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1

Membrane shape as a reporter for applied forces  

Science Journals Connector (OSTI)

...reconstruction microscopy . Science 319 : 810 – 813...cell membranes . Science 175 : 720 – 731...applied forces. | Recent advances have enabled...Mechanical and Aerospace Engineering and...and vesicles. Advances in Physics...

Heun Jin Lee; Eric L. Peterson; Rob Phillips; William S. Klug; Paul A. Wiggins

2008-01-01T23:59:59.000Z

2

Institute for Critical Technology and Applied Science Seminar Series Polymer Membranes for Energy and  

E-Print Network (OSTI)

Institute for Critical Technology and Applied Science Seminar Series Polymer Membranes for Energyst century for reliable, sustainable, efficient access to clean energy and clean water for Excellence in Industrial Gases Technology (2008), and the Strategic Environmental Research and Development

Crawford, T. Daniel

3

Magic angle spinning NMR applied to membrane protein 2D crystals : the structure and function of VDAC  

E-Print Network (OSTI)

Membrane proteins mediate critical functions in biological systems and are important drug targets for a number of diseases. Determining the three-dimensional structure and function of membrane proteins under physologically ...

Eddy, Matthew T. (Matthew Thomas)

2012-01-01T23:59:59.000Z

4

APPLIED PHYSICS APPLIED PHYSICS  

E-Print Network (OSTI)

MSc APPLIED PHYSICS #12;MSc APPLIED PHYSICS This taught Masters course is based on the strong research in Applied Physics in the University's Department of Physics. The department has an impressive photonics and quantum optics, Physics and the Life Sciences, and solid state physics. The knowledge gained

Mottram, Nigel

5

Composite carbon-ceramic hollow fiber membranes  

SciTech Connect

This work describes the synthesis of a new type of composite membrane by applying porous ceramic layers onto the surface of carbon membranes using the sol-gel process. The pore structure is discussed.

Linkov, V.M.; Kaiser, K.; Sanderson, R.; Lapidus, A.L. [Rossiiskaya Akademiya, Nauk (Russian Federation)

1994-12-31T23:59:59.000Z

6

Microporous Inorganic Membranes for Hydrogen Purification  

NLE Websites -- All DOE Office Websites (Extended Search)

Microporous Microporous Inorganic Membranes for Hydrogen Purification Brian L. Bischoff, Roddie R. Judkins, and Timothy R. Armstrong Oak Ridge National Laboratory Presented at: DOE Workshop on Hydrogen Separations and Purification Technologies Arlington, Virginia September 8, 2004 2 OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY Hydrogen Separation Membranes * Non-Porous - Palladium based films - Ion transport membranes * Porous - Ordered microporous membranes (IUPAC Recommendations 2001), e.g. zeolite membranes - Microporous membranes 3 OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY Microporous Membranes * IUPAC defines micropores as pores smaller than 2nm in diameter * Generally a microporous membrane is made by applying 1 to 3 thin layers to a porous support * Porous support can be ceramic or metallic

7

Vibration of an infinite membrane supported by an array of posts  

Science Journals Connector (OSTI)

...Copyright 2000 Article Vibration of an infinite membrane supported...East Lansing, MI 48824, USA The vibration of an infinite membrane supported...an asymptotic formula. membrane, vibration| IMA Journal of Applied Mathematics......

CY Wang

2000-06-01T23:59:59.000Z

8

Membrane magic  

SciTech Connect

The Kansas Power and Light Co.'s La Cyne generating station has found success with membrane filtration water pretreatment technology. The article recounts the process followed in late 2004 to install a Pall Aria 4 microfilter in Unit 1 makeup water system at the plant to produce cleaner water for reverse osmosis feed. 2 figs., 2 photos.

Buecker, B. [Kansas City Power and Light Co. (United States)

2005-09-01T23:59:59.000Z

9

Interrelated Effects of Aeration and Mixed Liquor Fractions on Membrane Fouling for Submerged Membrane Bioreactor Processes in Wastewater Treatment  

Science Journals Connector (OSTI)

Interrelated Effects of Aeration and Mixed Liquor Fractions on Membrane Fouling for Submerged Membrane Bioreactor Processes in Wastewater Treatment ... using hollow fibers was applied to wastewater treated by the activated-sludge process. ...

Fengshen Fan; Hongde Zhou

2007-02-21T23:59:59.000Z

10

Advanced membrane electrode assemblies for fuel cells  

DOE Patents (OSTI)

A method of preparing advanced membrane electrode assemblies (MEA) for use in fuel cells. A base polymer is selected for a base membrane. An electrode composition is selected to optimize properties exhibited by the membrane electrode assembly based on the selection of the base polymer. A property-tuning coating layer composition is selected based on compatibility with the base polymer and the electrode composition. A solvent is selected based on the interaction of the solvent with the base polymer and the property-tuning coating layer composition. The MEA is assembled by preparing the base membrane and then applying the property-tuning coating layer to form a composite membrane. Finally, a catalyst is applied to the composite membrane.

Kim, Yu Seung; Pivovar, Bryan S

2014-02-25T23:59:59.000Z

11

CX-000591: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exclusion Determination 25A2936 - Carbon Nanotube Membranes for Energy-Efficient Carbon Sequestration CX(s) Applied: B3.6 Date: 12152009 Location(s): California...

12

CX-003132: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Georgia Institute of Technology Research Corporation - Metal Organic Frameworks in Hollow Fiber Membranes for Carbon Dioxide Capture CX(s) Applied: B3.6 Date: 06022010...

13

CX-003663: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exclusion Determination CX-003663: Categorical Exclusion Determination Oxy-combustion Oxygen Transport Membrane Development CX(s) Applied: B3.6 Date: 08272010 Location(s):...

14

CX-003675: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exclusion Determination CX-003675: Categorical Exclusion Determination Oxy-combustion Oxygen Transport Membrane Development CX(s) Applied: B3.6 Date: 09012010 Location(s):...

15

CX-003877: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

77: Categorical Exclusion Determination CX-003877: Categorical Exclusion Determination Hybrid MembraneAbsorption Process for Post-Combustion Carbon Dioxide Capture CX(s) Applied:...

16

CX-003876: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Categorical Exclusion Determination CX-003876: Categorical Exclusion Determination Hybrid MembraneAbsorption Process for Post-Combustion Carbon Dioxide Capture CX(s) Applied:...

17

The model of stress distribution in polymer electrolyte membrane  

E-Print Network (OSTI)

An analytical model of mechanical stress in a polymer electrolyte membrane (PEM) of a hydrogen/air fuel cell with porous Water Transfer Plates (WTP) is developed in this work. The model considers a mechanical stress in the membrane is a result of the cell load cycling under constant oxygen utilization. The load cycling causes the cycling of the inlet gas flow rate, which results in the membrane hydration/dehydration close to the gas inlet. Hydration/dehydration of the membrane leads to membrane swelling/shrinking, which causes mechanical stress in the constrained membrane. Mechanical stress results in through-plane crack formation. Thereby, the mechanical stress in the membrane causes mechanical failure of the membrane, limiting fuel cell lifetime. The model predicts the stress in the membrane as a function of the cell geometry, membrane material properties and operation conditions. The model was applied for stress calculation in GORE-SELECT.

Atrazhev, Vadim V; Dmitriev, Dmitry V; Erikhman, Nikolay S; Sultanov, Vadim I; Patterson, Timothy; Burlatsky, Sergei F

2014-01-01T23:59:59.000Z

18

The model of stress distribution in polymer electrolyte membrane  

E-Print Network (OSTI)

An analytical model of mechanical stress in a polymer electrolyte membrane (PEM) of a hydrogen/air fuel cell with porous Water Transfer Plates (WTP) is developed in this work. The model considers a mechanical stress in the membrane is a result of the cell load cycling under constant oxygen utilization. The load cycling causes the cycling of the inlet gas flow rate, which results in the membrane hydration/dehydration close to the gas inlet. Hydration/dehydration of the membrane leads to membrane swelling/shrinking, which causes mechanical stress in the constrained membrane. Mechanical stress results in through-plane crack formation. Thereby, the mechanical stress in the membrane causes mechanical failure of the membrane, limiting fuel cell lifetime. The model predicts the stress in the membrane as a function of the cell geometry, membrane material properties and operation conditions. The model was applied for stress calculation in GORE-SELECT.

Vadim V. Atrazhev; Tatiana Yu. Astakhova; Dmitry V. Dmitriev; Nikolay S. Erikhman; Vadim I. Sultanov; Timothy Patterson; Sergei F. Burlatsky

2014-01-17T23:59:59.000Z

19

Membrane-patch Excision  

Science Journals Connector (OSTI)

Mechanical manipulation of the cell using glass micropipettes that leads to the extraction of a narrow region of cell membrane. The excision can lead to an isolated membrane patch in which the side of the membran...

2009-01-01T23:59:59.000Z

20

Membrane cleaning in membrane bioreactors: A review  

Science Journals Connector (OSTI)

Abstract Membrane bioreactors (MBRs) have been widely used in wastewater treatment and reclamation. Membrane cleaning is an essential part during the operation of \\{MBRs\\} since membrane fouling is an unavoidable problem. In past decades, with the in-depth understanding on membrane fouling, significant advances in membrane cleaning have been achieved. However, a comprehensive review on membrane cleaning in \\{MBRs\\} is still lacking. This paper attempts to critically review the recent developments of membrane cleaning. Firstly, the fouling and cleaning fundamentals are addressed, and then a comprehensive review on physical, chemical, and biological/biochemical cleaning is presented. The procedures of determining proper cleaning protocols for MBR systems are also proposed. Finally, the existing challenges and future research efforts are discussed in order to ensure the development of membrane cleaning toward a more effective and sustainable way in MBRs.

Zhiwei Wang; Jinxing Ma; Chuyang Y. Tang; Katsuki Kimura; Qiaoying Wang; Xiaomeng Han

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Microcomposite Fuel Cell Membranes  

Energy.gov (U.S. Department of Energy (DOE))

Summary of microcomposite fuel cell membrane work presented to the High Temperature Membrane Working Group Meeting, Orlando FL, October 17, 2003

22

Membrane-Transistor Cable  

Science Journals Connector (OSTI)

Membrane-Transistor Cable ... The system is the basis for a development of bioelectronic transducers and for the study of nonlinear phenomena in membrane cables. ...

Marion Rentschler; Peter Fromherz

1998-01-20T23:59:59.000Z

23

Reactor process using metal oxide ceramic membranes  

DOE Patents (OSTI)

A reaction vessel for use in photoelectrochemical reactions includes as its reactive surface a metal oxide porous ceramic membrane of a catalytic metal such as titanium. The reaction vessel includes a light source and a counter electrode. A provision for applying an electrical bias between the membrane and the counter electrode permits the Fermi levels of potential reaction to be favored so that certain reactions may be favored in the vessel. The electrical biasing is also useful for the cleaning of the catalytic membrane. Also disclosed is a method regenerating a porous metal oxide ceramic membrane used in a photoelectrochemical catalytic process by periodically removing the reactants and regenerating the membrane using a variety of chemical, thermal, and electrical techniques. 2 figures.

Anderson, M.A.

1994-05-03T23:59:59.000Z

24

Applied Science  

NLE Websites -- All DOE Office Websites (Extended Search)

Applied Science Applied Science Correlation of predicted and measured iron oxidation states in mixed iron oxides H. D. Rosenfeld and W. L. Holstein Development of a quantitative measurement of a diesel spray core using synchrotron x-rays C.F. Powell, Y. Yue, S. Gupta, A. McPherson, R. Poola, and J. Wang Localized phase transformations by x-ray-induced heating R.A. Rosenberg, Q. Ma, W. Farrell, E.D. Crozier, G.J. Soerensen, R.A. Gordon, and D.-T. Jiang Resonant x-ray scattering at the Se edge in ferroelectric liquid crystal materials L. Matkin, H. Gleeson, R. Pindak, P. Mach, C. Huang, G. Srajer, and J. Pollmann Synchrotron-radiation-induced anisotropic wet etching of GaAs Q. Ma, D.C. Mancini, and R.A. Rosenberg Synchrotron-radiation-induced, selective-area deposition of gold on

25

Oxygen Transport Ceramic Membranes  

SciTech Connect

The present quarterly report describes some of the investigations on the structural properties of dense OTM bars provided by Praxair and studies on newer composition of Ti doped LSF. In this report, in situ neutron diffraction was used to characterize the chemical and structural properties of La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-{delta}} (here after as L2SF55T) specimen, which was subject to measurements of neutron diffraction from room temperature to 900 C. It was found that space group of R3c yielded a better refinement than a cubic structure of Pm3m. Oxygen occupancy was nearly 3 in the region from room temperature to 700 C, above which the occupancy decreased due to oxygen loss. Dense OTM bars provided by Praxair were loaded to fracture at varying stress rates. Studies were done at room temperature in air and at 1000 C in a specified environment to evaluate slow crack growth behavior. The X-Ray data and fracture mechanisms points to non-equilibrium decomposition of the LSFCO OTM membrane. The non-equilibrium conditions could probably be due to the nature of the applied stress field (stressing rates) and leads to transition in crystal structures and increased kinetics of decomposition. The formations of a Brownmillerite or Sr2Fe2O5 type structures, which are orthorhombic are attributed to the ordering of oxygen vacancies. The cubic to orthorhombic transitions leads to 2.6% increase in strains and thus residual stresses generated could influence the fracture behavior of the OTM membrane. Continued investigations on the thermodynamic properties (stability and phase-separation behavior) and total conductivity of prototype membrane materials were carried out. The data are needed together with the kinetic information to develop a complete model for the membrane transport. Previously characterization, stoichiometry and conductivity measurements for samples of La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-{delta}} were reported. In this report, measurements of the chemical and thermal expansion as a function of temperature and p{sub O2} are described.

S. Bandopadhyay; N. Nagabhushana; X.-D Zhou; Q. Cai; J. Yang; W.B. Yelon; W.J. James; H.U. Anderson; Alan Jacobson; C.A. Mims

2004-05-01T23:59:59.000Z

26

New possibilities of electroinduced membrane gas and vapor separation  

SciTech Connect

A novel membrane technique to effect electroinduced facilitated transport of neutral molecules in ion-exchange membranes was suggested. Experiments have been carried out with platinum-coated Nafion membranes in Cu{sup 2+}/Cu{sup 1+} form. This may be a potential technique for the separation of olefin/paraffin mixtures. It was shown that by applying an electric current to the membrane the permeability of ethylene increased 6-fold, compared to the permeability of the initial Pt-coated membrane without current.

Bessarabov, D.G.; Sanderson, R.D. [Univ. of Stellenbosch (South Africa). Inst. for Polymer Science] [Univ. of Stellenbosch (South Africa). Inst. for Polymer Science; Valuev, V.V.; Popkov, Y.M.; Timashev, S.F. [Karpov Inst. of Physical Chemistry, Moscow (Russian Federation)] [Karpov Inst. of Physical Chemistry, Moscow (Russian Federation)

1997-06-01T23:59:59.000Z

27

Composite zeolite membranes  

DOE Patents (OSTI)

A new class of composite zeolite membranes and synthesis techniques therefor has been invented. These membranes are essentially defect-free, and exhibit large levels of transmembrane flux and of chemical and isotopic selectivity.

Nenoff, Tina M. (Albuquerque, NM); Thoma, Steven G. (Albuquerque, NM); Ashley, Carol S. (Albuquerque, NM); Reed, Scott T. (Albuquerque, NM)

2002-01-01T23:59:59.000Z

28

Membrane Technology Workshop  

Energy.gov (U.S. Department of Energy (DOE))

At the Membrane Technology Workshop (held July 24, 2012, in Rosemont, IL), stakeholders from industry and academia explored the status of membrane research and development (R&D). Participants...

29

Membrane Technology Workshop  

Energy.gov (U.S. Department of Energy (DOE))

At the Membrane Technology Workshop (held July 24, 2012, in Rosemont, IL), stakeholders from industry and academia explored the status of membrane research and development (R&D). Participants ...

30

Hybrid adsorptive membrane reactor  

DOE Patents (OSTI)

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

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

2011-03-01T23:59:59.000Z

31

Supertubes and Superconducting Membranes  

SciTech Connect

We show the equivalence between configurations that arise from string theory of type IIA, called supertubes, and superconducting membranes at the bosonic level. We find equilibrium and oscillating configurations for a tubular membrane carrying a current along its axis.

Cordero, Ruben; Miguel-Pilar, Zelin [Departamento de Fisica, Escuela Superior de Fisica y Matematicas del IPN, Edificio 9, Unidad Profesional 'Adolfo Lopez Mateos', Zacatenco, 07738 Mexico D.F. (Mexico)

2007-02-09T23:59:59.000Z

32

Membrane Separations Research  

E-Print Network (OSTI)

MEMBRANE SEPARATIONS RESEARCH James R. Fair Chemical Engineering Department The University of Texas at Austin Austin, TX 78712 ABSTRACT The use of membranes for separating gaseous and liquid mixtures has grown dramatically in the past 15... years. Applications have been dominated by light gas separations and water purification. During this pioneering period, equipment containing the membrane suIfaces has been developed to a point where failures are minimal and the membranes themselves...

Fair, J. R.

33

Membrane Technology Workshop  

Energy.gov (U.S. Department of Energy (DOE))

Presentation by Charles Page (Air Products & Chemicals, Inc.) for the Membrane Technology Workshop held July 24, 2012

34

Polyphosphazene semipermeable membranes  

DOE Patents (OSTI)

A semipermeable, inorganic membrane is disclosed; the membrane is prepared from a phosphazene polymer and, by the selective substitution of the constituent groups bound to the phosphorous in the polymer structure, the selective passage of fluid from a feedstream can be controlled. Resistance to high temperatures and harsh chemical environments is observed in the use of the phosphazene polymers as semipermeable membranes.

Allen, Charles A. (Idaho Falls, ID); McCaffrey, Robert R. (Idaho Falls, ID); Cummings, Daniel G. (Idaho Falls, ID); Grey, Alan E. (Idaho Falls, ID); Jessup, Janine S. (Darlington, ID); McAtee, Richard E. (Idaho Falls, ID)

1988-01-01T23:59:59.000Z

35

Enhanced membrane gas separations  

SciTech Connect

An improved membrane gas separation process is described comprising: (a) passing a feed gas stream to the non-permeate side of a membrane system adapted for the passage of purge gas on the permeate side thereof, and for the passage of the feed gas stream in a counter current flow pattern relative to the flow of purge gas on the permeate side thereof, said membrane system being capable of selectively permeating a fast permeating component from said feed gas, at a feed gas pressure at or above atmospheric pressure; (b) passing purge gas to the permeate side of the membrane system in counter current flow to the flow of said feed gas stream in order to facilitate carrying away of said fast permeating component from the surface of the membrane and maintaining the driving force for removal of the fast permeating component through the membrane from the feed gas stream, said permeate side of the membrane being maintained at a subatmospheric pressure within the range of from about 0.1 to about 5 psia by vacuum pump means; (c) recovering a product gas stream from the non-permeate side of the membrane; and (d) discharging purge gas and the fast permeating component that has permeated the membrane from the permeate side of the membrane, whereby the vacuum conditions maintained on the permeate side of the membrane by said vacuum pump means enhance the efficiency of the gas separation operation, thereby reducing the overall energy requirements thereof.

Prasad, R.

1993-07-13T23:59:59.000Z

36

Lipid membrane instability and poration driven by capacitive charging  

E-Print Network (OSTI)

A new model for the interaction of an electric pulse with a lipid membrane is proposed. Using this model we show that when a DC electric pulse is applied to an insulating lipid membrane separating fluids with different conductivities, the capacitive charging current through the membrane drives electrohydrodynamic flow that destabilizes the membrane. The instability is transient and decays as the membrane charges. The bulk conductivity mismatch plays an essential role in this instability because it results in a different rate of charge accumulation on the membrane's physical surfaces. Shearing stresses created by the electric field acting on its own induced free charge are non-zero as long as the charge imbalance exists. Accordingly, the most unstable mode is related to the ratio of membrane charging time and the electrohydrodynamic time.

Jonathan T. Schwalbe; Petia M. Vlahovska; Michael J. Miksis

2010-05-03T23:59:59.000Z

37

Substituted polyacetylene separation membrane  

DOE Patents (OSTI)

A separation membrane is described which is useful for gas separation, particularly separation of C{sub 2+} hydrocarbons from natural gas. The invention encompasses the membrane itself, methods of making it and processes for using it. The membrane comprises a polymer having repeating units of a hydrocarbon-based, disubstituted polyacetylene, having the general formula shown in the accompanying diagram, wherein R{sub 1} is chosen from the group consisting of C{sub 1}-C{sub 4} alkyl and phenyl, and wherein R{sub 2} is chosen from the group consisting of hydrogen and phenyl. In the most preferred embodiment, the membrane comprises poly(4-methyl-2-pentyne) [PMP]. The membrane exhibits good chemical resistance and has super-glassy properties with regard to separating certain large, condensable permeant species from smaller, less-condensable permeant species. The membranes may also be useful in other fluid separations. 4 figs.

Pinnau, I.; Morisato, Atsushi

1998-01-13T23:59:59.000Z

38

Substituted polyacetylene separation membrane  

DOE Patents (OSTI)

A separation membrane useful for gas separation, particularly separation of C.sub.2+ hydrocarbons from natural gas. The invention encompasses the membrane itself, methods of making it and processes for using it. The membrane comprises a polymer having repeating units of a hydrocarbon-based, disubstituted polyacetylene, having the general formula: ##STR1## wherein R.sub.1 is chosen from the group consisting of C.sub.1 -C.sub.4 alkyl and phenyl, and wherein R.sub.2 is chosen from the group consisting of hydrogen and phenyl. In the most preferred embodiment, the membrane comprises poly(4-methyl-2-pentyne) ›PMP!. The membrane exhibits good chemical resistance and has super-glassy properties with regard to separating certain large, condensable permeant species from smaller, less-condensable permeant species. The membranes may also be useful in other fluid separations.

Pinnau, Ingo (Palo Alto, CA); Morisato, Atsushi (Tokyo, JP)

1998-01-13T23:59:59.000Z

39

Model Cell Membranes  

Science Journals Connector (OSTI)

... are being used as model systems to test particular hypotheses in membrane transport. Thus, Tosteson and his colleagues (Andreoli et al., J. Gen. PhysioL, 50, 1729; ...

A Correspondent

1968-01-13T23:59:59.000Z

40

Anion exchange membrane  

DOE Patents (OSTI)

An anion exchange membrane and fuel cell incorporating the anion exchange membrane are detailed in which proazaphosphatrane and azaphosphatrane cations are covalently bonded to a sulfonated fluoropolymer support along with anionic counterions. A positive charge is dispersed in the aforementioned cations which are buried in the support to reduce the cation-anion interactions and increase the mobility of hydroxide ions, for example, across the membrane. The anion exchange membrane has the ability to operate at high temperatures and in highly alkaline environments with high conductivity and low resistance.

Verkade, John G; Wadhwa, Kuldeep; Kong, Xueqian; Schmidt-Rohr, Klaus

2013-05-07T23:59:59.000Z

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Membrane module assembly  

DOE Patents (OSTI)

A membrane module assembly is described which is adapted to provide a flow path for the incoming feed stream that forces it into prolonged heat-exchanging contact with a heating or cooling mechanism. Membrane separation processes employing the module assembly are also disclosed. The assembly is particularly useful for gas separation or pervaporation. 2 figures.

Kaschemekat, J.

1994-03-15T23:59:59.000Z

42

OXYGEN TRANSPORT CERAMIC MEMBRANES  

SciTech Connect

This report covers the following tasks: Task 1--Design, fabricate and evaluate ceramic to metal seals based on graded ceramic powder/metal braze joints; Task 2--Evaluate the effect of defect configuration on ceramic membrane conductivity and long term chemical and structural stability; Task 3--Determine materials mechanical properties under conditions of high temperatures and reactive atmospheres; Task 4--Evaluate phase stability and thermal expansion of candidate perovskite membranes and develop techniques to support these materials on porous metal structures; Task 5--Assess the microstructure of membrane materials to evaluate the effects of vacancy-impurity association, defect clusters, and vacancy-dopant association on the membrane performance and stability; and Task 6--Measure kinetics of oxygen uptake and transport in ceramic membrane materials under commercially relevant conditions using isotope labeling techniques.

Dr. Sukumar Bandopadhyay; Dr. Nagendra Nagabhushana

2002-04-01T23:59:59.000Z

43

Photo-induced potentials across a polymer stabilzied planar membrane, in the presence of bacteriorhodopsin  

Science Journals Connector (OSTI)

Black lipid planar membranes were prepared by incorporating polymers such as polystyrene in a membrane forming solution. The polymerincorporated planar membranes showed greater stability to applied electric fields and have longer lifertimes. Photopotentials were studied under several conditions; with bacteriorhodopsin in the planar membrane; with bacteriorhodopsin in liposomes; with bacteriorhodopsin fragments in suspension; and with bacteriorhodopsin both in the planar membrane and in liposomes. Skulachev's laboratory has reported that bacteriorhodopsin-liposomes develop potentials across a black lipid planar membrane. In our studies, because the polymer incorporated planar membranes are very stable, it was possible to obtain somewhat larger photopotentials in the presence of bacteriorhodopsin ranging between 30–500 mV. The enhancement of bacteriorhodopsin catalyzed photopotentials, found in the presence of Ca++ (or other bivalent cations) and/or applied electric fields, appeared to result from an orientation effect of bacteriorhodopsin at the membrane interface.

Paul Shieh; Lester Packer

1976-01-01T23:59:59.000Z

44

Mathematical modeling of liquid/liquid hollow fiber membrane contactor accounting for interfacial transport phenomena: Extraction of lanthanides as a surrogate for actinides  

SciTech Connect

This report is divided into two parts. The second part is divided into the following sections: experimental protocol; modeling the hollow fiber extractor using film theory; Graetz model of the hollow fiber membrane process; fundamental diffusive-kinetic model; and diffusive liquid membrane device-a rigorous model. The first part is divided into: membrane and membrane process-a concept; metal extraction; kinetics of metal extraction; modeling the membrane contactor; and interfacial phenomenon-boundary conditions-applied to membrane transport.

Rogers, J.D.

1994-08-04T23:59:59.000Z

45

Original article Flat ceramic membranes  

E-Print Network (OSTI)

membranes. The orig- inal intellectual concept is protected by two international patents. Strategically of investment and functioning costs while keeping the interest of ceramics. ceramic membrane / plate / tubular

Paris-Sud XI, Université de

46

High Temperature Membrane Working Group  

Energy.gov (U.S. Department of Energy (DOE))

The High Temperature Membrane Working Group consists of government, industry, and university researchers interested in developing high temperature membranes for fuel cells.

47

Ordered ceramic membranes  

SciTech Connect

Ceramic membranes have been formed from colloidal sols coated on porous clay supports. These supported membranes have been characterized in terms of their permeabilities and permselectivities to various aqueous test solutions. The thermal stabilities and pore structures of these membranes have been characterized by preparing unsupported membranes of the correpsonding material and performing N{sub 2} adsorption-desorption and X-ray diffraction studies on these membranes. To date, membranes have been prepared from a variety of oxides, including TiO{sub 2}, SiO{sub 2}, ZrO{sub 2}, and Al{sub 2}O{sub 3}, as well as Zr-, Fe-, and Nb-doped TiO{sub 2}. In many of these membranes pore diameters are less than 2 nm, while in others the pore diameters are between 3 and 5 nm. Procedures for fabricating porous clay supports with reproducible permeabilities for pure water are also discussed. 30 refs., 59 figs., 22 tabs.

Anderson, M.A.; Hill, C.G. Jr.; Zeltner, W.A.

1991-10-01T23:59:59.000Z

48

Catalytic nanoporous membranes  

DOE Patents (OSTI)

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.

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

2013-08-27T23:59:59.000Z

49

CENTRIFUGAL MEMBRANE FILTRATION  

SciTech Connect

The overall project consists of several integrated research phases related to the applicability, continued development, demonstration, and commercialization of the SpinTek centrifugal membrane filtration process. Work performed during this reporting period consisted of Phase 2 evaluation of the SpinTek centrifugal membrane filtration technology and Phase 3, Technology Partnering. During Phase 1 testing conducted at the EERC using the SpinTek ST-IIL unit operating on a surrogate tank waste, a solids cake developed on the membrane surface. The solids cake was observed where linear membrane velocities were less than 17.5 ft/s and reduced the unobstructed membrane surface area up to 25%, reducing overall filtration performance. The primary goal of the Phase 2 research effort was to enhance filtration performance through the development and testing of alternative turbulence promoter designs. The turbulence promoters were designed to generate a shear force across the entire membrane surface sufficient to maintain a self-cleaning membrane capability and improve filtration efficiency and long-term performance. Specific Phase 2 research activities included the following: System modifications to accommodate an 11-in.-diameter, two-disk rotating membrane assembly; Development and fabrication of alternative turbulence promoter designs; Testing and evaluation of the existing and alternative turbulence promoters under selected operating conditions using a statistically designed test matrix; and Data reduction and analysis; The objective of Phase 3 research was to demonstrate the effectiveness of SpinTek's centrifugal membrane filtration as a pretreatment to remove suspended solids from a liquid waste upstream of 3M's WWL cartridge technology for the selective removal of technetium (Tc).

Daniel J. Stepan; Bradley G. Stevens; Melanie D. Hetland

1999-10-01T23:59:59.000Z

50

Composite metal membrane  

DOE Patents (OSTI)

A composite metal membrane including a first metal layer of Group IVB met or Group VB metals, the first metal layer sandwiched between two layers of an oriented metal of palladium, platinum or alloys thereof is provided together with a process for the recovery of hydrogen from a gaseous mixture including contacting a hydrogen-containing gaseous mixture with a first side of a nonporous composite metal membrane including a first metal of Group IVB metals or Group VB metals, the first metal layer sandwiched between two layers of an oriented metal of palladium, platinum or alloys thereof, and, separating hydrogen from a second side of the nonporous composite metal membrane.

Peachey, Nathaniel M. (Espanola, NM); Dye, Robert C. (Los Alamos, NM); Snow, Ronny C. (Los Alamos, NM); Birdsell, Stephan A. (Los Alamos, NM)

1998-01-01T23:59:59.000Z

51

Composite metal membrane  

DOE Patents (OSTI)

A composite metal membrane including a first metal layer of Group IVB met or Group VB metals, the first metal layer sandwiched between two layers of an oriented metal of palladium, platinum or alloys thereof is provided together with a process for the recovery of hydrogen from a gaseous mixture including contacting a hydrogen-containing gaseous mixture with a first side of a nonporous composite metal membrane including a first metal of Group IVB metals or Group VB metals, the first metal layer sandwiched between two layers of an oriented metal of palladium, platinum or alloys thereof, and, separating hydrogen from a second side of the nonporous composite metal membrane.

Peachey, N.M.; Dye, R.C.; Snow, R.C.; Birdsell, S.A.

1998-04-14T23:59:59.000Z

52

A membrane interferometer  

Science Journals Connector (OSTI)

...bilayer membranes from lipid monolayers. A critique . Biophys J 16 : 481 – 489 . Acknowledgments We thank Profs. Nick Melosh, Merritt Maduke, and Stephen White for useful insights and suggestions. The Cy5-DNA-lipid conjugate was synthesized...

Prasad V. Ganesan; Steven G. Boxer

2009-01-01T23:59:59.000Z

53

Wrinkling in polygonal membranes  

E-Print Network (OSTI)

boundary conditions of the polygons. When pressurised, the polygonal membranes naturally reach a parabolic shape towards their centre, the extent of which varies greatly depending on a large number of parameters, including most particularly pre...

Bonin, Arnaud Stephane

2012-02-07T23:59:59.000Z

54

Reverse Osmosis Membranes  

Science Journals Connector (OSTI)

A bibliography of citations from the U.S. National Technical Information Service data base with 183 abstracts on membranes for reverse osmosis desalination, electro-dialysis desalination and other osmotic desa...

Prof. Dr. Anthony Delyannis; Dr. Euridike-Emmy Delyannis

1980-01-01T23:59:59.000Z

55

OXYGEN TRANSPORT CERAMIC MEMBRANES  

SciTech Connect

This is the third quarterly report on oxygen Transport Ceramic Membranes. In the following, the report describes the progress made by our university partners in Tasks 1 through 6, experimental apparatus that was designed and built for various tasks of this project, thermodynamic calculations, where applicable and work planned for the future. (Task 1) Design, fabricate and evaluate ceramic to metal seals based on graded ceramic powder/metal braze joints. (Task 2) Evaluate the effect of defect configuration on ceramic membrane conductivity and long term chemical and structural stability. (Task 3) Determine materials mechanical properties under conditions of high temperatures and reactive atmospheres. (Task 4) Evaluate phase stability and thermal expansion of candidate perovskite membranes and develop techniques to support these materials on porous metal structures. (Task 5) Assess the microstructure of membrane materials to evaluate the effects of vacancy-impurity association, defect clusters, and vacancy-dopant association on the membrane performance and stability. (Task 6) Measure kinetics of oxygen uptake and transport in ceramic membrane materials under commercially relevant conditions using isotope labeling techniques.

Dr. Sukumar Bandopadhyay; Dr. Nagendra Nagabhushana

2000-10-01T23:59:59.000Z

56

SUPPORTED DENSE CERAMIC MEMBRANES FOR OXYGEN SEPARATION  

SciTech Connect

Mixed-conducting membranes have the ability to conduct oxygen with perfect selectivity at elevated temperatures, which makes them an extremely attractive alternative for oxygen separation and membrane reactor applications. The ability to reliably fabricate these membranes in thin or thick films would enable solid-state divisional limitations to be minimized, thus providing higher oxygen flux. Based on that motivation, the overall objective for this project is to develop and demonstrate a strategy for the fabrication of supported Wick film ceramic mixed conducting membranes, and improve the understanding of the fundamental issues associated with reliable fabrication of these membranes. The project has focused on the mixed-conducting ceramic composition SrCo{sub 0.5}FeO{sub x} because of its superior permeability and stability in reducing atmospheres. The fabrication strategy employed involves the deposition of SrCo{sub 0.5}FeO{sub x} thick films onto porous supports of the same composition. In the second year of this project, we completed characterization of the sintering and phase behavior of the porous SrCo{sub 0.5}FeO{sub x} supports, leading to a standard support fabrication methodology. Using a doctor blade method, pastes made from aerosol-derived SrCo{sub 0.5}FeO{sub x} powder dispersed with polyethylene glycol were applied to the supports, and the sintering behavior of the thick film membranes was examined in air and nitrogen atmospheres. It has been demonstrated that the desired crystalline phase content can be produced in the membranes, and that the material in the membrane layer can be highly densified without densifying the underlying support. However, considerable cracking and opening of the film occurred when films densified to a high extent. The addition of MgO into the SrCo{sub 0.5}FeO{sub x} supports was shown to inhibit support sintering so that temperatures up to 1300 C, where significant liquid formation occurs, could be used for film sintering. This successfully reduced cracking, however the films retained open porosity. The investigation of this concept will be continued in the final year of the project. Investigation of a metal organic chemical vapor deposition (MOCVD) method for defect mending in dense membranes was also initiated. An appropriate metal organic precursor (iron tetramethylheptanedionate) was identified whose deposition can be controlled by access to oxygen at temperatures in the 280-300 C range. Initial experiments have deposited iron oxide, but only on the membrane surface; thus refinement of this method will continue.

Timothy L. Ward

2000-06-30T23:59:59.000Z

57

Concentration of marc extracts by membrane techniques  

Science Journals Connector (OSTI)

By-products obtained from red currant processing still contain large amounts of useful components, e.g. pectin. Pectin was extracted from red currant marc with water at a solid/liquid ratio of 1:10. To reduce the operating costs of further possessing, we concentrated the pectin solution by membrane separation, i.e. nanofiltration (NF) and reverse osmosis (RO). The objectives of our work were to study the effects of the operating pressure and cross-volume flow rate on the flux and on the membrane separation concentration ratio in order to establish the optimum operating conditions and to evaluate the contributions of the fouling, cake and membrane resistances to the overall resistance. Flat-sheet RO and a spiral-wound NF membrane were applied in the work. The conductivity, the color, the viscosity and the TSS of the permeate and the concentrate were followed during the measurements. Concentration by RO resulted in an increase of the TSS content to 4.28°Brix; for NF the corresponding level was 8.88°Brix. The membrane resistance and the fouling resistance were the determinant relative to the gel resistance.

C. Hodúr; Sz. Kertész; S. Beszédes; Zs. László; G. Szabó

2009-01-01T23:59:59.000Z

58

High Temperature Membrane Working Group  

Energy.gov (U.S. Department of Energy (DOE))

This presentation provides an overview of the High Temperature Membrane Working Group Meeting in May 2007.

59

Membrane fusion: Ready ? aim ? fire!  

Science Journals Connector (OSTI)

... All cells use a programme of membrane fusion and fission to assemble membranes, both internally and on their surface. Given that biological ... internally and on their surface. Given that biological membranes are essentially two-dimensional fluids, fusion must obey certain restrictions that prevent incompatible membranes from intermixing. Without such selective contact, ...

