. E.

    1999-01-01

    were conducted to evaluate and compare the performance of electric and gas catalytic infrared for the aforementioned applications. The data obtained from the tests were used to calculate the process efficiency of the respective technologies for each...

  1. Treatment of activated carbon to enhance catalytic activity for reduction of nitric oxide with ammonia

    SciTech Connect (OSTI)

    Ku, B.J.; Rhee, H.K. (Seoul National Univ. (Korea, Republic of). Dept. of Chemical Engineering); Lee, J.K.; Park, D. (Korea Inst. of Science and Technology, Seoul (Korea, Republic of))

    1994-11-01

    Catalytic activity of activated carbon treated with various techniques was examined in a fixed bed reactor for the reduction of nitric oxide with ammonia at 150 C. Activated carbon derived from coconut shell impregnated with an aqueous solution of ammonium sulfate, further treated with sulfuric acid, dried at 120 C, and then heated in an inert gas stream at 400 C, showed the highest catalytic activity within the range of experimental conditions. The enhancement of catalytic activity of modified activated carbon could be attributed to the increase in the amount of oxygen function groups which increased the adsorption site for ammonia. Catalytic activity of activated carbons depended on the surface area and the oxygen content as well.

  2. Bipolar Electrochemical Mechanism for the Propulsion of Catalytic Nanomotors in Hydrogen Peroxide Solutions

    E-Print Network [OSTI]

    Bipolar Electrochemical Mechanism for the Propulsion of Catalytic Nanomotors in Hydrogen Peroxide the bipolar electrochemical propulsion mechanism for bimetallic nanorods. Introduction Catalyic molecular nonbiological schemes for making micro/nanoscale ma- chines involve externally applied magnetic2 or electrical

  3. Reaction kinetics of olefin saturation in the hydrodesulfurization of fluid catalytic cracked naphtha†

    E-Print Network [OSTI]

    Schumann, Brian Herbert

    1995-01-01

    U.S. governmental agencies are calling for strict environmental regulations on the quality of gasoline. Fluid catalytic cracked naphtha is an important blending component of the gasoline pool. The majority of the sulfur in the gasoline pool comes...

  4. MŲbius transformation for left-derivative quaternion holomorphic functions

    E-Print Network [OSTI]

    Sergio Giardino

    2015-08-08

    Holomorphic quaternion functions only admit affine functions; thus, the M\\"obius transformation for these functions, which we call quaternionic holomorphic transformation (QHT), only comprises similarity transformations. We determine a general group $\\mathsf{X}$ which has the group $\\mathsf{G}$ of QHT as a particular case. Furthermore, we observe that the M\\"obius group and the Heisenberg group may be obtained by making $\\mathsf{X}$ more symmetric. We provide matrix representations for the group $\\mathsf{X}$ and for its algebra $\\mathfrak{x}$. The Lie algebra is neither simple nor semi-simple, and so it is not classified among the classical Lie algebras. They prove that the group $\\mathsf{G}$ comprises $\\mathsf{SU}(2,\\mathbb{C})$ rotations, dilations and translations. The only fixed point of the QHT is located at infinity, and the QHT does not admit a cross-ratio. Physical applications are addressed at the conclusion.

  5. Grid Transformation Workshop Results Grid Transformation Workshop Results 2 April 2012

    E-Print Network [OSTI]

    Grid Transformation Workshop Results April 2012 #12;Grid Transformation Workshop Results 2 April 2012 Grid Transformation Workshop Results plications. We will explore the basics of data modeling. Each approach will be evaluated with the following criteria: feasibility, dependability, security

  6. Fuel-Flexible, Low-Emissions Catalytic Combustor for Opportunity Fuels

    SciTech Connect (OSTI)

    2009-11-01

    Precision Combustion, Inc. will develop a unique, fuel-flexible Rich Catalytic Lean-Burn (RCLģ) injector with catalytic combustor capable of enabling ultralow-emission, lean premixed combustion of a wide range of gaseous opportunity fuels. This will broaden the range of opportunity fuels that can be utilized to include low- and ultralow-Btu gases, such as digester and blast furnace gases, and fuels containing reactive species, such as refinery, wellhead, and industrial byproduct gases.

  7. Low-temperature catalytic gasification of wet industrial wastes

    SciTech Connect (OSTI)

    Elliott, D C; Neuenschwander, G G; Baker, E G; Sealock, Jr, L J; Butner, R S

    1991-04-01

    Bench-scale reactor tests are in progress at Pacific Northwest Laboratory to develop a low-temperature, catalytic gasification system. The system, licensed under the trade name Thermochemical Environmental Energy System (TEES{reg sign}), is designed for treating a wide variety of feedstocks ranging from dilute organics in water to waste sludges from food processing. This report describes a test program which used a continuous-feed tubular reactor. This test program is an intermediate stage in the process development. The reactor is a laboratory-scale version of the commercial concept as currently envisioned by the process developers. An energy benefit and economic analysis was also completed on the process. Four conceptual commercial installations of the TEES process were evaluated for three food processing applications and one organic chemical manufacturing application. Net energy production (medium-Btu gas) was achieved in all four cases. The organic chemical application was found to be economically attractive in the present situation. Based on sensitivity studies included in the analysis, the three food processing cases will likely become attractive in the near future as waste disposal regulations tighten and disposal costs increase. 21 refs., 2 figs., 9 tabs.

  8. New Catalytic DNA Biosensors for Radionuclides and Metal ion

    SciTech Connect (OSTI)

    Yi Lu

    2008-03-01

    We aim to develop new DNA biosensors for simultaneous detection and quantification of bioavailable radionuclides, such as uranium, technetium, and plutonium, and metal contaminants, such as lead, chromium, and mercury. The sensors will be highly sensitive and selective. They will be applied to on-site, real-time assessment of concentration, speciation, and stability of the individual contaminants before and during bioremediation, and for long-term monitoring of DOE contaminated sites. To achieve this goal, we have employed a combinatorial method called ďin vitro selectionĒ to search from a large DNA library (~ 1015 different molecules) for catalytic DNA molecules that are highly specific for radionuclides or other metal ions through intricate 3-dimensional interactions as in metalloproteins. Comprehensive biochemical and biophysical studies have been performed on the selected DNA molecules. The findings from these studies have helped to elucidate fundamental principles for designing effective sensors for radionuclides and metal ions. Based on the study, the DNA have been converted to fluorescent or colorimetric sensors by attaching to it fluorescent donor/acceptor pairs or gold nanoparticles, with 11 part-per-trillion detection limit (for uranium) and over million fold selectivity (over other radionuclides and metal ions tested). Practical application of the biosensors for samples from the Environmental Remediation Sciences Program (ERSP) Field Research Center (FRC) at Oak Ridge has also been demonstrated.

  9. Structural Basis for Catalytic Activation of a Serine Recombinase

    SciTech Connect (OSTI)

    Keenholtz, Ross A.; Rowland, Sally-J.; Boocock, Martin R.; Stark, W. Marshall; Rice, Phoebe A. (Glasgow); (UC)

    2014-10-02

    Sin resolvase is a site-specific serine recombinase that is normally controlled by a complex regulatory mechanism. A single mutation, Q115R, allows the enzyme to bypass the entire regulatory apparatus, such that no accessory proteins or DNA sites are required. Here, we present a 1.86 {angstrom} crystal structure of the Sin Q115R catalytic domain, in a tetrameric arrangement stabilized by an interaction between Arg115 residues on neighboring subunits. The subunits have undergone significant conformational changes from the inactive dimeric state previously reported. The structure provides a new high-resolution view of a serine recombinase active site that is apparently fully assembled, suggesting roles for the conserved active site residues. The structure also suggests how the dimer-tetramer transition is coupled to assembly of the active site. The tetramer is captured in a different rotational substate than that seen in previous hyperactive serine recombinase structures, and unbroken crossover site DNA can be readily modeled into its active sites.

  10. Catalytic Growth of Macroscopic Carbon Nanofibers Bodies with Activated Carbon

    SciTech Connect (OSTI)

    Abdullah, N.; Muhammad, I. S.; Hamid, S. B. Abd.; Rinaldi, A.; Su, D. S.; Schlogl, R.

    2009-06-01

    Carbon-carbon composite of activated carbon and carbon nanofibers have been synthesized by growing Carbon nanofiber (CNF) on Palm shell-based Activated carbon (AC) with Ni catalyst. The composites are in an agglomerated shape due to the entanglement of the defective CNF between the AC particles forming a macroscopic body. The macroscopic size will allow the composite to be used as a stabile catalyst support and liquid adsorbent. The preparation of CNT/AC nanocarbon was initiated by pre-treating the activated carbon with nitric acid, followed by impregnation of 1 wt% loading of nickel (II) nitrate solutions in acetone. The catalyst precursor was calcined and reduced at 300 deg. C for an hour in each step. The catalytic growth of nanocarbon in C{sub 2}H{sub 4}/H{sub 2} was carried out at temperature of 550 deg. C for 2 hrs with different rotating angle in the fluidization system. SEM and N{sub 2} isotherms show the level of agglomeration which is a function of growth density and fluidization of the system. The effect of fluidization by rotating the reactor during growth with different speed give a significant impact on the agglomeration of the final CNF/AC composite and thus the amount of CNFs produced. The macrostructure body produced in this work of CNF/AC composite will have advantages in the adsorbent and catalyst support application, due to the mechanical and chemical properties of the material.

  11. Constraints on Supersymmetric Models from Catalytic Primordial Nucleosynthesis of Beryllium

    E-Print Network [OSTI]

    Maxim Pospelov; Josef Pradler; Frank Daniel Steffen

    2008-10-27

    The catalysis of nuclear reactions by negatively charged relics leads to increased outputs of primordial ^6Li and ^9Be. In combination with observational constraints on the primordial fractions of ^6Li and ^9Be, this imposes strong restrictions on the primordial abundance and the lifetime of charged relics. We analyze the constraints from the catalysis of ^9Be on supersymmetric models in which the gravitino is the lightest supersymmetric particle and a charged slepton--such as the lighter stau--the next-to-lightest supersymmetric particle (NLSP). Barring the special cases in which the primordial fraction of the slepton NLSP is significantly depleted, we find that the ^9Be data require a slepton NLSP lifetime of less than 6x10^3 seconds. We also address the issue of the catalytic destruction of ^6Li and ^9Be by late forming bound states of protons with negatively charged relics finding that it does not lead to any significant modification of the limit on the slepton lifetime.

  12. Synthesis and catalytic activity of polysaccharide templated nanocrystalline sulfated zirconia

    SciTech Connect (OSTI)

    Sherly, K. B.; Rakesh, K.

    2014-01-28

    Nanoscaled materials are of great interest due to their unique enhanced optical, electrical and magnetic properties. Sulfate-promoted zirconia has been shown to exhibit super acidic behavior and high activity for acid catalyzed reactions. Nanocrystalline zirconia was prepared in the presence of polysaccharide template by interaction between ZrOCl{sub 2}?8H{sub 2}O and chitosan template. The interaction was carried out in aqueous phase, followed by the removal of templates by calcination at optimum temperature and sulfation. The structural and textural features were characterized by powder XRD, TG, SEM and TEM. XRD patterns showed the peaks of the diffractogram were in agreement with the theoretical data of zirconia with the catalytically active tetragonal phase and average crystalline size of the particles was found to be 9 nm, which was confirmed by TEM. TPD using ammonia as probe, FTIR and BET surface area analysis were used for analyzing surface features like acidity and porosity. The BET surface area analysis showed the sample had moderately high surface area. FTIR was used to find the type species attached to the surface of zirconia. UV-DRS found the band gap of the zirconia was found to be 2.8 eV. The benzylation of o-xylene was carried out batchwise in atmospheric pressure and 433K temperature using sulfated zirconia as catalyst.