Randy Schekman

1998-12-10T23:59:59.000Z

60

Cable tensioned membrane solar collector module with variable tension control  

DOE Patents (OSTI)

Disclosed is a solar collector comprising a membrane for concentrating sunlight, a plurality of elongated structural members for suspending the membrane member thereon, and a plurality of control members for adjustably tensioning the membrane member, as well as for controlling a focus produced by the membrane members. Each control member is disposed at a different corresponding one of the plurality of structural members. The collector also comprises an elongated flexible tensioning member, which serves to stretch the membrane member and to thereafter hold it in tension, and a plurality of sleeve members, which serve to provide the membrane member with a desired surface contour during tensioning of the membrane member. The tensioning member is coupled to the structural members such that the tensioning member is adjustably tensioned through the structural members. The tensioning member is also coupled to the membrane member through the sleeve members such that the sleeve members uniformly and symmetrically stretch the membrane member upon applying tension to the tensioning member with the control members.

Murphy, Lawrence M. (Lakewood, CO)

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Cable tensioned membrane solar collector module with variable tension control  

DOE Patents (OSTI)

Disclosed is a solar collector comprising a membrane member for concentrating sunlight, a plurality of elongated structural members for suspending the membrane member thereon, and a plurality of control members for adjustably tensioning the membrane member, as well as for controlling a focus produced by the membrane members. Each control member is disposed at a different corresponding one of the plurality of structural members. The collector also comprises an elongated flexible tensioning member, which serves to stretch the membrane member and to thereafter hold it in tension, and a plurality of sleeve members which serve to provide the membrane member with a desired surface contour during tensioning of the membrane member. The tensioning member is coupled to the structural members such that the tensioning member is adjustably tensioned through the structural members. The tensioning member is also coupled to the membrane member through the sleeve members such that the sleeve members uniformly and symmetrically stretch the membrane member upon applying tension to the tensioning member with the control members.

Murphy, L.M.

1984-01-09T23:59:59.000Z

62

Oxygen Transport Ceramic Membranes  

SciTech Connect

The present quarterly report describes some of the investigations on the structural properties of dense OTM bars provided by Praxair and studies on newer composition of Ti doped LSF. In the current research, the electrical conductivity and Seebeck coefficient were measured as a function of temperature in air. Based on these measurements, the charge carrier concentration, net acceptor dopant concentration, activation energy of conduction and mobility were estimated. The studies on the fracture toughness of the LSFT and dual phase membranes at room temperature have been completed and reported previously. The membranes that are exposed to high temperatures at an inert and a reactive atmosphere undergo many structural and chemical changes which affects the mechanical properties. To study the effect of temperature on the membranes when exposed to an inert environment, the membranes (LAFT and Dual phase) were heat treated at 1000 C in air and N{sub 2} atmosphere and hardness and fracture toughness of the membranes were studied after the treatment. The indentation method was used to find the fracture toughness and the effect of the heat treatment on the mechanical properties of the membranes. Further results on the investigation of the origin of the slow kinetics on reduction of ferrites have been obtained. The slow kinetics appears to be related to a non-equilibrium reduction pathway that initially results in the formation of iron particles. At long times, equilibrium can be reestablished with recovery of the perovskite phase. 2-D modeling of oxygen movement has been undertaken in order to fit isotope data. The model will serve to study ''frozen'' profiles in patterned or composite membranes.

S. Bandopadhyay; T. Nithyanantham; X.-D Zhou; Y-W. Sin; H.U. Anderson; Alan Jacobson; C.A. Mims

2005-11-01T23:59:59.000Z

63

Thermodynamic Modeling of a Membrane Dehumidification System  

E-Print Network (OSTI)

by various industries: microfiltration, ultrafiltration, reverse osmosis, and electrodialysis [1]. In addition to these well established and common processes, two additional processes are increasingly being applied by industry: pervaporation and gas... of anion and cation exchange membranes. Electrodialysis is also commonly used in desalination processes and in the food industry [5]. Pervaporation is similar to both reverse osmosis and gas separation (discussed in the next section). Pervaporation...

Bynum, John 1983-

2012-11-28T23:59:59.000Z

64

Membrane heat pipe development for space radiator applications  

SciTech Connect

A self-deploying membrane heat pipe (SMHP) is being designed and fabricated to operate in an in-cabin experiment aboard a STS flight. The heat pipe comprises a mylar membrane with a woven fabric arterial wick and R-11 as the working fluid. Preliminary results indicate that this SMHP design will successfully expand and retract in response to an applied heat load; the retraction force is provided by a constant force spring.

Woloshun, K.; Merrigan, M.

1986-01-01T23:59:59.000Z

65

OXYGEN TRANSPORT CERAMIC MEMBRANES  

SciTech Connect

In the present quarter, oxygen transport perovskite ceramic membranes are evaluated for strength and fracture in oxygen gradient conditions. Oxygen gradients are created in tubular membranes by insulating the inner surface from the reducing environment by platinum foils. Fracture in these test conditions is observed to have a gradient in trans and inter-granular fracture as opposed to pure trans-granular fracture observed in homogeneous conditions. Fracture gradients are reasoned to be due to oxygen gradient set up in the membrane, variation in stoichiometry across the thickness and due to varying decomposition of the parent perovskite. The studies are useful in predicting fracture criterion in actual reactor conditions and in understanding the initial evolution of fracture processes.

Dr. Sukumar Bandopadhyay; Dr. Nagendra Nagabhushana

2002-07-01T23:59:59.000Z

66

Oxygen Transport Ceramic Membranes  

SciTech Connect

In this quarter a systematic analysis on the decomposition behavior of the OTM membranes at air and nitrogen were initiated to understand the structural and stoichiometric changes associated with elevated temperatures. Evaluation of the flexural strengths using 4-point bend test was also started for the dual phase membranes. Initial results on the synthesis of dual phase composite materials have been obtained. The measurements have focused on the compatibility of mixed conductors with the pure ionic conductors yttria stabilized zirconia (YSZ) and gadolinium doped ceria (GDC). The initial results obtained for three different mixed conductors suggest that (GDC) is the better choice. A new membrane permeation system has been designed and tested and sintering studies of biphasic systems are in progress.

S. Bandopadhyay; T. Nithyanantham; X.-D Zhou; Y-W. Sin; H.U. Anderson; Alan Jacobson; C.A. Mims

2006-05-01T23:59:59.000Z

67

Tunable water desalination across Graphene Oxide Framework membranes  

SciTech Connect

The performance of graphene oxide framework (GOF) membranes for water desalination is assessed using classical molecular dynamics (MD) simulations. The coupling between water permeability and salt rejection GOF membranes is studied as a function of linker concentration n, thickness h and applied pressure DP. The simulations reveal that water permeability in GOF-(n,h) membranes can be tuned from 5 (n = 32 and h = 6.5 nm) to 400 L/cm2/day/MPa (n = 64 and h = 2.5 nm) and follows the law Cnh an . For a given pore size (n = 16 or 32), water permeability of GOF membranes increases when the pore spacing decreases, whereas for a given pore spacing (n = 32 or 64), water permeability increases by up to two orders of magnitude when the pore size increases. Furthermore, for linker concentrations n 32, the high water permeability corresponds to a 100% salt rejection, elevating this type of GOF membrane as an ideal candidate for water desalination. Compared to experimental performance of reverse osmosis membranes, our calculations suggest that under the same conditions of applied pressure and characteristics of membranes (DP 10 MPa and h 100 nm), one can expect a perfect salt rejection coupled to a water permeability two orders of magnitude higher than existing technologies, i.e., from a few cL/cm2/day/MPa to a few L/cm2/day/MPa.

Nicolai, Adrien [Rensselaer Polytechnic Institute (RPI)] [Rensselaer Polytechnic Institute (RPI); Sumpter, Bobby G [ORNL] [ORNL; Meunier, V. [Rensselaer Polytechnic Institute (RPI)] [Rensselaer Polytechnic Institute (RPI)

2014-01-01T23:59:59.000Z

68

Surface tension in bilayer membranes with fixed projected area  

E-Print Network (OSTI)

We study the elastic response of bilayer membranes with fixed projected area to both stretching and shape deformations. A surface tension is associated to each of these deformations. By using model amphiphilic membranes and computer simulations, we are able to observe both the types of deformation, and thus, both the surface tensions, related to each type of deformation, are measured for the same system. These surface tensions are found to assume different values in the same bilayer membrane: in particular they vanish for different values of the projected area. We introduce a simple theory which relates the two quantities and successfully apply it to the data obtained with computer simulations.

Alberto Imparato

2006-04-05T23:59:59.000Z

69

theoretical and applied fracture  

E-Print Network (OSTI)

theoretical and applied fracture mechanics ELSEVIER Theoretical and Applied Fracture Mechanics 00 and Applied Fracture Mechanics 00 (1995) 000-000 Recently, some European countries developed defect specific. A suitable probabilistic fracture mechanic

Cizelj, Leon

70

Colloidal fouling of reverse osmosis membranes  

E-Print Network (OSTI)

the rate of fouling of reverse osmosis membranes treating32, 127-135. fouling of reverse osmosis membranes." Buros,Colloidal fouling of reverse osmosis membranes." J. Colloid

Elimelech, Menachem

1994-01-01T23:59:59.000Z

71

Composite oxygen transport membrane  

DOE Patents (OSTI)

A method of producing a composite oxygen ion membrane and a composite oxygen ion membrane in which a porous fuel oxidation layer and a dense separation layer and optionally, a porous surface exchange layer are formed on a porous support from mixtures of (Ln.sub.1-xA.sub.x).sub.wCr.sub.1-yB.sub.yO.sub.3-.delta. and a doped zirconia. In the porous fuel oxidation layer and the optional porous surface exchange layer, A is Calcium and in the dense separation layer A is not Calcium and, preferably is Strontium. Preferred materials are (La.sub.0.8Ca.sub.0.2).sub.0.95Cr.sub.0.5Mn.sub.0.5O.sub.3-.delta. for the porous fuel oxidation and optional porous surface exchange layers and (La.sub.0.8Sr.sub.0.2).sub.0.95Cr.sub.0.5Fe.sub.0.5O.sub.3-.delta. for the dense separation layer. The use of such materials allows the membrane to sintered in air and without the use of pore formers to reduce membrane manufacturing costs. The use of materials, as described herein, for forming the porous layers have application for forming any type of porous structure, such as a catalyst support.

Christie, Gervase Maxwell; Lane, Jonathan A.

2014-08-05T23:59:59.000Z

72

OXYGEN TRANSPORT CERAMIC MEMBRANES  

SciTech Connect

This is the fifth quarterly report on a new study to develop a ceramic membrane/metal joint. Results of wetting experiments on commercially available Nickel based brazing alloys on perovskite surfaces are described. Additionally, experimental and numerical investigations on the strength of concentric ceramic/metal joints are presented.

Dr. Sukumar Bandopadhyay; Dr. Nagendra Nagabhushana

2001-02-01T23:59:59.000Z

73

OXYGEN TRANSPORT CERAMIC MEMBRANES  

SciTech Connect

In the present quarter, the possibility of using a more complex interfacial engineering approach to the development of reliable and stable oxygen transport perovskite ceramic membranes/metal seals is discussed. Experiments are presented and ceramic/metal interactions are characterized. Crack growth and fracture toughness of the membrane in the reducing conditions are also discussed. Future work regarding this approach is proposed are evaluated for strength and fracture in oxygen gradient conditions. Oxygen gradients are created in tubular membranes by insulating the inner surface from the reducing environment by platinum foils. Fracture in these test conditions is observed to have a gradient in trans and inter-granular fracture as opposed to pure trans-granular fracture observed in homogeneous conditions. Fracture gradients are reasoned to be due to oxygen gradient set up in the membrane, variation in stoichiometry across the thickness and due to varying decomposition of the parent perovskite. The studies are useful in predicting fracture criterion in actual reactor conditions and in understanding the initial evolution of fracture processes.

Dr. Sukumar Bandopadhyay; Dr. Nagendra Nagabhushana

2003-01-01T23:59:59.000Z

74

Hydrogen-Selective Membrane  

DOE Patents (OSTI)

A hydrogen-selective membrane comprises a tubular porous ceramic support having a palladium metal layer deposited on an inside surface of the ceramic support. The thickness of the palladium layer is greater than about 10 .mu.m but typically less than about 20 .mu.m. The hydrogen permeation rate of the membrane is greater than about 1.0 moles/m.sup.2.s at a temperature of greater than about 500.degree. C. and a transmembrane pressure difference of about 1,500 kPa. Moreover, the hydrogen-to-nitrogen selectivity is greater than about 600 at a temperature of greater than about 500.degree. C. and a transmembrane pressure of about 700 kPa. Hydrogen can be separated from a mixture of gases using the membrane. The method may include the step of heating the mixture of gases to a temperature of greater than about 400.degree. C. and less than about 1000.degree. C. before the step of flowing the mixture of gases past the membrane. The mixture of gases may include ammonia. The ammonia typically is decomposed to provide nitrogen and hydrogen using a catalyst such as nickel. The catalyst may be placed inside the tubular ceramic support. The mixture of gases may be supplied by an industrial process such as the mixture of exhaust gases from the IGCC process.

Collins, John P. (Boulder, CO); Way, J. Douglas (Boulder, CO)

1995-09-19T23:59:59.000Z

75

Hydrogen-selective membrane  

DOE Patents (OSTI)

A hydrogen-selective membrane comprises a tubular porous ceramic support having a palladium metal layer deposited on an inside surface of the ceramic support. The thickness of the palladium layer is greater than about 10 {micro}m but typically less than about 20 {micro}m. The hydrogen permeation rate of the membrane is greater than about 1.0 moles/m{sup 2} s at a temperature of greater than about 500 C and a transmembrane pressure difference of about 1,500 kPa. Moreover, the hydrogen-to-nitrogen selectivity is greater than about 600 at a temperature of greater than about 500 C and a transmembrane pressure of about 700 kPa. Hydrogen can be separated from a mixture of gases using the membrane. The method may include the step of heating the mixture of gases to a temperature of greater than about 400 C and less than about 1000 C before the step of flowing the mixture of gases past the membrane. The mixture of gases may include ammonia. The ammonia typically is decomposed to provide nitrogen and hydrogen using a catalyst such as nickel. The catalyst may be placed inside the tubular ceramic support. The mixture of gases may be supplied by an industrial process such as the mixture of exhaust gases from the IGCC process. 9 figs.

Collins, J.P.; Way, J.D.

1997-07-29T23:59:59.000Z

76

Hydrogen-selective membrane  

DOE Patents (OSTI)

A hydrogen-selective membrane comprises a tubular porous ceramic support having a palladium metal layer deposited on an inside surface of the ceramic support. The thickness of the palladium layer is greater than about 10 {micro}m but typically less than about 20 {micro}m. The hydrogen permeation rate of the membrane is greater than about 1.0 moles/m{sup 2}s at a temperature of greater than about 500 C and a transmembrane pressure difference of about 1,500 kPa. Moreover, the hydrogen-to-nitrogen selectivity is greater than about 600 at a temperature of greater than about 500 C and a transmembrane pressure of about 700 kPa. Hydrogen can be separated from a mixture of gases using the membrane. The method may include the step of heating the mixture of gases to a temperature of greater than about 400 C and less than about 1000 C before the step of flowing the mixture of gases past the membrane. The mixture of gases may include ammonia. The ammonia typically is decomposed to provide nitrogen and hydrogen using a catalyst such as nickel. The catalyst may be placed inside the tubular ceramic support. The mixture of gases may be supplied by an industrial process such as the mixture of exhaust gases from the IGCC process. 9 figs.

Collins, J.P.; Way, J.D.

1995-09-19T23:59:59.000Z

77

Membrane Scientist Los Angeles, CA  

E-Print Network (OSTI)

and working hands on to ensure quality and commercial viability of reverse osmosis products including hand cast and commercial reverse osmosis membrane testing and synthesis, prototype membrane testing and new

Alpay, S. Pamir

78

OXYGEN TRANSPORT CERAMIC MEMBRANES  

SciTech Connect

Conversion of natural gas to liquid fuels and chemicals is a major goal for the Nation as it enters the 21st Century. Technically robust and economically viable processes are needed to capture the value of the vast reserves of natural gas on Alaska's North Slope, and wean the Nation from dependence on foreign petroleum sources. Technologies that are emerging to fulfill this need are all based syngas as an intermediate. Syngas (a mixture of hydrogen and carbon monoxide) is a fundamental building block from which chemicals and fuels can be derived. Lower cost syngas translates directly into more cost-competitive fuels and chemicals. The currently practiced commercial technology for making syngas is either steam methane reforming (SMR) or a two-step process involving cryogenic oxygen separation followed by natural gas partial oxidation (POX). These high-energy, capital-intensive processes do not always produce syngas at a cost that makes its derivatives competitive with current petroleum-based fuels and chemicals. This project has the following 6 main tasks: Task 1--Design, fabricate and evaluate ceramic to metal seals based on graded ceramic powder/metal braze joints. Task 2--Evaluate the effect of defect configuration on ceramic membrane conductivity and long term chemical and structural stability. Task 3--Determine materials mechanical properties under conditions of high temperatures and reactive atmospheres. Task 4--Evaluate phase stability and thermal expansion of candidate perovskite membranes and develop techniques to support these materials on porous metal structures. Task 5--Assess the microstructure of membrane materials to evaluate the effects of vacancy-impurity association, defect clusters, and vacancy-dopant association on the membrane performance and stability. Task 6--Measure kinetics of oxygen uptake and transport in ceramic membrane materials under commercially relevant conditions using isotope labeling techniques.

Dr. Sukumar Bandopadhyay; Dr. Nagendra Nagabhushana

2001-12-01T23:59:59.000Z

79

Automotive Perspective on Membrane Evaluation  

Energy.gov (U.S. Department of Energy (DOE))

Presentation at the 2008 High Temperature Membrane Working Group Meeting held June 9, 2008, in Washington, DC

80

CX-012025: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Categorical Exclusion Determination Recovery Act: Slipstream Testing of a Membrane Carbon Dioxide Capture Process for Existing Coal-Fired Power Plants CX(s) Applied: A1, A9,...

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

CX-012024: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Categorical Exclusion Determination Recovery Act: Slipstream Testing of a Membrane Carbon Dioxide Capture Process for Existing Coal-Fired Power Plants CX(s) Applied: A1, A9,...

82

CX-003463: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

63: Categorical Exclusion Determination CX-003463: Categorical Exclusion Determination Carbon Dioxide Capture by Sub-Ambient Membrane Operation CX(s) Applied: A9, B3.6 Date: 0823...

83

CX-011105: Categorical Exclusion Determination  

Energy.gov (U.S. Department of Energy (DOE))

Advanced Hybrid Membranes for Next Generation PEMFC Automotive Applications CX(s) Applied: B3.6 Date: 08/26/2013 Location(s): Colorado, Michigan, Minnesota Offices(s): Golden Field Office

84

CX-004063: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Reinvestment Act: Pilot Testing of a Membrane System for Post-Combustion Carbon Dioxide (CO2) Capture CX(s) Applied: A1, A9, A11, B3.6 Date: 10012010 Location(s): Wilsonville,...

85

CX-004064: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Reinvestment Act: Pilot Testing of a Membrane System for Post-Combustion Carbon Dioxide (CO2) Capture CX(s) Applied: A1, A9, A11, B3.6 Date: 10012010 Location(s): Holbrook,...

86

CX-011461: Categorical Exclusion Determination | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Super-Hydrophobic Membrane Contactor Process for Post-Combustion Carbon Dioxide (CO2)... CX(s) Applied: A1, A9, B3.6 Date: 11042013 Location(s): Alabama, Massachusetts,...

87

CX-010198: Categorical Exclusion Determination  

Energy.gov (U.S. Department of Energy (DOE))

Advanced Hydrogen Transport Membranes for Coal Gasification CX(s) Applied: B3.6 Date: 04/04/2013 Location(s): Colorado Offices(s): National Energy Technology Laboratory

88

CX-010199: Categorical Exclusion Determination  

Energy.gov (U.S. Department of Energy (DOE))

Advanced Hydrogen Transport Membranes for Coal Gasification CX(s) Applied: B3.6 Date: 04/04/2013 Location(s): New York Offices(s): National Energy Technology Laboratory

89

CX-010200: Categorical Exclusion Determination  

Energy.gov (U.S. Department of Energy (DOE))

Advanced Hydrogen Transport Membranes for Coal Gasification CX(s) Applied: B3.6 Date: 04/04/2013 Location(s): North Dakota Offices(s): National Energy Technology Laboratory

90

CX-012185: Categorical Exclusion Determination  

Energy.gov (U.S. Department of Energy (DOE))

Novel Ceramic Membranes for the Efficient Utilization of Natural Gas CX(s) Applied: B3.6 Date: 04/02/2014 Location(s): South Carolina Offices(s): Savannah River Operations Office

91

CX-012018: Categorical Exclusion Determination  

Energy.gov (U.S. Department of Energy (DOE))

A Portable, Two-Stage, Antifouling Hollow Fiber Membrane Nanofiltration Process CX(s) Applied: A9, A11, B3.6 Date: 04/28/2014 Location(s): New Mexico Offices(s): National Energy Technology Laboratory

92

CX-012019: Categorical Exclusion Determination  

Energy.gov (U.S. Department of Energy (DOE))

A Portable, Two-Stage, Antifouling Hollow Fiber Membrane Nanofiltration Process CX(s) Applied: A9, A11, B3.6 Date: 04/28/2014 Location(s): New Mexico Offices(s): National Energy Technology Laboratory

93

Robust Polymer Composite Membranes for Hydrogen Separation |...  

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

Robust Polymer Composite Membranes for Hydrogen Separation Robust Polymer Composite Membranes for Hydrogen Separation polymercompositemembranes.pdf More Documents & Publications...

94

Oxygen Transport Ceramic Membranes  

SciTech Connect

The present quarterly report describes some of the investigations on the structural properties of dense OTM bars provided by Praxair and studies on newer composition of Ti doped LSF. Thermogravimetric analysis (TGA) was carried out on La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-{delta}} to investigate oxygen deficiency ({delta}) of the sample. The TGA was performed in a controlled atmosphere using oxygen, argon, carbon monoxide and carbon dioxide with adjustable gas flow rates. In this experiment, the weight loss and gain of La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-{delta}} was directly measured by TGA. The weight change of the sample was evaluated at between 600 and 1250 C in air or 1000 C as a function of oxygen partial pressure. The oxygen deficiencies calculated from TGA data as a function of oxygen activity and temperature will be estimated and compared with that from neutron diffraction measurement in air. The LSFT and LSFT/CGO membranes were fabricated from the powder obtained from Praxair Specialty Ceramics. The sintered membranes were subjected to microstructure analysis and hardness analysis. The LSFT membrane is composed of fine grains with two kinds of grain morphology. The grain size distribution was characterized using image analysis. In LSFT/CGO membrane a lot of grain pullout was observed from the less dense, porous phase. The hardness of the LSFT and dual phase membranes were studied at various loads. The hardness values obtained from the cross section of the membranes were also compared to that of the values obtained from the surface. An electrochemical cell has been designed and built for measurements of the Seebeck coefficient as a function of temperature and pressure. Measurements on La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-{delta}} as a function of temperature an oxygen partial pressure are reported. Further analysis of the dilatometry data obtained previously is presented. A series of isotope transients under air separation mode (small gradient) were completed on the membrane of LSCrF-2828 at 900 C. Low pO{sub 2} atmospheres based on with CO-CO{sub 2} mixtures have also been admitted to the delivery side of the LSCrF-2828 membrane to produce the gradients which exist under syngas generation conditions. The CO-CO{sub 2} mixtures have normal isotopic {sup 18}O abundances. The evolution of {sup 18}O on the delivery side in these experiments after an {sup 18}O pulse on the air side reveals a wealth of information about the oxygen transport processes.

S. Bandopadhyay; N. Nagabhushana; T. Nithyanantham; X.-D Zhou; Y-W. Sin; H.U. Anderson; Alan Jacobson; C.A. Mims

2005-02-01T23:59:59.000Z

95

OXYGEN TRANSPORT CERAMIC MEMBRANES  

SciTech Connect

In the present quarter, experiments are presented on ceramic/metal interactions of Zirconia/Ni-B-Si system and with a thin Ti coating deposited on zirconia surface. Processing of perovskites of LSC, LSF and LSCF composition for evaluation of mechanical properties as a function of environment are begun. The studies are to be in parallel with LSFCO composition to characterize the segregation of cations and slow crack growth in environmental conditions. La{sub 1-x}Sr{sub x}FeO{sub 3-d} has also been characterized for paramagnetic ordering at room temperature and the evolution of magnetic moments as a function of temperature are investigated. Investigation on the thermodynamic properties of the membrane materials are continued to develop a complete model for the membrane transport.

Dr. Sukumar Bandopadhyay; Dr. Nagendra Nagabhushana

2003-01-01T23:59:59.000Z

96

Solid-state membrane module  

DOE Patents (OSTI)

Solid-state membrane modules comprising at least one membrane unit, where the membrane unit has a dense mixed conducting oxide layer, and at least one conduit or manifold wherein the conduit or manifold comprises a dense layer and at least one of a porous layer and a slotted layer contiguous with the dense layer. The solid-state membrane modules may be used to carry out a variety of processes including the separating of any ionizable component from a feedstream wherein such ionizable component is capable of being transported through a dense mixed conducting oxide layer of the membrane units making up the membrane modules. For ease of construction, the membrane units may be planar.

Gordon, John Howard (Salt Lake City, UT); Taylor, Dale M. (Murray, UT)

2011-06-07T23:59:59.000Z

97

OXYGEN TRANSPORT CERAMIC MEMBRANES  

SciTech Connect

This is the fourth quarterly report on a new study to develop a ceramic membrane/metal joint. The first experiments using the La-Sr-Fe-O ceramic are reported. Some of the analysis performed on the samples obtained are commented upon. A set of experiments to characterize the mechanical strength and thermal fatigue properties of the joints has been designed and begun. Finite element models of joints used to model residual stresses are described.

Dr. Sukumar Bandopadhyay; Dr. Nagendra Nagabhushana

2000-07-01T23:59:59.000Z

98

Novel Catalytic Membrane Reactors  

SciTech Connect

There are many industrial catalytic organic reversible reactions with amines or alcohols that have water as one of the products. Many of these reactions are homogeneously catalyzed. In all cases removal of water facilitates the reaction and produces more of the desired chemical product. By shifting the reaction to right we produce more chemical product with little or no additional capital investment. Many of these reactions can also relate to bioprocesses. Given the large number of water-organic compound separations achievable and the ability of the Compact Membrane Systems, Inc. (CMS) perfluoro membranes to withstand these harsh operating conditions, this is an ideal demonstration system for the water-of-reaction removal using a membrane reactor. Enhanced reaction synthesis is consistent with the DOE objective to lower the energy intensity of U.S. industry 25% by 2017 in accord with the Energy Policy Act of 2005 and to improve the United States manufacturing competitiveness. The objective of this program is to develop the platform technology for enhancing homogeneous catalytic chemical syntheses.

Stuart Nemser, PhD

2010-10-01T23:59:59.000Z

99

Ensure the best performance from membranes and demineralizers  

SciTech Connect

This article discusses how the use of various membrane technologies to provide high-purity water for power generation has increased dramatically in the last 10 years. This trend has been driven primarily by three factors: (1) reduction in costs achieved through reduced chemical, operation, and maintenance requirements; (2) reduction of waste-treatment requirements in response to new environmental legislation; and (3) reduction of man-power requirements for monitoring regeneration of ion-exchange (IX) regenerations. The economic impact of membrane technology applied ahead of a makeup water demineralizer can be illustrated by a series of examples with three different waters, each used at three different flow rates. A cost analysis is provided for each case, before and after backfitting a membrane system. For perspective, the leading membrane technologies are reviewed first.

Strauss, S.D.

1993-03-01T23:59:59.000Z

100

A deformable elastic membrane embedded in a lattice Boltzmann fluid  

E-Print Network (OSTI)

A method is described for embedding a deformable, elastic, membrane within a lattice Boltzmann fluid. The membrane is represented by a set of massless points which advect with the fluid and which impose forces on the fluid which are derived from a free energy functional with a value which is dependent upon the geometric properties of the membrane. The method is validated in two dimensions with a free energy functional which imposes the constraint of constant membrane length, constant enclosed area, a bending rigidity and a preferred curvature. The method is shown to recover the expected equilibrium shape in the absence of flow and deformation in the presence of an applied shear flow. The method may have applications in a number of mesoscopic simulations, including discrete models of blood cells.

S V Lishchuk; C M Care

2006-07-14T23:59:59.000Z

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101

POSITION OPENING APPLIED STATISTICS  

E-Print Network (OSTI)

: Assistant or Associate Professor of Applied Statistics. Employment Beginning: September 16, 2012 DescriptionPOSITION OPENING APPLIED STATISTICS Department of Decision Sciences Charles H. Lundquist College at the University of Oregon is seeking to fill one tenure-track faculty position in Applied Statistics. Rank

Shepp, Larry

102

Membranes, methods of making membranes, and methods of separating gases using membranes  

DOE Patents (OSTI)

Membranes, methods of making membranes, and methods of separating gases using membranes are provided. The membranes can include at least one hydrophilic polymer, at least one cross-linking agent, at least one base, and at least one amino compound. The methods of separating gases using membranes can include contacting a gas stream containing at least one of CO.sub.2, H.sub.2S, and HCl with one side of a nonporous and at least one of CO.sub.2, H.sub.2S, and HCl selectively permeable membrane such that at least one of CO.sub.2, H.sub.2S, and HCl is selectively transported through the membrane.

Ho, W. S. Winston

2012-10-02T23:59:59.000Z

103

Applied quantum mechanics 1 Applied Quantum Mechanics  

E-Print Network (OSTI)

that describe the time-dependent state . If can be expressed as a power series in the perturbing potential of a one dimensional har- monic oscillator. At time t = 0 a perturbation is applied where V0-dimensional rectangular potential well for which in the range and elsewhere. It is decided to control the state

Levi, Anthony F. J.

104

Oxygen Transport Ceramic Membranes  

SciTech Connect

The present quarterly report describes some of the investigations on the structural properties of dense OTM bars provided by Praxair and studies on newer composition of Ti doped LSF. In the previous research, the reference point of oxygen occupancy was determined and verified. In the current research, the oxygen occupancy was investigated at 1200 C as a function of oxygen activity and compared with that at 1000 C. The cause of bumps at about 200 C was also investigated by using different heating and cooling rates during TGA. The fracture toughness of LSFT and dual phase membranes at room temperature is an important mechanical property. Vicker's indentation method was used to evaluate this toughness. Through this technique, a K{sub Ic} (Mode-I Fracture Toughness) value is attained by means of semi-empirical correlations between the indentation load and the length of the cracks emanating from the corresponding Vickers indentation impression. In the present investigation, crack propagation behavior was extensively analyzed in order to understand the strengthening mechanisms involved in the non-transforming La based ceramic composites. Cracks were generated using Vicker's indenter and used to identify and evaluate the toughening mechanisms involved. Preliminary results of an electron microscopy study of the origin of the slow kinetics on reduction of ferrites have been obtained. The slow kinetics appear to be related to a non-equilibrium reduction pathway that initially results in the formation of iron particles. At long times, equilibrium can be reestablished with recovery of the perovskite phase. Modeling of the isotopic transients on operating membranes (LSCrF-2828 at 900 C) and a ''frozen'' isotope profile have been analyzed in conjunction with a 1-D model to reveal the gradient in oxygen diffusivity through the membrane under conditions of high chemical gradients.

S. Bandopadhyay; T. Nithyanantham; X.-D Zhou; Y-W. Sin; H.U. Anderson; Alan Jacobson; C.A. Mims

2005-08-01T23:59:59.000Z

105

Oxygen Transport Ceramic Membranes  

SciTech Connect

The present quarterly report describes some of the investigations on the structural properties of dense OTM bars provided by Praxair and studies on newer composition of Ti doped LSF. The in situ electrical conductivity and Seebeck coefficient measurements were made on LSFT at 1000 and 1200 C over the oxygen activity range from air to 10{sup -15} atm. The electrical conductivity measurements exhibited a p to n type transition at an oxygen activity of 1 x 10{sup -10} at 1000 C and 1 x 10{sup -6} at 1200 C. Thermogravimetric studies were also carried out over the same oxygen activities and temperatures. Based on the results of these measurements, the chemical and mechanical stability range of LSFT were determined and defect structure was established. The studies on the fracture toughness of the LSFT and dual phase membranes exposed to air and N{sub 2} at 1000 C was done and the XRD and SEM analysis of the specimens were carried out to understand the structural and microstructural changes. The membranes that are exposed to high temperatures at an inert and a reactive atmosphere undergo many structural and chemical changes which affect the mechanical properties. A complete transformation of fracture behavior was observed in the N{sub 2} treated LSFT samples. Further results to investigate the origin of the slow kinetics on reduction of ferrites have been obtained. The slow kinetics appear to be related to a non-equilibrium reduction pathway that initially results in the formation of iron particles. At long times, equilibrium can be reestablished with recovery of the perovskite phase. Recent results on transient kinetic data are presented. The 2-D modeling of oxygen movement has been undertaken in order to fit isotope data. The model is used to study ''frozen'' profiles in patterned or composite membranes.

S. Bandopadhyay; T. Nithyanantham; X.-D Zhou; Y-W. Sin; H.U. Anderson; Alan Jacobson; C.A. Mims

2005-02-01T23:59:59.000Z

106

Current status and development of membranes for CO2/CH4 separation: A review  

Science Journals Connector (OSTI)

Carbon dioxide (CO2) is a greenhouse gas found primarily as a main combustion product of fossil fuel as well as a component in natural gas, biogas and landfill gas. The interest to remove CO2 from those gas streams to obtain fuel with enhanced energy content and prevent corrosion problems in the gas transportation system, in addition to CO2 implications to the climate change, has driven the development of CO2 separation process technology. One type of technology which has experienced substantial growth, breakthroughs and advances during past decades is membrane-based technology. The attractive features offered by this technology include high energy efficiency, simplicity in design and construction of membrane modules and environmental compatibility. The objective of this review is to overview the different types of membranes available for use including their working principles, current status and development which form the primary determinants of separation performance and efficiency. The emphasis is toward CO2/CH4 separation, considering its substantial and direct relevance to the gas industry. To this end, discussion is made to cover polymeric gas permeation membranes; CO2-selective facilitated transport membranes, hollow fiber gas–liquid membrane contactors, inorganic membranes and mixed matrix membranes. The market for CO2 separation is currently dominated by polymeric membranes due to their relatively low manufacturing cost and processing ability into flat sheet and hollow fiber configurations as well as well-documented research studies. While there have been immensely successful membrane preparation and development techniques with consequential remarkable performance for each type of membrane. Each type of membrane brings associated advantages and drawbacks related to the characteristic transport mechanism for specific application conditions. Inorganic membranes, for example, are very suitable for high temperature CO2 separation in excess of 400 °C while all other membranes can be applied at lower temperatures. The recent emergence of mixed matrix membranes has allowed the innovative approach to combine the advantages offered by inorganic and polymeric materials.

Yuan Zhang; Jaka Sunarso; Shaomin Liu; Rong Wang

2013-01-01T23:59:59.000Z

107

Oxygen Transport Ceramic Membranes  

SciTech Connect

The present quarterly report describes some of the initial studies on newer compositions and also includes newer approaches to address various materials issues such as in metal-ceramic sealing. The current quarter's research has also focused on developing a comprehensive reliability model for predicting the structural behavior of the membranes in realistic conditions. In parallel to industry provided compositions, models membranes have been evaluated in varying environment. Of importance is the behavior of flaws and generation of new flaws aiding in fracture. Fracture mechanics parameters such as crack tip stresses are generated to characterize the influence of environment. Room temperature slow crack growth studies have also been initiated in industry provided compositions. The electrical conductivity and defect chemistry of an A site deficient compound (La{sub 0.55}Sr{sub 0.35}FeO{sub 3}) was studied. A higher conductivity was observed for La{sub 0.55}Sr{sub 0.35}FeO{sub 3} than that of La{sub 0.60}Sr{sub 0.40}FeO{sub 3} and La{sub 0.80}Sr{sub 0.20}FeO{sub 3}. Defect chemistry analysis showed that it was primarily contributed by a higher carrier concentration in La{sub 0.55}Sr{sub 0.35}FeO{sub 3}. Moreover, the ability for oxygen vacancy generation is much higher in La{sub 0.55}Sr{sub 0.35}FeO{sub 3} as well, which indicates a lower bonding strength between Fe-O and a possible higher catalytic activity for La{sub 0.55}Sr{sub 0.35}FeO{sub 3}. The program continued to investigate the thermodynamic properties (stability and phase separation behavior) and total conductivity of prototype membrane materials. The data are needed together with the kinetic information to develop a complete model for the membrane transport. Previous report listed initial measurements on a sample of La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-x} prepared in-house by Praxair. Subsequently, a second sample of powder from a larger batch of sample were characterized and compared with the results from the previous batch.

S. Bandopadhyay; N. Nagabhushana; Thomas W. Eagar; Harold R. Larson; Raymundo Arroyave; X.-D Zhou; Y.-W. Shin; H.U. Anderson; Nigel Browning; Alan Jacobson; C.A. Mims

2003-11-01T23:59:59.000Z

108

Gas Separation Using Membranes  

E-Print Network (OSTI)

.133.132, May 12. 1964. 45. Kesting, R. E., Synthetic Polymeric Membranes. McGraw-Hill, N. Y. (1971). 46. Strathmann, H., Kock. K., Amar. P., and Baker, R. W., Desalination 16, 179 (1975). 47. Strathmann, H., Schel""ble, P?? and Baker. R. W?? J. Appl...?? Desalination 21. 241 (1977). 51. Cohen. C?? Tanny, G. B?? and Prager, S., J. Polym. Sci.. Polym. Phys. Ed. 17, 477 (1979). 52. Tanny, G. B., J. App], Polym. ~i. 1!. 2149 (1974). 53. Cabasso, I?? Klein, E?? and smith. J. K., "Research and Development...

Koros, W. J.; Paul, D. R.

1984-01-01T23:59:59.000Z

109

Analytical Chemistry Applied Mathematics  

E-Print Network (OSTI)

Analytical Chemistry Applied Mathematics Architectural Engineering Architecture Architecture Electricity Markets Environmental Engineering Food Process Engineering Food Safety & Technology Architecture Information Technology & Management Integrated Building Delivery Landscape Architecture Management

Heller, Barbara

110

How To Apply  

NLE Websites -- All DOE Office Websites (Extended Search)

CSCEEE undergraduate students are encouraged to apply. Required Materials Current Resume Official University Transcript (with spring courses posted andor a copy of Spring...

111

A Novel Anaerobic Electrochemical Membrane Bioreactor (AnEMBR) with Conductive Hollow-fiber Membrane for Treatment of Low-  

E-Print Network (OSTI)

-6 By excluding oxygen from the system and applying an additional voltage to the circuit, hydrogen is evolved and Engineering Division, Water Desalination and Reuse Center, Thuwal 23955-6900, Saudi Arabia King Abdullah University of Science and Technology, Advanced Membranes and Porous Materials Research Center, Thuwal 23955

112

Oxygen Transport Ceramic Membranes  

SciTech Connect

The present quarterly report describes some of the investigations on the structural properties of dense OTM bars provided by Praxair and studies on newer composition of Ti doped Ti-substituted perovskites, La{sub 0.7}Sr{sub 0.3}Mn{sub 1-x}Ti{sub x}O{sub 3}, with 0 {le} x {le} 0.20, were investigated by neutron diffraction, magnetization, electric resistivity, and magnetoresistance (MR) measurements. All samples show a rhombohedral structure (space group R3C) from 10 K to room temperature. At room temperature, the cell parameters a, c and the unit cell volume increase with increasing Ti content. However, at 10 K, the cell parameter a has a maximum value for x = 0.10, and decreases for x > 0.10, while the unit cell volume remains nearly constant for x > 0.10. The average (Mn,Ti)-O bond length increases up to x = 0.15, and the (Mn,Ti)-O-(Mn,Ti) bond angle decreases with increasing Ti content to its minimum value at x = 0.15 at room temperature. Below the Curie temperature TC, the resistance exhibits metallic behavior for the x {le} 0.05 samples. A metal (semiconductor) to insulator transition is observed for the x {ge} 0.10 samples. A peak in resistivity appears below TC for all samples, and shifts to a lower temperature as x increases. The substitution of Mn by Ti decreases the 2p-3d hybridization between O and Mn ions, reduces the bandwidth W, and increases the electron-phonon coupling. Therefore, the TC shifts to a lower temperature and the resistivity increases with increasing Ti content. A field-induced shift of the resistivity maximum occurs at x {le} 0.10 compounds. The maximum MR effect is about 70% for La{sub 0.7}Sr{sub 0.3}Mn{sub 0.8}Ti{sub 0.2}O{sub 3}. The separation of TC and the resistivity maximum temperature T{sub {rho},max} enhances the MR effect in these compounds due to the weak coupling between the magnetic ordering and the resistivity as compared with La{sub 0.7}Sr{sub 0.3}MnO{sub 3}. The bulk densities of the membranes were determined using the Archimedes method. The bulk density was 5.029 and 5.57 g/cc for LSFT and dual phase membranes, respectively. The microstructure of the dual phase membrane was analyzed using SEM. It is evident from the micrograph that the microstructure is composed of dual phases. The dense circular regions are enclosed by the less dense, continuous phase which accommodates most of the pores. The pores are normally aggregated and found clustered along the dense regions where as the dense regions do not have pores. Upon closer observation of the micrograph it is revealed that the dense region has a clear circular cleavage or crack as their boundary. The circular cleavage clearly encompasses a dense region and which consists of no pore or any flaw that is visible. The size distribution of the dense, discontinuous regions is varying from 5 to 20 {micro}m with a D{sub 50} of 15 {micro}m. The grain size distribution was estimated from the micrographs using image analysis and a unimodal distribution of grains was observed with an average grain size of 1.99 {micro}m. The chemical compositions of the membranes were analyzed using EDS analysis and no other impurities were observed. The XRD analysis was carried out for the membranes and the phase purity was confirmed. The fracture toughness of LSFT membranes at room temperature has to be calculated using the Vickers indentation method. An electrochemical cell has been designed and built for measurements of the ionic conductivity by the use of blocking electrodes. Preliminary measurements on La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-{delta}} are reported. Modifications to the apparatus to improve the data quality have been completed. Electron microscopy studies of the origin of the slow kinetics on reduction of ferrites have been initiated. A series of isotope transients under air separation mode (small gradient) were completed on the membrane of LSCrF-2828 at 900 C. Low pO{sub 2} atmospheres based on with CO-CO{sub 2} mixtures have also been admitted to the delivery side of the LSCrF-2828 membrane to produce the gradient

S. Bandopadhyay; T. Nithyanantham; X.-D Zhou; Y-W. Sin; H.U. Anderson; Alan Jacobson; C.A. Mims

2005-05-01T23:59:59.000Z

113

Operation of staged membrane oxidation reactor systems  

SciTech Connect

A method of operating a multi-stage ion transport membrane oxidation system. The method comprises providing a multi-stage ion transport membrane oxidation system with at least a first membrane oxidation stage and a second membrane oxidation stage, operating the ion transport membrane oxidation system at operating conditions including a characteristic temperature of the first membrane oxidation stage and a characteristic temperature of the second membrane oxidation stage; and controlling the production capacity and/or the product quality by changing the characteristic temperature of the first membrane oxidation stage and/or changing the characteristic temperature of the second membrane oxidation stage.

Repasky, John Michael

2012-10-16T23:59:59.000Z

114

Oxygen Transport Membranes  

SciTech Connect

The focus of this research was to develop new membrane materials by synthesizing different compounds and determining their defect structures, crystallographic structures and electrical properties. In addition to measuring electrical conductivity, oxygen vacancy concentration was also evaluated using thermogravimetry, Neutron diffraction and Moessbauer Spectroscopy. The reducing conditions (CO{sub 2}/CO/H{sub 2} gas mixtures with steam) as encountered in a reactor environment can be expected to have significant influence on the mechanical properties of the oxides membranes. Various La based materials with and without Ti were selected as candidate membrane materials for OTM. The maximum electrical conductivity of LSF in air as a function of temperature was achieved at < 600 C and depends on the concentration of Sr (acceptor dopant). Oxygen occupancy in LSF was estimated using Neutron diffractometry and Moessbauer Spectroscopy by measuring magnetic moment changes depending on the Fe{sup 3+} and Fe{sup 4+} ratio. After extensive studies of candidate materials, lanthanum ferrites (LSF and LSFT) were selected as the favored materials for the oxygen transport membrane (OTM). LSF is a very good material for an OTM because of its high electronic and oxygen ionic conductivity if long term stability and mechanical strength are improved. LSFT not only exhibits p-type behavior in the high oxygen activity regime, but also has n-type conduction in reducing atmospheres. Higher concentrations of oxygen vacancies in the low oxygen activity regime may improve the performance of LSFT as an OTM. The hole concentration is related to the difference in the acceptor and donor concentration by the relation p = [Sr'{sub La}]-[Ti{sm_bullet}{sub Fe}]. The chemical formulation predicts that the hole concentration is, p = 0.8-0.45 or 0.35. Experimental measurements indicated that p is about {approx} 0.35. The activation energy of conduction is 0.2 eV which implies that LSCF conducts via the small polaron conduction mechanism. Scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS) were used to develop strategies to detect and characterize vacancy creation, dopant segregations and defect association in the oxygen conducting membrane material. The pO{sub 2} and temperature dependence of the conductivity, non-stoichiometry and thermal-expansion behavior of compositions with increasing complexity of substitution on the perovskite A and B sites were studied. Studies with the perovskite structure show anomalous behavior at low oxygen partial pressures (<10{sup -5} atm). The anomalies are due to non-equilibrium effects and can be avoided by using very strict criteria for the attainment of equilibrium. The slowness of the oxygen equilibration kinetics arises from two different mechanisms. In the first, a two phase region occurs between an oxygen vacancy ordered phase such as brownmillerite SrFeO{sub 2.5} and perovskite SrFeO{sub 3-x}. The slow kinetics is associated with crossing the two phase region. The width of the miscibility gap decreases with increasing temperature and consequently the effect is less pronounced at higher temperature. The preferred kinetic pathway to reduction of perovskite ferrites when the vacancy concentration corresponds to the formation of significant concentrations of Fe{sup 2+} is via the formation of a Ruddlesden-Popper (RP) phases as clearly observed in the case of La{sub 0.5}Sr{sub 0.5}FeO{sub 3-x} where LaSrFeO{sub 4} is found together with Fe. In more complex compositions, such as LSFTO, iron or iron rich phases are observed locally with no evidence for the presence of discrete RP phase. Fracture strength of tubular perovskite membranes was determined in air and in reducing atmospheric conditions. The strength of the membrane decreased with temperature and severity of reducing conditions although the strength distribution (Weibull parameter, m) was relatively unaltered. Surface and volume dominated the fracture origins and the overall fracture was purely transgranular. The dual phas

S. Bandopadhyay

2008-08-30T23:59:59.000Z

115

Applied Energy Programs  

NLE Websites -- All DOE Office Websites (Extended Search)

Applied Energy Programs Applied Energy Programs Applied Energy Programs Los Alamos is using its world-class scientific capabilities to enhance national energy security by developing energy sources with limited environmental impact and by improving the efficiency and reliability of the energy infrastructure. CONTACT US Acting Program Director Melissa Fox (505) 663-5538 Email Applied Energy Program Office serves as the hub connecting the Laboratory's scientific and technical resources to DOE sponsors, DoD programs, and to industry. The Applied Energy Program Office manages Los Alamos National Laboratory programs funded by the Department of Energy's (DOE's) Offices of Energy Efficiency/Renewable Energy, Electricity Delivery and Energy Reliability, and Fossil Energy. With energy use increasing across the nation and the

116

Oxygen Transport Ceramic Membranes  

SciTech Connect

Ti doping on La{sub 1-x}Sr{sub x}FeO{sub 3-{delta}} (LSF) tends to increase the oxygen equilibration kinetics of LSF in lower oxygen activity environment because of the high valence state of Ti. However, the addition of Ti decreases the total conductivity because the acceptor ([Sr{prime}{sub La}]) is compensated by the donor ([Ti{sub Fe}{sup {sm_bullet}}]) which decreases the carrier concentration. The properties of La{sub 0.2}Sr{sub 0.8}Fe{sub 1-x}Ti{sub x}O{sub 3-{delta}} (LSFT, x = 0.45) have been experimentally and theoretically investigated to elucidate (1) the dependence of oxygen occupancy and electrochemical properties on temperature and oxygen activity by thermogravimetric analysis (TGA) and (2) the electrical conductivity and carrier concentration by Seebeck coefficient and electrical measurements. In the present study, dual phase (La{sub 0.2}Sr{sub 0.8}Fe{sub 0.6}Ti{sub 0.4}O{sub 3-{delta}}/Ce{sub 0.9}Gd{sub 0.1}O{sub 2-{delta}}) membranes have been evaluated for structural properties such as hardness, fracture toughness and flexural strength. The effect of high temperature and slightly reducing atmosphere on the structural properties of the membranes was studied. The flexural strength of the membrane decreases upon exposure to slightly reducing conditions at 1000 C. The as-received and post-fractured membranes were characterized using XRD, SEM and TG-DTA to understand the fracture mechanisms. Changes in structural properties of the composite were sought to be correlated with the physiochemical features of the two-phases. We have reviewed the electrical conductivity data and stoichiometry data for La{sub 0.2}Sr{sub 0.8}Cr{sub 0.2}Fe{sub 0.8}O{sub 3-{delta}} some of which was reported previously. Electrical conductivity data for La{sub 0.2}Sr{sub 0.8}Cr{sub 0.2}Fe{sub 0.8}O{sub 3-{delta}} (LSCrF) were obtained in the temperature range, 752 {approx} 1055 C and in the pO{sub 2} range, 10{sup -18} {approx} 0.5 atm. The slope of the plot of log {sigma} vs. log pO{sub 2} is {approx} 1/5 in the p-type region, pO{sub 2} = 10{sup -5} {approx} 10{sup -1} atm. The pO{sub 2} at which the p-n transition is observed increases with increasing temperature. The activation energy for ionic conduction was estimated to be 0.86 eV from an Arrhenius plot of the minimum conductivity vs. reciprocal temperature. At temperatures below 940 C, a plateau in the conductivity isotherm suggests the presence of a two-phase region. Most likely, phase separation occurs to form a mixture of a perovskite phase and an oxygen vacancy ordered phase related to brownmillerite. Additional data for the oxygen non stoichiometry are presented.

S. Bandopadhyay; T. Nithyanantham

2006-12-31T23:59:59.000Z

117

Staged membrane oxidation reactor system  

DOE Patents (OSTI)

Ion transport membrane oxidation system comprising (a) two or more membrane oxidation stages, each stage comprising a reactant zone, an oxidant zone, one or more ion transport membranes separating the reactant zone from the oxidant zone, a reactant gas inlet region, a reactant gas outlet region, an oxidant gas inlet region, and an oxidant gas outlet region; (b) an interstage reactant gas flow path disposed between each pair of membrane oxidation stages and adapted to place the reactant gas outlet region of a first stage of the pair in flow communication with the reactant gas inlet region of a second stage of the pair; and (c) one or more reactant interstage feed gas lines, each line being in flow communication with any interstage reactant gas flow path or with the reactant zone of any membrane oxidation stage receiving interstage reactant gas.

Repasky, John Michael; Carolan, Michael Francis; Stein, VanEric Edward; Chen, Christopher Ming-Poh

2012-09-11T23:59:59.000Z

118

Staged membrane oxidation reactor system  

DOE Patents (OSTI)

Ion transport membrane oxidation system comprising (a) two or more membrane oxidation stages, each stage comprising a reactant zone, an oxidant zone, one or more ion transport membranes separating the reactant zone from the oxidant zone, a reactant gas inlet region, a reactant gas outlet region, an oxidant gas inlet region, and an oxidant gas outlet region; (b) an interstage reactant gas flow path disposed between each pair of membrane oxidation stages and adapted to place the reactant gas outlet region of a first stage of the pair in flow communication with the reactant gas inlet region of a second stage of the pair; and (c) one or more reactant interstage feed gas lines, each line being in flow communication with any interstage reactant gas flow path or with the reactant zone of any membrane oxidation stage receiving interstage reactant gas.

Repasky, John Michael; Carolan, Michael Francis; Stein, VanEric Edward; Chen, Christopher Ming-Poh

2014-05-20T23:59:59.000Z

119

Staged membrane oxidation reactor system  

DOE Patents (OSTI)

Ion transport membrane oxidation system comprising (a) two or more membrane oxidation stages, each stage comprising a reactant zone, an oxidant zone, one or more ion transport membranes separating the reactant zone from the oxidant zone, a reactant gas inlet region, a reactant gas outlet region, an oxidant gas inlet region, and an oxidant gas outlet region; (b) an interstage reactant gas flow path disposed between each pair of membrane oxidation stages and adapted to place the reactant gas outlet region of a first stage of the pair in flow communication with the reactant gas inlet region of a second stage of the pair; and (c) one or more reactant interstage feed gas lines, each line being in flow communication with any interstage reactant gas flow path or with the reactant zone of any membrane oxidation stage receiving interstage reactant gas.

Repasky, John Michael; Carolan, Michael Francis; Stein, VanEric Edward; Chen, Christopher Ming-Poh

2013-04-16T23:59:59.000Z

120

Oxygen Transport Ceramic Membranes  

SciTech Connect

A non-agglomerated and nanocrystalline-sized powder was successfully produced using ethylene glycol nitrate methods. The LSFT powder prepared using this method exhibits well dispersed and nano-sized particles about 100-200 nm. The density of LSFT sintered at 1300 C was about 90% of the theoretical density at which is 100 C less than that of the previous LSFT which was sintered at 1400 C. The sample sintered at 1400 C exhibited the evidence of a liquid phase at the grain boundaries and 2nd phase formation which probably caused low mechanical stability. The electrical conductivity and Seebeck coefficient were measured as a function of temperature. The LSFT-CGO specimens were cut from the as sintered bars and used for the evaluation of Mechanical Properties after polishing. The effect of strain rate on the flexural strength of the LSFT-CGO test specimens was studied. Three strain rates 6, 60 and 600 {micro}m/ min were chosen for this study. It is observed from the results that with increasing cross head speed the membrane takes higher loads to fail. A reduction in the strength of the membrane was observed at 1000 C in N{sub 2}. Two different routes were investigated to synthesis GDC using either formate or carbonate precursors. The precursor and CGO particle morphologies were examined by scanning electron microscopy. The thermal decomposition behaviors of Ce(Gd)(HCOO){sub 3} and Ce(Gd)(CO{sub 3})(OH) were determined by thermogravimetric analysis (TGA) at a rate of 3 C/min in air. The X-ray powder diffraction patterns of the precursor and CGO were collected and nitrogen adsorption isotherms were measured. Conductivity measurements were made by AC impedance spectroscopy on sintered disks in air using platinum electrodes.

S. Bandopadhyay; T. Nithyanantham

2006-06-30T23:59:59.000Z

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Oxygen Transport Ceramic Membranes  

SciTech Connect

In the present quarter, experiments are presented on ceramic/metal interactions of Zirconia/ Ni-B-Si system and with a thin Ti coating deposited on zirconia surface. Existing facilities were modified for evaluation of environmental assisted slow crack growth and creep in flexural mode. Processing of perovskites of LSC, LSF and LSCF composition were continued for evaluation of mechanical properties as a function of environment. These studies in parallel to those on the LSFCO composition is expect to yield important information on questions such as the role of cation segregation and the stability of the perovskite structure on crack initiation vs. crack growth. Studies have been continued on the La{sub 1-x}Sr{sub x}FeO{sub 3-d} composition using neutron diffraction and TGA studies. A transition from p-type to n-type of conductor was observed at relative low pO{sub 2}, at which the majority carriers changed from the holes to electrons because of the valence state decreases in Fe due to the further loss of oxygen. Investigation on the thermodynamic properties of the membrane materials are continued to develop a complete model for the membrane transport. Data obtained at 850 C show that the stoichiometry in La{sub 0.2}Sr{sub 0.8}Fe{sub 0.8}Cr{sub 0.2}O{sub 3-x} vary from {approx}2.85 to 2.6 over the pressure range studied. From the stoichiometry a lower limit of 2.6 corresponding to the reduction of all Fe{sup 4+} to Fe{sup 3+} and no reduction of Cr{sup 3+} is expected.

S. Bandopadhyay; N. Nagabhushana

2003-08-07T23:59:59.000Z

122

Polyelectrolyte complex/PVA membranes for diffusion dialysis  

Science Journals Connector (OSTI)

Abstract Polyelectrolyte complexes (PECs)/polyvinyl alcohol (PVA) membranes are prepared from PVA, anion exchange and cation exchange multisilicon copolymers, which contain plenty of functional groups of OH, N+(CH3)3/Si(OCH3)3, and SO3Na/Si(OCH3)3, respectively. The OH and Si(OCH3)3 groups can undertake sol–gel reaction to form crosslinking structure, while the N+(CH3)3 and \\{SO3Na\\} groups can be combined through electrostatic interaction. The PECs/PVA membranes exhibit improved thermal stability, swelling resistance and flexibility as compared with single anion or cation exchange hybrid membranes. The PECs/PVA membranes have the water uptakes (WR) of 25.3–70.4%, initial decomposition temperatures (IDTs) of 246–285 °C, tensile strength of 23.1–33.8 MPa, and elongation at break of 3.5–13.1%. The membranes can be potentially applied for both acid and alkali recovery through diffusion dialysis (DD) process. The separation factor (S) for HCl/FeCl2 mixture can reach up to 89.9, which is about five times higher than that of commercial DF-120 membrane (18.5 at 25 °C). The dialysis coefficients of NaOH (UOH) are in the range of 0.014–0.019 m/h, around 7–9 times higher than the value of commercial SPPO membrane (0.002 m/h at 25 °C). The membranes also show potential usefulness for industrial acidic and alkali wastes treatment.

Cong Wang; Cuiming Wu; Yonghui Wu; Jingjing Gu; Tongwen Xu

2013-01-01T23:59:59.000Z

123

AEROSPACE SCIENCES Applied aerodynamics  

E-Print Network (OSTI)

AEROSPACE SCIENCES Applied aerodynamics This year saw significant progress in industry, research labs, and academia in the development of flow-control concepts, novel configuration aerodynamic concepts, and aerodynamic im- provement technologies for enhancing the fuel efficiency and performance

Xu, Kun

124

Applied large eddy simulation  

Science Journals Connector (OSTI)

...2971-2983. doi:10.1098/rsta.2008.0303 . Audio Supplement Audio Supplement Audio files from the Applied large eddy simulation...fidelity. | Whittle Laboratory, Department of Engineering, University of Cambridge, Cambridge CB2 1PZ...

2009-01-01T23:59:59.000Z

125

General Aspects of Membrane Separation Processes  

Science Journals Connector (OSTI)

This chapter focuses on the current challenges of water and wastewater treatment aiming reuse. Membrane separation processes are presented and electrodialysis is compared to pressure driven membrane processes,...

Andréa Moura Bernardes

2014-01-01T23:59:59.000Z

126

Acid Doped Membranes for High Temperature PEMFC  

Energy.gov (U.S. Department of Energy (DOE))

Presentation on Acid Doped Membranes for High Temperature PEMFC to the High Temperature Membrane Working Group, May 25, 2004 in Philadelphia, PA.

127

Theoretical and experimental investigation of membrane distillation.  

E-Print Network (OSTI)

??Invented in the 1960s, membrane distillation is an emerging technology for water treatment attracting more attention since 1980s. There are four configurations of membrane distillations… (more)

Zhang, Jianhua

2011-01-01T23:59:59.000Z

128

Webinar: Hydrogen Production by Polymer Electrolyte Membrane...  

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

Production by Polymer Electrolyte Membrane (PEM) Electrolysis-Spotlight on Giner and Proton Webinar: Hydrogen Production by Polymer Electrolyte Membrane (PEM) Electrolysis-Spotligh...

129

Extracorporeal membrane oxygenation promotes long chain fatty...  

NLE Websites -- All DOE Office Websites (Extended Search)

membrane oxygenation promotes long chain fatty acid oxidation in the immature swine heart in vivo. Extracorporeal membrane oxygenation promotes long chain fatty acid oxidation...

130

Controlling membrane protein folding using photoresponsive surfactant.  

E-Print Network (OSTI)

??Membrane proteins perform a number of roles in biological function. Membrane lipids can self assembly into numerous different phases in aqueous solution, including micelles, vesicles… (more)

Chang, Chia Hao

2012-01-01T23:59:59.000Z

131

Some durability considerations for proton exchange membranes...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Oct. 14, 2010 hightemphamrock.pdf More Documents & Publications New Membranes for PEM Fuel Cells Model Compound Studies of Fuel Cell Membrane Degradation Processing-Performance...

132

Sandia National Laboratories: fuel cell membrane  

NLE Websites -- All DOE Office Websites (Extended Search)

membrane ECIS-Automotive Fuel Cell Corporation: Hydrocarbon Membrane Fuels the Success of Future Generation Vehicles On February 14, 2013, in CRF, Energy, Energy Efficiency,...

133

ADVANCED MATERIALS Membranes for Clean Water  

E-Print Network (OSTI)

and security. Polymer-based membrane separation technologies based on reverse osmosis, forward osmosis active layer used in reverse osmosis membranes, interfacial polymerization of trimesoyl chloride (TMC

134

New Membranes for PEM Fuel Cells  

Energy.gov (U.S. Department of Energy (DOE))

Presentation on New Membranes for PEM Fuel Cells to the High Temperature Membrane Working Group Meeting held in Arlington, Virginia, May 26,2005.

135

Some durability considerations for proton exchange membranes  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

creates an aggressive environment for the electrolyte membrane. This includes: - Mechanical stresses related to changes in the level of membrane hydration. - Thermal...

136

Fullerene-Nafion Composite Recast Membranes  

Energy.gov (U.S. Department of Energy (DOE))

Presentation on Fullerene-Nafion Composite Recast Membranes to the High Temperature Membrane Working Group Meeting held in Arlington, Virginia, May 26,2005.

137

Gas Separations using Ceramic Membranes  

SciTech Connect

This project has been oriented toward the development of a commercially viable ceramic membrane for high temperature gas separations. A technically and commercially viable high temperature gas separation membrane and process has been developed under this project. The lab and field tests have demonstrated the operational stability, both performance and material, of the gas separation thin film, deposited upon the ceramic membrane developed. This performance reliability is built upon the ceramic membrane developed under this project as a substrate for elevated temperature operation. A comprehensive product development approach has been taken to produce an economically viable ceramic substrate, gas selective thin film and the module required to house the innovative membranes for the elevated temperature operation. Field tests have been performed to demonstrate the technical and commercial viability for (i) energy and water recovery from boiler flue gases, and (ii) hydrogen recovery from refinery waste streams using the membrane/module product developed under this project. Active commercializations effort teaming with key industrial OEMs and end users is currently underway for these applications. In addition, the gas separation membrane developed under this project has demonstrated its economical viability for the CO2 removal from subquality natural gas and landfill gas, although performance stability at the elevated temperature remains to be confirmed in the field.

Paul KT Liu

2005-01-13T23:59:59.000Z

138

Oxygen Transport Ceramic Membranes  

SciTech Connect

The present quarterly report describes some of the investigations on the structural properties of dense OTM bars provided by Praxair and studies on newer composition of Ti doped LSF. In this report, Moessbauer spectroscopy was used to study the local environmentals of LSFT with various level of oxygen deficiency. Ionic valence state, magnetic interaction and influence of Ti on superexchange are discussed Stable crack growth studies on Dense OTM bars provided by Praxair were done at elevated temperature, pressure and elevated conditions. Post-fracture X-ray data of the OTM fractured at 1000 C in environment were refined by FullProf code and results indicate a distortion of the parent cubic perovskite to orthorhombic structure with reduced symmetry. TGA-DTA studies on the post-fracture samples also indicated residual effect arising from the thermal and stress history of the samples. An electrochemical cell has been designed and built for measurements of the Seebeck coefficient as a function of temperature and pressure. The initial measurements on La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-{delta}} are reported. Neutron diffraction measurements of the same composition are in agreement with both the stoichiometry and the kinetic behavior observed in coulometric titration measurements. A series of isotope transients under air separation mode (small gradient) were completed on the membrane of LSCrF-2828 at 900 C. Low pO{sub 2} atmospheres based on with CO-CO{sub 2} mixtures have also been admitted to the delivery side of the LSCrF-2828 membrane to produce the gradients which exist under syngas generation conditions. The COCO{sub 2} mixtures have normal isotopic {sup 18}O abundances. The evolution of {sup 18}O on the delivery side in these experiments after an {sup 18}O pulse on the air side reveals a wealth of information about the oxygen transport processes.

S. Bandopadhyay; N. Nagabhushana; X.-D Zhou; Q. Cai; J. Yang; W.B. Yelon; W.J. James; H.U. Anderson; Alan Jacobson; C.A. Mims

2004-10-01T23:59:59.000Z

139

STUDYING MEMBRANE ANCHOR ORGANIZATION IN LIVING CELL MEMBRANES  

E-Print Network (OSTI)

17 Figure 2.2. PIE-FCCS acquisition generates cross-talkin Cell Membranes is Revealed by PIE-FCCS .. 11 2.115 2.3.5 PIE-

Huang, Hector Han-Li

2011-01-01T23:59:59.000Z

140

Design and demonstration of an improved stretched-membrane heliostat  

SciTech Connect

Improvements to a stretched-membrane heliostat have been designed and implemented under contract with Sandia National Laboratories. Specific improvements were made to the mirror module to improve performance and reduce costs. The performance of the heliostat in windy conditions was improved by adding a restraint to the rear membrane. An open-section ring was used to increase structural efficiency. The rear structure was redesigned to take advantage of common manufacturing techniques and lower cost materials. The control system was improved, and a means of achieving passive defocus was achieved. Finally, membrane preload was applied with nonconsumable tooling. An 8% reduction in mirror-module cost was realized. The improved design was successfully demonstrated with a 50-m{sup 2} prototype. This prototype had improved optical stability in fluctuating winds. Its slope error in calm winds was measured to be 1.3 mrad. 17 refs., 68 figs., 8 tabs.

Not Available

1989-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Oxygen Transport Ceramic Membranes  

SciTech Connect

The present quarterly report describes some of the investigations on the structural properties of dense OTM bars provided by Praxair and initial studies on newer composition of Ti doped LSF. Dense OTM bars provided by Praxair were loaded to fracture at varying stress rates. Studies were done at room temperature in air and at 1000 C in a specified environment to evaluate slow crack growth behavior. In addition, studies were also begun to obtain reliable estimates of fracture toughness and stable crack growth in specific environments. Newer composition of Ti doped LSF membranes were characterized by neutron diffraction analysis. Quench studies indicated an apparent correlation between the unit cell volume and oxygen occupancy. The studies however, indicated an anomaly of increasing Fe/Ti ratio with change in heat treatment. Ti doped LSF was also characterized for stoichiometry as a function of temp and pO{sub 2}. The non stoichiometry parameter {delta} was observed to increase almost linearly on lowering pO{sub 2} until a ideal stoichiometric composition of {delta} = 0.175 was approached.

S. Bandopadhyay; N. Nagabhushana; X.-D Zhou; W.B. Yelon; H.U. Anderson; Alan Jacobson; C.A. Mims

2004-02-01T23:59:59.000Z

142

Applied Science/Techniques  

NLE Websites -- All DOE Office Websites (Extended Search)

Applied Science/Techniques Applied Science/Techniques Applied Science/Techniques Print The ALS is an excellent incubator of new scientific techniques and instrumentation. Many of the technical advances that make the ALS a world-class soft x-ray facility are developed at the ALS itself. The optical components in use at the ALS-mirrors and lenses optimized for x-ray wavelengths-require incredibly high-precision surfaces and patterns (often formed through extreme ultraviolet lithography at the ALS) and must undergo rigorous calibration and testing provided by beamlines and equipment from the ALS's Optical Metrology Lab and Berkeley Lab's Center for X-Ray Optics. New and/or continuously improved experimental techniques are also a crucial element of a thriving scientific facility. At the ALS, examples of such "technique" highlights include developments in lensless imaging, soft x-ray tomography, high-throughput protein analysis, and high-power coherent terahertz radiation.

143

Information Science, Computing, Applied Math  

NLE Websites -- All DOE Office Websites (Extended Search)

Capabilities ISC Applied Math science-innovationassetsimagesicon-science.jpg Information Science, Computing, Applied Math National security depends on science and...

144

Alkaline Membrane Fuel Cell Workshop  

Energy.gov (U.S. Department of Energy (DOE))

A workshop on alkaline membrane fuel cells (AMFC) was held May 8-9, 2011, before the 2011 Hydrogen and Fuel Cells Annual Merit Review, at Crystal Gateway Marriott in Arlington, Virginia.

145

Layered plasma polymer composite membranes  

DOE Patents (OSTI)

Layered plasma polymer composite fluid separation membranes are disclosed, which comprise alternating selective and permeable layers for a total of at least 2n layers, where n is [>=]2 and is the number of selective layers. 2 figs.

Babcock, W.C.

1994-10-11T23:59:59.000Z

146

Membrane Separations of Liquid Mixtures  

E-Print Network (OSTI)

MEMBRANE SEPARATIONS OF LIQUID MIXTURES Douglas R. Lloyd Separations Research Program Department of Chemical Engineering The University of Texas at Austin Austin, Texas In recent years considerable attention has been given to the need... for reduced energy costs in the chemical processing industry. A major portion of the energy consumed in this industry is associated with the separation and recovery of chemicals. Membrane processes offer energy-efficient, cost effective methods...

Lloyd, D. R.

147

SUSTAINABILITY WHO CAN APPLY  

E-Print Network (OSTI)

FUNDED BY CALL FOR SUSTAINABILITY RESEARCH STUDENT WHO CAN APPLY Undergraduate and graduate Participate in the Global Change & Sustainability Center's Research Symposium; attend workshops with faculty or publish in the U's student-run sustainability publication to be released in May 2014. Are you conducting

148

Fast Membranes Hemifusion via Dewetting between Lipid Bilayers  

E-Print Network (OSTI)

The behavior of lipid bilayer is important to understand the functionality of cells like the trafficking of ions between cells. Standard procedures to explore the properties of lipid bilayer and hemifused states typically use either supported membranes or vesicles. Both techniques have several shortcoming in terms of bio relevance or accessibility for measurements. In this article the formation of individual free standing hemifused states between model cell membranes is studied using an optimized microfluidic scheme which allows for simultaneous optical and electrophysiological measurements. In a first step, two model membranes are formed at a desired location within a microfluidic device using a variation of the droplet interface bilayer (DiB) technique. In a second step, the two model membranes are brought into contact forming a single hemifused state. For all tested lipids, the hemifused state between free standing membranes form within hundreds of milliseconds, i.e. several orders of magnitude faster than reported in literature. The formation of a hemifused state is observed as a two stage process, whereas the second stage can be explained as a dewetting process in no-slip boundary condition. The formed hemifusion states are long living and a single fusion event can be observed when triggered by an applied electric field as demonstrated for monoolein.

Jose Nabor Vargas; Ralf Seemann; Jean-Baptiste Fleury

2014-09-20T23:59:59.000Z

149

Oxygen Transport Ceramic Membranes Quarterly Report  

E-Print Network (OSTI)

/Reaction rates in Ion 21 Transport Membranes using Isotope Tracer and Transient Kinetic Techniques CONCLUSIONS 30Oxygen Transport Ceramic Membranes Quarterly Report January 2003 ­ March 2003 Principal Authors on the thermodynamic properties of the membrane materials are continued to develop a complete model for the membrane

Eagar, Thomas W.

150

Membrane Technology Workshop Summary Report, November 2012  

Energy.gov (U.S. Department of Energy (DOE))

Final report summarizing discussions held at the Membrane Technology Workshop (July 24, 2012, Rosemont, Illinois)

151

Engineering Development of Ceramic Membrane Reactor  

E-Print Network (OSTI)

ceramic Ion Transport Membrane (ITM) reactor system for low-cost conversion of natural gas to hydrogen;7 A Revolutionary Technology Using Ceramic Membranes Ion Transport Membranes (ITM) ­ Non-porous multiEngineering Development of Ceramic Membrane Reactor Systems for Converting Natural Gas to Hydrogen

152

Ninth International Workshop on Plant Membrane Biology  

SciTech Connect

This report is a compilation of abstracts from papers which were discussed at a workshop on plant membrane biology. Topics include: plasma membrane ATP-ases; plant-environment interactions, membrane receptors; signal transduction; ion channel physiology; biophysics and molecular biology; vaculor H+ pumps; sugar carriers; membrane transport; and cellular structure and function.

Not Available

1993-12-31T23:59:59.000Z

153

Chapter 1. Basic principles of membrane contactors  

Science Journals Connector (OSTI)

Publisher Summary This chapter discusses the basic principles of membrane contactors. The membrane contactors identify the membrane systems that are employed to keep two phases in contact. To avoid the mixing of the two phases, the operating pressures must be controlled. The pressure of the aqueous/polar phase has to be equal to or higher than the pressure of the wetting/filling phase. In membrane strippers and scrubbers, a liquid is in contact with a gas, the difference between the two systems being the direction in which the species are transferred: from the liquid to the gas and vice versa, respectively. In supported liquid membranes, the micropores of the membrane are filled by an organic phase and the membrane is located between two aqueous phases. Membrane distillation is the only example of membrane contactor where the driving force is related to a temperature gradient across the membrane. Osmotic distillation performs the same work of the membrane distillation but uses a different method for creating the partial pressure gradient. Membrane crystallizers represent a particular application of membrane and osmotic distillation. Membrane emulsifiers employ both hydrophobic and hydrophilic membranes for creating microemulsions. Membrane contactors can be also used to carry out catalytic reactions.

2005-01-01T23:59:59.000Z

154

Hydrogen purifier module with membrane support  

DOE Patents (OSTI)

A hydrogen purifier utilizing a hydrogen-permeable membrane to purify hydrogen from mixed gases containing hydrogen is disclosed. Improved mechanical support for the permeable membrane is described, enabling forward or reverse differential pressurization of the membrane, which further stabilizes the membrane from wrinkling upon hydrogen uptake.