  13. The Generalized Stieltjes Transform and Its Inverse

    E-Print Network [OSTI]

    John H. Schwarz

    2004-05-18

    The generalized Stieltjes transform (GST) is an integral transform that depends on a parameter $\\rho > 0$. In previous work a convenient form of the inverse transformation was derived for the case $\\rho = 3/2$. This paper generalizes that result to all $\\rho > 0$. It is a well-known fact that the GST can be formulated as an iterated Laplace transform, and that therefore its inverse can be expressed as an iterated inverse Laplace transform. The form of the inverse transform derived here is a one-dimensional integral that is considerably simpler.

  14. Positional effects of hydroxy groups on catalytic activity of proton-responsive half-sandwich Cp*Iridium(III) complexes

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

    Suna, Yuki; Fujita, Etsuko; Ertem, Mehmed Z.; Wang, Wan-Hui; Kambayashi, Hide; Manaka, Yuichi; Muckerman, James T.; Himeda, Yuichiro

    2014-11-12

    Proton-responsive half-sandwich Cp*Ir(III) complexes possessing a bipyridine ligand with two hydroxy groups at the 3,3'-, 4,4'-, 5,5'- or 6,6'-positions (3DHBP, 4DHBP, 5DHBP, or 6DHBP) were systematically investigated. UV-vis titration data provided average pK a values of the hydroxy groups on the ligands. Both hydroxy groups were found to deprotonate in the pH 4.6Ė5.6 range for the 4Ė6DHBP complexes. One of the hydroxy groups of the 3DHBP complex exhibited the low pKa value of more†Ľto an elevated pKa value of ~13.6 for the second deprotonation step. The crystal structures of the 4Ė and 6DHBP complexes obtained from basic aqueous solutions revealed their deprotonated forms. The intramolecular hydrogen bond in the 3DHBP complex was also observed in the crystal structures. The catalytic activities of these complexes in aqueous phase reactions, at appropriate pH, for hydrogenation of carbon dioxide (pH 8.5), dehydrogenation of formic acid (pH 1.8), transfer hydrogenation reactions using formic acid/formate as a hydrogen source (pH 7.2 and 2.6) were investigated to compare the positional effects of the hydroxy groups. The 4Ė and 6DHBP complexes exhibited remarkably enhanced catalytic activities under basic conditions because of the resonance effect of the strong electrondonating oxyanions, whereas the 5DHBP complex exhibited negligible activity despite the presence of electron-donating groups. The 3DHBP complex exhibited relatively high catalytic activity at low pH owing to the one strong electron-donating oxyanion group stabilized by the intramolecular hydrogen bond. DFT calculations were employed to study the mechanism of CO? hydrogenation by the 4DHBP and 6DHBP complexes, and comparison of the activation free energies of the H? heterolysis and CO? insertion steps indicated that H? heterolysis is the rate-determining step for both complexes. The presence of a pendent base in the 6DHBP complex was found to facilitate the rate-determining step, and renders 6DHBP a more effective catalyst for formate production.ę†less

  15. Positional effects of hydroxy groups on catalytic activity of proton-responsive half-sandwich Cp*Iridium(III) complexes

    SciTech Connect (OSTI)

    Suna, Yuki; Fujita, Etsuko; Ertem, Mehmed Z.; Wang, Wan-Hui; Kambayashi, Hide; Manaka, Yuichi; Muckerman, James T.; Himeda, Yuichiro

    2014-11-12

    Proton-responsive half-sandwich Cp*Ir(III) complexes possessing a bipyridine ligand with two hydroxy groups at the 3,3'-, 4,4'-, 5,5'- or 6,6'-positions (3DHBP, 4DHBP, 5DHBP, or 6DHBP) were systematically investigated. UV-vis titration data provided average pK a values of the hydroxy groups on the ligands. Both hydroxy groups were found to deprotonate in the pH 4.6Ė5.6 range for the 4Ė6DHBP complexes. One of the hydroxy groups of the 3DHBP complex exhibited the low pKa value of < 0.4 because the deprotonation is facilitated by the strong intramolecular hydrogen bond formed between the generated oxyanion and the remaining hydroxy group, which in turn leads to an elevated pKa value of ~13.6 for the second deprotonation step. The crystal structures of the 4Ė and 6DHBP complexes obtained from basic aqueous solutions revealed their deprotonated forms. The intramolecular hydrogen bond in the 3DHBP complex was also observed in the crystal structures. The catalytic activities of these complexes in aqueous phase reactions, at appropriate pH, for hydrogenation of carbon dioxide (pH 8.5), dehydrogenation of formic acid (pH 1.8), transfer hydrogenation reactions using formic acid/formate as a hydrogen source (pH 7.2 and 2.6) were investigated to compare the positional effects of the hydroxy groups. The 4Ė and 6DHBP complexes exhibited remarkably enhanced catalytic activities under basic conditions because of the resonance effect of the strong electrondonating oxyanions, whereas the 5DHBP complex exhibited negligible activity despite the presence of electron-donating groups. The 3DHBP complex exhibited relatively high catalytic activity at low pH owing to the one strong electron-donating oxyanion group stabilized by the intramolecular hydrogen bond. DFT calculations were employed to study the mechanism of CO? hydrogenation by the 4DHBP and 6DHBP complexes, and comparison of the activation free energies of the H? heterolysis and CO? insertion steps indicated that H? heterolysis is the rate-determining step for both complexes. The presence of a pendent base in the 6DHBP complex was found to facilitate the rate-determining step, and renders 6DHBP a more effective catalyst for formate production.

  16. Catalytic multi-stage process for hydroconversion and refining hydrocarbon feeds

    DOE Patents [OSTI]

    Comolli, Alfred G. (Yardley, PA); Lee, Lap-Keung (Cranbury, NJ)

    2001-01-01

    A multi-stage catalytic hydrogenation and hydroconversion process for heavy hydrocarbon feed materials such as coal, heavy petroleum fractions, and plastic waste materials. In the process, the feedstock is reacted in a first-stage, back-mixed catalytic reactor with a highly dispersed iron-based catalyst having a powder, gel or liquid form. The reactor effluent is pressure-reduced, vapors and light distillate fractions are removed overhead, and the heavier liquid fraction is fed to a second stage back-mixed catalytic reactor. The first and second stage catalytic reactors are operated at 700-850.degree. F. temperature, 1000-3500 psig hydrogen partial pressure and 20-80 lb./hr per ft.sup.3 reactor space velocity. The vapor and light distillates liquid fractions removed from both the first and second stage reactor effluent streams are combined and passed to an in-line, fixed-bed catalytic hydrotreater for heteroatom removal and for producing high quality naphtha and mid-distillate or a full-range distillate product. The remaining separator bottoms liquid fractions are distilled at successive atmospheric and vacuum pressures, low and intermediate-boiling hydrocarbon liquid products are withdrawn, and heavier distillate fractions are recycled and further upgraded to provide additional low-boiling hydrocarbon liquid products. This catalytic multistage hydrogenation process provides improved flexibility for hydroprocessing the various carbonaceous feedstocks and adjusting to desired product structures and for improved economy of operations.

  17. PILOT-SCALE EVALUATION OF THE IMPACT OF SELECTIVE CATALYTIC REDUCTION FOR NOx ON MERCURY SPECIATION

    SciTech Connect (OSTI)

    Dennis L. Laudal; John H. Pavlish; Kevin C. Galbreath; Jeffrey S. Thompson; Gregory F. Weber; Everett Sondreal

    2000-12-01

    Full-scale tests in Europe and bench-scale tests in the United States have indicated that the catalyst, normally vanadium/titanium metal oxide, used in the selective catalytic reduction (SCR) of NO{sub x}, may promote the formation of Hg{sup 2+} and/or particulate-bound mercury (Hg{sub p}). To investigate the impact of SCR on mercury speciation, pilot-scale screening tests were conducted at the Energy & Environmental Research Center. The primary research goal was to determine whether the catalyst or the injection of ammonia in a representative SCR system promotes the conversion of Hg{sup 0} to Hg{sup 2+} and/or Hg{sub p} and, if so, which coal types and parameters (e.g., rank and chemical composition) affect the degree of conversion. Four different coals, three eastern bituminous coals and a Powder River Basin (PRB) subbituminous coal, were tested. Three tests were conducted for each coal: (1) baseline, (2) NH{sub 3} injection, and (3) SCR of NO{sub x}. Speciated mercury, ammonia slip, SO{sub 3}, and chloride measurements were made to determine the effect the SCR reactor had on mercury speciation. It appears that the impact of SCR of NO{sub x} on mercury speciation is coal-dependent. Although there were several confounding factors such as temperature and ammonia concentrations in the flue gas, two of the eastern bituminous coals showed substantial increases in Hg{sub p} at the inlet to the ESP after passing through an SCR reactor. The PRB coal showed little if any change due to the presence of the SCR. Apparently, the effects of the SCR reactor are related to the chloride, sulfur and, possibly, the calcium content of the coal. It is clear that additional work needs to be done at the full-scale level.

  18. Generalized Jordan-Wigner Transformations

    SciTech Connect (OSTI)

    Batista, C. D.; Ortiz, G.

    2001-02-05

    We introduce a new spin-fermion mapping, for arbitrary spin S generating the SU(2) group algebra, that constitutes a natural generalization of the Jordan-Wigner transformation for S=1/2. The mapping, valid for regular lattices in any spatial dimension d , serves to unravel hidden symmetries. We illustrate the power of the transformation by finding exact solutions to lattice models previously unsolved by standard techniques. We also show the existence of the Haldane gap in S=1 bilinear nearest-neighbor Heisenberg spin chains and discuss the relevance of the mapping to models of strongly correlated electrons. Moreover, we present a general spin-anyon mapping for the case d{<=}2 .

  19. Generalized Jordan-Wigner Transformations

    E-Print Network [OSTI]

    C. D. Batista; G. Ortiz

    2000-08-25

    We introduce a new spin-fermion mapping, for arbitrary spin $S$ generating the SU(2) group algebra, that constitutes a natural generalization of the Jordan-Wigner transformation for $S=1/2$. The mapping, valid for regular lattices in any spatial dimension $d$, serves to unravel hidden symmetries in one representation that are manifest in the other. We illustrate the power of the transformation by finding exact solutions to lattice models previously unsolved by standard techniques. We also present a proof of the existence of the Haldane gap in $S=$1 bilinear nearest-neighbors Heisenberg spin chains and discuss the relevance of the mapping to models of strongly correlated electrons. Moreover, we present a general spin-anyon mapping for the case $d \\leq 2$.

  20. Combined in Situ X-ray absorption and diffuse reflectance infraredspectroscopy: An attractive tool for catalytic investigations

    SciTech Connect (OSTI)

    Marinkovic, N.S.; Ehrlich, S.; Wang, Q.; Barrio, L.; Khalid, S.; et.al.

    2010-11-24

    Catalysis investigations are often followed in a range of spectroscopic techniques. While diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) can be done on a bench-top instrument, X-ray absorption spectroscopy (XAS) techniques, such as extended X-ray absorption fine structure (EXAFS) and X-ray absorption near-edge structure (XANES) require synchrotron light. In order to ensure the same conditions during in situ catalysis for each method, a combined XAS/DRIFTS has been developed at beamline X18A at the National Synchrotron Light Source, Brookhaven National Laboratory. A rapid-scan FTIR spectrometer capable of both mid- and far-infrared measurements is equipped with an arm to redirect the IR beam outside the spectrometer. An in situ reaction chamber, equipped with glassy carbon windows for X-ray light and a KBr window for IR light passage is installed firmly on the arm. The reaction cell can be heated to 600 C and allows passage of gases through the catalyst so that both XAS and DRIFTS techniques can be done simultaneously in controlled environment conditions. Together with a fast-moving monochromator for quick-EXAFS and mass-spectrometric residual gas analysis, this new tool is a powerful method for testing catalytic reactions in real time.