A hydrogen purifier utilizing a hydrogen-permeable membrane to purify hydrogen from mixed gases containing hydrogen is disclosed. Improved mechanical support for the permeable membrane is described, enabling forward or reverse differential pressurization of the membrane, which further stabilizes the membrane from wrinkling upon hydrogen uptake.

2012-07-24T23:59:59.000Z

155

Oxygen Transport Ceramic Membranes  

SciTech Connect

The present quarterly report describes some of the investigations on the structural properties of dense OTM bars provided by Praxair and studies on newer composition of Ti doped LSF. In this report, in situ neutron diffraction was used to characterize the chemical and structural properties of La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-{delta}} (here after as L2SF55T) specimen, which was subject to measurements of neutron diffraction from room temperature to 900 C in N{sub 2}. Space group of R3c was found to result in a better refinement and is used in this study. The difference for crystal structure, lattice parameters and local crystal chemistry for LSFT nearly unchanged when gas environment switched from air to N{sub 2}. Stable crack growth studies on Dense OTM bars provided by Praxair were done at room temperature in air. A bridge-compression fixture was fabricated to achieve stable pre-cracks from Vickers indents. Post fracture evaluation indicated stable crack growth from the indent and a regime of fast fracture. Post-fracture X-ray data of the OTM fractured at 1000 C in environment were refined by FullProf code and results indicate a distortion of the parent cubic perovskite to orthorhombic structure with reduced symmetry. TGA-DTA studies on the post-fracture samples also indicated residual effect arising from the thermal and stress history of the samples. The thermal and chemical expansion of La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-{delta}} were studied at 800 {le} T {le} 1000 C and at {approx} 1 x 10{sup -15} {le} pO{sub 2} {le} 0.21 atm. The thermal expansion coefficient of the sample was calculated from the dilatometric analysis in the temperature range between room temperature and 1200 C in air. A series of isotope transients under air separation mode (small gradient) were completed on the membrane of LSCrF-2828 at 900 C. Low pO{sub 2} atmospheres based on with CO-CO{sub 2} mixtures have also been admitted to the delivery side of the LSCrF-2828 membrane to produce the gradients which exist under syngas generation conditions. The CO-CO{sub 2} mixtures have normal isotopic {sup 18}O abundances. The evolution of {sup 18}O on the delivery side in these experiments after an {sup 18}O pulse on the air side reveals a wealth of information about the oxygen transport processes.

S. Bandopadhyay; N. Nagabhushana; X.-D Zhou; Q. Cai; J. Yang; W.B. Yelon; W.J. James; H.U. Anderson; Alan Jacobson; C.A. Mims

2004-05-01T23:59:59.000Z

156

Computational and experimental study of nanoporous membranes for water desalination and decontamination.  

SciTech Connect

Fundamentals of ion transport in nanopores were studied through a joint experimental and computational effort. The study evaluated both nanoporous polymer membranes and track-etched nanoporous polycarbonate membranes. The track-etched membranes provide a geometrically well characterized platform, while the polymer membranes are more closely related to ion exchange systems currently deployed in RO and ED applications. The experimental effort explored transport properties of the different membrane materials. Poly(aniline) membranes showed that flux could be controlled by templating with molecules of defined size. Track-etched polycarbonate membranes were modified using oxygen plasma treatments, UV-ozone exposure, and UV-ozone with thermal grafting, providing an avenue to functionalized membranes, increased wettability, and improved surface characteristic lifetimes. The modeling effort resulted in a novel multiphysics multiscale simulation model for field-driven transport in nanopores. This model was applied to a parametric study of the effects of pore charge and field strength on ion transport and charge exclusion in a nanopore representative of a track-etched polycarbonate membrane. The goal of this research was to uncover the factors that control the flux of ions through a nanoporous material and to develop tools and capabilities for further studies. Continuation studies will build toward more specific applications, such as polymers with attached sulfonate groups, and complex modeling methods and geometries.

Hickner, Michael A. (Penn State University, University Park, PA); Chinn, Douglas Alan (Sandia National Laboratories, Albuquerque, NM); Adalsteinsson, Helgi; Long, Kevin R. (Texas Tech University, Lubbock, TX); Kent, Michael Stuart (Sandia National Laboratories, Albuquerque, NM); Debusschere, Bert J.; Zendejas, Frank J.; Tran, Huu M.; Najm, Habib N.; Simmons, Blake Alexander

2008-11-01T23:59:59.000Z

157

A unified model for the detailed investigation of membrane modules and RO plants performance  

Science Journals Connector (OSTI)

In this work a straightforward procedure for the detailed investigation of the performance of the membrane modules and RO plants has been suggested. The analysis is based on analytical equations for a two dimensional flow of two components and determines the permeate flow rate and the quality of the produced water. A software was developed, based in the proposed mathematical model, which can predict the brine and permeate characteristics for every individual membrane module in the pressure vessels in an RO plant, regardless of the type of the membranes. The predictions of the proposed software were verified by experimental data for a 380 m3/d RO plant, with 8'' membrane module made by FilmTec. An excellent agreement was found between the prediction of the suggested model and the experimental data. The membrane performance predictions of the developed software were also compared and verified with the predictions made by commercial softwares of different membrane producers. The model can make prediction for any parameter at any point of the process. An equation for the permeate pressure in the membrane envelop was developed and the permeate pressure profile was presented and suggestions were made for possible weak points of the membrane envelops. It is believed that the analytical model which is presented in this work is a simple, accurate and quick procedure for modeling the RO plants performance and it can be applied in any type of membrane modul

S.A. Avlonitis; M. Pappas; K. Moutesidis

2007-01-01T23:59:59.000Z

158

Wind effects on a stretched membrane heliostat  

SciTech Connect

Wind effects on stretched membrane heliostat were investigated in a boundary layer wind tunnel. The membrane response was measured at stow and representative operational conditions. It was found that both at the stow and operational conditions the mean response was much higher than the rms response. At stow conditions the largest response occurred near the leading edge of the membrane, while the rms response was the largest at the membrane center point. For the operational conditions, the largest mean and rms responses were found at the membrane centerpoint. The membrane response was significantly reduced by the membrane focusing induced through the internal underpressure.

Bienkiewicz, B. (Colorado State Univ., Fort Collins, CO (United States). Dept. of Civil Engineering)

1993-08-01T23:59:59.000Z

159

Anisotropic surface tension of buckled fluid membrane  

E-Print Network (OSTI)

Solid sheets and fluid membranes exhibit buckling under lateral compression. Here, it is revealed that fluid membranes have anisotropic buckling surface tension contrary to solid sheets. Surprisingly, the surface tension perpendicular to the buckling direction shows stronger dependence than that parallel to it. Our theoretical predictions are supported by numerical simulations of a meshless membrane model. This anisotropic tension can be used to measure the membrane bending rigidity. It is also found phase synchronization occurs between multilayered buckled membranes.

Hiroshi Noguchi

2011-06-01T23:59:59.000Z

160

Applied Science/Techniques  

NLE Websites -- All DOE Office Websites (Extended Search)

Applied Science/Techniques Print Applied Science/Techniques Print The ALS is an excellent incubator of new scientific techniques and instrumentation. Many of the technical advances that make the ALS a world-class soft x-ray facility are developed at the ALS itself. The optical components in use at the ALS-mirrors and lenses optimized for x-ray wavelengths-require incredibly high-precision surfaces and patterns (often formed through extreme ultraviolet lithography at the ALS) and must undergo rigorous calibration and testing provided by beamlines and equipment from the ALS's Optical Metrology Lab and Berkeley Lab's Center for X-Ray Optics. New and/or continuously improved experimental techniques are also a crucial element of a thriving scientific facility. At the ALS, examples of such "technique" highlights include developments in lensless imaging, soft x-ray tomography, high-throughput protein analysis, and high-power coherent terahertz radiation.

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161

Fabrication of catalyzed ion transport membrane systems  

DOE Patents (OSTI)

Process for fabricating a catalyzed ion transport membrane (ITM). In one embodiment, an uncatalyzed ITM is (a) contacted with a non-reducing gaseous stream while heating to a temperature and for a time period sufficient to provide an ITM possessing anion mobility; (b) contacted with a reducing gaseous stream for a time period sufficient to provide an ITM having anion mobility and essentially constant oxygen stoichiometry; (c) cooled while contacting the ITM with the reducing gaseous stream to provide an ITM having essentially constant oxygen stoichiometry and no anion mobility; and (d) treated by applying catalyst to at least one of (1) a porous mixed conducting multicomponent metallic oxide (MCMO) layer contiguous with a first side of a dense layer of MCMO and (2) a second side of the dense MCMO layer. In another embodiment, these steps are carried out in the alternative order of (a), (d), (b), and (c).

Carolan, Michael Francis; Kibby, Charles Leonard

2013-06-04T23:59:59.000Z

162

Sacrificial Protective Coating Materials That Can Be Regenerated In-Situ to Enable High-Performance Membranes  

Energy.gov (U.S. Department of Energy (DOE))

Fact sheet describing project that will leverage research and materials from a previously developed, low-cost coating process and apply the re¬search to lower cost polymer membranes

163

Electrochemical control of ion transport through a mesoporous carbon membrane  

SciTech Connect

The transport of fluids through nanometer scale channels typically on the order of 1 -100 nm often exhibit unique properties compared to the bulk fluid. These phenomena occur because the channel dimensions and molecular size become comparable to the range of several important forces including electrostatic and van der Waals forces. Small changes in properties such as the electric double layer or surface charge can significantly affect molecular transport through the channels. Based on these emerging properties, a variety of nanofluidic devices such as nanofluidic transistors, nanofluidic diodes or lab-on-a-chip devices have been developed3-7 with a diverse range of applications including water purification, biomolecular sensing, DNA separation, and rectified ion transport. Nanofluidic devices are typically fabricated using expensive lithography techniques or sacrificial templates. Here we report a carbon-based, three-dimensional nanofluidic transport membrane that enables gated, or on/off, control of the transport of organic molecular species and metal ions using an applied electrical potential. In the absence of an applied potential, both cationic and anionic molecules freely diffuse across the membrane via a concentration gradient. However, when an electrochemical potential is applied, the transport of ions through the membrane is inhibited.

Surwade, Sumedh P [ORNL] [ORNL; Chai, Songhai [ORNL] [ORNL; Choi, Jai-Pil [ORNL] [ORNL; Wang, Xiqing [ORNL] [ORNL; Lee, Jeseung [ORNL] [ORNL; Vlassiouk, Ivan V [ORNL] [ORNL; Mahurin, Shannon Mark [ORNL] [ORNL; Dai, Sheng [ORNL] [ORNL

2014-01-01T23:59:59.000Z

164

Durable, Low Cost, Improved Fuel Cell Membranes  

NLE Websites -- All DOE Office Websites (Extended Search)

Durable, Low-cost, Improved Durable, Low-cost, Improved Fuel Cell Membranes US Department of Energy Office of Hydrogen, Fuel Cells and Infrastructure Technologies Kickoff Meeting, Washington DC, February 13, 2007 Michel Fouré Project Objectives z To develop a low cost (vs. perfluorosulfonated ionomers), durable membrane. z To develop a membrane capable at 80°C at low relative humidity (25-50%). z To develop a membrane capable of operating at 120°C for brief periods of time. z To elucidate membrane degradation and failure mechanisms. U:jen/slides/pres.07/FC kickoff Washington DC 2-13-07 2 Technical Barriers Addressed z Membrane Cost z Membrane Durability z Membrane capability to operate at low relative humidity. z Membrane capability to operate at 120ºC for brief period of times.

165

High Temperature Membrane & Advanced Cathode Catalyst Development  

SciTech Connect

Current project consisted of three main phases and eighteen milestones. Short description of each phase is given below. Table 1 lists program milestones. Phase 1--High Temperature Membrane and Advanced Catalyst Development. New polymers and advanced cathode catalysts were synthesized. The membranes and the catalysts were characterized and compared against specifications that are based on DOE program requirements. The best-in-class membranes and catalysts were downselected for phase 2. Phase 2--Catalyst Coated Membrane (CCM) Fabrication and Testing. Laboratory scale catalyst coated membranes (CCMs) were fabricated and tested using the down-selected membranes and catalysts. The catalysts and high temperature membrane CCMs were tested and optimized. Phase 3--Multi-cell stack fabrication. Full-size CCMs with the down-selected and optimized high temperature membrane and catalyst were fabricated. The catalyst membrane assemblies were tested in full size cells and multi-cell stack.

Protsailo, Lesia

2006-04-20T23:59:59.000Z

166

Applied ALARA techniques  

SciTech Connect

The presentation focuses on some of the time-proven and new technologies being used to accomplish radiological work. These techniques can be applied at nuclear facilities to reduce radiation doses and protect the environment. The last reactor plants and processing facilities were shutdown and Hanford was given a new mission to put the facilities in a safe condition, decontaminate, and prepare them for decommissioning. The skills that were necessary to operate these facilities were different than the skills needed today to clean up Hanford. Workers were not familiar with many of the tools, equipment, and materials needed to accomplish:the new mission, which includes clean up of contaminated areas in and around all the facilities, recovery of reactor fuel from spent fuel pools, and the removal of millions of gallons of highly radioactive waste from 177 underground tanks. In addition, this work has to be done with a reduced number of workers and a smaller budget. At Hanford, facilities contain a myriad of radioactive isotopes that are 2048 located inside plant systems, underground tanks, and the soil. As cleanup work at Hanford began, it became obvious early that in order to get workers to apply ALARA and use hew tools and equipment to accomplish the radiological work it was necessary to plan the work in advance and get radiological control and/or ALARA committee personnel involved early in the planning process. Emphasis was placed on applying,ALARA techniques to reduce dose, limit contamination spread and minimize the amount of radioactive waste generated. Progress on the cleanup has,b6en steady and Hanford workers have learned to use different types of engineered controls and ALARA techniques to perform radiological work. The purpose of this presentation is to share the lessons learned on how Hanford is accomplishing radiological work.

Waggoner, L.O.

1998-02-05T23:59:59.000Z

167

for Applied Linguistics.  

E-Print Network (OSTI)

per calendar year, promptly at intervals of three months. Each pack is to contain two numbers of the Finite String. The difficulties of the first year of publication of AJCL are responsible for the d'elayed, production of this ~ack, which also contains Volume 11, Number 4 of TFS. ~k would be a rash editor indeed who guaranteed promptness without caveat. The present editbr must warn the subscriber that'the end of the diLf.iculti-es is not yet fixed for a date certa.in. AMERICAN JQURNAL OF COMPL'TATIONAL LINGUISTICS is published by the Center for Applied Linguistics for the Association for Computational Linguistics.

Assistant Nancy Jokovl Ch

168

Multicomponent Transport through Realistic Zeolite Membranes: Characterization & Transport in Nanoporous Networks  

SciTech Connect

These research studies focused on the characterization and transport for porous solids which comprise both microporosity and mesoporosity. Such materials represent membranes made from zeolites as well as for many new nanoporous solids. Several analytical sorption techniques were developed and evaluated by which these multi-dimensional porous solids could be quantitatively characterized. Notably an approach by which intact membranes could be studied was developed and applied to plate-like and tubular supported zeolitic membranes. Transport processes were studied experimentally and theoretically based on the characterization studies.

William C. Conner

2007-08-02T23:59:59.000Z

169

Universal Membrane Classification Scheme: Maximizing the Return on High Temperature PEM Membrane Research  

Energy.gov (U.S. Department of Energy (DOE))

This presentation on maximizing the return of high temperature PEM membrane research was given at the High Temperature Membrane Working Group Meeting in May 2007.

170

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

DOE Patents (OSTI)

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

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

2001-01-01T23:59:59.000Z

171

Applied Optoelectronics | Open Energy Information  

Open Energy Info (EERE)

Optoelectronics Jump to: navigation, search Name: Applied Optoelectronics Place: Sugar Land, Texas Zip: 77478 Product: Applied Optoelectronics designs, develops, and manufactures...

172

ORISE: Applied health physics projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Applied health physics projects The Oak Ridge Institute for Science and Education (ORISE) provides applied health physics services to government agencies needing technical support...

173

Stretched-membrane heliostat technology  

SciTech Connect

The stretched-membrane concept is a potentially low-cost and structurally efficient method of attaining and supporting a large, optically accurate surface for heliostat applications. In this concept, a high-strength structural film coated with a highly reflective surface is stretched uniformly on a torroidal frame. Prior and current research, directed at allowing the full potential of this novel concept to be realized, is described. Technical issues and results described include membrane attachment approaches, focusing, and the numerous structural response mechanisms specific to this concept.

Murphy, L.M.

1986-08-01T23:59:59.000Z

174

Production of permeable cellulose triacetate membranes  

DOE Patents (OSTI)

A phase inversion process for the preparation of cellulose triacetate (CTA) and regenerated cellulose membranes is disclosed. Such membranes are useful as supports for liquid membranes in facilitated transport processes, as microfiltration membranes, as dialysis or ultrafiltration membranes, and for the preparation of ion-selective electrodes. The process comprises the steps of preparing a casting solution of CTA in a solvent comprising a mixture of cyclohexanone and methylene chloride, casting a film from the casting solution, and immersing the cast film in a methanol bath. The resulting CTA membrane may then be hydrolyzed to regenerated cellulose using conventional techniques.

Johnson, B.M.

1986-12-23T23:59:59.000Z

175

Production of permeable cellulose triacetate membranes  

DOE Patents (OSTI)

A phase inversion process for the preparation of cellulose triacetate (CTA) and regenerated cellulose membranes is disclosed. Such membranes are useful as supports for liquid membranes in facilitated transport processes, as microfiltration membranes, as dialysis or ultrafiltration membranes, and for the preparation of ion-selective electrodes. The process comprises the steps of preparing a casting solution of CTA in a solvent comprising a mixture of cyclohexanone and methylene chloride, casting a film from the casting solution, and immersing the cast film in a methanol bath. The resulting CTA membrane may then be hydrolyzed to regenerated cellulose using conventional techniques.

Johnson, Bruce M. (Bend, OR)

1986-01-01T23:59:59.000Z

176

Membrane applications to control VOC emissions  

SciTech Connect

A thin film composite membrane to separate and recover organic vapors is briefly described. The membrane is designed for end of pipe installation with a separation efficiency of greater than 90%. The main components of the membrane system are feed compressor, vacuum pump, and membrane modules. The paper focuses on operating characteristics of the membrane, and provides data on various ideal selectivities for organics; dependence of toluene/nitrogen selectivity and stage cut on flow velocity; and dependence of plant capacity, recovery rate, pressure ratio, stage cut, retentate concentration, and specific energy consumption on membrane area for gasoline vapor separation process conditions. 5 refs., 6 figs., 1 tab.

Ohlrogge, K.; Wind, J. [GKSS Research Center, Geesthacht (Germany)

1996-12-31T23:59:59.000Z

177

Solvent-resistant microporous polymide membranes  

DOE Patents (OSTI)

An asymmetric microporous membrane with exceptional solvent resistance and highly desirable permeability is disclosed. The membrane is made by a solution-casting or solution-spinning process from a copolyamic acid comprising the condensation reaction product in a solvent of at least three reactants selected from certain diamines and dianhydrides and post-treated to imidize and in some cases cross-link the copolyamic acid. The membrane is useful as an uncoated membrane for ultrafiltration, microfiltration, and membrane contactor applications, or may be used as a support for a permselective coating to form a composite membrane useful in gas separations, reverse osmosis, nanofiltration, pervaporation, or vapor permeation.

Miller, W.K.; McCray, S.B.; Friesen, D.T.

1998-03-10T23:59:59.000Z

178

Solvent-resistant microporous polymide membranes  

DOE Patents (OSTI)

An asymmetric microporous membrane with exceptional solvent resistance and highly desirable permeability is disclosed. The membrane is made by a solution-casting or solution-spinning process from a copolyamic acid comprising the condensation reaction product in a solvent of at least three reactants selected from certain diamines and dianhydrides and post-treated to imidize and in some cases cross-link the copolyamic acid. The membrane is useful as an uncoated membrane for ultrafiltration, microfiltration, and membrane contactor applications, or may be used as a support for a permselective coating to form a composite membrane useful in gas separations, reverse osmosis, nanofiltration, pervaporation, or vapor permeation.

Miller, Warren K. (Bend, OR); McCray, Scott B. (Bend, OR); Friesen, Dwayne T. (Bend, OR)

1998-01-01T23:59:59.000Z

179

Spectroscopic studies of tryptophan and membrane- associated peptides  

E-Print Network (OSTI)

Thermodynamics of membrane protein folding measured byThermodynamics of Membrane Protein Folding: Lessons from theKim, Thermodynamics of membrane protein folding measured by

Schlamadinger, Diana Elizabeth

2011-01-01T23:59:59.000Z

180

Membrane and MEA Accelerated Stress Test Protocols | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Membrane and MEA Accelerated Stress Test Protocols Membrane and MEA Accelerated Stress Test Protocols This presentation on fuel cell membrane and MEA stress test protocols was...

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Separation of heavy metals from industrial waste streams by membrane separation technology  

SciTech Connect

Industrial membrane technology is becoming increasingly attractive as a low-cost generic separation technique for volume reduction, recovery, and/or purification of the liquid phase and concentration and/or recovery of the contaminant or solute. It offers outstanding future potential in the reduction and/or recycling of hazardous pollutants from waste streams. Membrane separation technology may include: (1) commercial processes such as electrodialysis, reverse osmosis, nanofiltration, and ultrafiltration and (2) the development of hybrid processes such as liquid membranes, Donnan dialysis, and membrane bioreactor technology. Membrane separation technology as applied to waste treatment/reduction and environmental engineering problems has several advantages over conventional treatment processes. In contrast to distillation and solvent extraction membrane separation is achieved without a phase change and use of expensive solvents. The advantages of this technology are (1) low energy requirements; (2) small volumes of retentate that need to be handled; (3) selective removal of pollutants with the use of complexing agents and biocatalysts or by membrane surface modification; (4) the possibility for achieving zero discharge'' with reuse of product water, binding media and target, compounds; (5) continuous operation; (6) modular design without significant size limitations; (7) discrete membrane barrier to ensure physical separation of contaminants; and (8) minimal labor requirement.

Yichu Huang; Koseoglu, S.S. (Texas A and M Univ. System, College Station, TX (United States). Engineering Biosciences Research Center)

1993-01-01T23:59:59.000Z

182

Protein Flips Lipids Across Membranes  

NLE Websites -- All DOE Office Websites (Extended Search)

Protein Flips Lipids Across Membranes Print Protein Flips Lipids Across Membranes Print Found ubiquitously in both bacteria and humans, membrane proteins of the adenosine triphosphate (ATP)-binding cassette (ABC) transporter family have been implicated in both antibiotic and cancer-drug resistance. The mechanisms used by these proteins to expel toxins from cells therefore represent key targets for the development of drugs designed to combat the growing problem of multidrug resistance. Toward this end, researchers from The Scripps Research Institute have succeeded in crystallizing MsbA-an ABC transporter protein-together with a substrate (the molecule to be transported) and a hydrolyzed (spent) form of the nucleotide ATP, the transporter's source of chemical energy. The resulting molecular complex is caught at a moment following the transporter's "power stroke," the force-generating part of the transport cycle. This snapshot suggests a mechanism by which the substrate molecule gets flipped head-over-tail from one side of the membrane to the other, on its way out of the cell.

183

Protein Flips Lipids Across Membranes  

NLE Websites -- All DOE Office Websites (Extended Search)

Protein Flips Lipids Across Protein Flips Lipids Across Membranes Protein Flips Lipids Across Membranes Print Wednesday, 26 October 2005 00:00 Found ubiquitously in both bacteria and humans, membrane proteins of the adenosine triphosphate (ATP)-binding cassette (ABC) transporter family have been implicated in both antibiotic and cancer-drug resistance. The mechanisms used by these proteins to expel toxins from cells therefore represent key targets for the development of drugs designed to combat the growing problem of multidrug resistance. Toward this end, researchers from The Scripps Research Institute have succeeded in crystallizing MsbA-an ABC transporter protein-together with a substrate (the molecule to be transported) and a hydrolyzed (spent) form of the nucleotide ATP, the transporter's source of chemical energy. The resulting molecular complex is caught at a moment following the transporter's "power stroke," the force-generating part of the transport cycle. This snapshot suggests a mechanism by which the substrate molecule gets flipped head-over-tail from one side of the membrane to the other, on its way out of the cell.

184

Protein Flips Lipids Across Membranes  

NLE Websites -- All DOE Office Websites (Extended Search)

Protein Flips Lipids Across Membranes Print Protein Flips Lipids Across Membranes Print Found ubiquitously in both bacteria and humans, membrane proteins of the adenosine triphosphate (ATP)-binding cassette (ABC) transporter family have been implicated in both antibiotic and cancer-drug resistance. The mechanisms used by these proteins to expel toxins from cells therefore represent key targets for the development of drugs designed to combat the growing problem of multidrug resistance. Toward this end, researchers from The Scripps Research Institute have succeeded in crystallizing MsbA-an ABC transporter protein-together with a substrate (the molecule to be transported) and a hydrolyzed (spent) form of the nucleotide ATP, the transporter's source of chemical energy. The resulting molecular complex is caught at a moment following the transporter's "power stroke," the force-generating part of the transport cycle. This snapshot suggests a mechanism by which the substrate molecule gets flipped head-over-tail from one side of the membrane to the other, on its way out of the cell.

185

Hybrid Membranes for Light Gas Separations  

E-Print Network (OSTI)

Membrane separations provide a potentially attractive technology over conventional processes due to their advantages, such as low capital cost and energy consumption. The goal of this thesis is to design hybrid membranes that facilitate specific gas...

Liu, Ting

2012-07-16T23:59:59.000Z

186

Energy Conservation Possibilities Using Gas Separating Membranes  

E-Print Network (OSTI)

The separation of gases using semi permeable membranes is a viable unit operation. A novel composite membrane combined with hollow fiber spinning technology enable Monsanto Co. to offer PRISM (TM); Separators to the industrial market. The separator...

Knieriem, H.; Henis, J. M. S.

1980-01-01T23:59:59.000Z

187

membrane-mtr | netl.doe.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

developing a new type of membrane contactor (or mega-module) to separate carbon dioxide (CO2) from power plant flue gas. This module's membrane area is 500 square meters, 20 to 25...

188

Energy Recovery Ventilator Membrane Efficiency Testing  

E-Print Network (OSTI)

A test setup was designed and built to test energy recovery ventilator membranes. The purpose of this test setup was to measure the heat transfer and water vapor transfer rates through energy recover ventilator membranes and find their effectiveness...

Rees, Jennifer Anne

2013-05-07T23:59:59.000Z

189

Single Molecule Probes of Lipid Membrane Structure  

E-Print Network (OSTI)

structural metrics with function in biological membranes. Single-molecule fluorescence studies were used to measure membrane structure at the molecular level. Several groups have shown that polarized total internal reflection fluorescence microscopy (PTIRF...

Livanec, Philip W.

2009-12-14T23:59:59.000Z

190

Electrodialysis with Bipolar Membranes for Sustainable Development  

Science Journals Connector (OSTI)

Electrodialysis with Bipolar Membranes for Sustainable Development ... A mathematical model of a typical three-compartment electrodialysis with bipolar membranes (EDBM) process has been developed to calculate the energy consumption and total cost of the process. ...

Chuanhui Huang; Tongwen Xu

2006-07-22T23:59:59.000Z

191

Predicting the vibrations of a spinning inflated membrane  

SciTech Connect

The primary difficulty of computing the vibration of spinning inflated membranes arises from the low natural frequencies of such systems. When such systems are rotated near their own natural frequencies the dynamics equations must account for higher order kinematics than is necessary for more rigid structures. These complications results from the membrane loads that develop within the bodies in reaction to the accelerations of the overall body. When second order kinematics act against these membrane loads, the resulting energies become of the same order as the potential and kinetic energies of the vibrations that would be calculated by first order kinematics. These complications apply to the problem addressed here. Here we consider a spin-stabilized, inflated membrane, spinning around its minor axis. This structure is very flexible and somewhat viscoelastic, so vibrations excited by the overall motion of the structure will dissipate energy of the system, thus reducing the kinetic energy. A reduction in kinetic energy consistent with a conservation of angular momentum results in coning and, eventually, tumbling. Here we must address the excitation of vibration by the rigid-body motion and then we must address the retarding effect of the energy dissipation on the rigid-body motion.

Segalman, D.J.; Slavin, A.

1993-04-01T23:59:59.000Z

192

Table II: Technical Targets for Membranes: Automotive  

Energy.gov (U.S. Department of Energy (DOE))

Technical targets for fuel cell membranes in automotive applications defined by the High Temperature Working Group (February 2003).

193

Challenges in Bio-Inspired Membranes  

Energy.gov (U.S. Department of Energy (DOE))

Presentation by Jun Lin (Pacific Northwest National Laboratory, PNNL) for the Membrane Technology Workshop held July 24, 2012

194

Review of Historical Membrane Workshop Results  

Energy.gov (U.S. Department of Energy (DOE))

Presentation by Sharon Robinson (Oak Ridge National Laboratory) for the Membrane Technology Workshop held July 24, 2012

195

Table IV: Technical Targets for Membranes: Stationary  

Energy.gov (U.S. Department of Energy (DOE))

"Technical targets for fuel cell membranes in stationary applications defined by the High Temperature Working Group (February 2003). "

196

Agenda: High Temperature Membrane Working Group Meeting  

Energy.gov (U.S. Department of Energy (DOE))

Agenda for the High Temperature Membrane Working Group (HTMWG) meeting on May 18, 2009, in Arlington, Virginia

197

Journal of Membrane Science 239 (2004) 1726 Highly conductive ordered heterogeneous ion-exchange membranes  

E-Print Network (OSTI)

in the matrix required for reasonable ion transport through the membrane is 50­70 wt.% [2Journal of Membrane Science 239 (2004) 17­26 Highly conductive ordered heterogeneous ion-exchange membranes are used in electrodialysis (ED) as ion-selective membranes and in power sources (such as fuel

Freger, Viatcheslav "Slava"

198

PEM Electrolyzer Incorporating an Advanced Low Cost Membrane  

Energy Savers (EERE)

Virginia Tech University (Academic)- Membrane Development Collaborations 3M Fuel Cell Components Program- NSTF Catalyst & Membrane Entegris - Carbon Cell Separators...

199

School of Applied Technology School of Applied Technology  

E-Print Network (OSTI)

School of Applied Technology School of Applied Technology Daniel F. and Ada L. Rice Campus Illinois Institute of Technology 201 E. Loop Road Wheaton, IL 60187 630.682.6000 www.iit.edu/applied tech/ Dean and Academic Director, Information Technology and Management Programs: C. Robert Carlson Director of Operations

Heller, Barbara

200

School of Applied Technology School of Applied Technology  

E-Print Network (OSTI)

School of Applied Technology School of Applied Technology Daniel F. and Ada L. Rice Campus Illinois Institute of Technology 201 E. Loop Road Wheaton, IL 60187 630.682.6000 www.iit.edu/applied tech/ Dean Technology and Management Programs: Mazin Safar Director, Marketing & Development: Scott Pfeiffer Director

Heller, Barbara

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Membranes solve North Sea waterflood sulfate problems  

SciTech Connect

To prevent barium sulfate scale from forming in the North Sea Brae field producing wells, Marathon Oil Co. UK Ltd. is successfully employing thin-film composite (nanofiltration) membranes for removing sulfate from injected seawater. In the early 1980s, FilmTec Corp., a Dow Chemical Co. subsidiary, first developed these composite membranes, which now are in their third generation. Marathon Oil Co. holds the patent for the specific nanofiltration membrane process for mitigating scale formation and deleterious reservoir effects. This first article in a three-part series describes membrane technology. The remaining articles detail specific membrane performance characteristics and field experiences in the Brae fields.

Davis, R. [Dow Chemical Co., Midland, MI (United States); Lomax, I. [Dow Chemical Co., Dubai (United Arab Emirates); Plummer, M. [Marathon Oil Co., Littleton, CO (United States)

1996-11-25T23:59:59.000Z

202

Process for restoring membrane permeation properties  

DOE Patents (OSTI)

A process for restoring the selectivity of high-flee-volume, glassy polymer membranes for condensable components over less-condensable components or non-condensable components of a gas mixture. The process involves exposing the membrane to suitable sorbent vapor, such as propane or butane, thereby reopening the microvoids that make up the free volume. The selectivity of an aged membrane may be restored to 70-100% of its original value. The selectivity of a membrane which is known to age over time can also be maintained by keeping the membrane in a vapor environment when it is not in use.

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

1997-05-20T23:59:59.000Z

203

Process for restoring membrane permeation properties  

DOE Patents (OSTI)

A process is described for restoring the selectivity of high-free-volume, glassy polymer membranes for condensable components over less-condensable components or non-condensable components of a gas mixture. The process involves exposing the membrane to suitable sorbent vapor, such as propane or butane, thereby reopening the microvoids that make up the free volume. The selectivity of an aged membrane may be restored to 70--100% of its original value. The selectivity of a membrane which is known to age over time can also be maintained by keeping the membrane in a vapor environment when it is not in use. 8 figs.

Pinnau, I.; Toy, L.G.; Casillas, C.G.

1997-05-20T23:59:59.000Z

204

Pollution prevention drives membrane technologies  

SciTech Connect

Currently, such membrane technologies as crossflow micro-, ultra-, and nanofiltration, reverse osmosis, electrodialysis and pervaporation offer interesting possibilities, each tackling a specific aspect of pollution control. Although none of these methods can, on its own, alter or break down pollutants, each has the ability to separate, fractionate and concentrate contaminants. In addition, they: permit continuous, uninterrupted processing via automatic control; use far less energy than traditional treatment methods; require only minimal temperature changes and no chemical additives; exert no impact on contaminants, and keep them physically separated from the stream; and are easy to install, either alone or combined with other treatment systems, since they are modular and contain few moving parts. The paper discusses the benefits and disadvantages of membrane technology and recommends thorough testing.

Cartwright, P.

1994-09-01T23:59:59.000Z

205

NETL: Hydrogen Selective Exfoliated Zeolite Membranes  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Selective Exfoliated Zeolite Membranes Hydrogen Selective Exfoliated Zeolite Membranes Project No.: DE-FE0001322 The University of Minnesota is developing a technically and economically viable membrane for carbon dioxide (CO2) separation from typical water-gas-shift (WGS) mixture feeds. The goal of this project is to further develop recently developed membrane technology based on exfoliated zeolite coatings as components for carbon capture in integrated gasification combined cycle plants. These membranes have the potential to contribute to carbon capture by high-temperature separation of hydrogen from CO2 and other gases present in shifted synthesis gas. Molecular sieve membrane for the pre-combustion capture of CO2. Molecular sieve membrane for the pre-combustion capture of CO2. Related Papers and Publications:

206

Ion transport membrane module and vessel system  

DOE Patents (OSTI)

An ion transport membrane system comprising (a) a pressure vessel having an interior, an exterior, an inlet, and an outlet; (b) a plurality of planar ion transport membrane modules disposed in the interior of the pressure vessel and arranged in series, each membrane module comprising mixed metal oxide ceramic material and having an interior region and an exterior region, wherein any inlet and any outlet of the pressure vessel are in flow communication with exterior regions of the membrane modules; and (c) one or more gas manifolds in flow communication with interior regions of the membrane modules and with the exterior of the pressure vessel. The ion transport membrane system may be utilized in a gas separation device to recover oxygen from an oxygen-containing gas or as an oxidation reactor to oxidize compounds in a feed gas stream by oxygen permeated through the mixed metal oxide ceramic material of the membrane modules.

Stein, VanEric Edward (Allentown, PA); Carolan, Michael Francis (Allentown, PA); Chen, Christopher M. (Allentown, PA); Armstrong, Phillip Andrew (Orefield, PA); Wahle, Harold W. (North Canton, OH); Ohrn, Theodore R. (Alliance, OH); Kneidel, Kurt E. (Alliance, OH); Rackers, Keith Gerard (Louisville, OH); Blake, James Erik (Uniontown, OH); Nataraj, Shankar (Allentown, PA); Van Doorn, Rene Hendrik Elias (Obersulm-Willsbach, DE); Wilson, Merrill Anderson (West Jordan, UT)

2012-02-14T23:59:59.000Z

207

Ion transport membrane module and vessel system  

DOE Patents (OSTI)

An ion transport membrane system comprising (a) a pressure vessel having an interior, an exterior, an inlet, and an outlet; (b) a plurality of planar ion transport membrane modules disposed in the interior of the pressure vessel and arranged in series, each membrane module comprising mixed metal oxide ceramic material and having an interior region and an exterior region, wherein any inlet and any outlet of the pressure vessel are in flow communication with exterior regions of the membrane modules; and (c) one or more gas manifolds in flow communication with interior regions of the membrane modules and with the exterior of the pressure vessel.The ion transport membrane system may be utilized in a gas separation device to recover oxygen from an oxygen-containing gas or as an oxidation reactor to oxidize compounds in a feed gas stream by oxygen permeated through the mixed metal oxide ceramic material of the membrane modules.

Stein, VanEric Edward (Allentown, PA); Carolan, Michael Francis (Allentown, PA); Chen, Christopher M. (Allentown, PA); Armstrong, Phillip Andrew (Orefield, PA); Wahle, Harold W. (North Canton, OH); Ohrn, Theodore R. (Alliance, OH); Kneidel, Kurt E. (Alliance, OH); Rackers, Keith Gerard (Louisville, OH); Blake, James Erik (Uniontown, OH); Nataraj, Shankar (Allentown, PA); van Doorn, Rene Hendrik Elias (Obersulm-Willsbach, DE); Wilson, Merrill Anderson (West Jordan, UT)

2008-02-26T23:59:59.000Z

208

Photo-switchable membrane and method  

DOE Patents (OSTI)

Switchable gas permeation membranes in which a photo-switchable low-molecular-weight liquid crystalline (LC) material acts as the active element, and a method of making such membranes. Different LC eutectic mixtures were doped with mesogenic azo dyes and infused into track-etched porous membranes with regular cylindrical pores. Photo-induced isothermal phase changes in the imbibed mesogenic material afforded large, reversible changes in the permeability of the photo-switchable membrane to nitrogen. For example, membranes imbibed with a photo-switchable cyanobiphenyl LC material demonstrated low permeability in the nematic state, while the photo-generated isotropic state demonstrated a 16.times.-greater sorption coefficient. Both states obey a high linear sorption behavior in accordance with Henry's Law. In contrast, membranes imbibed with a photo-switchable phenyl benzoate LC material showed the opposite permeability behavior to the biphenyl-imbibed membrane, along with nonlinear sorption behavior.

Marshall, Kenneth L; Glowacki, Eric

2013-05-07T23:59:59.000Z

209

High temperature ceramic membrane reactors for coal liquid upgrading  

SciTech Connect

Membrane reactors are today finding extensive applications for gas and vapor phase catalytic reactions (see discussion in the introduction and recent reviews by Armor [92], Hsieh [93] and Tsotsis et al. [941]). There have not been any published reports, however, of their use in high pressure and temperature liquid-phase applications. The idea to apply membrane reactor technology to coal liquid upgrading has resulted from a series of experimental investigations by our group of petroleum and coal asphaltene transport through model membranes. Coal liquids contain polycyclic aromatic compounds, which not only present potential difficulties in upgrading, storage and coprocessing, but are also bioactive. Direct coal liquefaction is perceived today as a two-stage process, which involves a first stage of thermal (or catalytic) dissolution of coal, followed by a second stage, in which the resulting products of the first stage are catalytically upgraded. Even in the presence of hydrogen, the oil products of the second stage are thought to equilibrate with the heavier (asphaltenic and preasphaltenic) components found in the feedstream. The possibility exists for this smaller molecular fraction to recondense with the unreacted heavy components and form even heavier undesirable components like char and coke. One way to diminish these regressive reactions is to selectively remove these smaller molecular weight fractions once they are formed and prior to recondensation. This can, at least in principle, be accomplished through the use of high temperature membrane reactors, using ceramic membranes which are permselective for the desired products of the coal liquid upgrading process. An additional incentive to do so is in order to eliminate the further hydrogenation and hydrocracking of liquid products to undesirable light gases.

Tsotsis, T.T. (University of Southern California, Los Angeles, CA (United States). Dept. of Chemical Engineering); Liu, P.K.T. (Aluminum Co. of America, Pittsburgh, PA (United States)); Webster, I.A. (Unocal Corp., Los Angeles, CA (United States))

1992-01-01T23:59:59.000Z

210

Hydrogen Selective Exfoliated Zeolite Membranes  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Selective Exfoliated Zeolite Hydrogen Selective Exfoliated Zeolite Membranes Background An important component of the Department of Energy (DOE) Carbon Sequestration Program is the development of carbon capture technologies for power systems. Capturing carbon dioxide (CO 2 ) from mixed-gas streams is a first and critical step in carbon sequestration. To be technically and economically viable, a successful separation method must be applicable to industrially relevant gas streams at realistic

211

Method of making membrane-electrode assemblies for electrochemical cells and assemblies made thereby  

DOE Patents (OSTI)

A method is described for making a combination, unitary, membrane and electrode assembly having a solid polymer electrolyte membrane, and first and second electrodes at least partially embedded in opposed surfaces of the membrane. The electrodes each comprise a respective group of finely divided carbon particles, very finely divided catalytic particles supported on internal and external surfaces of the carbon particles and a proton conductive material intermingled with the catalytic and carbon particles. A first group of finely divided carbon particles forming the first electrode has greater water attraction and retention properties, and is more hydrophilic than a second group of carbon particles forming the second electrode. In a preferred method, the membrane electrode assembly of the invention is prepared by forming a slurry of proton conductive material and at least one group of the carbon and catalyst particles. The slurry is applied to the opposed surfaces of the membrane and heated while being pressed to the membrane for a time and at a temperature and compressive load sufficient to embed at least a portion of the particles into the membrane. 10 figs.

Swathirajan, S.; Mikhail, Y.M.

1994-05-31T23:59:59.000Z

212

9 - Microporous silica membranes: fundamentals and applications in membrane reactors for hydrogen separation  

Science Journals Connector (OSTI)

Abstract: This chapter discusses the research and development of membrane reactors, incorporating microporous silica-based membranes, specifically for hydrogen production. Microporous silica membranes are first introduced alongside a discussion of relevant gas transport mechanisms, membrane performance parameters, membrane reactor designs and membrane reactor performance metrics. This is followed by an in-depth analysis of the various research investigations where silica membrane reactors have been used to produce hydrogen and/or syngas from hydrocarbon reforming reactions. Of particular importance here is the hydrothermal instability of silica-based membranes at the required operating temperatures and so the chapter closes by presenting the future research trends and industrial design challenges and considerations of silica-based membrane reactors.

S. Smart; J. Beltramini; J.C. Diniz da Costa; S.P. Katikaneni; T. Pham

2013-01-01T23:59:59.000Z

213

NFRC Procedures for Applied Films  

NLE Websites -- All DOE Office Websites (Extended Search)

Applied Films Applied Films Last update: 12/10/2013 07:29 PM NFRC now has a procedure for adding applied films to substrates in Optics5 and importing those applied film constructions into WINDOW5 to be used in a whole product calculation. The information presented below is provided to help simulators with this process. Feel free to contact us at WINDOWHelp@lbl.gov with questions or comments. NFRC Applied Film Procedure Applied Film Procedures (approved by NFRC) (PDF file) Approved Applied Film List (IGDB 33.0) (PDF file) NFRC Laminate Procedure Training Powerpoint with Examples (This Powerpoint presentation was used in the NFRC web based training sessions in December 2006 and January 2007) PowerPoint Presentation (PPT file) PowerPoint Presentation (PDF file) Help and Troubleshooting

214

Categorical Exclusion Determinations: Golden Field Office | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

27, 2012 27, 2012 CX-008982: Categorical Exclusion Determination "Sacrificial Protective Coating Materials Regenerated In-Situ to Enable High Performance Membranes CX(s) Applied: A9, B3.6 Date: 08/27/2012 Location(s): California Offices(s): Golden Field Office" August 23, 2012 CX-009018: Categorical Exclusion Determination State Energy Program - Tennessee CX(s) Applied: A9, A11 Date: 08/23/2012 Location(s): Tennessee Offices(s): Golden Field Office August 22, 2012 CX-009013: Categorical Exclusion Determination Fiscal Year 2012-13 State Energy Program Formula Grant CX(s) Applied: A9, A11 Date: 08/22/2012 Location(s): Pennsylvania Offices(s): Golden Field Office August 22, 2012 CX-008979: Categorical Exclusion Determination Flexible Assembly Solar Technology CX(s) Applied: A9, B3.6, B5.17

215

Categorical Exclusion Determinations: A9 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

27, 2012 27, 2012 CX-008982: Categorical Exclusion Determination "Sacrificial Protective Coating Materials Regenerated In-Situ to Enable High Performance Membranes CX(s) Applied: A9, B3.6 Date: 08/27/2012 Location(s): California Offices(s): Golden Field Office" August 24, 2012 CX-008921: Categorical Exclusion Determination West Virginia Super Circuit CX(s) Applied: A9 Date: 08/24/2012 Location(s): North Carolina Offices(s): National Energy Technology Laboratory August 24, 2012 CX-008920: Categorical Exclusion Determination West Virginia Super Circuit CX(s) Applied: A9 Date: 08/24/2012 Location(s): West Virginia Offices(s): National Energy Technology Laboratory August 23, 2012 CX-009018: Categorical Exclusion Determination State Energy Program - Tennessee CX(s) Applied: A9, A11

216

Strategies for Probing Nanometer-Scale Electrocatalysts: From Single Particles to Catalyst-Membrane Architectures  

SciTech Connect

The project primary objectives are to prepare and elucidate the promoting properties of materials that possess high activity for the conversion of hydrogen and related small molecules (water, oxygen, carbon monoxide and methanol) in polymer electrolyte fuel cells. One area of research has focused on the study of catalyst materials. Protocols were developed for probing the structure and benchmarking the activity of Pt and Pt bimetallic nanometer-scale catalyst against Pt single crystal electrode standards. A second area has targeted fuel cell membrane and the advancement of simple methods mainly based on vibrational spectroscopy that can be applied broadly in the study of membrane structure and transport properties. Infrared and Raman methods combined with least-squares data modeling were applied to investigate and assist the design of robust, proton conductive membranes, which resist reactant crossover.

Korzeniewski, Carol

2014-01-20T23:59:59.000Z

217

Influenza Virus-Membrane Fusion Triggered by Proton Uncaging for Single Particle Studies of Fusion Kinetics  

E-Print Network (OSTI)

and Engineering, Cornell University, Ithaca, New York, United States � School of Applied and Engineering Physics parameters obtained from the data are sensitive to the rate at which protons are delivered to the bound with the endosomal membrane to pass viral genetic material into the cytosol. For many enveloped viruses, a drop

Daniel, Susan

218

Instability of Pt/C Electrocatalysts in Proton Exchange Membrane Fuel Cells  

E-Print Network (OSTI)

catalysts. Catalyst durability during PEMFC operation remains a key challenge to developing PEMFCsInstability of Pt/C Electrocatalysts in Proton Exchange Membrane Fuel Cells A Mechanistic/C electrocatalyst sample in 0.5 M H2SO4 at 80°C were found to increase with applied potential from 0.9 to 1.1 V vs

Ferreira, Paulo J.

219

E-Print Network 3.0 - applying membrane-bound form Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

University of Sheffield Collection: Biology and Medicine 15 Abstract Amyloidogenic proteins (Ab peptide) in Alzheimer's disease (AD) and alpha-synuclein (a-Syn) Summary:...

220

membrane-ge | netl.doe.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

High-Performance Thin Film Composite Hollow Fiber Membranes for Post-Combustion Carbon Dioxide Capture Project No.: DE-FE0007514 GE Global Research is developing high...

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Triiodothyronine facilitates weaning from extracorporeal membrane...  

NLE Websites -- All DOE Office Websites (Extended Search)

substrate utilization. Abstract: Extracorporeal membrane oxygenation (ECMO) provides a bridge to recovery after myocardial injury in infants and children, yet morbidity and...

222

Tensile strain mapping in flat germanium membranes  

SciTech Connect

Scanning X-ray micro-diffraction has been used as a non-destructive probe of the local crystalline quality of a thin suspended germanium (Ge) membrane. A series of reciprocal space maps were obtained with ?4 ?m spatial resolution, from which detailed information on the strain distribution, thickness, and crystalline tilt of the membrane was obtained. We are able to detect a systematic strain variation across the membranes, but show that this is negligible in the context of using the membranes as platforms for further growth. In addition, we show evidence that the interface and surface quality is improved by suspending the Ge.

Rhead, S. D., E-mail: S.Rhead@warwick.ac.uk; Halpin, J. E.; Myronov, M.; Patchett, D. H.; Allred, P. S.; Wilson, N. R.; Leadley, D. R. [Department of Physics, University of Warwick, Coventry, CV4 7AL (United Kingdom); Shah, V. A. [Department of Physics, University of Warwick, Coventry, CV4 7AL (United Kingdom); Department of Engineering, University of Warwick, Coventry, CV4 7AL (United Kingdom); Kachkanov, V.; Dolbnya, I. P. [Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE (United Kingdom); Reparaz, J. S. [ICN2 - Institut Catala de Nanociencia i Nanotecnologia, Campus UAB, 08193 Bellaterra (Barcelona) (Spain); Sotomayor Torres, C. M. [ICN2 - Institut Catala de Nanociencia i Nanotecnologia, Campus UAB, 08193 Bellaterra (Barcelona) (Spain)

2014-04-28T23:59:59.000Z

223

Composite membranes and methods for making same  

DOE Patents (OSTI)

Composite membranes that are adapted for separation, purification, filtration, analysis, reaction and sensing. The composite membranes can include a porous support structure having elongate pore channels extending through the support structure. The composite membrane also includes an active layer comprising an active layer material, where the active layer material is completely disposed within the pore channels between the surfaces of the support structure. The active layer is intimately integrated within the support structure, thus enabling great robustness, reliability, resistance to mechanical stress and thermal cycling, and high selectivity. Methods for the fabrication of composite membranes are also provided.

Routkevitch, Dmitri; Polyakov, Oleg G

2012-07-03T23:59:59.000Z

224

Natural gas treatment process using PTMSP membrane  

DOE Patents (OSTI)

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

Toy, L.G.; Pinnau, I.

1996-03-26T23:59:59.000Z

225

Natural gas treatment process using PTMSP membrane  

DOE Patents (OSTI)

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

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

1996-01-01T23:59:59.000Z

226

Fluorous membrane-based separations and reactions.  

E-Print Network (OSTI)

??Porous alumina membranes were rendered compatible with fluorous liquids by surface modification with a carboxylic acid terminated perfluoropolyether (Krytox 157FSH). FTIR and contact angle measurements… (more)

Yang, Yanhong

2011-01-01T23:59:59.000Z

227

Cryogenic wavefront correction using membrane deformable mirrors  

Science Journals Connector (OSTI)

Micro-machined membrane deformable mirrors (MMDMs) are being evaluated for their suitability as wavefront correctors at cryogenic temperatures. Presented here are experimental...

Dyson, Harold; Sharples, Ray; Dipper, N; Vdovin, Gleb

2001-01-01T23:59:59.000Z

228

Durable, Low Cost, Improved Fuel Cell Membranes  

Energy.gov (U.S. Department of Energy (DOE))

This presentation, which focuses on fuel cell membranes, was given by Michel Foure of Arkema at a meeting on new fuel cell projects in February 2007.

229

Self-Assembly of Layered Membranes  

NLE Websites -- All DOE Office Websites (Extended Search)

| 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Self-Assembly of Layered Membranes October 27, 2014 Bookmark and Share Fig. 1. Schematic...

230

Measuring Physical Properties of Polymer Electrolyte Membranes  

Energy.gov (U.S. Department of Energy (DOE))

Presented by Cortney Mittelsteadt of Giner Electrochemical Systems, LLC, at the DOE High Temperature Membrane Working Group held September 14, 2006.

231

Hollow-Fiber Reverse Osmosis Membranes  

Science Journals Connector (OSTI)

Hollow-fiber membranes for reverse osmosis desalination are typically of the dense wall ... compact modules and further improve the economics of reverse osmosis desalination.

Mark E. Cohen; Michael A. Grable; Billy M. Riggleman

1972-01-01T23:59:59.000Z

232

Hybrid Membrane System for Industrial Water Reuse  

Energy.gov (U.S. Department of Energy (DOE))

Demonstrate an advanced water treatment and reuse process in a single hybrid system that combines forward osmosis with membrane distillation to achieve greater efficiency and increased water reuse.

233

High Temperature Membrane Working Group Meeting Minutes  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

membranes. He discussed the motivation for the work; electrochemistry and mechanical loads co-exist but are usually modeled separately. Additionally, there is a concern...

234

Alternate Fuel Cell Membranes for Energy Independence  

SciTech Connect

The overall objective of this project was the development and evaluation of novel hydrocarbon fuel cell (FC) membranes that possess high temperature performance and long term chemical/mechanical durability in proton exchange membrane (PEM) fuel cells (FC). The major research theme was synthesis of aromatic hydrocarbon polymers of the poly(arylene ether sulfone) (PAES) type containing sulfonic acid groups tethered to the backbone via perfluorinated alkylene linkages and in some cases also directly attached to the phenylene groups along the backbone. Other research themes were the use of nitrogen-based heterocyclics instead of acid groups for proton conduction, which provides high temperature, low relative humidity membranes with high mechanical/thermal/chemical stability and pendant moieties that exhibit high proton conductivities in the absence of water, and synthesis of block copolymers consisting of a proton conducting block coupled to poly(perfluorinated propylene oxide) (PFPO) blocks. Accomplishments of the project were as follows: 1) establishment of a vertically integrated program of synthesis, characterization, and evaluation of FC membranes, 2) establishment of benchmark membrane performance data based on Nafion for comparison to experimental membrane performance, 3) development of a new perfluoroalkyl sulfonate monomer, N,N-diisopropylethylammonium 2,2-bis(p-hydroxyphenyl) pentafluoropropanesulfonate (HPPS), 4) synthesis of random and block copolymer membranes from HPPS, 5) synthesis of block copolymer membranes containing high-acid-concentration hydrophilic blocks consisting of HPPS and 3,3'-disulfonate-4,4'-dichlorodiphenylsulfone (sDCDPS), 6) development of synthetic routes to aromatic polymer backbones containing pendent 1H-1,2,3-triazole moieties, 7) development of coupling strategies to create phase-separated block copolymers between hydrophilic sulfonated prepolymers and commodity polymers such as PFPO, 8) establishment of basic performance properties of experimental membranes, 9) fabrication and FC performance testing of membrane electrode assemblies (MEA) from experimental membranes, and 10) measurement of ex situ and in situ membrane durability of experimental membranes. Although none of the experimental hydrocarbon membranes that issued from the project displayed proton conductivities that met DOE requirements, the project contributed to our basic understanding of membrane structure-property relationships in a number of key respects. An important finding of the benchmark studies is that physical degradation associated with humidity and temperature variations in the FC tend to open new fuel crossover pathways and act synergistically with chemical degradation to accelerate overall membrane degradation. Thus, for long term membrane survival and efficient fuel utilization, membranes must withstand internal stresses due to humidity and temperature changes. In this respect, rigid aromatic hydrocarbon fuel cell membranes, e.g. PAES, offer an advantage over un-modified Nafion membranes. The benchmark studies also showed that broadband dielectric spectroscopy is a potentially powerful tool in assessing shifts in the fundamental macromolecular dynamics caused by Nafion chemical degradation, and thus, this technique is of relevance in interrogating proton exchange membrane durability in fuel cells and macromolecular dynamics as coupled to proton migration, which is of fundamental relevance in proton exchange membranes in fuel cells. A key finding from the hydrocarbon membrane synthesis effort was that rigid aromatic polymers containing isolated ion exchange groups tethered tightly to the backbone (short tether), such as HPPS, provide excellent mechanical and durability properties but do not provide sufficient conductivity, in either random or block configuration, when used as the sole ion exchange monomer. However, we continue to hypothesize that longer tethers, and tethered groups spaced more closely within the hydrophilic chain elements of the polymer, will yield highly conductive materials with excellent mech

Storey, Robson, F.; Mauritz, Kenneth, A.; Patton, Derek, L.; Savin, Daniel, A.

2012-12-18T23:59:59.000Z

235

Journal of Membrane Science 257 (2005) 8598 Membrane contactor processes for wastewater reclamation in space  

E-Print Network (OSTI)

Journal of Membrane Science 257 (2005) 85­98 Membrane contactor processes for wastewater membrane processes for reclamation and reuse of wastewater in future space missions was evaluated and used in estimating the specific energy cost of treating the wastewater generated in space. The weight

236

Journal of Membrane Science 257 (2005) 111119 Membrane contactor processes for wastewater reclamation in space  

E-Print Network (OSTI)

Journal of Membrane Science 257 (2005) 111­119 Membrane contactor processes for wastewater for treatment of metabolic wastewater Tzahi Y. Cath, Dean Adams, Amy E. Childress University of Nevada of an innovative dual membrane contactor process for treatment of combined hygiene and metabolic wastewater

237

Journal of Applied Ecology 2004  

E-Print Network (OSTI)

Journal of Applied Ecology 2004 41, 922­933 © 2004 British Ecological Society Blackwell Publishing that might guide management decisions. We tested whether ideas from landscape ecology (local vs. landscape-scale, Sacramento River, succession, vegetation Journal of Applied Ecology (2004) 41, 922­933 Introduction More than

Holl, Karen

238

Membranes for corrosive oxidations. Final CRADA report.  

SciTech Connect

The objective of this project is to develop porous hydrophilic membranes that are highly resistant to oxidative and corrosive conditions and to deploy them for recovery and purification of high tonnage chemicals such as hydrogen peroxide and other oxychemicals. The research team patented a process for membrane-based separation of hydrogen peroxide (US Patent No. 5,662,878). The process is based on using a hydrophilic membrane to separate hydrogen peroxide from the organic working solution. To enable this process, a new method for producing hydrophilic membrane materials (Patent No.6,464,880) was reported. We investigated methods of producing these hydrophilic materials and evaluated separations performance in comparison to membrane stability. It was determined that at the required membrane flux, membrane stability was not sufficient to design a commercial process. This work was published (Hestekin et al., J. Membrane Science 2006). To meet the performance needs of the process, we developed a membrane contactor method to extract the hydrogen peroxide, then we surveyed several commercial and pre-commercial membrane materials. We identified pre-commercial hydrophilic membranes with the required selectivity, flux, and stability to meet the needs of the process. In addition, we invented a novel reaction/separations format that greatly increases the performance of the process. To test the performance of the membranes and the new formats we procured and integrated reactor/membrane separations unit that enables controlled mixing, flow, temperature control, pressure control, and sampling. The results were used to file a US non-provisional patent application (ANL-INV 03-12). Hydrogen peroxide is widely used in pulp and paper applications, environmental treatment, and other industries. Virtually all hydrogen peroxide production is now based on a process featuring catalytic hydrogenation followed by auto-oxidation of suitable organic carrier molecules. This process has several drawbacks, particularly in the extraction phase. One general disadvantage of this technology is that hydrogen peroxide must be produced at large centralized plants where it is concentrated to 70% by distillation and transported to the users plant sites where it is diluted before use. Advanced membranes have the potential to enable more efficient, economic, and safe manufacture of hydrogen peroxide. Advanced membrane technology would allow filtration-based separation to replace the difficult liquid-liquid extraction based separation step of the hydrogen peroxide process. This would make it possible for hydrogen peroxide to be produced on-site in mini-plants at 30% concentration and used at the same plant location without distillation and transportation. As a result, production could become more cost-effective, safe and energy efficient.

Snyder, S. W.; Energy Systems

2010-02-01T23:59:59.000Z

239

Dye-sensitized solar cells based on electrospun polyacrylonitrile (PAN) nanofibre membrane gel electrolyte  

Science Journals Connector (OSTI)

Abstract Dye Sensitized Solar Cells (DSSCs) based on electrospun nanofibre membrane electrolytes offer several advantages over liquid electrolyte based solar cells. Nanofibre membranes having different thicknesses were prepared by electrospinning on platinum electrodes from a 11 wt% solution of polyacrylonitrile (PAN) in N,N-dimethylformamide (DMF) at an applied voltage of 8 kV. The membranes were then activated by immersing in a solution containing potassium iodide (KI) (0.06 g), propylene carbonate (PC) (0.8 g) and iodine (I2) (0.0092 g) for 30 minutes to obtain “gel” type membrane electrolytes with different thicknesses. These nanofibre membrane electrolytes were used to fabricate quasi-solid state (gel) \\{DSSCs\\} and the performance of these solar cells were compared with \\{DSSCs\\} fabricated with liquid electrolyte (KI:PC:I2) and conventional PAN based gel electrolyte (PAN:KI:PC:I2). DSSC with nanofibre membrane electrolyte of thickness 9.14 ?m showed the highest light-to-electricity conversion efficiency of 5.2% whereas an identical cell based on corresponding liquid electrolyte showed an efficiency of 5.3%. The open circuit voltage (VOC), short circuit current density (JSc) and fill factor for the solar cell based on this electrolyte was 0.67 V, 13.31 mA cm?2 and 59% respectively at an incident light intensity of 1000 W m?2 with a 1.5 AM filter.

M.A.K.L. Dissanayake; H.K.D.W.M.N.R. Divarathne; C.A. Thotawatthage; C.B. Dissanayake; G.K.R. Senadeera; B.M.R. Bandara

2014-01-01T23:59:59.000Z

240

Ceramic membrane treatment of petrochemical wastewater  

SciTech Connect

Ceramic alumina microfiltration membranes were evaluated for treatment of 3 aqueous streams containing heavy metals, oils, and solids at petrochemical manufacturing facilities. To the best of the author's knowledge, this is the first reported use of ceramic alumina membranes for process water and wastewater treatment in a US petrochemical plant. In a pilot test at a vinyl chloride monomer (VCM) plant, precipitated heavy metal solids were filtered with the membranes. On another stream at that site, the ceramic membrane pilot system successfully treated emulsions of 1,2-dichloroethane (EDC), water, and solids. Membrane filtration of a linear alkyl benzene (LAB) oily wastewater stream produced water with less than 5 ppmw oil and grease, after pretreatment with HCl and ferric chloride. A preliminary financial analysis shows that the installed system cost for a ceramic membrane unit is comparable to other membrane technologies, while operating costs are anticipated to be lower. Specific process conditions that are particularly amenable to treatment by ceramic membrane microfiltration are also given in the paper. 10 refs., 11 figs., 7 tabs.

Lahiere, R.J. (Vista Chemical Co., Houston, TX (United States)); Goodboy, K.P.

1993-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
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241

IONICALLY CONDUCTING MEMBRANES FOR HYDROGEN PRODUCTION AND  

E-Print Network (OSTI)

operating experience. #12;ELTRON RESEARCH INC. Syngas Production Rate ­ 60 mL/min cm2 @ 900°C Equivalent O2IONICALLY CONDUCTING MEMBRANES FOR HYDROGEN PRODUCTION AND SEPARATION Presented by Tony Sammells for Hydrogen Production ­ Compositions ­ Feedstocks ­ Performance ­ Key Technical Hurdles · Membranes

242

The Low Polarity of Many Membrane Proteins  

Science Journals Connector (OSTI)

...buried in the hydrophobic interior of the membrane. from their Thus, the polarity index appears to be a useful parameter for edia. the characterization of membrane proteins. 45.6 46.1 48.1 48.3 50.0 52.0 37 38 12 39 27 27 This work was supported...

Roderick A. Capaldi; Garret Vanderkooi

1972-01-01T23:59:59.000Z

243

Catalyst containing oxygen transport membrane  

SciTech Connect

A composite oxygen transport membrane having a dense layer, a porous support layer and an intermediate porous layer located between the dense layer and the porous support layer. Both the dense layer and the intermediate porous layer are formed from an ionic conductive material to conduct oxygen ions and an electrically conductive material to conduct electrons. The porous support layer has a high permeability, high porosity, and a high average pore diameter and the intermediate porous layer has a lower permeability and lower pore diameter than the porous support layer. Catalyst particles selected to promote oxidation of a combustible substance are located in the intermediate porous layer and in the porous support adjacent to the intermediate porous layer. The catalyst particles can be formed by wicking a solution of catalyst precursors through the porous support toward the intermediate porous layer.

Christie, Gervase Maxwell; Wilson, Jamie Robyn; van Hassel, Bart Antonie

2012-12-04T23:59:59.000Z

244

NETL: Novel Inorganic/Polymer Composite Membranes  

NLE Websites -- All DOE Office Websites (Extended Search)

Novel Inorganic/Polymer Composite Membranes Novel Inorganic/Polymer Composite Membranes Project No.: DE-FE0007632 Ohio State University is developing a cost-effective design and manufacturing process for new membrane modules that capture carbon dioxide (CO2) from flue gas. The membranes consist of a thin, selective inorganic layer, embedded in a polymer structure so that it can be made in a continuous manufacturing process. They will be incorporated in spiral-wound modules for bench-scale tests using coal-fired flue gas. Preliminary cost calculations show that a single-stage membrane process is economically unfavorable, primarily because of the low concentration of CO2 (~14 percent) in the flue gas stream. A two-stage process is more economical, but requires plant operation with a CO2-enriched recycle stream.

245

Proton conducting ceramic membranes for hydrogen separation  

DOE Patents (OSTI)

A multi-phase proton conducting material comprising a proton-conducting ceramic phase and a stabilizing ceramic phase. Under the presence of a partial pressure gradient of hydrogen across the membrane or under the influence of an electrical potential, a membrane fabricated with this material selectively transports hydrogen ions through the proton conducting phase, which results in ultrahigh purity hydrogen permeation through the membrane. The stabilizing ceramic phase may be substantially structurally and chemically identical to at least one product of a reaction between the proton conducting phase and at least one expected gas under operating conditions of a membrane fabricated using the material. In a barium cerate-based proton conducting membrane, one stabilizing phase is ceria.

Elangovan, S. (South Jordan, UT); Nair, Balakrishnan G. (Sandy, UT); Small, Troy (Midvale, UT); Heck, Brian (Salt Lake City, UT)

2011-09-06T23:59:59.000Z

246

Fuel cell subassemblies incorporating subgasketed thrifted membranes  

DOE Patents (OSTI)

A fuel cell roll good subassembly is described that includes a plurality of individual electrolyte membranes. One or more first subgaskets are attached to the individual electrolyte membranes. Each of the first subgaskets has at least one aperture and the first subgaskets are arranged so the center regions of the individual electrolyte membranes are exposed through the apertures of the first subgaskets. A second subgasket comprises a web having a plurality of apertures. The second subgasket web is attached to the one or more first subgaskets so the center regions of the individual electrolyte membranes are exposed through the apertures of the second subgasket web. The second subgasket web may have little or no adhesive on the subgasket surface facing the electrolyte membrane.

Iverson, Eric J; Pierpont, Daniel M; Yandrasits, Michael A; Hamrock, Steven J; Obradovich, Stephan J; Peterson, Donald G

2014-01-28T23:59:59.000Z

247

Liners for ion transport membrane systems  

SciTech Connect

Ion transport membrane system comprising (a) a pressure vessel comprising an interior, an exterior, an inlet, an inlet conduit, an outlet, and an outlet conduit; (b) a plurality of planar ion transport membrane modules disposed in the interior of the pressure vessel and arranged in series, each membrane module comprising mixed metal oxide ceramic material and having an interior region and an exterior region, wherein the inlet and the outlet of the pressure vessel are in flow communication with exterior regions of the membrane modules; (c) a gas manifold having an interior surface wherein the gas manifold is in flow communication with the interior region of each of the planar ion transport membrane modules and with the exterior of the pressure vessel; and (d) a liner disposed within any of the inlet conduit, the outlet conduit, and the interior surface of the gas manifold.

Carolan, Michael Francis (Allentown, PA); Miller, Christopher Francis (Macungie, PA)

2010-08-10T23:59:59.000Z

248

Immobilized fluid membranes for gas separation  

DOE Patents (OSTI)

Provided herein are immobilized liquid membranes for gas separation, methods of preparing such membranes and uses thereof. In one example, the immobilized membrane includes a porous metallic host matrix and an immobilized liquid fluid (such as a silicone oil) that is immobilized within one or more pores included within the porous metallic host matrix. The immobilized liquid membrane is capable of selective permeation of one type of molecule (such as oxygen) over another type of molecule (such as water). In some examples, the selective membrane is incorporated into a device to supply oxygen from ambient air to the device for electrochemical reactions, and at the same time, to block water penetration and electrolyte loss from the device.

Liu, Wei; Canfield, Nathan L; Zhang, Jian; Li, Xiaohong Shari; Zhang, Jiguang

2014-03-18T23:59:59.000Z

249

CF4 plasma surface modification of asymmetric hydrophilic polyethersulfone membranes for direct contact membrane distillation  

Science Journals Connector (OSTI)

This paper describes the use of CF4 plasma modification of a hydrophilic membrane into a hydrophobic one for membrane distillation. Plasma surface modification conditions were optimized with respect to plasma glow discharge power and treatment duration using a flat sheet PES membrane. The modified membranes were characterized by X-ray photoelectron spectroscopy (XPS), SEM, contact angle measurements, pore size distribution, liquid entry pressure and atomic force microscopy. Results revealed that the plasma modification converted hydrophilic membranes of a contact angle 0° into hydrophobic ones with water contact angle above 120°. Fluorination was ascribed to the wettability change of the membrane from hydrophilic to hydrophobic via insertion and possibly deposition. Direct contact membrane distillation of the hollow fibers using 4% NaCl solution yielded a water flux of 45.4 kg/m2 h at a feed temperature of 63.3 °C. A rather high evaporation efficiency of the membrane distillation process was estimated in comparison with literature results. Direct contact membrane distillation (DCMD) stability test showed a water flux of 42.1 kg/m2 h using 4 wt% NaCl as feed (at the temperature of 60.5 ± 0.2 °C). No leakage was observed for 54 h indicating a stable membrane performance. The high evaporation efficiency and water flux were ascribed most probably to the high porosity of the base membrane.

Xing Wei; Baolong Zhao; Xue-Mei Li; Zhouwei Wang; Ben-Qiao He; Tao He; Biao Jiang

2012-01-01T23:59:59.000Z

250

The role of transmembrane domains in membrane fusion  

Science Journals Connector (OSTI)

Biological membrane fusion is driven by different types of molecular fusion machines. Most of these proteins are membrane ... . SNARE proteins are essential for intracellular membrane fusion along the secretory a...

D. Langosch; M. Hofmann; C. Ungermann

2007-04-01T23:59:59.000Z

251

membrane-process2 | netl.doe.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Membrane Process to Capture CO2 from Power Plant Flue Gas Project No.: DE-NT0005312 MTR membrane test skid. (click on image to enlarge) Membrane Technology and Research (MTR) Inc....

252

Improved filtration membranes through self-organizing amphiphilic comb copolymers  

E-Print Network (OSTI)

The operating cost of a membrane filtration system is generally determined by two major factors: the permeability of the membrane to water, and the lifetime of the membrane. Both of these are strongly affected by the ...

Asatekin Alexiou, Ayse

2009-01-01T23:59:59.000Z

253

Applied Sedimentology | Open Energy Information  

Open Energy Info (EERE)

Sedimentology Jump to: navigation, search OpenEI Reference LibraryAdd to library Book: Applied Sedimentology Author R.C. Salley Published Academic Press, 2000 DOI Not Provided...

254

temperature heat pumps applied to  

E-Print Network (OSTI)

Very high- temperature heat pumps applied to energy efficiency in industry Application June 21th 2012 Energy efficiency : A contribution to environmental protection Kyoto Copenhage Emission, plastics Partnership : EDF R&D Bil

Oak Ridge National Laboratory

255

IIT SCHOOL OF APPLIED TECHNOLOGY  

E-Print Network (OSTI)

INDUSTRIAL TECHNOLOGY AND MANAGEMENT IIT SCHOOL OF APPLIED TECHNOLOGY PREPARING SKILLED INDIVIDUALS, INDUSTRIAL FACILITIES, SUPPLY CHAIN MANAGEMENT, SUSTAINABILITY AND MANUFACTURING TECHNOLOGY. #12;BE ONE to assess, implement, and utilize current technologies, and to learn how to manage industrial operations

Heller, Barbara

256

Advanced, Energy-Efficient Hybrid Membrane System for Industrial...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Advanced, Energy-Efficient Hybrid Membrane System for Industrial Water Reuse Advanced, Energy-Efficient Hybrid Membrane System for Industrial Water Reuse hybridmembranesystemsfa...

257

High Temperature Polymer Membrane Development at Argonne National...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Polymer Membrane Development at Argonne National Laboratory High Temperature Polymer Membrane Development at Argonne National Laboratory Summary of ANL's high temperature polymer...

258

Membranes and MEAs for Dry Hot Operating Conditions  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

of this collaborative effort are to develop new proton exchange membranes (PEM's) for fuel cells, integrate them into membrane electrode assemblies (MEA's), and demonstrate in...

259

Folding amphipathic helices into membranes: Amphiphilicity trumps hydrophobicity  

E-Print Network (OSTI)

C. (1999). Membrane protein folding and stability: PhysicalA. S. & Hristova, K. (1998). Protein folding in membranes:Mutational analysis of protein folding and stability. In

Fernández-Vidal, Mónica; Jayasinghe, Sajith; Ladokhin, Alexey S; White, Stephen H

2007-01-01T23:59:59.000Z

260

Advanced, Energy-Efficient Hybrid Membrane System for Industrial...  

Energy Savers (EERE)

MANUFACTURING OFFICE Advanced, Energy- Efficient Hybrid Membrane System for Industrial Water Reuse New Hybrid Membrane System Utilizes Industrial Waste Heat to Power Water...

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

New Membrane Technology Boosts Efficiency in Industrial Gas Processes  

Office of Energy Efficiency and Renewable Energy (EERE)

Fact sheet from Membrane Technology and Research, Inc. about its pilot-scale industrial membrane system that was funded by the SBIR program.

262

Graphene as the Ultimate Membrane for Gas Separation Project...  

NLE Websites -- All DOE Office Websites (Extended Search)

Graphene as the Ultimate Membrane for Gas Separation Graphene as the Ultimate Membrane for Gas Separation GraphenePore.jpg Key Challenges: Investigate the permeability and...