  1. Bubbling bed catalytic hydropyrolysis process utilizing larger catalyst particles and smaller biomass particles featuring an anti-slugging reactor

    DOE Patents [OSTI]

    Marker, Terry L; Felix, Larry G; Linck, Martin B; Roberts, Michael J

    2014-09-23

    This invention relates to a process for thermochemically transforming biomass or other oxygenated feedstocks into high quality liquid hydrocarbon fuels. In particular, a catalytic hydropyrolysis reactor, containing a deep bed of fluidized catalyst particles is utilized to accept particles of biomass or other oxygenated feedstocks that are significantly smaller than the particles of catalyst in the fluidized bed. The reactor features an insert or other structure disposed within the reactor vessel that inhibits slugging of the bed and thereby minimizes attrition of the catalyst. Within the bed, the biomass feedstock is converted into a vapor-phase product, containing hydrocarbon molecules and other process vapors, and an entrained solid char product, which is separated from the vapor stream after the vapor stream has been exhausted from the top of the reactor. When the product vapor stream is cooled to ambient temperatures, a significant proportion of the hydrocarbons in the product vapor stream can be recovered as a liquid stream of hydrophobic hydrocarbons, with properties consistent with those of gasoline, kerosene, and diesel fuel. Separate streams of gasoline, kerosene, and diesel fuel may also be obtained, either via selective condensation of each type of fuel, or via later distillation of the combined hydrocarbon liquid.

  2. Conformal Gauge Transformations in Thermodynamics

    E-Print Network [OSTI]

    A. Bravetti; C. S. Lopez-Monsalvo; F. Nettel

    2015-06-23

    In this work we consider conformal gauge transformations of the geometric structure of thermodynamic fluctuation theory. In particular, we show that the Thermodynamic Phase Space is naturally endowed with a non-integrable connection, defined by all those processes that annihilate the Gibbs 1-form, i.e. reversible processes. Therefore the geometry of reversible processes is invariant under re-scalings, that is, it has a conformal gauge freedom. Interestingly, as a consequence of the non-integrability of the connection, its curvature is not invariant under conformal gauge transformations and, therefore, neither is the associated pseudo-Riemannian geometry. We argue that this is not surprising, since these two objects are associated with irreversible processes. Moreover, we provide the explicit form in which all the elements of the geometric structure of the Thermodynamic Phase Space change under a conformal gauge transformation. As an example, we revisit the change of the thermodynamic representation and consider the resulting change between the two metrics on the Thermodynamic Phase Space which induce Weinhold's energy metric and Ruppeiner's entropy metric. As a by-product we obtain a proof of the well-known conformal relation between Weinhold's and Ruppeiner's metrics along the equilibrium directions. Finally, we find interesting properties of the almost para-contact structure and of its eigenvectors which may be of physical interest.

  3. Application of Fourier transform infrared spectroscopy to silica diagenesis: The opal-A to opal-CT transformation

    SciTech Connect (OSTI)

    Rice, S.B.; Freund, H.; Huang, W.L.; Clouse, J.A.; Isaacs, C.M.

    1995-10-02

    An important goal in silica diagenesis research is to understand the kinetics of opal transformation from noncrystalline opal-A to the disordered silica polymorph opal-CT. Because the conventional technique for monitoring the transformation, powder X-ray diffraction (XRD), is applicable only to phases with long-range order, the authors used Fourier transform infrared spectroscopy (FTIR) to monitor the transformation. They applied this technique, combined with XRD and TEM, to experimental run products and natural opals from the Monterey Formation and from siliceous deposits in the western Pacific Ocean. Using a ratio of two infrared absorption intensities ({omega} = I{sub 472 cm{sup {minus}1}}/I{sub 500 cm{sup {minus}1}}), the relative proportions of opal-A and opal-CT can be determined. The progress of the transformation is marked by changes in slope of {omega} vs. depth or time when a sufficient stratigraphic profile is available. There are three stages in the opal-A to opal-CT reaction: (1) opal-A dissolution; (2) opal-CT precipitation, whose end point is marked by completion of opal-A dissolution; and (3) opal-CT ordering, during which tridymite stacking is eliminated in favor of crystobalite stacking.

  4. Harmonic Wavelet Transform and Image Approximation

    E-Print Network [OSTI]

    Zhang, Zhihua; Saito, Naoki

    2010-01-01

    DOI 10.1007/s10851-010-0202-x Harmonic Wavelet Transform andwe approximate f by a harmonic function u such that thebanks. We call this the Harmonic Wavelet Transform (HWT).

  5. Counter urban transformation in Istanbul Beyoglu

    E-Print Network [OSTI]

    Uzunyayla, Sakine Dicle

    2014-01-01

    Urban transformation has become central to the Turkish government's neo-liberal program of commercial development for Istanbul. These transformations have provoked public discontent and passionate responses, the largest ...

  6. Modelling of Simultaneous Transformations in Steels

    E-Print Network [OSTI]

    Chen, Jiawen

    The microstructure of a steel is often developed by solid-state transformation from austenite. The major transformation products are allotriomorphic ferrite, pearlite, Widmanstatten ferrite, bainite and martensite, differentiated by morphological...

  7. Transforms for prediction residuals in video coding

    E-Print Network [OSTI]

    Kam??l?, Fatih

    2010-01-01

    Typically the same transform, the 2-D Discrete Cosine Transform (DCT), is used to compress both image intensities in image coding and prediction residuals in video coding. Major prediction residuals include the motion ...

  8. Solar Energy Technologies Program: Market Transformation

    SciTech Connect (OSTI)

    2009-10-26

    Fact sheet summarizing the goals and activities of the DOE Solar Energy Technologies Program efforts within its market transformation subprogram

  9. Tunable fractional-order Fourier transformer

    SciTech Connect (OSTI)

    Malyutin, A A [A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

    2006-01-31

    A fractional two-dimensional Fourier transformer whose orders are tuned by means of optical quadrupoles is described. It is shown that in the optical scheme considered, the Fourier-transform order a element of [0,1] in one of the mutually orthogonal planes corresponds to the transform order (2-a) in another plane, i.e., to inversion and inverse Fourier transform of the order a. (laser modes and beams)

  10. ADVANCED BYPRODUCT RECOVERY: DIRECT CATALYTIC REDUCTION OF SO2 TO ELEMENTAL SULFUR

    SciTech Connect (OSTI)

    Robert S. Weber

    1999-05-01

    Arthur D. Little, Inc., together with its commercialization partner, Engelhard Corporation, and its university partner Tufts, investigated a single-step process for direct, catalytic reduction of sulfur dioxide from regenerable flue gas desulfurization processes to the more valuable elemental sulfur by-product. This development built on recently demonstrated SO{sub 2}-reduction catalyst performance at Tufts University on a DOE-sponsored program and is, in principle, applicable to processing of regenerator off-gases from all regenerable SO{sub 2}-control processes. In this program, laboratory-scale catalyst optimization work at Tufts was combined with supported catalyst formulation work at Engelhard, bench-scale supported catalyst testing at Arthur D. Little and market assessments, also by Arthur D. Little. Objectives included identification and performance evaluation of a catalyst which is robust and flexible with regard to choice of reducing gas. The catalyst formulation was improved significantly over the course of this work owing to the identification of a number of underlying phenomena that tended to reduce catalyst selectivity. The most promising catalysts discovered in the bench-scale tests at Tufts were transformed into monolith-supported catalysts at Engelhard. These catalyst samples were tested at larger scale at Arthur D. Little, where the laboratory-scale results were confirmed, namely that the catalysts do effectively reduce sulfur dioxide to elemental sulfur when operated under appropriate levels of conversion and in conditions that do not contain too much water or hydrogen. Ways to overcome those limitations were suggested by the laboratory results. Nonetheless, at the end of Phase I, the catalysts did not exhibit the very stringent levels of activity or selectivity that would have permitted ready scale-up to pilot or commercial operation. Therefore, we chose not to pursue Phase II of this work which would have included further bench-scale testing, scale-up, pilot-scale (0.5 MW{sub e}) testing at conditions representative of various regenerable SO{sub 2}-control systems, preparation of a commercial process design, and development of a utility-scale demonstration plan.

  11. Integrating catalytic coal gasifiers with solid oxide fuel cells

    SciTech Connect (OSTI)

    Siefert, N.; Shamsi, A.; Shekhawat, D.; Berry, D.

    2010-01-01

    A review was conducted for coal gasification technologies that integrate with solid oxide fuel cells (SOFC) to achieve system efficiencies near 60% while capturing and sequestering >90% of the carbon dioxide [1-2]. The overall system efficiency can reach 60% when a) the coal gasifier produces a syngas with a methane composition of roughly 25% on a dry volume basis, b) the carbon dioxide is separated from the methane-rich synthesis gas, c) the methane-rich syngas is sent to a SOFC, and d) the off-gases from the SOFC are recycled back to coal gasifier. The thermodynamics of this process will be reviewed and compared to conventional processes in order to highlight where available work (i.e. exergy) is lost in entrained-flow, high-temperature gasification, and where exergy is lost in hydrogen oxidation within the SOFC. The main advantage of steam gasification of coal to methane and carbon dioxide is that the amount of exergy consumed in the gasifier is small compared to conventional, high temperature, oxygen-blown gasifiers. However, the goal of limiting the amount of exergy destruction in the gasifier has the effect of limiting the rates of chemical reactions. Thus, one of the main advantages of steam gasification leads to one of its main problems: slow reaction kinetics. While conventional entrained-flow, high-temperature gasifiers consume a sizable portion of the available work in the coal oxidation, the consumed exergy speeds up the rates of reactions. And while the rates of steam gasification reactions can be increased through the use of catalysts, only a few catalysts can meet cost requirements because there is often significant deactivation due to chemical reactions between the inorganic species in the coal and the catalyst. Previous research into increasing the kinetics of steam gasification will be reviewed. The goal of this paper is to highlight both the challenges and advantages of integrating catalytic coal gasifiers with SOFCs.

  12. Gravity Transform for Input Conditioning in

    E-Print Network [OSTI]

    Paiva, Antůnio R. C.

    Gravity Transform for Input Conditioning in Brain Machine Interfaces Antůnio R. C. Paiva, Josť C. Motivation 2. Methods i. Gravity Transform ii. Modeling and output sensitivity analysis 3. Data Analysis #12;3 Outline 1. Motivation 2. Methods i. Gravity Transform ii. Modeling and output sensitivity analysis 3. Data

  13. Fourier transform channeled spectropolarimetry in the MWIR

    E-Print Network [OSTI]

    Dereniak, Eustace L.

    Fourier transform channeled spectropolarimetry in the MWIR Michael W. Kudenov,1 Nathan A. Hagen, 1 Abstract: A complete Fourier Transform Spectropolarimeter in the MWIR is demonstrated. The channeled and links 1. P. Griffiths and J. D. Haseth, "Fourier Transform Infrared Spectrometry," (John Wiley & Sons

  14. The Fourier Transform -A Primer Hagit Shatkay

    E-Print Network [OSTI]

    Learned, John

    The Fourier Transform - A Primer Hagit Shatkay Department of Computer Science Brown University Providence, Rhode Island 02912 CS-95-37 November 1995 #12;#12;The Fourier Transform { A Primer Hagit Shatkay Department of Computer Science Brown University Providence, RI 02912 1 Introduction The Fourier transform

  15. Quantum arithmetic with the Quantum Fourier Transform

    E-Print Network [OSTI]

    Lidia Ruiz-Perez; Juan Carlos Garcia-Escartin

    2014-11-21

    The Quantum Fourier Transform offers an interesting way to perform arithmetic operations on a quantum computer. We review existing Quantum Fourier Transform adders and multipliers and propose some modifications that extend their capabilities. Among the new circuits, we propose a quantum method to compute the weighted average of a series of inputs in the transform domain.

  16. Birefringent Fourier-transform imaging spectrometer

    E-Print Network [OSTI]

    Harvey, Andy

    Birefringent Fourier-transform imaging spectrometer Andrew Robert Harvey and David William Fletcher.r.Harvey@hw.ac.uk http://www.ece.eps.hw.ac.uk/~arharvey Abstract: Fourier-transform imaging spectrometers offer important, for application in harsh environments, deployment of Fourier-transform instruments based on traditional moving

  17. Transformation texture of allotriomorphic ferrite in steel

    E-Print Network [OSTI]

    Cambridge, University of

    Transformation texture of allotriomorphic ferrite in steel D. W. Kim1 , R. S. Qin1 and H. K. D. H into martensite or bainite are well established because the process by which the parent lattice is transformed within the austenite before its transformation. Keywords: Allotriomorphic ferrite, Steel, Texture, Dual

  18. Data-centric Transformations for Locality Enhancement

    E-Print Network [OSTI]

    Pingali, Keshav K.

    -centric transformations for locality enhancement. We present experimental results on the SGI Octane compar- ingData-centric Transformations for Locality Enhancement Induprakas Kodukula Keshav Pingali September community has developed locality-enhancing program transformations such as loop permutation and tiling

  19. Inversion of the attenuated Radon transform

    E-Print Network [OSTI]

    M√ľnster, Westf√§lische Wilhelms-Universit√§t

    Inversion of the attenuated Radon transform F. Natterer Institut fur Numerische und instrumentelle@math.uni-muenster.de Abstract We derive an exact inversion formula for the attenuated Radon transform. The formula is closely for x 2 IR2, #12; 2 S1 Dax; #12; = 1Z 0 ax + t#12;dt : 1.1 The attenuated Radon transform Ra is de ned

  20. Nonlinear Radon and Fourier Transforms Franois Rouvire

    E-Print Network [OSTI]

    Vallette, Bruno

    Nonlinear Radon and Fourier Transforms FranÁois RouviŤre Universitť de Nice Laboratoire Dieudonnť, of the clas- sical Radon transform on hyperplanes. A function f on Rn can be reconstructed from nonlinear Radon transforms, obtained by integrating f and a ...nite num- ber of multiples x f over a family

  1. Injectivity of Rotation Invariant Windowed Radon Transforms

    E-Print Network [OSTI]

    Biermť, Hermine

    Injectivity of Rotation Invariant Windowed Radon Transforms Hermine Biermīe MAPMO-UMR 6628, D rotation invariant windowed Radon transforms that integrate a func- tion over hyperplanes by using a radial with positive real part , the windowed Radon transform is not injective on functions with a Gaussian decay

  2. Multilinear generalized Radon transforms and point configurations

    E-Print Network [OSTI]

    Grafakos, Loukas

    Multilinear generalized Radon transforms and point configurations Loukas Grafakos, Allan Greenleaf, Alex Iosevich and Eyvindur Palsson Abstract. We study multilinear generalized Radon transforms using for the results in [7]. 1. Introduction Linear generalized Radon transforms are operators of the form (1.1) Rf

  3. Mechanisms of cellular transformation by carcinogenic agents

    SciTech Connect (OSTI)

    Grunberger, D.; Goff, S.P.

    1987-01-01

    This book contains 14 chapters. Some of the chapter titles are: DNA Modification by Chemical Carcinogens; Role of DNA Lesions and Repair in the Transformation of Human Cells; The Induction and Regulation of Radiogenic Transformation In Vitro: Cellular and Molecular Mechanisms; Cellular Transformation by Adenoviruses; and The fos Gene.

  4. M, N -Adhesive Transformation Systems (Long Version)

    E-Print Network [OSTI]

    Habel, Annegret

    M, N -Adhesive Transformation Systems (Long Version) Annegret Habel1 and Detlef Plump2 1 Carl von.plump@york.ac.uk Draft: October 1, 2012 Abstract. The categorical framework of M-adhesive transformation systems does with graphs, however, and are commonly used in graph transformation languages. In this paper, we generalise M-adhesive

  5. Transforming and Refining Abstract Constraint Specifications

    E-Print Network [OSTI]

    Walsh, Toby

    Transforming and Refining Abstract Constraint Specifications Alan M. Frisch1 , Brahim Hnich2 , Ian choose model transformations to reduce greatly the amount of effort that is required to solve a problem by systematic search. It is a consid- erable challenge to automate such transformations. A problem may be viewed

  6. LAPPED TRANSFORMS Ricardo L. de Queiroz

    E-Print Network [OSTI]

    de Queiroz, Ricardo L.

    LAPPED TRANSFORMS Ricardo L. de Queiroz Digital Imaging Technology Center Xerox Corporation queiroz transforms. It is a subject that has been extensively studied making available a large number of papers and books. This is mostly true because of the direct correspondence among lapped transforms, lter banks

  7. LAPPED TRANSFORMS Ricardo L. de Queiroz

    E-Print Network [OSTI]

    de Queiroz, Ricardo L.

    LAPPED TRANSFORMS Ricardo L. de Queiroz Advanced Color Imaging Xerox Corporation queiroz@wrc.xerox.com 0.1 Introduction The idea of a lapped transform (LT, for short) maintaining orthogonality and non with the blocking artifacts so common in traditional block transform coding of images. The idea was to extend

  8. A Computational Theory of Enterprise Transformation

    E-Print Network [OSTI]

    Serban, Nicoleta

    approach to enterprise transformation was to turn IBM into a market- driven rather than internally focusedA Computational Theory of Enterprise Transformation Zhongyuan Yu, William B. Rouse,* and Nicoleta THEORY OF ENTERPRISE TRANSFORMATION Received 13 August 2010; Revised 20 December 2010; Accepted 20

  9. A programmable Fresnel transform pulse shaper

    E-Print Network [OSTI]

    Purdue University

    A programmable Fresnel transform pulse shaper G. Mīinguez-Vega1, J.D. McKinney2 and A.M. Weiner2 1@purdue.edu Abstract: We demonstrate the first reprogrammable Fresnel transform pulse shaper based on a modified direct a free-space Fresnel transform which causes quadratic dispersion of the output temporal waveform. When

  10. Institute for Atom-Efficient Chemical Transformations Energy...

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

    will involve synthesis, characterization, and catalytic reactor testing of new materials. The Postdoctoral Appointee will be working with a larger group from Argonne and...

  11. Ash Determinations

    E-Print Network [OSTI]

    Unknown

    2011-08-17

    Germination of Ashe juniper seed were compared in a controlled environment at different levels of fruit maturation, lengths of storage, and seed stratification to determine potential germination. Annual mean germination varied by an order...

  12. Towards Sustainable Communities: Transitions and Transformations in Environmental Policy

    E-Print Network [OSTI]

    Ghosh, Kaustuv

    2010-01-01

    Transformations in Environmental Policy Daniel A. MazmanianTransformations in Environmental Policy (2 ed). Cambridge,Transformation in Environmental Policy is the second edition

  13. A Superconducting transformer system for high current cable testing

    E-Print Network [OSTI]

    Godeke, A.

    2010-01-01

    A Superconducting Transformer System for High Current CableDC) superconducting transformer system for the high currentsuperconducting cables. The transformer consists of a core-

  14. Cauchy transforms of measures viewed as some functionals of Fourier transforms #

    E-Print Network [OSTI]

    Jurek, Zbigniew J.

    Cauchy transforms of measures viewed as some functionals of Fourier transforms # Zbigniew J. Jurek Urbanik ABSTRACT. The Cauchy transform of a positive measure plays an impor≠ tant role in complex analysis and more recently in so≠called free probability. We show here that the Cauchy transform restricted

  15. Cauchy transforms of measures viewed as some functionals of Fourier transforms

    E-Print Network [OSTI]

    Jurek, Zbigniew J.

    Cauchy transforms of measures viewed as some functionals of Fourier transforms Zbigniew J. Jurek Urbanik ABSTRACT. The Cauchy transform of a positive measure plays an impor- tant role in complex analysis and more recently in so-called free probability. We show here that the Cauchy transform restricted

  16. Multilinear generalized Radon transforms and point configurations

    E-Print Network [OSTI]

    Grafakos, Loukas; Iosevich, Alex; Palsson, Eyvindur

    2012-01-01

    We study multilinear generalized Radon transforms using a graph-theoretic paradigm that includes the widely studied linear case. These provide a general mechanism to study Falconer-type problems involving $(k+1)$-point configurations in geometric measure theory, with $k \\ge 2$, including the distribution of simplices, volumes and angles determined by the points of fractal subsets $E \\subset {\\Bbb R}^d$, $d \\ge 2$. If $T_k(E)$ denotes the set of noncongruent $(k+1)$-point configurations determined by $E$, we show that if the Hausdorff dimension of $E$ is greater than $d-\\frac{d-1}{2k}$, then the ${k+1 \\choose 2}$-dimensional Lebesgue measure of $T_k(E)$ is positive. This compliments previous work on the Falconer conjecture (\\cite{Erd05} and the references there), as well as work on finite point configurations \\cite{EHI11,GI10}. We also give applications to Erd\\"os-type problems in discrete geometry and a fractal regular value theorem, providing a multilinear framework for the results in \\cite{EIT11}.

  17. Computing Instantaneous Frequency by normalizing Hilbert Transform

    DOE Patents [OSTI]

    Huang, Norden E.

    2005-05-31

    This invention presents Normalized Amplitude Hilbert Transform (NAHT) and Normalized Hilbert Transform(NHT), both of which are new methods for computing Instantaneous Frequency. This method is designed specifically to circumvent the limitation set by the Bedorsian and Nuttal Theorems, and to provide a sharp local measure of error when the quadrature and the Hilbert Transform do not agree. Motivation for this method is that straightforward application of the Hilbert Transform followed by taking the derivative of the phase-angle as the Instantaneous Frequency (IF) leads to a common mistake made up to this date. In order to make the Hilbert Transform method work, the data has to obey certain restrictions.

  18. Generalized transformation optics from triple spacetime metamaterials

    E-Print Network [OSTI]

    L. Bergamin

    2008-10-27

    In this paper various extensions of the design strategy of transformation media are proposed. We show that it is possible to assign different transformed spaces to the field strength tensor (electric field and magnetic induction) and to the excitation tensor (displacement field and magnetic field), resp. In this way, several limitations of standard transformation media can be overcome. In particular it is possible to provide a geometric interpretation of non-reciprocal as well as indefinite materials. We show that these transformations can be complemented by a continuous version of electric-magnetic duality and comment on the relation to the complementary approach of field-transforming metamaterials.

  19. Educating Consumers: New Content on Diesel Vehicles, Diesel Exhaust Fluid, and Selective Catalytic Reduction Technologies on the AFDC (Presentation)

    SciTech Connect (OSTI)

    Brodt-Giles, D.

    2008-08-05

    Presentation covers new content available on the Alternative Fuels and Advanced Vehicle Data Center regarding diesel vehicles, diesel exhaust fluid, and selective catalytic reduction technologies.