263

Polyvinylidene Fluoride-Based Membranes for Direct Methanol Fuel...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Polyvinylidene Fluoride-Based Membranes for Direct Methanol Fuel Cell Applications Polyvinylidene Fluoride-Based Membranes for Direct Methanol Fuel Cell Applications Presentation...

264

High temperature membranes for DMFC (and PEFC) applications  

Energy.gov (U.S. Department of Energy (DOE))

Presentation on High temperature membranes for DMFCs (and PEFCs) to the High Temperature Membrane Working Group, May 25, 2004 in Philadelphia, PA.

265

Model Compound Studies of Fuel Cell Membrane Degradation  

Energy.gov (U.S. Department of Energy (DOE))

Presentation on Model Compound Studies of Fuel Cell Membrane Degradation to the High Temperature Membrane Working Group Meeting held in Arlington, Virginia, May 26,2005.

266

membrane-fuelcell-energy | netl.doe.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

a novel system concept for the separation of carbon dioxide (CO2) from greenhouse gas (GHG) emission sources using an electrochemical membrane. The proposed membrane has its...

267

Development of Advanced High Temperature Fuel Cell Membranes  

Energy.gov (U.S. Department of Energy (DOE))

Presentation on Development of Advanced High Temperature Fuel Cell Membranes to the High Temperature Membrane Working Group Meeting held in Arlington, Virginia, May 26,2005.

268

A Discussion of Conductivity Testing in High Temperature Membranes...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

A Discussion of Conductivity Testing in High Temperature Membranes (lessons learned in assessing transport) A Discussion of Conductivity Testing in High Temperature Membranes...

269

Solid Oxide Membrane (SOM) Electrolysis of Magnesium: Scale-Up...  

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

Solid Oxide Membrane (SOM) Electrolysis of Magnesium: Scale-Up Research and Engineering for Light-Weight Vehicles Solid Oxide Membrane (SOM) Electrolysis of Magnesium: Scale-Up...

270

High Temperature Polymer Membrane Development at Argonne National Laboratory  

Energy.gov (U.S. Department of Energy (DOE))

Summary of ANL’s high temperature polymer membrane work presented to the High Temperature Membrane Working Group Meeting, Orlando FL, October 17, 2003

271

Advanced Water Removal via Membrane Solvent Extraction | Department...  

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

Water Removal via Membrane Solvent Extraction Advanced Water Removal via Membrane Solvent Extraction advwaterremovalmse.pdf More Documents & Publications Advance Patent Waiver...

272

Alternate Fuel Cell Membranes at the University of Southern Mississipp...  

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

Alternate Fuel Cell Membranes at the University of Southern Mississippi Alternate Fuel Cell Membranes at the University of Southern Mississippi April 16, 2013 - 12:00am Addthis...

273

Membrane separation processes for clean production  

SciTech Connect

Clean production can be considered as a strategic element in manufacturing technology for present and future products in the chemical industry. Demand is focused on the development of cost-effective technologies, the optimization of processes including separation steps, alternative processes for the reduction of waste, optimization of the use of resources and improvements in production efficiency. In many cases an environmentally friendly alternative to conventional separation processes could be membrane separation. Membrane separation techniques are suitable for mixtures of liquids, gases and vapors. Some examples of successful applications in the areas of waste water treatment and vapor recovery are given. Demands, advantages and problems of separation with membranes are also discussed.

Paul, D.; Ohlrogge, K. [GKSS Research Center, Geesthacht (Germany)

1998-12-31T23:59:59.000Z

274

A PDMS membrane microvalve with one-dimensional line valve seat for robust microfluidics  

Science Journals Connector (OSTI)

We have developed a monolithic polydimethylsiloxane (PDMS) membrane microvalve with an isotropically etched valve seat for robust microfluidics. In order to avoid bonding or sticking of the PDMS membrane to the valve seat during the bonding process, the valve seat was wet-etched to be a one-dimensional line instead of a plane. The simple wet-etching technique allowed for the fabrication of an anti-bonding architecture in a scalable manner, and it intrinsically prevented contact between the PDMS membrane and valve seat when no external force was applied (i.e., normally open). This approach enables the permanent device assembly so that the microfluidic chip can be operable in a wide range of fluid pressures (e.g., over 200 kPa) without any leakage and sticking problems.

Chin-Sung Park; Kyu-Youn Hwang; Wonjong Jung; Kak Namkoong; Wonseok Chung; Joon-Ho Kim; Nam Huh

2014-01-01T23:59:59.000Z

275

BNL | Accelerators for Applied Research  

NLE Websites -- All DOE Office Websites (Extended Search)

Accelerators for Applied Research Accelerators for Applied Research Brookhaven National Lab operates several accelerator facilities dedicated to applied research. These facilities directly address questions and concerns on a tremendous range of fields, including medical imaging, cancer therapy, computation, and space exploration. Leading scientists lend their expertise to these accelerators and offer crucial assistant to collaborating researchers, pushing the limits of science and technology. Interested in gaining access to these facilities for research? See the contact number listed for each facility. RHIC tunnel Brookhaven Linac Isotope Producer The Brookhaven Linac Isoptope Producer (BLIP)-positioned at the forefront of research into radioisotopes used in cancer treatment and diagnosis-produces commercially unavailable radioisotopes for use by the

276

Anisotropic membranes for gas separation  

DOE Patents (OSTI)

A gas separation membrane has a dense separating layer about 10,000 Angstroms or less thick and a porous support layer 10 to 400 microns thick that is an integral unit with gradually and continuously decreasing pore size from the base of the support layer to the surface of the thin separating layer and is made from a casting solution comprising ethyl cellulose and ethyl cellulose-based blends, typically greater than 47.5 ethoxyl content ethyl cellulose blended with compatible second polymers, such as nitrocellulose. The polymer content of the casting solution is from about 10% to about 35% by weight of the total solution with up to about 50% of this polymer weight a compatible second polymer to the ethyl cellulose in a volatile solvent such as isopropanol, methylacetate, methanol, ethanol, and acetone. Typical nonsolvents for the casting solutions include water and formamide. The casting solution is cast in air from about zero to 10 seconds to allow the volatile solvent to evaporate and then quenched in a coagulation bath, typically water, at a temperature of 7--25 C and then air dried at ambient temperature, typically 10--30 C. 2 figs.

Gollan, A.Z.

1987-07-21T23:59:59.000Z

277

Anisotropic membranes for gas separation  

DOE Patents (OSTI)

A gas separation membrane has a dense separating layer about 10,000 Angstroms or less thick and a porous support layer 10 to 400 microns thick that is an integral unit with gradually and continuously decreasing pore size from the base of the support layer to the surface of the thin separating layer and is made from a casting solution comprising ethyl cellulose and ethyl cellulose-based blends, typically greater than 47.5 ethoxyl content ethyl cellulose blended with compatible second polymers, such as nitrocellulose. The polymer content of the casting solution is from about 10% to about 35% by weight of the total solution with up to about 50% of this polymer weight a compatible second polymer to the ethyl cellulose in a volatile solvent such as isopropanol, methylacetate, methanol, ethanol, and acetone. Typical nonsolvents for the casting solutions include water and formamide. The casting solution is cast in air from about zero to 10 seconds to allow the volatile solvent to evaporate and then quenched in a coagulation bath, typically water, at a temperature of 7.degree.-25.degree. C. and then air dried at ambient temperature, typically 10.degree.-30.degree. C.

Gollan, Arye Z. (Newton, MA)

1987-01-01T23:59:59.000Z

278

Carbon Nanotube Membranes: Carbon Nanotube Membranes for Energy-Efficient Carbon Sequestration  

SciTech Connect

Broad Funding Opportunity Announcement Project: Porifera is developing carbon nanotube membranes that allow more efficient removal of CO2 from coal plant exhaust. Most of today’s carbon capture methods use chemical solvents, but capture methods that use membranes to draw CO2 out of exhaust gas are potentially more efficient and cost effective. Traditionally, membranes are limited by the rate at which they allow gas to flow through them and the amount of CO2 they can attract from the gas. Smooth support pores and the unique structure of Porifera’s carbon nanotube membranes allows them to be more permeable than other polymeric membranes, yet still selective enough for CO2 removal. This approach could overcome the barriers facing membrane-based approaches for capturing CO2 from coal plant exhausts.

None

2010-03-01T23:59:59.000Z

279

Application of Oak Ridge Inorganic Membrane  

NLE Websites -- All DOE Office Websites (Extended Search)

Oak Ridge Inorganic Membrane Oak Ridge Inorganic Membrane Technology to Cat Cracker Recycle Gas Hydrogen* FINAL REPORT DOE FEW FEAC324 June 2003 L.D. Trowbridge *AKA: Application of Inorganic Membrane Technology to Hydrogen-Hydrocarbon Separations ORNL/TM-2003/139 Application of Inorganic Membrane Technology To Hydrogen-hydrocarbon Separations June 2003 Prepared by L. D. Trowbridge DOCUMENT AVAILABILITY Reports produced after January 1, 1996, are generally available free via the U.S. Department of Energy (DOE) Information Bridge: Web site: http://www.osti.gov/bridge Reports produced before January 1, 1996, may be purchased by members of the public from the following source: National Technical Information Service 5285 Port Royal Road Springfield, VA 22161 Telephone: 703-605-6000 (1-800-553-6847)

280

Table II: Technical Targets for Membranes: Automotive  

NLE Websites -- All DOE Office Websites (Extended Search)

II: Technical Targets for Membranes: Automotive II: Technical Targets for Membranes: Automotive All targets must be achieved simultaneously Characteristics Units Calendar year 2000 status a 2005 2010 Membrane conductivity, operating temperature Ω-cm -1 0.1 0.1 0.1 Room temperature Ω-cm -1 -20 o C Ω-cm -1 Oxygen cross-over b mA/cm 2 5 5 2 Hydrogen cross-over b mA/cm 2 5 5 2 Cost $/kW 50 5 Operating Temperature o C 80 120 120 Durability Hours 1000 d >4000 e >5000 f Survivability c o C -20 -30 -40 Thermal cyclability in presence of condensed water yes yes yes Notes: a) Status is present day 80 o C unless otherwise noted; targets are for new membranes/CCMs b) Tested in CCM c) Indicates temperature from which bootstrapping stack must be achieved

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

IFITM Proteins Restrict Viral Membrane Hemifusion  

E-Print Network (OSTI)

an intermediate of fusion, referred to as a cold arrestedcold arrested state (CAS), PLOS Pathogens | www.plospathogens.org January 2013 | Volume 9 | Issue 1 | e1003124 Restriction of Viral Membrane Fusion

2013-01-01T23:59:59.000Z

282

Optical rheology for live cell membranes  

E-Print Network (OSTI)

We present a novel optical methodology including both instrumentation and theory aimed at retrieving the full viscoelastic information of cell membrane material properties. Red blood cells (RBC) are chosen for this study ...

Park, YongKeun, S.M. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

283

Membrane and MEA Accelerated Stress Test Protocols  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and MEA Accelerated Stress Test Protocols Presented at High Temperature Membrane Working Group Meeting Washington, DC May 14, 2007 T.G. Benjamin Argonne National Laboratory 2 0 10...

284

New Membranes for PEM Fuel Cells  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Membranes for PEM Fuel Cells Steve Hamrock 3M Fuel Cell Components Program 3M Center 201-1W-28 St Paul MN 55144 USA HTMWG Meeting 52705 This research was supported in part by the...

285

Aging and weathering of cool roofing membranes  

E-Print Network (OSTI)

Canada ABSTRACT Aging and weathering can reduce the solarsolar reflectance of 25 weathered roofing membranes from 25 cities across the United States and Canada.Canada. The LBNL study included measuring the spectral solar

2005-01-01T23:59:59.000Z

286

Membrane permeation process for dehydration of organic liquid mixtures using sulfonated ion-exchange polyalkene membranes  

DOE Patents (OSTI)

A membrane permeation process for dehydrating a mixture of organic liquids, such as alcohols or close boiling, heat sensitive mixtures. The process comprises causing a component of the mixture to selectively sorb into one side of sulfonated ion-exchange polyalkene (e.g., polyethylene) membranes and selectively diffuse or flow therethrough, and then desorbing the component into a gas or liquid phase on the other side of the membranes.

Cabasso, Israel (131 Buckingham Ave., Syracuse, NY 13210); Korngold, Emmanuel (P.O. Box 1025, Beer-Sheva 84110, IL)

1988-01-01T23:59:59.000Z

287

Categorical Exclusion Determinations: B3.6 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

0, 2010 0, 2010 CX-003877: Categorical Exclusion Determination Hybrid Membrane/Absorption Process for Post-Combustion Carbon Dioxide Capture CX(s) Applied: B3.6 Date: 09/10/2010 Location(s): Des Plaines, Illinois Office(s): Fossil Energy, National Energy Technology Laboratory September 10, 2010 CX-003876: Categorical Exclusion Determination Hybrid Membrane/Absorption Process for Post-Combustion Carbon Dioxide Capture CX(s) Applied: B3.6 Date: 09/10/2010 Location(s): Woburn, Massachusetts Office(s): Fossil Energy, National Energy Technology Laboratory September 10, 2010 CX-003839: Categorical Exclusion Determination Energy Efficient Innovations for Healthy Buildings CX(s) Applied: A1, A9, A11, B2.1, B3.1, B3.6, B5.1 Date: 09/10/2010 Location(s): Syracuse, New York Office(s): Energy Efficiency and Renewable Energy, National Energy

288

Separation of NF3 and CF4 using amorphous glassy perfluoropolymer Teflon AF and Hyflon AD60 membranes  

Science Journals Connector (OSTI)

Abstract In this study, the pure and mixed gas permeabilities of Teflon AF2400, Teflon AF1600 and Hyflon AD60 membranes towards NF3 and CF4 were measured to determine whether membrane gas separation can be applied to purify NF3 of CF4. In accordance with literature results, it was shown that thermal annealing of the solution cast films was necessary to reach optimum performance, wherein all membranes studied had a preferential permeation of NF3 rather than CF4. The Teflon AF and Hyflon AD60 membranes displayed rather high pure and mixed gas selectivities (?(NF3/CF4)) considering the high free volume of the polymers. Furthermore, the ?(NF3/CF4) increased with increasing diffusion selectivity of the glassy perfluoropolymers, of which the pure gas He/N2 ideal selectivities gave an indication, and which is related to the fractional free volume (FFV). As a result, Hyflon AD60 displayed the highest NF3/CF4 pure and mixed gas selectivity of just above 12, albeit with a rather low NF3 permeability of ca. 1.9 Barrer. Although the membranes were sufficiently inert towards penetrant induced swelling, a Hyflon AD60 membrane swollen by residual casting solvent displayed an increase in the pure and mixed gas NF3 and CF4 permeabilites and reduced selectivity compared to that of an annealed, fully relaxed Hyflon AD60 membrane.

D.J. Branken; H.M. Krieg; J.P. le Roux; G. Lachmann

2014-01-01T23:59:59.000Z

289

Hydrodynamic flow in the vicinity of a nanopore induced by an applied voltage  

E-Print Network (OSTI)

Continuum simulation is employed to study ion transport and fluid flow through a nanopore in a solid-state membrane under an applied potential drop. Results show the existence of concentration polarization layers on the surfaces of the membrane. The nonuniformity of the ionic distribution gives rise to an electric pressure that drives vortical motion in the fluid. There is also a net hydrodynamic flow through the nanopore due to an asymmetry induced by the membrane surface charge. The qualitative behavior is similar to that observed in a previous study using molecular dynamic simulations. The current--voltage characteristics show some nonlinear features but are not greatly affected by the hydrodynamic flow in the parameter regime studied. In the limit of thin Debye layers, the electric resistance of the system can be characterized using an equivalent circuit with lumped parameters. Generation of vorticity can be understood qualitatively from elementary considerations of the Maxwell stresses. However, the flow...

Mao, Mao; Hu, Guohui

2013-01-01T23:59:59.000Z

290

Protein separations using porous silicon membranes  

E-Print Network (OSTI)

extraction, liquid/liquid extraction, and electrical processes. Of all of these, adsorption/chromatography and membrane separations are perhaps the most promising. According to Wong et al. (1987), chromatography offers very high selectivity but is riddled... heat transfer or heat generating equipment is necessary. The only utility required is electricity to drive pumps. A membrane separation unit operation can also be run at ambient temperature. When balanced against its drawbacks which include fouling...

Pass, Shannon Marie

1992-01-01T23:59:59.000Z

291

The case for applied astronomy  

Science Journals Connector (OSTI)

......research-article Features The case for applied astronomy Martin Elvis Martin Elvis is an astronomer...Elvis looks at our golden age of astronomy and gives his personal view of what the future may hold for space and astronomy research, as that golden age hits......

Martin Elvis

2014-02-01T23:59:59.000Z

292

apply skills & experience build skills  

E-Print Network (OSTI)

senior apply skills & experience junior build skills sophomore research & execute freshman explore options1 2 3 4 s u p p o r t4-year career action plan parent about the center for career development Remind your student that it is never too soon or too late to seek an internship or summer job. build

Alvarez, Pedro J.

293

Applying Science to Everyday Life  

Science Journals Connector (OSTI)

Applying Science to Everyday Life ... Basic science ideas and their application appear regularly in people’s daily lives. ... It should be the goal of chemistry educators and other teachers of science to provide their students (and others when given the opportunity) with an appreciation of some basic principles. ...

Norbert J. Pienta

2014-11-11T23:59:59.000Z

294

Journal of Applied Ecology 2004  

E-Print Network (OSTI)

herbivores provide goods and income to rural communities, have major impacts on land use and habitats-Bianchet REVIEW The management of wild large herbivores to meet economic, conservation and environmental is applied to their management across the globe. To be effective, however, management has to be science

Festa-Bianchet, Marco

295

APPLIED THERMAL ENGINEERING Manuscript Draft  

E-Print Network (OSTI)

the heat pump from the grid during the two hours of electrical peak power · Design of a new heat exchangerAPPLIED THERMAL ENGINEERING Manuscript Draft TITLE: Experimental assessment of a PCM to air heat This paper presents a heat exchanger prototype containing PCM material designed to provide a 1kW heating

Paris-Sud XI, Université de

296

Applied Sustainability Political Science 319  

E-Print Network (OSTI)

1 Applied Sustainability Political Science 319 College of Charleston Spring 2013 Day/Time: TH 1 Address: fisherb@cofc.edu Office: 284 King Street, #206 (Office of Sustainability) Office Hours: by appt sustainability. It will focus on the development of semester-long sustainability projects, from conception

Young, Paul Thomas

297

New Membranes for High Temperature Proton Exchange Membrane Fuel Cells Based on Heteropoly Acids  

Energy.gov (U.S. Department of Energy (DOE))

"Summary of Colorado School of Mines heteropolyacid research presented to the High Temperature Membrane Working Group Meeting, Orlando FL, October 17, 2003 "

298

Carbon-nanotube-based membranes for water desalination by membrane distillation.  

E-Print Network (OSTI)

??This work investigates ways to fabricate composite macro-structures made of carbon nanotubes in combination with polymers and metals to enhance membrane lifespan and performance. Carbon… (more)

Dumee, Ludovic

2011-01-01T23:59:59.000Z

299

Chapter 6 - Nanostructured Membranes for Water Purification  

Science Journals Connector (OSTI)

Application of nanotechnology to water purification is currently faced with the issue of how to design nanomaterials that are capable of collecting and preconcentrating a large number of contaminants per unit volume. Specifically, it is not clear how to interface nanoparticles with contaminants because direct addition of nanoparticles into drinking water may require extra separation steps to recover the expensive nanomaterials. Due to their large pore sizes, conventional membrane filters cannot be used for removing submicron particles, engineered nanoparticles, or biological particles within the range of 100 nm or below. To overcome these challenges, we present transformative membrane technologies that are based on the use of nanostructured conducting phase-inverted poly(amic acid) membranes to isolate and remove silver nanoparticles, quantum dots, and titanium dioxide particles in environmental samples. nPAA membranes have also been utilized to remove pathogenic bacteria in drinking water. Filtration efficiency of over 99.98% was recorded for most contaminants. The membrane pore sizes were experimentally controlled from 4 to 35 nm, and the optimized membranes were tested against three of the most common drinking water contaminants, namely Escherichia coli, Citrobacter freundii, and Staphylococcus epidermidis. Hundred percent removal of these microbial species were recorded and the results were validated with conventional plating techniques.

Omowunmi A. Sadik; Nian Du; Idris Yazgan; Veronica Okello

2014-01-01T23:59:59.000Z

300

Salt Concentration Differences Alter Membrane Resistance in Reverse Electrodialysis Stacks  

E-Print Network (OSTI)

,3,4 Selective transport of ions through the membranes creates an electric potential across pairs of AEMs by changing the membrane polymer chemistry and/or membrane form factor.9-13 The ion transport properties on either side of the membrane on ion transport properties must be studied to improve our under- standing

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Supporting Information for: Salt concentration differences alter membrane  

E-Print Network (OSTI)

). The membrane area available for ion transport was 11.4 cm2 . Platinum mesh electrodes that spanned the crossS1 Supporting Information for: Salt concentration differences alter membrane resistance in reverse-814-867-1847 #12;S2 Membrane resistance measurement Without a concentration difference Membrane resistance

302

Biofouling of reverse-osmosis membranes under different shear rates during tertiary wastewater desalination: Microbial community composition  

Science Journals Connector (OSTI)

Abstract We investigated the influence of feed-water shear rate during reverse-osmosis (RO) desalination on biofouling with respect to microbial community composition developed on the membrane surface. The RO membrane biofilm's microbial community profile was elucidated during desalination of tertiary wastewater effluent in a flat-sheet lab-scale system operated under high (555.6 s?1), medium (370.4 s?1), or low (185.2 s?1) shear rates, corresponding to average velocities of 27.8, 18.5, and 9.3 cm s?1, respectively. Bacterial diversity was highest when medium shear was applied (Shannon–Weaver diversity index H' = 4.30 ± 0.04) compared to RO-membrane biofilm developed under lower and higher shear rates (H? = 3.80 ± 0.26 and H? = 3.42 ± 0.38, respectively). At the medium shear rate, RO-membrane biofilms were dominated by Betaproteobacteria, whereas under lower and higher shear rates, the biofilms were dominated by Alpha- and Gamma- Proteobacteria, and the latter biofilms also contained Deltaproteobacteria. Bacterial abundance on the RO membrane was higher at low and medium shear rates compared to the high shear rate: 8.97 × 108 ± 1.03 × 103, 4.70 × 108 ± 1.70 × 103 and 5.72 × 106 ± 2.09 × 103 copy number per cm2, respectively. Interestingly, at the high shear rate, the RO-membrane biofilm's bacterial community consisted mainly of populations known to excrete high amounts of extracellular polymeric substances. Our results suggest that the RO-membrane biofilm's community composition, structure and abundance differ in accordance with applied shear rate. These results shed new light on the biofouling phenomenon and are important for further development of antibiofouling strategies for RO membranes.

Ashraf Al Ashhab; Osnat Gillor; Moshe Herzberg

2014-01-01T23:59:59.000Z

303

Charged mosaic membrane prepared from microsphere gel and its characterization  

Science Journals Connector (OSTI)

A charged mosaic membrane with parallel array of different negative and positive charges was prepared from microsphere gel. Several characteristics on the novel membrane were investigated through experiments concerning transport studies, membrane potentials and membrane resistance. From analysis of the volume flux and salt flux, preferential salt transport across the charged mosaic membrane was suggested. Membrane potential did not indicate a constant value and the absolute value decreased rapidly in short time. The large time dependence supported the interpretation on salt flow in transport studies. From potential measurement, cationic and anionic transport numbers in membrane also were determined to t?K+=0.41 and t?Cl?=0.59. Membrane resistance of this mosaic membrane indicated slightly higher values than that of ordinary charged membrane.

Akira Yamauchi; Junko Tateyama; Ban-ichiroh Etoh; Minoru Takizawa; Yoshifumi Sugito; Seiji Doi

2000-01-01T23:59:59.000Z

304

Roadmap: Technical and Applied Studies -Computer Technology Applied Computer Security and Forensics Technology -Bachelor of Technical and Applied Studies  

E-Print Network (OSTI)

Roadmap: Technical and Applied Studies - Computer Technology Applied Computer Security (2.000) grade. #12;Roadmap: Technical and Applied Studies - Computer Technology Applied Computer and Forensics Technology - Bachelor of Technical and Applied Studies RE-BTAS-TAS-CTAC Regional College Catalog

Khan, Javed I.

305

Conductivity Measurements of Synthesized Heteropoly Acid Membranes for Proton Exchange Membrane Fuel Cells  

SciTech Connect

Fuel cell technology is receiving attention due to its potential to be a pollution free method of electricity production when using renewably produced hydrogen as fuel. In a Proton Exchange Membrane (PEM) fuel cell H2 and O2 react at separate electrodes, producing electricity, thermal energy, and water. A key component of the PEM fuel cell is the membrane that separates the electrodes. DuPont’s Nafion® is the most commonly used membrane in PEM fuel cells; however, fuel cell dehydration at temperatures near 100°C, resulting in poor conductivity, is a major hindrance to fuel cell performance. Recent studies incorporating heteropoly acids (HPAs) into membranes have shown an increase in conductivity and thus improvement in performance. HPAs are inorganic materials with known high proton conductivities. The primary objective of this work is to measure the conductivity of Nafion, X-Ionomer membranes, and National Renewable Energy Laboratory (NREL) Developed Membranes that are doped with different HPAs at different concentrations. Four-point conductivity measurements using a third generation BekkTech? conductivity test cell are used to determine membrane conductivity. The effect of multiple temperature and humidification levels is also examined. While the classic commercial membrane, Nafion, has a conductivity of approximately 0.10 S/cm, measurements for membranes in this study range from 0.0030 – 0.58 S/cm, depending on membrane type, structure of the HPA, and the relative humidity. In general, the X-ionomer with H6P2W21O71 HPA gave the highest conductivity and the Nafion with the 12-phosphotungstic (PW12) HPA gave the lowest. The NREL composite membranes had conductivities on the order of 0.0013 – 0.025 S/cm.

Record, K.A.; Haley, B.T.; Turner, J.

2006-01-01T23:59:59.000Z

306

Fabrication of porous silicon membranes  

E-Print Network (OSTI)

. In step 1, the surface of silicon is covered with fluorine ions. In step 2, when an electric field is applied across the interface, holes move towards the surface. In step 3, some of the holes are trapped at the surface, and they weaken the silicon...-silicon bonds. In step 4, thermal energy swings away the Si-F groups exposing the holes. In step 5, fluorine ions occupy the holes and release their charges. In the dissolution, Step 3 through Step 5 is repeated, and SiFz is removed from the reacting site...

Yue, Wing Kong

2012-06-07T23:59:59.000Z

307

PAA grafting onto new acrylate-alumoxane/PES mixed matrix nano-enhanced membrane: Preparation, characterization and performance in dye removal  

Science Journals Connector (OSTI)

Nanoboehmite particles were modified by acrylic acid to produce new alumoxane nanoparticles. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were used to realize shape, size and functional groups of synthesized acrylate-alumoxane nanoparticles. The analyses declared that spherical acrylate-alumoxane nanoparticles were formed with hydroxyl and acrylate groups on their surface. Boehmite and acrylate-alumoxane were successfully introduced into polyethersulfone (PES) membrane matrix by the phase inversion method. Fabricated membranes were examined for water permeability, dye (acid blue 193) retention capability and fouling resistance against whey proteins. The field emission scanning electron microscopy (FE-SEM) images were used to estimate the changes in skin-layer morphology and bulk porosity of the prepared membranes. As a result, the directly arrayed finger-like macro-voids as well as bulk porosity were gained by adding acrylate-alumoxane nanoparticles compared to pristine PES membrane. However, different quantities of acrylate-alumoxane in the casting solution induced no noticeable alteration in the membranes bulk porosity. The membranes containing 1 wt.% of acrylate-alumoxane and 1 wt.% of nanoboehmite were selected to be grafted by polyacrylic acid (PAA). Comparison of grafting efficiency for pristine PES membrane and nanofiller blended membranes proved that acrylate-alumoxane offered more effective grafted membrane by providing polymerization initiation sites on mixed matrix membrane surface. In addition to high water permeability (around 19 kg/m2 h bar), the acrylate-alumoxane mixed/PAA grafted membrane showed superior dye removal and fouling resistance. Atomic force microscopy (AFM) as well as water contact angle test was applied for investigation of membranes surface properties.

Parisa Daraei; Sayed Siavash Madaeni; Negin Ghaemi; Mohammad Ali Khadivi; Laleh Rajabi; Ali Ashraf Derakhshan; Fatemeh Seyedpour

2013-01-01T23:59:59.000Z

308

Nevada applied ecology group publications  

SciTech Connect

Since January 1972, the Nevada Applied Ecology Information Center (NAEIC), Information Research and Analysis Section, Health and Safety Research Division, Oak Ridge National Laboratory, has provided technical information support to the Nevada Applied Ecology Group (NAEG) relevant to the behavior of specific radionuclides, primarily plutonium and americium, in the environment, with special emphasis on pathways to man. This bibliography represents a summary of the biomedical and environmental studies conducted by the NAEG and its contractors. The bibliography focuses on research sponsored by the NAEG. Subject areas of the publications include cover studies of soil, vegetation, animals, microorganisms, resuspension, and meteorology. All references in this publication are stored in a computerized form that is readily available for searches upon request to NAEG and it contractors. 558 refs.

Chilton, B.D.; Pfuderer, H.A.; Cox, T.L. (Oak Ridge National Lab., TN (USA))

1989-09-01T23:59:59.000Z

309

Integrated Ceramic Membrane System for Hydrogen Production  

SciTech Connect

Phase I was a technoeconomic feasibility study that defined the process scheme for the integrated ceramic membrane system for hydrogen production and determined the plan for Phase II. The hydrogen production system is comprised of an oxygen transport membrane (OTM) and a hydrogen transport membrane (HTM). Two process options were evaluated: 1) Integrated OTM-HTM reactor – in this configuration, the HTM was a ceramic proton conductor operating at temperatures up to 900°C, and 2) Sequential OTM and HTM reactors – in this configuration, the HTM was assumed to be a Pd alloy operating at less than 600°C. The analysis suggested that there are no technical issues related to either system that cannot be managed. The process with the sequential reactors was found to be more efficient, less expensive, and more likely to be commercialized in a shorter time than the single reactor. Therefore, Phase II focused on the sequential reactor system, specifically, the second stage, or the HTM portion. Work on the OTM portion was conducted in a separate program. Phase IIA began in February 2003. Candidate substrate materials and alloys were identified and porous ceramic tubes were produced and coated with Pd. Much effort was made to develop porous substrates with reasonable pore sizes suitable for Pd alloy coating. The second generation of tubes showed some improvement in pore size control, but this was not enough to get a viable membrane. Further improvements were made to the porous ceramic tube manufacturing process. When a support tube was successfully coated, the membrane was tested to determine the hydrogen flux. The results from all these tests were used to update the technoeconomic analysis from Phase I to confirm that the sequential membrane reactor system can potentially be a low-cost hydrogen supply option when using an existing membrane on a larger scale. Phase IIB began in October 2004 and focused on demonstrating an integrated HTM/water gas shift (WGS) reactor to increase CO conversion and produce more hydrogen than a standard water gas shift reactor would. Substantial improvements in substrate and membrane performance were achieved in another DOE project (DE-FC26-07NT43054). These improved membranes were used for testing in a water gas shift environment in this program. The amount of net H2 generated (defined as the difference of hydrogen produced and fed) was greater than would be produced at equilibrium using conventional water gas shift reactors up to 75 psig because of the shift in equilibrium caused by continuous hydrogen removal. However, methanation happened at higher pressures, 100 and 125 psig, and resulted in less net H2 generated than would be expected by equilibrium conversion alone. An effort to avoid methanation by testing in more oxidizing conditions (by increasing CO2/CO ratio in a feed gas) was successful and net H2 generated was higher (40-60%) than a conventional reactor at equilibrium at all pressures tested (up to 125 psig). A model was developed to predict reactor performance in both cases with and without methanation. The required membrane area depends on conditions, but the required membrane area is about 10 ft2 to produce about 2000 scfh of hydrogen. The maximum amount of hydrogen that can be produced in a membrane reactor decreased significantly due to methanation from about 2600 scfh to about 2400 scfh. Therefore, it is critical to eliminate methanation to fully benefit from the use of a membrane in the reaction. Other modeling work showed that operating a membrane reactor at higher temperature provides an opportunity to make the reactor smaller and potentially provides a significant capital cost savings compared to a shift reactor/PSA combination.

Schwartz, Joseph; Lim, Hankwon; Drnevich, Raymond

2010-08-05T23:59:59.000Z

310

Graphene as a Prototype Crystalline Membrane  

E-Print Network (OSTI)

The understanding of the structural and thermal properties of membranes, low-dimensional flexible systems in a space of higher dimension, is pursued in many fields from string theory to chemistry and biology. The case of a two-dimensional (2D) membrane in three dimensions is the relevant one for dealing with real materials. Traditionally, membranes are primarily discussed in the context of biological membranes and soft matter in general. The complexity of these systems hindered a realistic description of their interatomic structures based on a truly microscopic approach. Therefore, theories of membranes were developed mostly within phenomenological models. From the point of view of statistical mechanics, membranes at finite temperature are systems governed by interacting long-range fluctuations. Graphene, the first truly two-dimensional system consisting of just one layer of carbon atoms, provides a model system for the development of a microscopic description of membranes. In this Account, we review key results in the microscopic theory of structural and thermal properties of graphene and compare them with the predictions of phenomenological theories. The two approaches are in good agreement for the various scaling properties of correlation functions of atomic displacements. However, some other properties, such as the temperature dependence of the bending rigidity, cannot be understood based on phenomenological approaches. We also consider graphene at very high temperature and compare the results with existing models for two-dimensional melting. The melting of graphene presents a different scenario, and we describe that process as the decomposition of the graphene layer into entangled carbon chains.

Mikhail I. Katsnelson; Annalisa Fasolino

2013-02-07T23:59:59.000Z

311

Advanced biomolecular materials based on membrane-protein/polymer complexation  

SciTech Connect

This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The goal of this project was to apply neutron reflectometry and atomic force microscopy to the study of lipid membranes containing proteins. Standard sample preparation techniques were used to produce thin films of these materials appropriate for these techniques. However, these films were not stable, and a new sample preparation technique was required. Toward this goal, the authors have developed a new capability to produce large, freely suspended films of lipid multi-bilayers appropriate for these studies. This system includes a controlled temperature/humidity oven in which the films 5-cm x 5-cm are remotely drawn. The first neutron scattering experiments were then performed using this oven.

Smith, G.S.; Nowak, A. [Los Alamos National Lab., NM (United States); Safinya, C. [Univ. of California, Santa Barbara, CA (United States)

1998-12-01T23:59:59.000Z

312

Renewable Energy Powered Membrane Technology. 1. Development and Characterization of a Photovoltaic Hybrid Membrane System  

Science Journals Connector (OSTI)

Renewable Energy Powered Membrane Technology. 1. Development and Characterization of a Photovoltaic Hybrid Membrane System ... In isolated communities where potable water sources as well as energy grids are limited or nonexistent, treating brackish groundwater aquifers with small-scale desalination systems can be a viable alternative to existing water infrastructures. ...

A.I. Schäfer; A. Broeckmann; B.S. Richards

2006-12-29T23:59:59.000Z

313

Journal of Membrane Science 228 (2004) 516 Experimental study of desalination using direct contact membrane  

E-Print Network (OSTI)

Journal of Membrane Science 228 (2004) 5­16 Experimental study of desalination using direct contact and a new membrane module were investigated to improve water desalination. The performances of three with the reverse osmosis (RO) process for desalination. © 2003 Elsevier B.V. All rights reserved. Keywords

314

Membrane asymmetry in epithelia: is the tight junction a barrier to diffusion in the plasma membrane?  

Science Journals Connector (OSTI)

... Leaf, A. in Membrane Transport in Biology Vol. 3 (eds Giebisch, G., Tosteson, D. C. & Ussing, H. H.) 1–26 (Springer, Berlin, ... Palomo, A. in Membrane Transport in Biology Vol. 3 (eds Giebisch, G., Tosteson, D. C. & Ussing H. H.) 27–53 (Springer, Berlin, ...