  20. Educating Consumers: New Content on Diesel Vehicles, Diesel Exhaust Fluid, and Selective Catalytic Reduction Technologies on the AFDC

    Office of Energy Efficiency and Renewable Energy (EERE)

    Showcases new content added to the AFDC including: Diesel Vehicles, Diesel Exhaust Fluid, Selective Catalytic Reduction Technologies, and an upcoming Deisel Exhaust Fluid Locator.

  1. Transform Solar | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEt Al., 2013)OpenEnergyTrail Canyon Geothermal Project JumpTechTransform

  2. Fourier Transform Quantum State Tomography

    E-Print Network [OSTI]

    Mohammadreza Mohammadi; Agata M. Branczyk; Daniel F. V. James

    2013-01-17

    We propose a technique for performing quantum state tomography of photonic polarization-encoded multi-qubit states. Our method uses a single rotating wave plate, a polarizing beam splitter and two photon-counting detectors per photon mode. As the wave plate rotates, the photon counters measure a pseudo-continuous signal which is then Fourier transformed. The density matrix of the state is reconstructed using the relationship between the Fourier coefficients of the signal and the Stokes' parameters that represent the state. The experimental complexity, i.e. different wave plate rotation frequencies, scales linearly with the number of qubits.

  3. High flux solar energy transformation

    DOE Patents [OSTI]

    Winston, R.; Gleckman, P.L.; O'Gallagher, J.J.

    1991-04-09

    Disclosed are multi-stage systems for high flux transformation of solar energy allowing for uniform solar intensification by a factor of 60,000 suns or more. Preferred systems employ a focusing mirror as a primary concentrative device and a non-imaging concentrator as a secondary concentrative device with concentrative capacities of primary and secondary stages selected to provide for net solar flux intensification of greater than 2000 over 95 percent of the concentration area. Systems of the invention are readily applied as energy sources for laser pumping and in other photothermal energy utilization processes. 7 figures.

  4. Transformation: emergence of the self†

    E-Print Network [OSTI]

    Stein, Murray

    1998-01-01

    with Verena Kast. They must have fallen on fertile soil, because they continued to grow in my mind until I was offered the opportunity to present the Carolyn and Ernest Fay Lectures for 1997. By that time, I knew that transformation would be my theme. In a... sense, this book is an extension of my earlier work, In MidLife, published some fifteen years ago. Also, it offers a theoretical base for my more recent book, Practicing Wholeness. While teaching at the Jung Institute of Chicago and lecturing...

  5. High flux solar energy transformation

    DOE Patents [OSTI]

    Winston, Roland (Chicago, IL); Gleckman, Philip L. (Chicago, IL); O'Gallagher, Joseph J. (Flossmoor, IL)

    1991-04-09

    Disclosed are multi-stage systems for high flux transformation of solar energy allowing for uniform solar intensification by a factor of 60,000 suns or more. Preferred systems employ a focusing mirror as a primary concentrative device and a non-imaging concentrator as a secondary concentrative device with concentrative capacities of primary and secondary stages selected to provide for net solar flux intensification of greater than 2000 over 95 percent of the concentration area. Systems of the invention are readily applied as energy sources for laser pumping and in other photothermal energy utilization processes.

  6. Transformational Manufacturing | Argonne National Laboratory

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired Solar FuelTechnologyTel:FebruaryEIA'sTrainingActivityTransformational

  7. Ultrafast Transformations in Superionic Nanocrystals

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking With WIPPfinal designUltrafast Transformations in Superionic

  8. Ultrafast Transformations in Superionic Nanocrystals

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking With WIPPfinal designUltrafast Transformations in SuperionicUltrafast

  9. Catalytic two-stage coal hydrogenation process using extinction recycle of heavy liquid fraction

    DOE Patents [OSTI]

    MacArthur, James B. (Denville, NJ); Comolli, Alfred G. (Yardley, PA); McLean, Joseph B. (Somerville, NJ)

    1989-01-01

    A process for catalytic two-stage hydrogenation and liquefaction of coal with selective extinction recycle of all heavy liquid fractions boiling above a distillation cut point of about 600.degree.-750.degree. F. to produce increased yields of low-boiling hydrocarbon liquid and gas products. In the process, the particulate coal feed is slurried with a process-derived liquid solvent normally boiling above about 650.degree. F. and fed into a first stage catalytic reaction zone operated at conditions which promote controlled rate liquefaction of the coal, while simultaneously hydrogenating the hydrocarbon recycle oils. The first stage reactor is maintained at 710.degree.-800.degree. F. temperature, 1000-4000 psig hydrogen partial pressure, and 10-90 lb/hr per ft.sup.3 catalyst space velocity. Partially hydrogenated material withdrawn from the first stage reaction zone is passed directly to the second stage catalytic reaction zone maintained at 760.degree.-860.degree. F. temperature for further hydrogenation and hydroconversion reactions. A 600.degree.-750.degree. F..sup.+ fraction containing 0-20 W % unreacted coal and ash solids is recycled to the coal slurrying step. If desired, the cut point lower boiling fraction can be further catalytically hydrotreated. By this process, the coal feed is successively catalytically hydrogenated and hydroconverted at selected conditions, to provide significantly increased yields of desirable low-boiling hydrocarbon liquid products and minimal production of hydrocarbon gases, and no net production of undesirable heavy oils and residuum materials.

  10. Catalytic two-stage coal hydrogenation process using extinction recycle of heavy liquid fraction

    DOE Patents [OSTI]

    MacArthur, J.B.; Comolli, A.G.; McLean, J.B.

    1989-10-17

    A process is described for catalytic two-stage hydrogenation and liquefaction of coal with selective extinction recycle of all heavy liquid fractions boiling above a distillation cut point of about 600--750 F to produce increased yields of low-boiling hydrocarbon liquid and gas products. In the process, the particulate coal feed is slurried with a process-derived liquid solvent normally boiling above about 650 F and fed into a first stage catalytic reaction zone operated at conditions which promote controlled rate liquefaction of the coal, while simultaneously hydrogenating the hydrocarbon recycle oils. The first stage reactor is maintained at 710--800 F temperature, 1,000--4,000 psig hydrogen partial pressure, and 10-90 lb/hr per ft[sup 3] catalyst space velocity. Partially hydrogenated material withdrawn from the first stage reaction zone is passed directly to the second stage catalytic reaction zone maintained at 760--860 F temperature for further hydrogenation and hydroconversion reactions. A 600--750 F[sup +] fraction containing 0--20 W % unreacted coal and ash solids is recycled to the coal slurrying step. If desired, the cut point lower boiling fraction can be further catalytically hydrotreated. By this process, the coal feed is successively catalytically hydrogenated and hydroconverted at selected conditions, to provide significantly increased yields of desirable low-boiling hydrocarbon liquid products and minimal production of hydrocarbon gases, and no net production of undesirable heavy oils and residuum materials. 2 figs.

  11. Ultrafast Transformations in Superionic Nanocrystals

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

    pathways determining how these materials switch and the new functional properties that emerge at the nanoscale are largely unknown and unexplored. Researchers have recently carried...

  12. LOCAL FOURIER TRANSFORMS AND RIGIDITY FOR D-MODULES

    E-Print Network [OSTI]

    Bloch, Spencer

    LOCAL FOURIER TRANSFORMS AND RIGIDITY FOR D. Local Fourier transforms, analogous to the `-adic local Fourier transforms [14], are constructed infinitesimal rigidity condition is satisfied. As in [12], the argument uses local Fourier transforms

  13. Transformation induced plasticity assisted steels: stress or strain affected martensitic

    E-Print Network [OSTI]

    Cambridge, University of

    Transformation induced plasticity assisted steels: stress or strain affected martensitic induced martensitic transformation of the retained austenite in TRIP assisted steels. The authors begin transformation? S. Chatterjee and H. K. D. H. Bhadeshia* Transformation induced plasticity (TRIP) assisted steels

  14. A Transformational View of Cartography W. R. Tobler

    E-Print Network [OSTI]

    Clarke, Keith

    A Transformational View of Cartography W. R. Tobler ABSTRACT. Cartographic transformations aliases are between points, lines, and areas. Substantive transformations occur in map interpolation transformational grammars, as originally devised for linguistics.2, 4 A similar, though less ambitious, attempt

  15. System and method for determining an ammonia generation rate in a three-way catalyst

    DOE Patents [OSTI]

    Sun, Min; Perry, Kevin L; Kim, Chang H

    2014-12-30

    A system according to the principles of the present disclosure includes a rate determination module, a storage level determination module, and an air/fuel ratio control module. The rate determination module determines an ammonia generation rate in a three-way catalyst based on a reaction efficiency and a reactant level. The storage level determination module determines an ammonia storage level in a selective catalytic reduction (SCR) catalyst positioned downstream from the three-way catalyst based on the ammonia generation rate. The air/fuel ratio control module controls an air/fuel ratio of an engine based on the ammonia storage level.

  16. Selective Catalytic Oxidation of Hydrogen Sulfide on Activated Carbons Impregnated with Sodium Hydroxide

    SciTech Connect (OSTI)

    Schwartz, Viviane [ORNL; Baskova, Svetlana [ORNL; Armstrong, Timothy R. [ORNL

    2009-01-01

    Two activated carbons of different origin were impregnated with the solution of sodium hydroxide (NaOH) of various concentrations up to 10 wt %, and the effect of impregnation on the catalytic performance of the carbons was evaluated. The catalytic activity was analyzed in terms of the capacity of carbons for hydrogen sulfide (H2S) conversion and removal from hydrogen-rich fuel streams and the emission times of H2S and the products of its oxidation [e.g., sulfur dioxide (SO2) and carbonyl sulfide (COS)]. The results of impregnation showed a significant improvement in the catalytic activity of both carbons proportional to the amount of NaOH introduced. NaOH introduces hydroxyl groups (OH-) on the surface of the activated carbon that increase its surface reactivity and its interaction with sulfur-containing compounds.

  17. SPONTANEOUS CATALYTIC WET AIR OXIDATION DURING PRE-TREATMENT OF HIGH-LEVEL RADIOACTIVE WASTE SLUDGE

    SciTech Connect (OSTI)

    Koopman, D.; Herman, C.; Pareizs, J.; Bannochie, C.; Best, D.; Bibler, N.; Fellinger, T.

    2009-10-01

    Savannah River Remediation, LLC (SRR) operates the Defense Waste Processing Facility for the U.S. Department of Energy at the Savannah River Site. This facility immobilizes high-level radioactive waste through vitrification following chemical pretreatment. Catalytic destruction of formate and oxalate ions to carbon dioxide has been observed during qualification testing of non-radioactive analog systems. Carbon dioxide production greatly exceeded hydrogen production, indicating the occurrence of a process other than the catalytic decomposition of formic acid. Statistical modeling was used to relate the new reaction chemistry to partial catalytic wet air oxidation of both formate and oxalate ions driven by the low concentrations of palladium, rhodium, and/or ruthenium in the waste. Variations in process conditions led to increases or decreases in the total oxidative destruction, as well as partially shifting the preferred species undergoing destruction from oxalate ion to formate ion.

  18. Briefly Bound to Activate: Transient Binding of a Second Catalytic...

    Office of Scientific and Technical Information (OSTI)

    and Dynamics of CDK2 Kinase for Catalysis We have determined high-resolution crystal structures of a CDK2Cyclin A transition state complex bound to ADP, substrate peptide, and...

  19. Modeling Solid Propellant Strand Burner Experiments with Catalytic Additives†

    E-Print Network [OSTI]

    Frazier, Corey

    2012-02-14

    This dissertation studies how nanoadditives influence burning rates through the development and use of a model to conduct parametric studies on nanoadditive interaction and to formulate theories. Decades of research have yet to determine...