Paul R. Dragsten; Robert Blumenthal; Joseph S. Handler

1981-12-24T23:59:59.000Z

315

Catalytic Membrane Reactor: Multilayer membranes elaboration A. Julian1,2,*  

E-Print Network (OSTI)

-en-Josas Cedex, France Abstract Methane conversion to syngas is very attractive for hydrogen or clean fuel production and provides an alternative to oil products. An efficient architecture for the membrane reactor-sintering, perovskite, syngas, mixed conducting materials. Introduction Membrane reactors with mixed oxygen

Paris-Sud XI, Université de

316

A Hybrid Microbial Fuel Cell Membrane Bioreactor with a Conductive Ultrafiltration Membrane Biocathode for Wastewater Treatment  

E-Print Network (OSTI)

Biocathode for Wastewater Treatment Lilian Malaeb,,§ Krishna P. Katuri,,§ Bruce E. Logan, Husnul Maab, S. P-biocathode microbial fuel cell- membrane bioreactor (MFC-MBR) system was developed to achieve simultaneous wastewater and the membrane for wastewater filtration. The MFC-MBR used an air-biocathode, and it was shown to have good

317

Membrane technology works on North Sea platform  

SciTech Connect

The world`s first sulfate removal facility (SRF) on the Brae A production platform in the central North Sea demonstrates the effectiveness of membrane technology with only a few minor problems caused by the retrofit nature of the installation. This is the second in a three-part series that details experiences with membrane technology on the Brae A platform that future users of this membrane technology can use for optimizing their SRF installations. Formation water in the south and central Brae reservoirs contains very high levels of barium ions. Consequently, there is a high potential for forming barium sulfate scale when Brae formation water is mixed with seawater. Because of high levels of barium, conventional methods for preventing barium sulfate scale with chemical scale inhibitors proved difficult and expensive, and are of limited value for protecting the reservoir matrix. Therefore, the Brae field required a process that could selectively remove sulfate ions from seawater yet retain most other salt components. Reverse osmosis appeared to be one option, and subsequent collaboration with FilmTec identified a membrane that would only pass particles of 1 x 10{sup {minus}9} m (nanofiltration) and smaller. This membrane permitted passage of most sodium and chloride ions but let only a small percentage of sulfate ions through.

O`Donnell, K. [Marathon Oil UK Ltd., Aberdeen (United Kingdom)

1996-12-02T23:59:59.000Z

318

Novel, Ceramic Membrane System For Hydrogen Separation  

SciTech Connect

Separation of hydrogen from coal gas represents one of the most promising ways to produce alternative sources of fuel. Ceramatec, teamed with CoorsTek and Sandia National Laboratories has developed materials technology for a pressure driven, high temperature proton-electron mixed conducting membrane system to remove hydrogen from the syngas. This system separates high purity hydrogen and isolates high pressure CO{sub 2} as the retentate, which is amenable to low cost capture and transport to storage sites. The team demonstrated a highly efficient, pressure-driven hydrogen separation membrane to generate high purity hydrogen from syngas using a novel ceramic-ceramic composite membrane. Recognizing the benefits and limitations of present membrane systems, the all-ceramic system has been developed to address the key technical challenges related to materials performance under actual operating conditions, while retaining the advantages of thermal and process compatibility offered by the ceramic membranes. The feasibility of the concept has already been demonstrated at Ceramatec. This project developed advanced materials composition for potential integration with water gas shift rectors to maximize the hydrogenproduction.

Elangovan, S.

2012-12-31T23:59:59.000Z

319

Thermomechanical characterization of a membrane deformable mirror  

SciTech Connect

A membrane deformable mirror has been investigated for its potential use in high-energy laser systems. Experiments were performed in which the deformable mirror was heated with a 1 kW incandescent lamp and the thermal profile, the wavefront aberrations, and the mechanical displacement of the membrane were measured. A finite element model was also developed. The wavefront characterization experiments showed that the wavefront degraded with heating. Above a temperature of 35 deg. C, the wavefront characterization experiments indicated a dramatic increase in the high-order wavefront modes before the optical beam became immeasurable in the sensors. The mechanical displacement data of the membrane mirror showed that during heating, the membrane initially deflected towards the heat source and then deflected away from the heat source. Finite element analysis (FEA) predicted a similar displacement behavior as shown by the mechanical displacement data but over a shorter time scale and a larger magnitude. The mechanical displacement data also showed that the magnitude of membrane displacement increased with the experiments that involved higher temperatures. Above a temperature of 35 deg. C, the displacement data showed that random deflections as a function of time developed and that the magnitude of these deflections increased with increased temperature. We concluded that convection, not captured in the FEA, likely played a dominant role in mirror deformation at temperatures above 35 deg. C.

Morse, Kathleen A.; McHugh, Stuart L.; Fixler, Jeff

2008-10-10T23:59:59.000Z

320

Influence of Ibuprofen on Phospholipid Membranes  

E-Print Network (OSTI)

Basic understanding of biological membranes is of paramount importance as these membranes comprise the very building blocks of life itself. Cells depend in their function on a range of properties of the membrane, which are important for the stability and function of the cell, information and nutrient transport, waste disposal and finally the admission of drugs into the cell and also the deflection of bacteria and viruses. We have investigated the influence of ibuprofen on the structure and dynamics of L-alpha-phosphatidylcholine (SoyPC) membranes by means of grazing incidence small-angle neutron scattering (GISANS), neutron reflectometry and grazing incidence neutron spin echo spectroscopy (GINSES). From the results of these experiments we were able to determine that ibuprofen induces a two-step structuring behavior in the SoyPC films, where the structure evolves from the purely lamellar phase for pure SoyPC over a superposition of two hexagonal phases to a purely hexago- nal phase at high concentrations. Additionally, introduction of ibuprofen stiffens the membranes. This behavior may be instrumental in explaining the toxic behavior of ibuprofen in long-term application.

Sebastian Jaksch; Frederik Lipfert; Alexandros Koutsioubas; Stefan Mattauch; Olaf Holderer; Oxana Ivanova; Henrich Frielinghaus; Samira Hertrich; Stefan F. Fischer; Bert Nickel

2014-06-13T23:59:59.000Z

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Master of Science in Applied Educational Psychology  

E-Print Network (OSTI)

Master of Science in Applied Educational Psychology Distance Education Program A 36-credit hour distance education Selected Courses in Applied Educational Psychology Courses offered via distance education for the Applied Educational Psychology program are taught by faculty with esteemed national

Tennessee, University of

322

Assistant Professor Position In Applied Social Psychology  

E-Print Network (OSTI)

Assistant Professor Position In Applied Social Psychology Applied Social Psychology Program Department of Psychology Colorado State University Job Description and Qualifications The Department of Psychology at Colorado State University invites applications for one tenure- track position in Applied Social

323

Applying Quantum Principles to Psychology  

E-Print Network (OSTI)

This article starts out with a detailed example illustrating the utility of applying quantum probability to psychology. Then it describes several alternative mathematical methods for mapping fundamental quantum concepts (such as state preparation, measurement, state evolution) to fundamental psychological concepts (such as stimulus, response, information processing). For state preparation, we consider both pure states and densities with mixtures. For measurement, we consider projective measurements and positive operator valued measurements. The advantages and disadvantages of each method with respect to applications in psychology are discussed.

Jerome R Busemeyer; Zheng Wang; Andrei Khrennikov; Irina Basieva

2014-05-25T23:59:59.000Z

324

Constant pressure high throughput membrane permeation testing system  

DOE Patents (OSTI)

The disclosure relates to a membrane testing system for individual evaluation of a plurality of planar membranes subjected to a feed gas on one side and a sweep gas on a second side. The membrane testing system provides a pressurized flow of a feed and sweep gas to each membrane testing cell in a plurality of membrane testing cells while a stream of retentate gas from each membrane testing cell is ported by a retentate multiport valve for sampling or venting, and a stream of permeate gas from each membrane testing cell is ported by a permeate multiport valve for sampling or venting. Back pressure regulators and mass flow controllers act to maintain substantially equivalent gas pressures and flow rates on each side of the planar membrane throughout a sampling cycle. A digital controller may be utilized to position the retentate and permeate multiport valves cyclically, allowing for gas sampling of different membrane cells over an extended period of time.

Albenze, Erik J.; Hopkinson, David P.; Luebke, David R.

2014-09-02T23:59:59.000Z

325

Weatherization and Intergovernmental Program: Apply for Weatherization  

NLE Websites -- All DOE Office Websites (Extended Search)

Apply Apply for Weatherization Assistance to someone by E-mail Share Weatherization and Intergovernmental Program: Apply for Weatherization Assistance on Facebook Tweet about Weatherization and Intergovernmental Program: Apply for Weatherization Assistance on Twitter Bookmark Weatherization and Intergovernmental Program: Apply for Weatherization Assistance on Google Bookmark Weatherization and Intergovernmental Program: Apply for Weatherization Assistance on Delicious Rank Weatherization and Intergovernmental Program: Apply for Weatherization Assistance on Digg Find More places to share Weatherization and Intergovernmental Program: Apply for Weatherization Assistance on AddThis.com... Plans, Implementation, & Results Weatherization Assistance Program Weatherization Services

326

CX-100138 Categorical Exclusion Determination  

Energy.gov (U.S. Department of Energy (DOE))

Sacrificial Protective Coating Materials that can be Regenerated In-Situ to Enable High Performance Membranes strong> Award Number: DE-EE0005759 CX(s) Applied: A9, B3.6, B3.15 Date: 12/10/2014 Location(s): CA Office(s): Golden Field Office

327

CX-100180 Categorical Exclusion Determination  

Office of Energy Efficiency and Renewable Energy (EERE)

Continuous Membrane Assisted IBE fermentation from AVAP(R) Sugars Award Number: DE-EE0006879 CX(s) Applied: A9, B3.6 Bioenergy Technologies Office Date: 01/28/2015 Location(s): GA Office(s): Golden Field Office

328

CX-100010: Categorical Exclusion Determination  

Office of Energy Efficiency and Renewable Energy (EERE)

Geothermal Thermoelectric Generation (G-TEG) with integrated Temperature Driven Membrane Distillation and Novel Manganese Oxide for Lithium Extraction CX(s) Applied: A9, B3.6 Date: 08/27/2014 Location(s): Georgia Offices(s): Golden Field Office Technology Office: Geothermal Technologies Award Number: DE-EE0006746

329

CX-008259: Categorical Exclusion Determination  

Energy.gov (U.S. Department of Energy (DOE))

Slipstream Testing of a Membrane Carbon Dioxide Capture Process for Existing Coal-Fired Power Plants CX(s) Applied: A9, B3.6 Date: 03/28/2012 Location(s): Alabama Offices(s): National Energy Technology Laboratory

330

CX-100132 Categorical Exclusion Determination  

Office of Energy Efficiency and Renewable Energy (EERE)

Novel Membranes and Systems for Industrial and Municipal Water Purification and Reuse Award Number: DE-EE0005771 CX(s) Applied: A9, B3.6, B3.15 Date: 12/2/2014 Location(s): NY Office(s): Golden Field Office

331

Anion Exchange Membranes - Transport/Conductivity  

NLE Websites -- All DOE Office Websites (Extended Search)

Fundamental understanding Fundamental understanding * Driving membranes towards applications Anion Exchange Membranes - Transport/Conductivity High Priority * A need for a standard/available AEM (similar to Nafion in PEMs) * Define standard experimental conditions and protocols * A need for much more fundamental studies in transport mechanisms and mechanical properties * A need to develop much more new AEMs with alternative chemistries (new cation and backbone chemistries) Fundamental Studies * TRANSPORT * Conductivity (pure OH - hard to measure) * Water content, λ * Diffusion coefficients, NMR * Drag coefficients * Transference * Solubility * Fundamental transport mechanisms for anion and water transport * Computational Modeling * MORPHOLOGY/CHEMISTRY * Vibrational Spectroscopy: FTIR, Raman

332

Novel Metallic Membranes for Hydrogen Separation  

SciTech Connect

To reduce dependence on oil and emission of greenhouse gases, hydrogen is favored as an energy carrier for the near future. Hydrogen can be converted to electrical energy utilizing fuel cells and turbines. One way to produce hydrogen is to gasify coal which is abundant in the U.S. The coal gasification produces syngas from which hydrogen is then separated. Designing metallic alloys for hydrogen separation membranes which will work in a syngas environment poses significant challenges. In this presentation, a review of technical targets, metallic membrane development activities at NETL and challenges that are facing the development of new technologies will be given.

Dogan, Omer

2011-02-27T23:59:59.000Z

333

Membrane separation advances in FE hydrogen program  

SciTech Connect

Since its inception in Fiscal Year 2003 the US Office of Fossil Energy (FE) Hydrogen from Coal Program has sponsored more than 60 projects and made advances in the science of separating out pure hydrogen from syngas produced through coal gasification. The Program is focusing on advanced hydrogen separation technologies, which include membranes, and combining the WGS reaction and hydrogen separation in a single operation known as process intensification. The article explains the technologies and describes some key FE membrane projects. More details are available from http://www.fossil.energy.gov. 1 fig.

NONE

2007-12-31T23:59:59.000Z

334

Hydrogen separation membrane on a porous substrate  

DOE Patents (OSTI)

A hydrogen permeable membrane is disclosed. The membrane is prepared by forming a mixture of metal oxide powder and ceramic oxide powder and a pore former into an article. The article is dried at elevated temperatures and then sintered in a reducing atmosphere to provide a dense hydrogen permeable portion near the surface of the sintered mixture. The dense hydrogen permeable portion has a higher initial concentration of metal than the remainder of the sintered mixture and is present in the range of from about 20 to about 80 percent by volume of the dense hydrogen permeable portion.

Song, Sun-Ju (Orland Park, IL); Lee, Tae H. (Naperville, IL); Chen, Ling (Woodridge, IL); Dorris, Stephen E. (LaGrange Park, IL); Balachandran, Uthamalingam (Hinsdale, IL)

2011-06-14T23:59:59.000Z

335

High permeance sulfur tolerant Pd/Cu alloy membranes  

DOE Patents (OSTI)

A method of making a membrane permeable to hydrogen gas (H.sub.2.uparw.) is disclosed. The membrane is made by forming a palladium layer, depositing a layer of copper on the palladium layer, and galvanically displacing a portion of the copper with palladium. The membrane has improved resistance to poisoning by H.sub.2S compared to a palladium membrane. The membrane also has increased permeance of hydrogen gas compared to palladium-copper alloys. The membrane can be annealed at a lower temperature for a shorter amount of time.

Ma, Yi Hua; Pomerantz, Natalie

2014-02-18T23:59:59.000Z

336

Water purification and toxicity control of chlorophenols by 3D nanofiber membranes decorated with photocatalytic titania nanoparticles  

Science Journals Connector (OSTI)

Abstract Highly photocatalytic water purification three-dimensional nanofiber membranes were fabricated. We identified the optimal fabrication process of nylon-6 nanofiber membranes suspending titania nanoparticles for potential water purifications and toxicity control of chlorophenols. Nanofibers and nanoparticles were deposited on a soda lime glass substrate by electrospinning and electrospraying, respectively. Titania nanoparticles were used to induce the UV light driven photocatalytic effect and nanofibers were used to tightly suspend the nanoparticles in air. Both batch and continuous deposition processes were introduced in the membrane fabrication process and their water purification performances were compared and quantified using a methylene blue solution, which is often used as a model pollutant. Surface morphologies and characteristics of the membranes fabricated at various process conditions were also provided. The membrane fabricated by the continuous means yielded 100% degradation of the methylene blue solution within 90 min under a relatively weak UV irradiation (0.6 mW/cm2), which promises its potential indoor application. The nano-textured membranes developed in this work was also applied to the real pollutants, such as chlorophenols, and showed a promising performance in their toxicity control.

Seongpil An; Min Wook Lee; Bhavana N. Joshi; Ayeong Jo; Jinho Jung; Sam S. Yoon

2014-01-01T23:59:59.000Z

337

Membrane porters of ATP-binding cassette transport systems are polyphyletic  

E-Print Network (OSTI)

in Membrane porters of ATP-binding cassette transportin Membrane porters of ATP-binding cassette transportin Membrane porters of ATP-binding cassette transport

Wang, Bin

2010-01-01T23:59:59.000Z

338

Control of size and charge selectivity in amphiphilic graft copolymer nanofiltration membranes  

E-Print Network (OSTI)

The throughput and efficiency of membrane separations make polymer filtration membranes an important resource for the pharmaceutical, food and wastewater treatment industries. Nanofiltration (NF) membranes fill an important ...

Lovell, Nathan Gary

2010-01-01T23:59:59.000Z

339

E-Print Network 3.0 - asymmetric ultrafiltration membrane Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

membranes 4, composite membrane supports 4, bioreactors 5, and screen-printing media 6... , K.L. Smith, Asymmetric membrane tablet coating for osmotic drug- delivery,...

340

Applied Materials | Open Energy Information  

Open Energy Info (EERE)

Materials Materials Jump to: navigation, search Name Applied Materials Address 3050 Bowers Avenue Place Santa Clara, California Zip 95054 Sector Solar Stock Symbol AMAT Website http://www.appliedmaterials.co Coordinates 37.3775749°, -121.9794416° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.3775749,"lon":-121.9794416,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Advanced Hydrogen Transport Membranes for Vision 21 Fossil Fuel Plants  

SciTech Connect

The objective of this project was to develop an environmentally benign, inexpensive, and efficient method for separating hydrogen from gas mixtures produced during industrial processes, such as coal gasification. A family of hydrogen separation membranes was developed including single phase mixed conducting ceramics, ceramic/ceramic composites, cermet membranes, cermet membranes containing a hydrogen permeable metal, and intermediate temperature composite layered membranes. Each membrane type had different operating parameters, advantages, and disadvantages that were documented over the course of the project. Research on these membranes progressed from ceramics to cermets to intermediate temperature composite layered membranes. During this progression performance was increased from 0.01 mL x min{sup -1} x cm{sup -2} up to 423 mL x min{sup -1} x cm{sup -2}. Eltron and team membranes not only developed each membrane type, but also membrane surface catalysis and impurity tolerance, creation of thin film membranes, alternative applications such as membrane promoted alkane dehydrogenation, demonstration of scale-up testing, and complete engineering documentation including process and mechanical considerations necessary for inclusion of Eltron membranes in a full scale integrated gasification combined cycle power plant. The results of this project directly led to a new $15 million program funded by the Department of Energy. This new project will focus exclusively on scale-up of this technology as part of the FutureGen initiative.

Carl R. Evenson; Shane E. Roark

2006-03-31T23:59:59.000Z

342

Development of Novel active transport membrane devices. Phase I. Final report, 31 October 1988--31 January 1994  

SciTech Connect

The main objective of this program was to identify and develop a technique for fabricating Active Transport Materials (ATM) into lab-scale membrane devices. Air Products met this objective by applying thin film, multilayer fabrication techniques to support the AT material on a substrate membrane. In Phase IA, spiral-wound hollow fiber membrane modules were fabricated and evaluated. These nonoptimized devices were used to demonstrate the AT-based separation of carbon dioxide from methane, hydrogen sulfide from methane, and ammonia from hydrogen. It was determined that a need exists for a more cost efficient and less energy intensive process for upgrading subquality natural gas. Air Products estimated the effectiveness of ATM for this application and concluded that an optimized ATM system could compete effectively with both conventional acid gas scrubbing technology and current membrane technology. In addition, the optimized ATM system would have lower methane loss and consume less energy than current alternative processes. Air Products made significant progress toward the ultimate goal of commercializing an advanced membrane for upgrading subquality natural gas. The laboratory program focused on developing a high performance hollow fiber substrate and fabricating and evaluating ATM-coated lab-scale hollow fiber membrane modules. Selection criteria for hollow fiber composite membrane supports were developed and used to evaluate candidate polymer compositions. A poly(amide-imide), PAI, was identified for further study. Conditions were identified which produced microporous PAI support membrane with tunable surface porosity in the range 100-1000{Angstrom}. The support fibers exhibited good hydrocarbon resistance and acceptable tensile strength though a higher elongation may ultimately be desirable. ATM materials were coated onto commercial and PAI substrate fiber. Modules containing 1-50 fibers were evaluated for permselectivity, pressure stability, and lifetime.

Laciak, D.V.; Quinn, R.; Choe, G.S.; Cook, P.J.; Tsai, Fu-Jya

1994-08-01T23:59:59.000Z

343

Applied Solar LLC formerly Open Energy Corp and Barnabus Energy Inc | Open  

Open Energy Info (EERE)

formerly Open Energy Corp and Barnabus Energy Inc formerly Open Energy Corp and Barnabus Energy Inc Jump to: navigation, search Name Applied Solar LLC (formerly Open Energy Corp and Barnabus Energy Inc) Place San Diego, California Zip 92121 Sector Solar Product Offers an integrated portfolio of building-integrated PV products such as solar tiles, membranes and asphalt/composition products; also holds license to build concentrating solar power systems. References Applied Solar LLC (formerly Open Energy Corp and Barnabus Energy Inc)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Applied Solar LLC (formerly Open Energy Corp and Barnabus Energy Inc) is a company located in San Diego, California . References ↑ "Applied Solar LLC (formerly Open Energy Corp and Barnabus

344

Microfluidic Systems with Ion-Selective Membranes  

E-Print Network (OSTI)

treatment processes such as electrodialysis and elec- trodeionization (1). These membranes are natural gradients, internal/external ion enrichment, extended polarized layers, surface electroconvection, water effects. More than 70 years ago, ion-selective mem- branes started to be used in industrial water

Chang, Hsueh-Chia

345

Nanosecond Lipid Dynamics in Membranes Containing Cholesterol  

SciTech Connect

Lipid dynamics in the cholesterol-rich (40 mol%) liquid-ordered (lo) phase of dimyristoylphosphatidylcholine membranes were studied using neutron spin-echo and neutron backscattering. Recent theoretical and experimental evidence supports the notion of the liquid-ordered phase in phospholipid membranes as a locally structured liquid, with small ordered domains of a highly dynamic nature in equilibrium with a disordered matrix [S. Meinhardt, R. L. C. Vink and F. Schmid, Proc. Natl. Acad. Sci. U. S. A., 2013, 110(12), 4476 4481, C. L. Armstrong et al., PLoS One, 2013, 8(6), e66162]. This local structure was found to have a pronounced impact on the membranes' dynamical properties. We found that the long-wavelength dynamics in the liquid-ordered phase, associated with the elastic properties of the membranes, were faster by two orders of magnitude as compared to the liquid disordered phase. At the same time, collective nanoscale diffusion was significantly slower. The presence of a soft-mode (a slowing down) in the longwavelength dispersion relationship suggests an upper size limit for the ordered lipid domain of ~220 A. Moreover, from the relaxation rate of the collective lipid diffusion of lipid lipid distances, the lifetime of these domains was estimated to be about 100 nanoseconds.

Armstrong, Clare L [McMaster University] [McMaster University; Haeussler, Wolfgang [FRM-II, Technische Universitaet Munchen] [FRM-II, Technische Universitaet Munchen; Seydel, Tilo [Institut Laue-Langevin (ILL)] [Institut Laue-Langevin (ILL); Katsaras, John [ORNL] [ORNL; Rheinstadter, Maikel C [McMaster University] [McMaster University

2014-01-01T23:59:59.000Z

346

Polyetheretherketone Membranes for Elevated Temperature PEMFCs  

E-Print Network (OSTI)

elevated tempera- tures the long-term stability of the sulfonic acid membranes e.g., Nafion is poor of a hydrogen economy. However, a pure hydrogen economy has difficulties to overcome including storage enable reusing waste heat for domestic and industrial heating thereby improving overall efficiency

Weidner, John W.

347

Adaptation of Yeast Cell Membranes to Ethanol  

Science Journals Connector (OSTI)

...the addition of an energy source and does not...cell membranes to ethanol. | A highly ethanol-tolerant...the addition of an energy source and does not...During growth in ethanol, Saccharomyces strains...as happens with ethanol-tolerant growth...process requires an energy source and does not...

J. Jiménez; T. Benítez

1987-05-01T23:59:59.000Z

348

Fuel cell electrolyte membrane with basic polymer  

DOE Patents (OSTI)

The present invention is an electrolyte membrane comprising an acid and a basic polymer, where the acid is a low-volatile acid that is fluorinated and is either oligomeric or non-polymeric, and where the basic polymer is protonated by the acid and is stable to hydrolysis.

Larson, James M.; Pham, Phat T.; Frey, Matthew H.; Hamrock, Steven J.; Haugen, Gregory M.; Lamanna, William M.

2012-12-04T23:59:59.000Z

349

Influence of Ibuprofen on Phospholipid Membranes  

E-Print Network (OSTI)

Basic understanding of biological membranes is of paramount importance as these membranes comprise the very building blocks of life itself. Cells depend in their function on a range of properties of the membrane, which are important for the stability and function of the cell, information and nutrient transport, waste disposal and finally the admission of drugs into the cell and also the deflection of bacteria and viruses. We have investigated the influence of ibuprofen on the structure and dynamics of L-alpha-phosphatidylcholine (SoyPC) membranes by means of grazing incidence small-angle neutron scattering (GISANS), neutron reflectometry and grazing incidence neutron spin echo spectroscopy (GINSES). From the results of these experiments we were able to determine that ibuprofen induces a two-step structuring behavior in the SoyPC films, where the structure evolves from the purely lamellar phase for pure SoyPC over a superposition of two hexagonal phases to a purely hexago- nal phase at high concentrations. Add...

Jaksch, Sebastian; Koutsioubas, Alexandros; Mattauch, Stefan; Holderer, Olaf; Ivanova, Oxana; Frielinghaus, Henrich; Hertrich, Samira; Nickel, Bert

2014-01-01T23:59:59.000Z

350

Molecular sieving silica membrane fabrication process  

DOE Patents (OSTI)

A process for producing a molecular sieve silica membrane comprising depositing a hybrid organic-inorganic polymer comprising at least one organic constituent and at least one inorganic constituent on a porous substrate material and removing at least a portion of the at least one organic constituent of the hybrid organic-inorganic polymer, forming a porous film.

Raman, Narayan K. (400 Maple St. SE., Apartment 112, Albuquerque, NM 87106); Brinker, Charles Jeffrey (14 Eagle Nest Dr., NE., Albuquerque, NM 87122)

1998-01-01T23:59:59.000Z

351

Molecular sieving silica membrane fabrication process  

DOE Patents (OSTI)

A process for producing a molecular sieve silica membrane comprising depositing a hybrid organic-inorganic polymer comprising at least one organic constituent and at least one inorganic constituent on a porous substrate material and removing at least a portion of the at least one organic constituent of the hybrid organic-inorganic polymer, forming a porous film.

Raman, Narayan K. (Monroeville, PA); Brinker, Charles Jeffrey (Albuquerque, NM)

1999-01-01T23:59:59.000Z

352

ESS 2012 Peer Review - Flow Battery Membrane - David Ofer, Tiax  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Flow Battery Membrane Flow Battery Membrane Energy Storage Systems Program (ESS) Peer Review and Update Meeting 2012 Jack Treger treger.jack@tiaxllc.com Washington DC, September 27, 2012 Flow Battery Membrane Background and Purpose 1 Vanadium redox batteries (VRB) for energy storage require improved ion- selective membranes. * Vanadium permeation across current membranes leads to self-discharge and decreases cycling efficiency: - Negative half cell: V 2+ V 3+ + e - E o = -0.255V - Positive half cell: e - + VO 2 + + 2H + VO 2+ + H 2 O E o = 1.00V . * Current perfluorosulfonic acid polymer membranes are costly. * TIAX is developing a novel composite bipolar membrane: - Composite anionic membrane minimizes content of costly perfluorosulfonic acid polymer - Made bipolar by a cationic surface layer to improve selectivity for

353

Hydrogen Production from Methane Using Oxygen-permeable Ceramic Membranes  

E-Print Network (OSTI)

Non-porous ceramic membranes with mixed ionic and electronic conductivity have received significant interest as membrane reactor systems for the conversion of methane and higher hydrocarbons to higher value products like ...

Faraji, Sedigheh

2010-06-08T23:59:59.000Z

354

Gas Separation Membrane Use in the Refinery and Petrochemical Industries  

E-Print Network (OSTI)

Membranes have gained commercial acceptance as proven methods to recover valuable gases from waste gas streams. This paper explores ways in which gas separation membranes are used in the refinery and petrochemical industries to recover and purify...

Vari, J.

355

How the Membrane Protein AmtB Transports Ammonia  

NLE Websites -- All DOE Office Websites (Extended Search)

side of the membrane that recruits NH4+ and a narrower 20--long hydrophobic channel midway through the membrane that lowers the dissociation constant of NH4+, thereby forming...

356

Impact of Solar PV Laminate Membrane Systems on Roofs | Department...  

Office of Environmental Management (EM)

Information Resources Impact of Solar PV Laminate Membrane Systems on Roofs Impact of Solar PV Laminate Membrane Systems on Roofs In 2008, CH2M HILL performed a solar site...

357

Gas Separation With Graphene Membranes By Will Soutter  

E-Print Network (OSTI)

Gas Separation With Graphene Membranes By Will Soutter Introduction What is Graphene? Benefits of Graphene in Gas Separation Membranes Recent Developments Conclusion References Introduction The separation applications including fuel cells, batteries, gas sensors and gas purification. The materials

Bunch, Scott

358

The Path a Proton Takes Through a Fuel Cell Membrane  

NLE Websites -- All DOE Office Websites (Extended Search)

Path a Proton Takes Through a Fuel Cell Membrane The Path a Proton Takes Through a Fuel Cell Membrane October 11, 2012 | Tags: Basic Energy Sciences (BES), Chemistry, Franklin,...

359

Anion Exchange Membranes for Fuel Cells | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Anion Exchange Membranes for Fuel Cells Anion Exchange Membranes for Fuel Cells Presentation at the AMFC Workshop, May 8-9, 2011, Arlington, VA amfc110811herring.pdf More...

360

High Speed, Low Cost Fabrication of Gas Diffusion Electrodes for Membrane Electrode Assemblies  

SciTech Connect

Fabrication of membrane electrode assemblies (MEAs) depends on creating inks or pastes of catalyst and binder, and applying this suspension to either the membrane (catalyst coated membrane) or gas diffusion media (gas diffusion electrode) and respectively laminating either gas diffusion media or gas diffusion electrodes (GDEs) to the membrane. One barrier to cost effective fabrication for either of these approaches is the development of stable and consistent suspensions. This program investigated the fundamental forces that destabilize the suspensions and developed innovative approaches to create new, highly stable formulations. These more concentrated formulations needed fewer application passes, could be coated over longer and wider substrates, and resulted in significantly lower coating defects. In March of 2012 BASF Fuel Cell released a new high temperature product based on these advances, whereby our customers received higher performing, more uniform MEAs resulting in higher stack build yields. Furthermore, these new materials resulted in an “instant” increase in capacity due to higher product yields and material throughput. Although not part of the original scope of this program, these new formulations have also led us to materials that demonstrate equivalent performance with 30% less precious metal in the anode. This program has achieved two key milestones in DOE’s Manufacturing R&D program: demonstration of processes for direct coating of electrodes and continuous in-line measurement for component fabrication.

DeCastro, Emory S.; Tsou, Yu-Min; Liu, Zhenyu

2013-09-20T23:59:59.000Z

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Transport Membrane Condenser for Water and Energy Recovery from Power Plant Flue Gas  

SciTech Connect

The new waste heat and water recovery technology based on a nanoporous ceramic membrane vapor separation mechanism has been developed for power plant flue gas application. The recovered water vapor and its latent heat from the flue gas can increase the power plant boiler efficiency and reduce water consumption. This report describes the development of the Transport Membrane Condenser (TMC) technology in details for power plant flue gas application. The two-stage TMC design can achieve maximum heat and water recovery based on practical power plant flue gas and cooling water stream conditions. And the report includes: Two-stage TMC water and heat recovery system design based on potential host power plant coal fired flue gas conditions; Membrane performance optimization process based on the flue gas conditions, heat sink conditions, and water and heat transport rate requirement; Pilot-Scale Unit design, fabrication and performance validation test results. Laboratory test results showed the TMC system can exact significant amount of vapor and heat from the flue gases. The recovered water has been tested and proved of good quality, and the impact of SO{sub 2} in the flue gas on the membrane has been evaluated. The TMC pilot-scale system has been field tested with a slip stream of flue gas in a power plant to prove its long term real world operation performance. A TMC scale-up design approach has been investigated and an economic analysis of applying the technology has been performed.

Dexin Wang

2012-03-31T23:59:59.000Z

362

Gas Separation Using Organic-Vapor-Resistent Membranes In Conjunctin With Organic-Vapor-Selective Membranes  

DOE Patents (OSTI)

A process for treating a gas mixture containing at least an organic compound gas or vapor and a second gas, such as natural gas, refinery off-gas or air. The process uses two sequential membrane separation steps, one using membrane selective for the organic compound over the second gas, the other selective for the second gas over the organic vapor. The second-gas-selective membranes use a selective layer made from a polymer having repeating units of a fluorinated polymer, and demonstrate good resistance to plasticization by the organic components in the gas mixture under treatment, and good recovery after exposure to liquid aromatic hydrocarbons. The membrane steps can be combined in either order.

Baker, Richard W. (Palo Alto, CA); Pinnau, Ingo (Palo Alto, CA); He, Zhenjie (Fremont, CA); Da Costa, Andre R. (Menlo Park, CA); Daniels, Ramin (San Jose, CA); Amo, Karl D. (Mountain View, CA); Wijmans, Johannes G. (Menlo Park, CA)

2003-06-03T23:59:59.000Z

363

Sorting of inner nuclear membrane-directed proteins at the endoplasmic reticulum membrane  

E-Print Network (OSTI)

-directed proteins were integrated cotranslationally through the endoplasmic reticulum translocon, and their nonrandom photocrosslinking to two translocon proteins, Sec61± and translocating chain-associated membrane protein (TRAM), revealed that the first...

Saksena, Suraj

2006-04-12T23:59:59.000Z

364

Blend Membranes of Highly Phosphonated Polysulfone and Polybenzimidazoles for High Temperature Proton Exchange Membrane Fuel Cells  

E-Print Network (OSTI)

Energy, Office of Hydrogen, Fuel Cells and InfrastructureD. Kreuer, and J. Maier, Fuel Cells 5, 335 2. M. A. Hickner,Proton Exchange Membrane Fuel Cells R. A. Potrekar † , K. T.

Potrekar, Ravindra

2014-01-01T23:59:59.000Z

365

Electrodeposition of microparticles on polarized ion exchange membranes  

SciTech Connect

The use of ion exchange membranes to extract microparticles from an aqueous solution is considered. The efficiency of removing negatively charged aerosil particles depends substantially on the nature of the membrane located at the anode. It has been established that besides an increase in the electric field intensity the principal factor ensuring an increase in the efficiency of purifying a solution by electrodeposition of microparticles on a membrane surface is a reduction in the flowrate relative to the membrane surface.

Verbich, S.V.; Ponomarev, M.I.; Grebenyuk, V.D.; Dukhin, S.S.

1986-11-01T23:59:59.000Z

366

Membrane Durability in PEM Fuel Cells: Chemical Degradation  

Energy.gov (U.S. Department of Energy (DOE))

Presentation at the 2008 High Temperature Membrane Working Group Meeting held June 9, 2008, in Washington, DC

367

Polymer-electrolyte membrane, electrochemical fuel cell, and related method  

DOE Patents (OSTI)

A polymer-electrolyte membrane is presented. The polymer-electrolyte membrane comprises an acid-functional polymer, and an additive incorporated in at least a portion of the membrane. The additive comprises a fluorinated cycloaliphatic additive, a hydrophobic cycloaliphatic additive, or combinations thereof, wherein the additive has a boiling point greater than about 120.degree. C. An electrochemical fuel cell including the polymer-electrolyte membrane, and a related method, are also presented.

Krishnan, Lakshmi; Yeager, Gary William; Soloveichik, Grigorii Lev

2014-12-09T23:59:59.000Z

368

Strategy for Aging Tests of Fuel Cell Membranes (Presentation)  

Energy.gov (U.S. Department of Energy (DOE))

Presented at the High Temperature Membrane Working Group Meeting (HTMWG) held October 10, 2007 in Washington, D.C.

369

Integration of Non-Traditional Membranes into MEAs  

Energy.gov (U.S. Department of Energy (DOE))

Presented at the 2009 High Temperature Membrane Working Group Meeting held May 18, 2009, in Arlington, Virginia

370

Processing-Performance Relationships for Perfluorosulfonate Ionomer Membrane  

Energy.gov (U.S. Department of Energy (DOE))

Presentation at the 2008 High Temperature Membrane Working Group Meeting held June 9, 2008, in Washington, DC

371

An Industrial Wish List for Membrane-Based Separations  

Energy.gov (U.S. Department of Energy (DOE))

Presentation by Shawn Feist (The Dow Chemical Company) for the Membrane Technology Workshop held July 24, 2012

372

Membrane Performance and Durability Overview for Automotive Fuel Cell Applications  

Energy.gov (U.S. Department of Energy (DOE))

Presented by Tom Greszler of General Motors at the High Temperature Membrane Working Group Meeting, San Francisco, September 14, 2006.

373

A Role for the Membrane in Regulating Chlamydomonas Flagellar Length  

E-Print Network (OSTI)

to the ‘‘old’’ flagellar proteins? Axonemal components can be recycled to form new flagella [55] and some cilia may recycle membrane by endocytosis [42]. However, algal and mammalian cilia also shed membrane from their tips [1], [44]–[46] and data reported here... is shed from flagellar tips, the lack of membrane resupply may stimulate the flagellar disassembly reported here. Inhibition of secretion should affect both protein and membrane delivery to flagella. CX, a protein synthesis inhibitor, inhibits protein...

Dentler, William L., Jr

2013-01-24T23:59:59.000Z

374

Procedure for Performing In-Plane Membrane Conductivity Testing  

Energy.gov (U.S. Department of Energy (DOE))

Presented at the 2009 High Temperature Membrane Working Group Meeting held May 18, 2009, in Arlington, Virginia

375

Agenda for the High Temperature Membrane Working Group Meeting  

Energy.gov (U.S. Department of Energy (DOE))

This agenda provides information about the Agenda for the High Temperature Membrane Working Group Meeting on September 14, 2006.