  20. CATALYTIC MAJORIZATION AND # p NORMS GUILLAUME AUBRUN AND ION NECHITA

    E-Print Network [OSTI]

    Aubrun, Guillaume

    |## ? We restrict ourselves to LOCC protocols: Alice and Bob share |## and have at their disposal only given states |## and |## whether # # # ## is satisfifted or not, but there is no direct way to determine

  1. Energy Technology Solutions: Public-Private Partnerships Transforming...

    Energy Savers [EERE]

    Energy Technology Solutions: Public-Private Partnerships Transforming Industry, November 2010 Energy Technology Solutions: Public-Private Partnerships Transforming Industry,...

  2. NEMA Distribution Transformers, CCE Overview and Update presentation...

    Office of Environmental Management (EM)

    Distribution Transformers, CCE Overview and Update presentation, dated 05242011 NEMA Distribution Transformers, CCE Overview and Update presentation, dated 05242011 This...

  3. Atomic-Structural Synergy for Catalytic CO Oxidation over Palladium-Nickel Nanoalloys

    SciTech Connect (OSTI)

    Shan, Shiyao; Petkov, Valeri; Yang, Lefu; Luo, Jin; Joseph, Pharrah; Mayzel, Dina; Prasai, Binay; Wang, Lingyan; Engelhard, Mark H.; Zhong, Chuan-Jian

    2014-05-05

    Alloying palladium (Pd) with other transition metals at the nanoscale has become an important pathway for preparation of low-cost, highly-active and stable catalysts. However the lack of understanding of how the alloying phase state, chemical composition and atomic-scale structure of the alloys at the nanoscale influence their catalytic activity impedes the rational design of Pd-nanoalloy catalysts. This work addresses this challenge by a novel approach to investigating the catalytic oxidation of carbon monoxide (CO) over palladium-nickel (PdNi) nanoalloys with well-defined bimetallic composition, which reveals a remarkable a maximal catalytic activity at Pd:Ni ratio of ~50:50. Key to understanding the structural-catalytic synergy is the use of high-energy synchrotron X-ray diffraction coupled to atomic pair distribution function (HE-XRD/PDF) analysis to probe the atomic structure of PdNi nanoalloys under controlled thermochemical treatments and CO reaction conditions. Three-dimensional (3D) models of the atomic structure of the nanoalloy particles were generated by reverse Monte Carlo simulations (RMC) guided by the experimental HE-XRD/PDF data. Structural details of the PdNi nanoalloys were extracted from the respective 3D models and compared with the measured catalytic properties. The comparison revealed a strong correlation between the phase state, chemical composition and atomic-scale structure of PdNi nanoalloys and their catalytic activity for CO oxidation. This correlation is further substantiated by analyzing the first atomic neighbor distances and coordination numbers inside the nanoalloy particles and at their surfaces. These findings have provided new insights into the structural synergy of nanoalloy catalysts by controlling the phase state, composition and atomic structure, complementing findings of traditional density functional theory studies.

  4. The Effects of Trace Contaminants on Catalytic Processing of Biomass-Derived Feedstocks

    SciTech Connect (OSTI)

    Elliott, Douglas C.; Peterson, Keith L.; Muzatko, Danielle S.; Alderson, Eric V.; Hart, Todd R.; Neuenschwander, Gary G.

    2004-03-25

    Trace components in biomass feedstocks are potential catalyst poisons when catalytically processing these materials to value-added chemical products. Trace components include inorganic elements such as alkali metals and alkaline earths, phosphorus or sulfur, aluminum or silicon, chloride, or transition metals. Protein components in biomass feedstocks can lead to formation of peptide fractions (from hydrolysis) or ammonium ions (from more severe breakdown) both of which might interfere with catalysis. The effects of these components on catalytic hydrogenation processing has been studied in batch reactor processing tests

  5. Solid state oxygen anion and electron mediating membrane and catalytic membrane reactors containing them

    DOE Patents [OSTI]

    Schwartz, Michael; White, James H.; Sammells, Anthony F.

    2005-09-27

    This invention relates to gas-impermeable, solid state materials fabricated into membranes for use in catalytic membrane reactors. This invention particularly relates to solid state oxygen anion- and electron-mediating membranes for use in catalytic membrane reactors for promoting partial or full oxidation of different chemical species, for decomposition of oxygen-containing species, and for separation of oxygen from other gases. Solid state materials for use in the membranes of this invention include mixed metal oxide compounds having the brownmillerite crystal structure.

  6. Solid state oxygen anion and electron mediating membrane and catalytic membrane reactors containing them

    DOE Patents [OSTI]

    Schwartz, Michael (Boulder, CO); White, James H. (Boulder, CO); Sammels, Anthony F. (Boulder, CO)

    2000-01-01

    This invention relates to gas-impermeable, solid state materials fabricated into membranes for use in catalytic membrane reactors. This invention particularly relates to solid state oxygen anion- and electron-mediating membranes for use in catalytic membrane reactors for promoting partial or full oxidation of different chemical species, for decomposition of oxygen-containing species, and for separation of oxygen from other gases. Solid state materials for use in the membranes of this invention include mixed metal oxide compounds having the brownmillerite crystal structure.

  7. Hydrogen ions produced by plasma-assisted catalytic ionization using nickel grid

    SciTech Connect (OSTI)

    Oohara, W.; Kawata, K.; Hibino, T. [Department of Electronic Device Engineering, Yamaguchi University, Ube 755-8611 (Japan)] [Department of Electronic Device Engineering, Yamaguchi University, Ube 755-8611 (Japan)

    2013-06-15

    Positive and negative hydrogen ions are produced by plasma-assisted catalytic ionization using a nickel grid, where the irradiation current density of positive ions onto the grid can be controlled by the discharge power. The irradiation energy can be controlled by both the grid potential and the discharge plasma potential. Extraction properties and energy distributions of positive and negative ions produced in the cases of using the grid and a porous nickel plate are compared. Two production mechanisms of negative ions are found in the process of plasma-assisted catalytic ionization.

  8. Catalytic Templating Approaches for Three-Dimensional Hollow Carbon/Graphene Oxide Nano-Architectures

    SciTech Connect (OSTI)

    Moon, Gun-Hee; Shin, Yongsoon; Choi, Daiwon; Arey, Bruce W.; Exarhos, Gregory J.; Wang, Chong M.; Choi, Wonyong; Liu, Jun

    2013-01-01

    We report a catalytic templating method to synthesize well-controlled, three-dimensional (3D) nano-architectures with graphene oxide sheets. The 3D composites are prepared via self-assembly of carbon, GO, and spherical alumina-coated silica (ACS) templates during a catalytic reaction porcess. By changing the GO content, we can systematically tune the architecture from layered composites to 3D hollow structures to microporous materials. The composites show a synergistic effect with significantly superior properties than either pure carbon or r-GO prepared with a significant enhancement to its capacitance at high current density.

  9. The Fourier Transform on Quantum Euclidean Space

    E-Print Network [OSTI]

    Kevin Coulembier

    2011-05-11

    We study Fourier theory on quantum Euclidean space. A modified version of the general definition of the Fourier transform on a quantum space is used and its inverse is constructed. The Fourier transforms can be defined by their Bochner's relations and a new type of q-Hankel transforms using the first and second q-Bessel functions. The behavior of the Fourier transforms with respect to partial derivatives and multiplication with variables is studied. The Fourier transform acts between the two representation spaces for the harmonic oscillator on quantum Euclidean space. By using this property it is possible to define a Fourier transform on the entire Hilbert space of the harmonic oscillator, which is its own inverse and satisfies the Parseval theorem.

  10. Quantum Energy Regression using Scattering Transforms

    E-Print Network [OSTI]

    Matthew Hirn; Nicolas Poilvert; Stephane Mallat

    2015-02-06

    We present a novel approach to the regression of quantum mechanical energies based on a scattering transform of an intermediate electron density representation. A scattering transform is a deep convolution network computed with a cascade of multiscale wavelet transforms. It possesses appropriate invariant and stability properties for quantum energy regression. This new framework removes fundamental limitations of Coulomb matrix based energy regressions, and numerical experiments give state-of-the-art accuracy over planar molecules.

  11. Quantum Energy Regression using Scattering Transforms

    E-Print Network [OSTI]

    Hirn, Matthew; Mallat, Stephane

    2015-01-01

    We present a novel approach to the regression of quantum mechanical energies based on a scattering transform of an intermediate electron density representation. A scattering transform is a deep convolution network computed with a cascade of multiscale wavelet transforms. It possesses appropriate invariant and stability properties for quantum energy regression. This new framework removes fundamental limitations of Coulomb matrix based energy regressions, and numerical experiments give state-of-the-art accuracy over planar molecules.

  12. Non-Hermitian Hamiltonians and similarity transformations

    E-Print Network [OSTI]

    Francisco M. FernŠndez

    2015-03-06

    We show that similarity (or equivalent) transformations enable one to construct non-Hermitian operators with real spectrum. In this way we can also prove and generalize the results obtained by other authors by means of a gauge-like transformation and its generalization. Such similarity transformations also reveal the connection with pseudo-Hermiticity in a simple and straightforward way. In addition to it we consider the positive and negative eigenvalues of a three-parameter non-Hermitian oscillator.

  13. Disformal transformation in Newton-Cartan geometry

    E-Print Network [OSTI]

    Huang, Peng

    2015-01-01

    Newton-Cartan geometry has played a central role in recent discussions of non-relativistic holography and condensed matter systems. Although the conformal transformation in non-relativistic holography can be easily rephrased in Newton-Cartan geometry, we show that it requires a nontrivial procedure to get the consistent form of anisotropic disformal transformation in this geometry. Furthermore, as an application of the newly obtained disformal transformation, we use it to induce a new geometry.

  14. Disformal transformation in Newton-Cartan geometry

    E-Print Network [OSTI]

    Peng Huang; Fang-Fang Yuan

    2015-09-20

    Newton-Cartan geometry has played a central role in recent discussions of non-relativistic holography and condensed matter systems. Although the conformal transformation in non-relativistic holography can be easily rephrased in Newton-Cartan geometry, we show that it requires a nontrivial procedure to get the consistent form of anisotropic disformal transformation in this geometry. Furthermore, as an application of the newly obtained disformal transformation, we use it to induce a new geometry.

  15. One-way transformation of information

    DOE Patents [OSTI]

    Cooper, James A. (Albuquerque, NM)

    1989-01-01

    Method and apparatus are provided for one-way transformation of data according to multiplication and/or exponentiation modulo a prime number. An implementation of the invention permits the one way residue transformation, useful in encryption and similar applications, to be implemented by n-bit computers substantially with no increase in difficulty or complexity over a natural transformation thereby, using a modulus which is a power of two.

  16. Catalytic Role of Gold in Gold-Based Catalysts: A Density Functional Theory Study on the CO Oxidation on Gold

    E-Print Network [OSTI]

    Alavi, Ali

    Catalytic Role of Gold in Gold-Based Catalysts: A Density Functional Theory Study on the CO Oxidation on Gold Zhi-Pan Liu and P. Hu* Contribution from the School of Chemistry, The Queen's Uni years, being regarded as a new generation of catalysts due to their unusually high catalytic performance

  17. Catalytic pyrolysis of methane on Mo/H-ZSM5 with continuous hydrogen removal by permeation through dense oxide lms

    E-Print Network [OSTI]

    Iglesia, Enrique

    Catalytic pyrolysis of methane on Mo/H-ZSM5 with continuous hydrogen removal by permeation through ģlms, chain-limiting catalytic pyrolysis reactions on Mo/H-ZSM5, and CO2 co-reactants led to stable simulations in tubular reactors with permeable walls. KEY WORDS: methane pyrolysis; membrane reactors; Mo

  18. IEEE TRANSACTION ON CONTROL SYSTEM TECHNOLOGY, VOL. XX, NO. Y, MONTH 2003 1 Control of Natural Gas Catalytic Partial

    E-Print Network [OSTI]

    Stefanopoulou, Anna

    Catalytic Partial Oxidation for Hydrogen Generation in Fuel Cell Applications Jay T. Pukrushpan, Anna G that reforms natural gas to hydrogen-rich mixture to feed the anode field of fuel cell stack is considered. The first reactor that generates the majority of the hydrogen in the fuel processor is based on catalytic

  19. Diffusion and Catalytic Cracking of 1,3,5 Tri-iso-propyl-benzene in FCC Catalysts

    E-Print Network [OSTI]

    Al-Khattaf, Sulaiman

    1 Diffusion and Catalytic Cracking of 1,3,5 Tri-iso- propyl-benzene in FCC Catalysts S.Al-Khattaf1 describes catalytic cracking experiments developed in a novel CREC Riser Simulator using 1,3,5-Tri-iso-propyl-benzene

  20. The effect of substrate constraint on the martensitic transformation of Ni-Ti thin films

    SciTech Connect (OSTI)

    Mathews, S.A.; Wuttig, M.; Su, Q. [Univ. of Maryland, College Park, MD (United States). Dept. of Materials and Nuclear Engineering

    1996-09-01

    Previous work on an equiatomic alloy of nickel and titanium (nitinol) indicates that the martensitic transformation in thin films may be suppressed by interfacial constraint imposed by the substrate. Ni{sub 50}Ti{sub 50} films were deposited at room temperature on oxidized (100) Si substrates and tested to determine when the martensitic transformation occurred for both attached and free-standing conditions.

  1. High-tech buildings - Market transformation project

    E-Print Network [OSTI]

    Applications Team

    2001-01-01

    Energy Benchmarking in High-Tech and Biotech Industries,ĒRecommendations for future high-tech facilities energyLBNL. Task Three-High-Tech Buildings Market Transformation

  2. Wavelet transform techniques and signal analysis

    SciTech Connect (OSTI)

    Perez, R.B.; Mattingly, J.K. Tennessee Univ., Knoxville, TN . Dept. of Nuclear Engineering); Perez, J.S. . Facultad de Informatica)

    1993-01-01

    Traditionally, the most widely used signal analysis tool is the Fourier transform which, by producing power spectral densities (PSDs), allows time dependent signals to be studied in the frequency domain. However, the Fourier transform is global -- it extends over the entire time domain -- which makes it ill-suited to study nonstationary signals which exhibit local temporal changes in the signal's frequency content. To analyze nonstationary signals, the family of transforms commonly designated as short-time Fourier transforms (STFTs), capable of identifying temporally localized changes in the signal's frequency content, were developed by employing window functions to isolate temporal regions of the signal. For example, the Gabor STFT uses a Gaussian window. However, the applicability of STFTs is limited by various inadequacies. The Wavelet transform (NW), recently developed by Grossman and Morlet and explored in depth by Daubechies (2) and Mallat, remedies the inadequacies of STFTs. Like the Fourier transform, the WT can be implemented as a discrete transform (DWT) or as a continuous (integral) transform (CWT). This paper briefly illustrates some of the potential applications of the wavelet transform algorithms to signal analysis.

  3. Wavelet transform techniques and signal analysis

    SciTech Connect (OSTI)

    Perez, R.B.; Mattingly, J.K. |; Perez, J.S.

    1993-03-01

    Traditionally, the most widely used signal analysis tool is the Fourier transform which, by producing power spectral densities (PSDs), allows time dependent signals to be studied in the frequency domain. However, the Fourier transform is global -- it extends over the entire time domain -- which makes it ill-suited to study nonstationary signals which exhibit local temporal changes in the signal`s frequency content. To analyze nonstationary signals, the family of transforms commonly designated as short-time Fourier transforms (STFTs), capable of identifying temporally localized changes in the signal`s frequency content, were developed by employing window functions to isolate temporal regions of the signal. For example, the Gabor STFT uses a Gaussian window. However, the applicability of STFTs is limited by various inadequacies. The Wavelet transform (NW), recently developed by Grossman and Morlet and explored in depth by Daubechies (2) and Mallat, remedies the inadequacies of STFTs. Like the Fourier transform, the WT can be implemented as a discrete transform (DWT) or as a continuous (integral) transform (CWT). This paper briefly illustrates some of the potential applications of the wavelet transform algorithms to signal analysis.

  4. The Lorentz Integral Transform and its Inversion

    E-Print Network [OSTI]

    N. Barnea; V. D. Efros; W. Leidemann; G. Orlandini

    2009-12-23

    The Lorentz integral transform method is briefly reviewed. The issue of the inversion of the transform, and in particular its ill-posedness, is addressed. It is pointed out that the mathematical term ill-posed is misleading and merely due to a historical misconception. In this connection standard regularization procedures for the solution of the integral transform problem are presented. In particular a recent one is considered in detail and critical comments on it are provided. In addition a general remark concerning the concept of the Lorentz integral transform as a method with a controlled resolution is made.

  5. Transformers: The Levers and Gears of Electricity

    Broader source: Energy.gov [DOE]

    This video is a great resource for teachers, demonstrating how transformers work. It includes experiments and demos that can be shared with students.

  6. ENERGY DIVISION STATUS OF SUPERCONDUCTING POWER TRANSFORMER

    Office of Scientific and Technical Information (OSTI)

    Momvm, evert the very limited losses of existing transfmers represent a significant cost over the expected life of the transformer. The desire to reduce these losses in...

  7. An index 2F2 hypergeometric transform

    E-Print Network [OSTI]

    Zouhair Mouayn

    2011-05-12

    We construct a new one-parameter family of index hypergeometric transforms associated with the relativistic pseudoharmonic oscillator by using coherent states analysis.

  8. A Structural Hinge in Eukaryotic MutY Homologues Mediates Catalytic Activity and Rad9-Rad1-Hus1 Checkpoint Complex Interactions

    SciTech Connect (OSTI)

    P Luncsford; D Chang; G Shi; J Bernstein; A Madabushi; D Patterson; A Lu; E Toth

    2011-12-31

    The DNA glycosylase MutY homologue (MYH or MUTYH) removes adenines misincorporated opposite 8-oxoguanine as part of the base excision repair pathway. Importantly, defects in human MYH (hMYH) activity cause the inherited colorectal cancer syndrome MYH-associated polyposis. A key feature of MYH activity is its coordination with cell cycle checkpoint via interaction with the Rad9-Rad1-Hus1 (9-1-1) complex. The 9-1-1 complex facilitates cell cycle checkpoint activity and coordinates this activity with ongoing DNA repair. The interdomain connector (IDC, residues 295-350) between the catalytic domain and the 8-oxoguanine recognition domain of hMYH is a critical element that maintains interactions with the 9-1-1 complex. We report the first crystal structure of a eukaryotic MutY protein, a fragment of hMYH (residues 65-350) that consists of the catalytic domain and the IDC. Our structure reveals that the IDC adopts a stabilized conformation projecting away from the catalytic domain to form a docking scaffold for 9-1-1. We further examined the role of the IDC using Schizosaccharomyces pombe MYH as model system. In vitro studies of S. pombe MYH identified residues I261 and E262 of the IDC (equivalent to V315 and E316 of the hMYH IDC) as critical for maintaining the MYH/9-1-1 interaction. We determined that the eukaryotic IDC is also required for DNA damage selection and robust enzymatic activity. Our studies also provide the first evidence that disruption of the MYH/9-1-1 interaction diminishes the repair of oxidative DNA damage in vivo. Thus, preserving the MYH/9-1-1 interaction contributes significantly to minimizing the mutagenic potential of oxidative DNA damage.

  9. Using a dual plasma process to produce cobalt--polypyrrole catalysts for the oxygen reduction reaction in fuel cells -- part I: characterisation of the catalytic activity and surface structure

    E-Print Network [OSTI]

    Walter, Christian; Vyalikh, Denis; BrŁser, Volker; Quade, Antje; Weltmann, Klaus-Dieter; 10.1149/2.078208jes

    2012-01-01

    A new dual plasma coating process to produce platinum-free catalysts for the oxygen reduction reaction in a fuel cell is introduced. The catalysts thus produced were analysed with various methods. Electrochemical characterisation was carried out by cyclic voltammetry, rotating ring- and rotating ring-disk electrode. The surface porosity of the different catalysts thus obtained was characterised with the nitrogen gas adsorption technique and scanning electron microscopy was used to determine the growth mechanisms of the films. It is shown that catalytically active compounds can be produced with this dual plasma process. Furthermore, the catalytic activity can be varied significantly by changing the plasma process parameters. The amount of H$_2$O$_2$ produced was calculated and shows that a 2 electron mechanism is predominant. The plasma coating mechanism does not significantly change the surface BET area and pore size distribution of the carbon support used. Furthermore, scanning electron microscopy pictures o...

  10. Catalytic cracking. (Latest citations from the NTIS data base). Published Search

    SciTech Connect (OSTI)

    Not Available

    1992-05-01

    The bibliography contains citations concerning applications of catalytic cracking in fluidized beds, moving beds, refineries, vacuum distillation, and reformers. Design criteria, models, controls, and operating procedures are also discussed. (Contains 250 citations and includes a subject term index and title list.)

  11. Catalytic cracking. (Latest citations from the NTIS Bibliographic database). Published Search

    SciTech Connect (OSTI)

    Not Available

    1993-09-01

    The bibliography contains citations concerning applications of catalytic cracking in fluidized beds, moving beds, refineries, vacuum distillation, and reformers. Design criteria, models, controls, and operating procedures are also discussed. (Contains 250 citations and includes a subject term index and title list.)

  12. Scaling Issues of Micro Catalytic Reactors Tzong-Shyng Leu1,a

    E-Print Network [OSTI]

    Leu, Tzong-Shyng "Jeremy"

    by using microfabrication technology. These include micro IC engines [1] and micro gas turbines [2 combustor, Microscale combustion, Power MEMS Abstract. Micro catalytic combustors are studied experimentally interest in the realization of combustion at scales much smaller than previously explored. However

  13. CFD Simulation of Catalytic Upgrading of Pyrolytic Vapours in FCC Riser

    E-Print Network [OSTI]

    -treatment of pyrolysis vapor; Design of catalyst (Red mud) Aqueous phase HDO upgrading of pre-treated bio-oil. ProcessCFD Simulation of Catalytic Upgrading of Pyrolytic Vapours in FCC Riser Prof Sai Gu, Centre/pre- commercial ∑ Quality: Produced oil not suitable for transportation fuels: high oxygen, acidity and reactivity

  14. DOI: 10.1002/adma.200601618 Dual Nanoparticle/Substrate Control of Catalytic

    E-Print Network [OSTI]

    Pennycook, Steve

    to polymerize and are the primary feed- stock of the petrochemical industry, especially ethene (n = 2. It has been found that oxidative catalytic dehydrogenation, that is, a process assisted by both a solid studies seeking under- standing that may help optimization of the process.[3,4,6,7] It has been

  15. Experiments on the reduction of nitric oxide from exhaust gases by selective non-catalytic reactions†

    E-Print Network [OSTI]

    Narney, John Kenneth

    1993-01-01

    The use of ammonia in a selective non-catalytic process for the removal of nitric oxide (NO) from exhaust gases was studied. A quartz lined flow reactor system was constructed in order to examine the behavior of the process with 15% oxygen...

  16. Long life catalytic membrane reactors for spontaneous conversion of natural gas to synthesis gas

    SciTech Connect (OSTI)

    Schwartz, M., White, J., Deych, S., Millard, J., Myers, M., Sammells, A.

    1997-10-01

    This program is focusing on the development of mixed ionic and electronic conducting materials based on the brown millerite structure for use in catalytic membrane reactors (CMRs). These CMRs are being evaluated for promoting the spontaneous and highly selective oxidative reforming of carbon dioxide / natural gas mixtures to synthesis gas.

  17. Systematic evaluation of monometallic catalytic materials for lean-burn NOx reduction using combinatorial methods

    E-Print Network [OSTI]

    Senkan, Selim M.

    Systematic evaluation of monometallic catalytic materials for lean-burn NOx reduction using the commercialization of such engines [1]. In principle, NOx reduction could be achieved by either decomposition of NOx for NOx reduction. These efforts were spurred by the discoveries that NO can selectively be reduced over

  18. Synthesis and Catalytic Properties of Metal Clusters Encapsulated within Small-Pore (SOD, GIS, ANA) Zeolites

    E-Print Network [OSTI]

    Iglesia, Enrique

    Synthesis and Catalytic Properties of Metal Clusters Encapsulated within Small-Pore (SOD, GIS, ANA.28 nm), GIS (Gismondine, 0.45 nm ◊ 0.31 nm), and ANA (Analcime, 0.42 nm ◊ 0.16 nm) zeolites. Encapsulation was achieved via direct hydrothermal synthesis for SOD and GIS using metal precursors stabilized

  19. in: Nanotechnology 7(1), pp. 307314, 1996 Emergent Computation by Catalytic Reactions

    E-Print Network [OSTI]

    Dittrich, Peter

    in: Nanotechnology 7(1), pp. 307≠314, 1996 Emergent Computation by Catalytic Reactions Wolfgang the idea behind the chemical computational metaphor and outline its relevance for nanotechnology. We set up within this context. The implications of this approach for nanotechnology, parallel computers based on mo

  20. Stability of Multiple Steady States of Catalytic Combustion , and J. BRINDLEY

    E-Print Network [OSTI]

    James, Alex

    Stability of Multiple Steady States of Catalytic Combustion A. JAMES* , and J. BRINDLEY Department reaction (m s 1 ) Ag Pre-exponential factor for gas-phase reaction (m3 mol 1 s 1 ) Cox Initial [O2] (mol m mol 1 ) h Heat transfer coefficient (W m 2 K 1 ) hD Mass transfer coefficient (m s 1 ) kc Thermal

  1. Evidence for catalytic water oxidation by a dimanganese tetrakis-Schiff base macrocycle

    E-Print Network [OSTI]

    Dinolfo, Peter H.

    Evidence for catalytic water oxidation by a dimanganese tetrakis-Schiff base macrocycle Subhadeep August 2014 Keywords: Water oxidation Homogeneous catalysis Manganese Artificial photosynthesis order depen- dence on H2O and [MnII 2L]2+ , indicative of electrocatalytic water oxidation. Controlled

  2. Modes of Activation of Organometallic Iridium Complexes for Catalytic Water and C-H Oxidation

    E-Print Network [OSTI]

    Zare, Richard N.

    Modes of Activation of Organometallic Iridium Complexes for Catalytic Water and C-H Oxidation - ) or (cod)IrI (cod = cyclooctadiene) complexes, which are water and C-H oxidation catalyst precursors. Extensive oxidation of the Cp* ligand is observed, likely beginning with electrophilic C-H hydroxylation

  3. Continuous Flow Oxidation of Alcohols and Aldehydes Utilizing Bleach and Catalytic Tetrabutylammonium Bromide

    E-Print Network [OSTI]

    Leduc, Andrew B.

    We report a method for the oxidation of a range of alcohols and aldehydes utilizing a simple flow system of alcohols in EtOAc with a stream of 12.5% NaOCl and catalytic Bu[subscript 4]NBr. Secondary alcohols are oxidized ...

  4. Comment on "Catalytic Activity of the Rh Surface Oxide: CO Oxidation over Rh(111)

    E-Print Network [OSTI]

    Goodman, Wayne

    . Obviously, heating Rh in pure oxygen to T ) 230 įC and above will lead to the formation of surface Rh oxideComment on "Catalytic Activity of the Rh Surface Oxide: CO Oxidation over Rh(111) under Realistic suggest the importance of a surface oxide phase for high CO2 formation in CO-O2 reactions. However

  5. Hybrid QM/MM Car-Parrinello Simulations of Catalytic and Enzymatic Reactions

    E-Print Network [OSTI]

    Guidoni, Leonardo

    1 Hybrid QM/MM Car-Parrinello Simulations of Catalytic and Enzymatic Reactions MariaCarola Colombo, we review some recent applications of hybrid Car-Parrinello simulations of chemical and biological recently developed a combination of these two techniques into a hybrid QM/MM Car-Parrinello scheme [4

  6. Flow reactor experiments on the selective non-catalytic removal of nitrogen oxides†

    E-Print Network [OSTI]

    Gentemann, Alexander M.G.

    2001-01-01

    also found. Selective non-catalytic removal of nitric oxide using a water/urea solution was performed in a temperature range between 800 and 1300 K. Different combinations of simulated exhaust gas were tested, which contained various fractions of O?...

  7. Kinetics of the Homogeneous Catalytic Hydrogenation of Olefins in Supercritical Carbon Dioxide Using a Fluoroacrylate Copolymer

    E-Print Network [OSTI]

    Abdou, Hanan E.

    Kinetics of the Homogeneous Catalytic Hydrogenation of Olefins in Supercritical Carbon Dioxide a fluoroacrylate copolymer grafted rhodium catalyst in supercritical carbon dioxide (scCO2) are reported field of chemical reaction engineering.3-8 Specifically, supercritical carbon dioxide (scCO2

  8. Catalytic CVD generation of high-purity single-walled carbon nanotubes at low temperature

    E-Print Network [OSTI]

    Maruyama, Shigeo

    CVD Catalytic CVD generation of high-purity single-walled carbon nanotubes at low temperature-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 We have demonstrated the high-quality and low-temperature generation on the generation temperature and gas flow rate. In order to create nanotube devices, we tried to generate SWNTs

  9. Synthesis of Chiral Hydroxyl Phospholanes from D-mannitol and Their Use in Asymmetric Catalytic Reactions

    E-Print Network [OSTI]

    Zhang, Xumu

    Synthesis of Chiral Hydroxyl Phospholanes from D-mannitol and Their Use in Asymmetric Catalytic State University, University Park, Pennsylvania 16802 Received January 18, 2000 Chiral hydroxyl explored. Rate acceleration in the Baylis-Hillman reaction was observed when a hydroxyl phosphine was used

  10. The `catalytic triad' mechanism, which involves a serine, aspartic acid, has become synonymous with serine pr

    E-Print Network [OSTI]

    Paetzel, Mark

    with serine pr recently, mechanistically novel serine proteases have These proteases use hydroxyl/e-amine their involvementin I FIgwe (a)The classical catalytic triad. (b) dyad. (c) The hydroxyl/a-amine dyad. The Ser type of hydroxyl/amine cata- lytic dyad, similar to the Ser/Lys dyad, 30 is found at the active

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universitť de

    1 High Performance Plasma Sputtered Fuel Cell Electrodes with Ultra Low catalytic metal Loadings C in plasma fuel cell deposition devices. Pt loadings lower than 0.01 mg cm-2 have been realized. The Pt density of 250 kW gPt -1 . 1-Introduction The great potential for the fuel cell technology to overcome

  12. Polarization modulation infrared reflection absorption spectroscopy for heterogeneous catalytic applications at elevated pressures†

    E-Print Network [OSTI]

    Ozensoy, Emrah

    2005-08-29

    morphologies such as metal nanoparticles deposited on a metal-oxide thin film. In order to achieve a molecular understanding of the properties of CO+NO catalytic reaction at elevated temperatures and pressures on Pd based catalysts, adsorption trends of each...

  13. Identification of the Catalytic Mechanism and Estimation of Kinetic Parameters for Fumarase*S

    E-Print Network [OSTI]

    mechanism and design a series of experiments to estimate the model parameters and identify the major flux elementary reaction steps shown in Fig. 1A. In this proposed mechanism, a hydrogen ion and fumarate moleculeIdentification of the Catalytic Mechanism and Estimation of Kinetic Parameters for Fumarase

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

    E-Print Network [OSTI]

    Iglesia, Enrique

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

  15. Correlating Catalytic Methanol Oxidation with the Structure and Oxidation State of Size-Selected Pt Nanoparticles

    E-Print Network [OSTI]

    Kik, Pieter

    Correlating Catalytic Methanol Oxidation with the Structure and Oxidation State of Size-Selected Pt nanoparticles (NPs) prepared by micelle encapsulation and supported on -Al2O3 during the oxidation of methanol the pretreatment. KEYWORDS: platinum, methanol oxidation, operando, XAFS, EXAFS, XANES, alumina, nanoparticle, size

  16. Performance of randomized Kelvin cell structures as catalytic substrates: Mass-transfer based analysis

    E-Print Network [OSTI]

    Daraio, Chiara

    t Open cell foams are attractive materials for various industrial applications, but building accurate industrial applications like filters, heat exchangers and catalytic reactors. As a catalyst support (Giani et al., 2005a). In the field of automotive catalysts a critical parameter is the pressure drop

  17. In Situ Polarization Modulation Infrared Reflection Absorption Spectroscopic and Kinetic Investigations of Heterogeneous Catalytic Reactions†

    E-Print Network [OSTI]

    Cai, Yun

    2010-01-14

    below the temperature previously reported. Characterizations of highly catalytically active Au films have also been carried out. Electronic and chemical properties of (1 x 1)- and (1 x 3)-Au/TiOx/Mo(112) films are investigated by PM-IRAS using CO as a...

  18. SWNT Synthesis by Carbon Monoxide Catalytic Thermal CVD (COCCVD) Method Toshiaki NISHII1,2

    E-Print Network [OSTI]

    Maruyama, Shigeo

    plants. Furthermore, carbon dioxide gas is exhausted from most industrial plants as one of Greenhouse. (2) R. Saito, G. Dresselhaus, M. S. Dresselhaus, Physical Properties of Carbon Nanotubes, (1988 CVD SWNT Synthesis by Carbon Monoxide Catalytic Thermal CVD (COCCVD) Method * Toshiaki

  19. Catalytic Conversion of Ethanol to Hydrogen Using Combinatorial Shici Duan and Selim Senkan*

    E-Print Network [OSTI]

    Senkan, Selim M.

    Catalytic Conversion of Ethanol to Hydrogen Using Combinatorial Methods Shici Duan and Selim Senkan* Department of Chemical Engineering, University of California, Los Angeles, California 90095-1532 Ethanol in this area focused on steam reforming of ethanol at relatively high temperatures (T > 500 įC), where carbon

  20. DOI: 10.1002/chem.200700579 Selective Catalytic Oxidation of Ethanol to Acetic Acid on Dispersed

    E-Print Network [OSTI]

    Iglesia, Enrique

    DOI: 10.1002/chem.200700579 Selective Catalytic Oxidation of Ethanol to Acetic Acid on Dispersed Mo, such as acetaldehyde and acetic acid, currently produced from ethane, ethene, or methanol. Pd-based catalysts convert ethanol≠O2 reactants to acetic acid, but with low reaction rates and modest selectivities (433 K, 70