376

High Temperature Membrane Working Group Meeting, May 14, 2007  

Energy.gov (U.S. Department of Energy (DOE))

This agenda provides information about the High Temperature Membrane Working Group Meeting on May 14, 2007 in Arlington, Va.

377

Interfacial Water-Transport Effects in Proton-Exchange Membranes  

E-Print Network (OSTI)

Materials Modeling in Pem Fuel Cells, A  Combination Model Ionomer Membranes for Pem?Fuel Cells," Electrochimica Acta, 

Kienitz, Brian

2010-01-01T23:59:59.000Z

378

Economical Large Scale Advanced Membrane and Sorbent Strategies  

Energy.gov (U.S. Department of Energy (DOE))

Presentation by William Koros (Georgia Institute of Technology) for the Membrane Technology Workshop held July 24, 2012

379

Advanced membrane devices. Interim report for October 1996--September 1997  

SciTech Connect

Under this Cooperative Agreement, Air Products and Chemicals, Inc. has continued to investigate and develop improved membrane technology for removal of carbon dioxide from natural gas. The task schedule for this reporting period included a detailed assessment of the market opportunity (Chapter 2), continued development and evaluation of membranes and membrane polymers (Chapter 3) and a detailed economic analysis comparing the potential of Air Products membranes to that of established acid gas removal processes (Chapter 4).

Laciak, D.V.; Langsam, M.; Lewnard, J.J.; Reichart, G.C.

1997-12-31T23:59:59.000Z

380

Four-port gas separation membrane module assembly  

DOE Patents (OSTI)

A gas-separation membrane assembly, and a gas-separation process using the assembly. The assembly incorporates multiple gas-separation membranes in an array within a single vessel or housing, and is equipped with two permeate ports, enabling permeate gas to be withdrawn from both ends of the membrane module permeate pipes.

Wynn, Nicholas P. (Redwood City, CA); Fulton, Donald A. (Fairfield, CA); Lokhandwala, Kaaeid A. (Fremont, CA); Kaschemekat, Jurgen (Campbell, CA)

2010-07-20T23:59:59.000Z

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Sartobind Protein A 75 Membrane Adsorbers Operating Instructions  

E-Print Network (OSTI)

Sartobind Protein A 75 Membrane Adsorbers Operating Instructions A Separation Technology Based on Microporous Membranes 85030-517-47 Storage conditions Sartobind Protein A 75 Membrane Adsorbers have. Introduction Sartobind Protein A adsorbers represent a new generation of anti- body purification devices based

Lebendiker, Mario

382

Characterization of a plasma membrane zinc transporter in rat brain  

E-Print Network (OSTI)

Ireland Ltd. Keywords: Ion transport; Membrane vesicles; Excitotoxicity; Zinc homeostasis; TransitionCharacterization of a plasma membrane zinc transporter in rat brain Robert A. Colvin* Department transport in the brain. This report provides convincing evidence of a zinc transporter in plasma membrane

383

Membrane Transport Chloride Transport Across Vesicle and Cell  

E-Print Network (OSTI)

Membrane Transport Chloride Transport Across Vesicle and Cell Membranes by Steroid-Based Receptors-established that molecules which transport cations across cell membranes (cationophores) can have potent biological effects the formation of an ion pair.[4a­g] Anion transport by purely electroneutral systems is still quite rare.[4j

Smith, Bradley D.

384

Futile cycling at the plasma membrane: a hallmark of  

E-Print Network (OSTI)

. Transport systems catalyzing ion influx across the plasma membrane of root cells fall into two broadFutile cycling at the plasma membrane: a hallmark of low-affinity nutrient transport Dev T. Britto-affinity transport systems in the plasma membranes of root cells. In this Opinion article, we illustrate that for six

Britto, Dev T.

385

Topical Review Fluctuations and Fractal Noise in Biological Membranes  

E-Print Network (OSTI)

and transport of ions and molecules across biological membranes. We know that ion transport through mem- branes in electrical properties associated with cell membrane ion transport. Key words: Brownian motion -- Cell membrane elec- trical properties -- Fractals -- Gaussian noise -- Ion transport -- Nonlinear dynamics

386

THE VITELLINE MEMBRANE OF THE UNFERTILIZED HEN'S EGG  

E-Print Network (OSTI)

membrane is charged and asymmetrical. It's directional specificity to ion transport and accompanying volumeTHE VITELLINE MEMBRANE OF THE UNFERTILIZED HEN'S EGG : ELECTROLYTE AND WATER TRANSPORT T. RYMEN J more than just the result of the membrane's ion exchange behaviour and that it may involve an enzymatic

Paris-Sud XI, Université de

387

Ion Transport Through Cell Membrane Channels Jan Gomulkiewicz1  

E-Print Network (OSTI)

1 Ion Transport Through Cell Membrane Channels Jan Gomulkiewicz1 , Jacek Mikisz2 , and Stanislaw various models of ion transport through cell membrane channels. Recent experimental data shows that sizes for the life of a cell. In particular, a fundamental phenomenon is a transport of ions through cell membranes

Miekisz, Jacek

388

Regulation of Ribosome Detachment from the Mammalian Endoplasmic Reticulum Membrane*  

E-Print Network (OSTI)

particle (SRP) cycle and the ribosome cycle. Both SRP and ribosomes bind to the ER membrane as a consequence of the targeting process of translocation. Whereas SRP release from the ER membrane is regulated by the GTPase activities of SRP and the SRP receptor, ribosome release from the ER membrane is thought to occur

Nicchitta, Chris

389

Self-assembled lipid and membrane protein polyhedral nanoparticles  

E-Print Network (OSTI)

Self-assembled lipid and membrane protein polyhedral nanoparticles Tamara Bastaa,1 , Hsin-Jui Wub,1 for review January 28, 2012) We demonstrate that membrane proteins and phospholipids can self-assemble for the self-assembly of lipids and membrane proteins into closed polyhedral structures that can potentially

Stowell, Michael

390

Cellular mechanisms of membrane protein folding William R Skach  

E-Print Network (OSTI)

Cellular mechanisms of membrane protein folding William R Skach The membrane protein­folding. This Perspective will focus on emerging evidence that the RTC functions as a protein-folding machine that restricts. The process of polytopic (multispanning) membrane protein folding can be viewed as a series of sequential

Cai, Long

391

Microfluidic Generation of Lipidic Mesophases for Membrane Protein Crystallization  

E-Print Network (OSTI)

Microfluidic Generation of Lipidic Mesophases for Membrane Protein Crystallization Sarah L. Perry Mathews AVenue, Urbana, Illinois 61801 ReceiVed March 11, 2009 ABSTRACT: We report on a microfluidic conditions of membrane proteins from a membrane-like phase in sub-20 nL volumes. This integrated microfluidic

Kenis, Paul J. A.

392

A critical survey of methods to detect plasma membrane rafts  

Science Journals Connector (OSTI)

...their conclusions about plasma membrane structures. A special focus will be laid on novel...expose our view of the plasma membrane organization...molecule diffusing in the plasma membrane. The beads were kept in the focus of a laser-optical...

2013-01-01T23:59:59.000Z

393

Epoxy-crosslinked sulfonated poly (phenylene) copolymer proton exchange membranes  

DOE Patents (OSTI)

An epoxy-crosslinked sulfonated poly(phenylene) copolymer composition used as proton exchange membranes, methods of making the same, and their use as proton exchange membranes (PEM) in hydrogen fuel cells, direct methanol fuel cell, in electrode casting solutions and electrodes, and in sulfur dioxide electrolyzers. These improved membranes are tougher, have higher temperature capability, and lower SO.sub.2 crossover rates.

Hibbs, Michael (Albuquerque, NM); Fujimoto, Cy H. (Albuquerque, NM); Norman, Kirsten (Albuquerque, NM); Hickner, Michael A. (State College, PA)

2010-10-19T23:59:59.000Z

394

Membrane processes relevant for the polymer electrolyte fuel cell  

E-Print Network (OSTI)

Membrane processes relevant for the polymer electrolyte fuel cell Aleksander Kolstad Chemical. The important aspects concerning the Polymer Electrolyte Membrane Fuel Cell, more commonly known as Proton Exchange Membrane Fuel Cell (PEMFC), have been studied in two separate parts. Part 1 of the thesis

Kjelstrup, Signe

395

Investigations of surrogate cellular membranes using neutron reflectometry  

Science Journals Connector (OSTI)

In this article, methods are presented for the creation and characterization of supported model membranes which can mimic many of the critical attributes of cell membranes. It is demonstrated that neutron reflectometry can characterize the structure, composition and organization of model membranes deposited on solid, nanoporous and polymer supports.

Dubey, M.

2010-10-20T23:59:59.000Z

396

Cleaning Membranes with Focused Ultrasound Beams for Drinking Water Treatment  

E-Print Network (OSTI)

Cleaning Membranes with Focused Ultrasound Beams for Drinking Water Treatment Jian-yu Lu1 , Xi Du2 micro pollutants such as harmful organics and cannot meet the demand for high-quality drinking water. Membrane technologies are known to produce drinking water of the highest quality. However, membrane fouling

Lu, Jian-yu

397

Graphene-based structure, method of suspending graphene membrane, and method of depositing material onto graphene membrane  

DOE Patents (OSTI)

An embodiment of a method of suspending a graphene membrane across a gap in a support structure includes attaching graphene to a substrate. A pre-fabricated support structure having the gap is attached to the graphene. The graphene and the pre-fabricated support structure are then separated from the substrate which leaves the graphene membrane suspended across the gap in the pre-fabricated support structure. An embodiment of a method of depositing material includes placing a support structure having a graphene membrane suspended across a gap under vacuum. A precursor is adsorbed to a surface of the graphene membrane. A portion of the graphene membrane is exposed to a focused electron beam which deposits a material from the precursor onto the graphene membrane. An embodiment of a graphene-based structure includes a support structure having a gap, a graphene membrane suspended across the gap, and a material deposited in a pattern on the graphene membrane.

Zettl, Alexander K.; Meyer, Jannik Christian

2013-04-02T23:59:59.000Z

398

FY08 MEMBRANE CHARACTERIZATION REPORT FOR HYBRID SULFUR ELECTROLYZER  

SciTech Connect

This report summarizes results from all of the membrane testing completed to date at the Savannah River National Laboratory (SRNL) for the sulfur dioxide-depolarized electrolyzer (SDE). Several types of commercially-available membranes have been analyzed for ionic resistance and sulfur dioxide transport including perfluorinated sulfonic acid (PFSA), sulfonated polyether-ketone-ketone (SPEKK), and polybenzimidazole membranes (PBI). Of these membrane types, the poly-benzimidazole membrane, Celtec-L, exhibited the best combination of characteristics for use in an SDE. Several experimental membranes have also been analyzed including hydrated sulfonated Diels-Alder polyphenylenes (SDAPP) membranes from Sandia National Laboratory, perfluorosulfonimide (PFSI) and sulfonated perfluorocyclobutyl aromatic ether (S-PFCB) prepared by Clemson University, hydrated platinum-treated PFSA prepared by Giner Electrochemical Systems (GES) and Pt-Nafion{reg_sign} 115 composites prepared at SRNL. The chemical stability, SO{sub 2} transport and ionic conductivity characteristics have been measured for several commercially available and experimental proton-conducting membranes. Commercially available PFSA membranes such as the Nafion{reg_sign} series exhibited excellent chemical stability and ionic conductivity in sulfur dioxide saturated sulfuric acid solutions. Sulfur dioxide transport in the Nafion{reg_sign} membranes varied proportionally with the thickness and equivalent weight of the membrane. Although the SO{sub 2} transport in the Nafion{reg_sign} membranes is higher than desired, the excellent chemical stability and conductivity makes this membrane the best commercially-available membrane at this time. Initial results indicated that a modified Nafion{reg_sign} membrane incorporating Pt nanoparticles exhibited significantly reduced SO{sub 2} transport. Reduced SO{sub 2} transport was also measured with commercially available PBI membrane and several experimental membranes produced at SNL and Clemson. These membranes also exhibit good chemical stability and conductivity in concentrated sulfuric acid solutions and, thus, serve as promising candidates for the SDE. Therefore, we recommend further testing of these membranes including electrolyzer testing to determine if the reduced SO{sub 2} transport eliminates the formation of sulfur-containing films at the membrane/cathode interface. SO{sub 2} transport measurements in the custom built characterization cell identified experimental limitations of the original design. During the last quarter of FY08 we redesigned and fabricated a new testing cell to overcome the previous limitations. This cell also offers the capability to test membranes under polarized conditions as well as test the performance of MEAs under selected electrolyzer conditions.

Hobbs, D; Hector Colon-Mercado, H; Mark Elvington, M

2008-09-01T23:59:59.000Z

399

Advanced Membrane Systems: Recovering Wasteful and Hazardous Fuel Vapors at the Gasoline Tank  

Energy.gov (U.S. Department of Energy (DOE))

Case study covering Compact Membrane Systems, Inc. and its membrane vapor processor that recovers fuel vapors from gasoline refueling.

400

Novel Membranes and Processes for Oxygen Enrichment  

SciTech Connect

The overall goal of this project is to develop a membrane process that produces air containing 25-35% oxygen, at a cost of $25-40/ton of equivalent pure oxygen (EPO2). Oxygen-enriched air at such a low cost will allow existing air-fueled furnaces to be converted economically to oxygen-enriched furnaces, which in turn will improve the economic and energy efficiency of combustion processes significantly, and reduce the cost of CO{sub 2} capture and sequestration from flue gases throughout the U.S. manufacturing industries. During the 12-month Concept Definition project: We identified a series of perfluoropolymers (PFPs) with promising oxygen/nitrogen separation properties, which were successfully made into thin film composite membranes. The membranes showed oxygen permeance as high as 1,200 gpu and oxygen/nitrogen selectivity of 3.0, and the permeance and selectivity were stable over the time period tested (60 days). We successfully scaled up the production of high-flux PFP-based membranes, using MTR's commercial coaters. Two bench-scale spiral-wound modules with countercurrent designs were made and parametric tests were performed to understand the effect of feed flow rate and pressure, permeate pressure and sweep flow rate on the membrane module separation properties. At various operating conditions that modeled potential industrial operating conditions, the module separation properties were similar to the pure-gas separation properties in the membrane stamps. We also identified and synthesized new polymers [including polymers of intrinsic microporosity (PIMs) and polyimides] with higher oxygen/nitrogen selectivity (3.5-5.0) than the PFPs, and made these polymers into thin film composite membranes. However, these membranes were susceptible to severe aging; pure-gas permeance decreased nearly six-fold within two weeks, making them impractical for industrial applications of oxygen enrichment. We tested the effect of oxygen-enriched air on NO{sub x} emissions using a Bloom baffle burner at GTI. The results are positive and confirm that oxygen-enriched combustion can be carried out without producing higher levels of NOx than normal air firing, if lancing of combustion air is used and the excess air levels are controlled. A simple economic study shows that the membrane processes can produce O{sub 2} at less than $40/ton EPO{sub 2} and an energy cost of 1.1-1.5 MMBtu/ton EPO{sub 2}, which are very favorable compared with conventional technologies such as cryogenics and vacuum pressure swing adsorption processes. The benefits of integrated membrane processes/combustion process trains have been evaluated, and show good savings in process costs and energy consumption, as well as reduced CO{sub 2} emissions. For example, if air containing 30% oxygen is used in natural gas furnaces, the net natural gas savings are an estimated 18% at a burner temperature of 2,500 F, and 32% at a burner temperature of 3,000 F. With a 20% market penetration of membrane-based oxygen-enriched combustion in all combustion processes by 2020, the energy savings would be 414-736 TBtu/y in the U.S. The comparable net cost savings are estimated at $1.2-2.1 billion per year by 2020, calculated as the value of fuel savings subtracted from the cost of oxygen production. The fuel savings of 18%-32% by the membrane/oxygen-enriched combustion corresponds to an 18%-32% reduction in CO{sub 2} emissions, or 23-40 MM ton/y less CO{sub 2} from natural gas-fired furnaces by 2020. In summary, results from this project (Concept Definition phase) are highly promising and clearly demonstrate that membrane processes can produce oxygen-enriched air in a low cost manner that will lower operating costs and energy consumption in industrial combustion processes. Future work will focus on proof-of-concept bench-scale demonstration in the laboratory.

Lin, Haiqing

2011-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Origin of subdiffusion of water molecules on cell membrane surfaces  

E-Print Network (OSTI)

Water molecules play an important role in providing unique environments for biological reactions on cell membranes. It is widely believed that water molecules form bridges that connect lipid molecules and stabilize cell membranes. Using all-atom molecular dynamics simulations, we show that translational and rotational diffusion of water molecules on lipid membrane surfaces exhibit subdiffusion. Moreover, we provide evidence that both divergent mean trapping time (continuous-time random walk) and long-correlated noise (fractional Brownian motion) contribute to this subdiffusion. These results suggest that subdiffusion on cell membranes causes the water retardation, an enhancement of cell membrane stability, and a higher reaction efficiency.

Yamamoto, Eiji; Yasui, Masato; Yasuoka, Kenji

2014-01-01T23:59:59.000Z

402

Advancing the technology base for high-temperature membranes  

SciTech Connect

This is the final report of a two-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). This project addresses the major issues confronting the implementation of high-temperature membranes for separations and catalysis. We are pursuing high-temperature membrane systems that can have a large impact for DOE and be industrially relevant. A major obstacle for increased use of membranes is that most applications require the membrane material to withstand temperatures above those acceptable for polymer-based systems. Advances made by this project have helped industry and DOE move toward high-temperature membrane applications to improve overall energy efficiency.

Dye, R.C.; Birdsell, S.A.; Snow, R.C. [and others

1997-10-01T23:59:59.000Z

403

A Case Study of Reverse Osmosis Applied to the Concentration of Yeast Effluent  

Science Journals Connector (OSTI)

In 1986 PCI Membrane Systems installed a reverse osmosis plant to concentrate an effluent arising from...2 of membrane area. The membrane was a thin film composite membrane designated AFC99.

Alan Merry

1991-01-01T23:59:59.000Z

404

Hydrodynamic flow in the vicinity of a nanopore induced by an applied voltage  

Science Journals Connector (OSTI)

Continuum simulation is employed to study ion transport and fluid flow through a nanopore in a solid-state membrane under an applied potential drop. The results show the existence of concentration polarization layers on the surfaces of the membrane. The nonuniformity of the ionic distribution gives rise to an electric pressure that drives vortical motion in the fluid. There is also a net hydrodynamic flow through the nanopore due to an asymmetry induced by the membrane surface charge. The qualitative behavior is similar to that observed in a previous study using molecular dynamic simulations. The current–voltage characteristics show some nonlinear features but are not greatly affected by the hydrodynamic flow in the parameter regime studied. In the limit of thin Debye layers, the electric resistance of the system can be characterized using an equivalent circuit with lumped parameters. Generation of vorticity can be understood qualitatively from elementary considerations of the Maxwell stresses. However, the flow strength is a strongly nonlinear function of the applied field. Combination of electrophoretic and hydrodynamic effects can lead to ion selectivity in terms of valences and this could have some practical applications in separations.

Mao Mao; Sandip Ghosal; Guohui Hu

2013-01-01T23:59:59.000Z

405

Hydrodynamic flow in the vicinity of a nanopore induced by an applied voltage  

E-Print Network (OSTI)

Continuum simulation is employed to study ion transport and fluid flow through a nanopore in a solid-state membrane under an applied potential drop. Results show the existence of concentration polarization layers on the surfaces of the membrane. The nonuniformity of the ionic distribution gives rise to an electric pressure that drives vortical motion in the fluid. There is also a net hydrodynamic flow through the nanopore due to an asymmetry induced by the membrane surface charge. The qualitative behavior is similar to that observed in a previous study using molecular dynamic simulations. The current--voltage characteristics show some nonlinear features but are not greatly affected by the hydrodynamic flow in the parameter regime studied. In the limit of thin Debye layers, the electric resistance of the system can be characterized using an equivalent circuit with lumped parameters. Generation of vorticity can be understood qualitatively from elementary considerations of the Maxwell stresses. However, the flow strength is a strongly nonlinear function of the applied field. Combination of electrophoretic and hydrodynamic effects can lead to ion selectivity in terms of valences and this could have some practical applications in separations.

Mao Mao; Sandip Ghosal; Guohui Hu

2013-05-16T23:59:59.000Z

406

Method of producing a carbon coated ceramic membrane and associated product  

DOE Patents (OSTI)

A method is described for producing a carbon coated ceramic membrane including passing a selected hydrocarbon vapor through a ceramic membrane and controlling ceramic membrane exposure temperature and ceramic membrane exposure time. The method produces a carbon coated ceramic membrane of reduced pore size and modified surface properties having increased chemical, thermal and hydrothermal stability over an uncoated ceramic membrane. 12 figures.

Liu, P.K.T.; Gallaher, G.R.; Wu, J.C.S.

1993-11-16T23:59:59.000Z

407

Method of producing a carbon coated ceramic membrane and associated product  

DOE Patents (OSTI)

A method of producing a carbon coated ceramic membrane including passing a selected hydrocarbon vapor through a ceramic membrane and controlling ceramic membrane exposure temperature and ceramic membrane exposure time. The method produces a carbon coated ceramic membrane of reduced pore size and modified surface properties having increased chemical, thermal and hydrothermal stability over an uncoated ceramic membrane.

Liu, Paul K. T. (O'Hara Township, Allegheny County, PA); Gallaher, George R. (Oakmont Borough, PA); Wu, Jeffrey C. S. (Pittsburgh, PA)

1993-01-01T23:59:59.000Z

408

Design and Development of New Glass-Ceramic Proton Conducting Membranes  

E-Print Network (OSTI)

oxide anion conductivity. These membranes being solid in nature do not suffer from fuel cross membranes, phosphoric acid membranes, and solid oxide membranes. Polymer exchange membranes, or more electrodes. Solid oxide membranes are typically operated between 700o C to 1,000o C, where the use

409

How to Apply for the ENERGY STAR®  

Energy.gov (U.S. Department of Energy (DOE))

Join us to learn about applying for ENERGY STAR Certification in Portfolio Manager. Understand the value of the ENERGY STAR certification, see the step-by-step process of applying, and gain tips to...

410

Driving Membrane Curvature | Advanced Photon Source  

NLE Websites -- All DOE Office Websites (Extended Search)

Unlocking the Nanoscale Secrets of Bird-Feather Colors Unlocking the Nanoscale Secrets of Bird-Feather Colors An Unlikely Route to Ferroelectricity How to Make a Splash Pressure-Tuning the Quantum Phase Transition in a Model 2-D Magnet Reappearing Superconductivity Surprises Scientists Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Driving Membrane Curvature JUNE 14, 2012 Bookmark and Share Model of conformational change in the HIV gp41 fusion protein induced by cholesterol composition of lipid monolayers. In biological systems, membranes are as important as water. They form the barrier between the inner world, within our cells, where we perform the chemical reactions of life, and the outside environment.

411

A Ceramic membrane to Recycle Caustic  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

A A Ceramic Membrane to Recycle Caustic in Low-Activity Waste Stream Processing The Office of Waste Processing is sponsoring an R&D project with Ceramatec, Inc. to develop a ceramic membrane capable of separating sodium from the Hanford Low Activity Waste (LAW) stream. The Hanford High-Level Waste (HLW) tanks must be maintained in a caustic environment to inhibit corrosion. Consequently, they contain large quantities of NaOH. Ultimately the HLW will be retrieved, separated into HLW and LAW streams, with both streams being vitrified at the Waste Treatment Plant (WTP). Prior to processing, additional NaOH will be added to the LAW stream to solubilize the alumina, preventing alumina precipitation, but further increasing the NaOH quantity. This project's goal is to separate the sodium from the LAW stream prior to vitrification which will allow the NaOH to be recycled and further

412

Mixed conducting membranes for syngas production  

DOE Patents (OSTI)

This invention presents a new class of multicomponent metallic oxides which are particularly suited toward use in fabricating components used in processes for producing syngas. The non-stoichiometric, A-site rich compositions of the present invention are represented by the formula (Ln.sub.x Ca.sub.1-x).sub.y FeO.sub.3-.delta. wherein Ln is La or a mixture of lanthanides comprising La, and wherein 1.0>x>0.5, 1.1.gtoreq.y>1.0 and .delta. is a number which renders the composition of matter charge neutral. Solid-state membranes formed from these compositions provide a favorable balance of oxygen permeance and resistance to degradation when employed in processes for producing syngas. This invention also presents a process for making syngas which utilizes such membranes.

Dyer, Paul Nigel (Allentown, PA); Carolan, Michael Francis (Allentown, PA); Butt, Darryl (Gainesville, FL); Van Doorn, Rene Hendrick Elias (Neckarsulm, DE); Cutler, Raymond Ashton (Bountiful, UT)

2002-01-01T23:59:59.000Z

413

Hydrogen transport membranes for dehydrogenation reactions  

DOE Patents (OSTI)

A method of converting C.sub.2 and/or higher alkanes to olefins by contacting a feedstock containing C.sub.2 and/or higher alkanes with a first surface of a metal composite membrane of a sintered homogenous mixture of an Al oxide or stabilized or partially stabilized Zr oxide ceramic powder and a metal powder of one or more of Pd, Nb, V, Zr, Ta and/or alloys or mixtures thereof. The alkanes dehydrogenate to olefins by contact with the first surface with substantially only atomic hydrogen from the dehydrogenation of the alkanes passing through the metal composite membrane. Apparatus for effecting the conversion and separation is also disclosed.

Balachandran; Uthamalingam (Hinsdale, IL)

2008-02-12T23:59:59.000Z

414

Fuel cell membranes and crossover prevention  

DOE Patents (OSTI)

A membrane electrode assembly for use with a direct organic fuel cell containing a formic acid fuel includes a solid polymer electrolyte having first and second surfaces, an anode on the first surface and a cathode on the second surface and electrically linked to the anode. The solid polymer electrolyte has a thickness t:.gtoreq..times..times..times..times. ##EQU00001## where C.sub.f is the formic acid fuel concentration over the anode, D.sub.f is the effective diffusivity of the fuel in the solid polymer electrolyte, K.sub.f is the equilibrium constant for partition coefficient for the fuel into the solid polymer electrolyte membrane, I is Faraday's constant n.sub.f is the number of electrons released when 1 molecule of the fuel is oxidized, and j.sub.f.sup.c is an empirically determined crossover rate of fuel above which the fuel cell does not operate.

Masel, Richard I. (Champaign, IL); York, Cynthia A. (Newington, CT); Waszczuk, Piotr (White Bear Lake, MN); Wieckowski, Andrzej (Champaign, IL)

2009-08-04T23:59:59.000Z

415

Budding of domains in mixed bilayer membranes  

E-Print Network (OSTI)

We propose a model that accounts for budding behavior of domains in lipid bilayers, where each of the bilayer leaflets has a coupling between its local curvature and local lipid composition. The compositional asymmetry between the two monolayers leads to an overall spontaneous curvature. The membrane free-energy contains three contributions: bending energy, line tension, and a Landau free-energy for a lateral phase separation. Within a mean-field treatment, we obtain various phase diagrams which contain fully-budded, dimpled and flat states. In particular, for some range of membrane parameters, the phase diagrams exhibit a tricritical behavior as well as three-phase coexistence region. The global phase diagrams can be divided into three types and are analyzed in terms of the curvature-composition coupling parameter and domain size.

Wolff, Jean; Andelman, David

2014-01-01T23:59:59.000Z

416

Budding of domains in mixed bilayer membranes  

E-Print Network (OSTI)

We propose a model that accounts for budding behavior of domains in lipid bilayers, where each of the bilayer leaflets has a coupling between its local curvature and local lipid composition. The compositional asymmetry between the two monolayers leads to an overall spontaneous curvature. The membrane free-energy contains three contributions: bending energy, line tension, and a Landau free-energy for a lateral phase separation. Within a mean-field treatment, we obtain various phase diagrams which contain fully-budded, dimpled and flat states. In particular, for some range of membrane parameters, the phase diagrams exhibit a tricritical behavior as well as three-phase coexistence region. The global phase diagrams can be divided into three types and are analyzed in terms of the curvature-composition coupling parameter and domain size.

Jean Wolff; Shigeyuki Komura; David Andelman

2014-10-14T23:59:59.000Z

417

Roadmap: Technical and Applied Studies Computer Technology Applied Computer Security and Forensics Technology  

E-Print Network (OSTI)

Roadmap: Technical and Applied Studies ­ Computer Technology Applied Computer Security-division credit hours #12;Roadmap: Technical and Applied Studies ­ Computer Technology Applied Computer Security and Forensics Technology ­ Bachelor of Technical and Applied Studies [RE-BTAS-TAS-CTAC] Regional College Catalog

Sheridan, Scott

418

Fuel Cell Technologies Office: 2009 High Temperature Membrane Working Group  

NLE Websites -- All DOE Office Websites (Extended Search)

9 High Temperature 9 High Temperature Membrane Working Group Meeting Archives to someone by E-mail Share Fuel Cell Technologies Office: 2009 High Temperature Membrane Working Group Meeting Archives on Facebook Tweet about Fuel Cell Technologies Office: 2009 High Temperature Membrane Working Group Meeting Archives on Twitter Bookmark Fuel Cell Technologies Office: 2009 High Temperature Membrane Working Group Meeting Archives on Google Bookmark Fuel Cell Technologies Office: 2009 High Temperature Membrane Working Group Meeting Archives on Delicious Rank Fuel Cell Technologies Office: 2009 High Temperature Membrane Working Group Meeting Archives on Digg Find More places to share Fuel Cell Technologies Office: 2009 High Temperature Membrane Working Group Meeting Archives on AddThis.com...

419

NETL: Low-Pressure Membrane Contactors for CO2 Capture  

NLE Websites -- All DOE Office Websites (Extended Search)

Low-Pressure Membrane Contactors for CO2 Capture Low-Pressure Membrane Contactors for CO2 Capture Project No.: DE-FE0007553 Membrane Technology and Research, Inc. (MTR) is developing a new type of membrane contactor (or mega-module) to separate carbon dioxide (CO2) from power plant flue gas. This module's membrane area is 500 square meters, 20 to 25 times larger than that of current modules used for CO2 capture. A 500-MWe coal power plant requires 0.5 to 1 million square meters of membrane to achieve 90 percent CO2 capture. The new mega-modules can drastically reduce the cost, complexity, and footprint of commercial-scale membrane module integration. Energy savings due to low-pressure drops for gases circulated through the modules, as well as improved countercurrent flow, are additional benefits. The feasibility of using mega-modules in several different hybrid process designs is being evaluated for future development potential.

420

Ionically Conducting Membranes for Hydrogen Production and Separation  

NLE Websites -- All DOE Office Websites (Extended Search)

IONICALLY CONDUCTING MEMBRANES IONICALLY CONDUCTING MEMBRANES FOR HYDROGEN PRODUCTION AND SEPARATION Presented by Tony Sammells Eltron Research Inc. Boulder, Colorado www.eltronresearch.com Presented at DOE Hydrogen Separations Workshop Arlington, Virginia September 8, 2004 ELTRON RESEARCH INC. TO BE DISCUSSED * Membranes for Hydrogen Production - Compositions - Feedstocks - Performance - Key Technical Hurdles * Membranes for Hydrogen Separation - Compositions - Ex Situ vs. In Situ WGS - Performance - Key Technical Hurdles ELTRON RESEARCH INC. OVERALL SCHEME FOR CONVERTING FEEDSTOCK TO HYDROGEN WITH SIMULTANEOUS CARBON DIOXIDE SEQUESTRATION Oxygen Transport Membrane Hydrogen Transport Membrane Natural Gas Coal Biomass Syngas CO/H 2 WGS H 2 O CO 2 /H 2 1618afs.dsf H 2 CO 2 ELTRON RESEARCH INC. INCENTIVES FOR OXYGEN TRANSPORT MEMBRANES FOR

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

The Dynamics of Platinum Precipitation in an Ion Exchange Membrane  

E-Print Network (OSTI)

Microscopy of polymer electrolyte membranes that have undergone operation under fuel cell conditions, have revealed a well defined band of platinum in the membrane. Here, we propose a physics based model that captures the mechanism of platinum precipitation in the polymer electrolyte membrane. While platinum is observed throughout the membrane, the preferential growth of platinum at the band of platinum is dependent on the electrochemical potential distribution in the membrane. In this paper, the location of the platinum band is calculated as a function of the gas concentration at the cathode and anode, gas diffusion coefficients and solubility constants of the gases in the membrane, which are functions of relative humidity. Under H2/N2 conditions the platinum band is located near the cathode-membrane interface, as the oxygen concentration in the cathode gas stream increases and/or the hydrogen concentration in the anode gas stream decreases, the band moves towards the anode. The model developed in this paper...

Burlatsky, S F; Atrazhev, V V; Dmitriev, D V; Kuzminyh, N Y; Erikhman, N S

2013-01-01T23:59:59.000Z

422

Method for dialysis on microchips using thin porous polymer membrane  

DOE Patents (OSTI)

Laser-induced phase-separation polymerization of a porous acrylate polymer is used for in-situ fabrication of dialysis membranes inside glass microchannels. A shaped 355 nm laser beam is used to produce a porous polymer membrane with a thickness of about 15 .mu.m, which bonds to the glass microchannel and forms a semi-permeable membrane. Differential permeation through a membrane formed with pentaerythritol triacrylate was observed and quantified by comparing the response of the membrane to fluorescein and fluorescently tagging 200 nm latex microspheres. Differential permeation was observed and quantified by comparing the response to rhodamine 560 and lactalbumin protein in a membrane formed with SPE-methylene bisacrylamide. The porous membranes illustrate the capability for the present technique to integrate sample cleanup into chip-based analysis systems.

Singh, Anup K. (San Francisco, CA); Kirby, Brian J. (San Francisco, CA); Shepodd, Timothy J. (Livermore, CA)

2009-05-19T23:59:59.000Z

423

Dialysis on microchips using thin porous polymer membranes  

DOE Patents (OSTI)

Laser-induced phase-separation polymerization of a porous acrylate polymer is used for in-situ fabrication of dialysis membranes inside glass microchannels. A shaped 355 nm laser beam is used to produce a porous polymer membrane with a thickness of about 15 .mu.m, which bonds to the glass microchannel and form a semi-permeable membrane. Differential permeation through a membrane formed with pentaerythritol triacrylate was observed and quantified by comparing the response of the membrane to fluorescein and fluorescently tagging 200 nm latex microspheres. Differential permeation was observed and quantified by comparing the response to rhodamine 560 and lactalbumin protein in a membrane formed with SPE-methylene bisacrylamide. The porous membranes illustrate the capability for the present technique to integrate sample cleanup into chip-based analysis systems.

Singh, Anup K. (San Francisco, CA); Kirby, Brian J. (San Francisco, CA); Shepodd, Timothy J. (Livermore, CA)

2007-09-04T23:59:59.000Z

424

New Membrane Technology Boosts Efficiency in Industrial Gas Processes  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Membrane Technology and Membrane Technology and Research, Inc. (MTR), based in Menlo Park, CA, is a privately- owned developer, manufacturer, and supplier of customized membrane process solutions. Currently, the company's principal membrane products are * VaporSep® systems to remove organic vapors from air and nitrogen * NitroSep TM and fuel gas conditioning systems for natural gas treatment * Hydrogen recovery systems for refinery and other applications MTR's current R&D is extending use of membranes to carbon sequestration and biofuels separations. www.mtrinc.com New Membrane Technology Boosts Efficiency in Industrial Gas Processes Challenge Membrane technology was first commercialized in the 1960s and 1970s for well-known applications such as water filtration

425

Oxy-combustion: Oxygen Transport Membrane Development  

NLE Websites -- All DOE Office Websites (Extended Search)

combustion: Oxygen Transport combustion: Oxygen Transport Membrane Development Background The mission of the U.S. Department of Energy's (DOE) Existing Plants, Emissions & Capture (EPEC) Research & Development (R&D) Program is to develop innovative environmental control technologies to enable full use of the nation's vast coal reserves, while at the same time allowing the current fleet of coal-fired power plants to comply with existing and emerging environmental regulations. The EPEC R&D

426

Power generation method including membrane separation  

DOE Patents (OSTI)

A method for generating electric power, such as at, or close to, natural gas fields. The method includes conditioning natural gas containing C.sub.3+ hydrocarbons and/or acid gas by means of a membrane separation step. This step creates a leaner, sweeter, drier gas, which is then used as combustion fuel to run a turbine, which is in turn used for power generation.

Lokhandwala, Kaaeid A. (Union City, CA)

2000-01-01T23:59:59.000Z

427

Master of Science in Applied Educational Psychology  

E-Print Network (OSTI)

Master of Science in Applied Educational Psychology Distance Education Program A 36-credit hour settings. Selected Courses in Applied Educational Psychology Courses offered via distance education for the Applied Educational Psychology program are taught by faculty with esteemed national and international

Tennessee, University of

428

SYLLABUS--GEOGRAPHY (GEOG)-455 APPLIED CLIMATOLOGY  

E-Print Network (OSTI)

SYLLABUS--GEOGRAPHY (GEOG)-455 APPLIED CLIMATOLOGY Spring 2006 Time: T-R 12:30-1:45 p.m. (BOL B95-455-001-lec@uwm.edu Textbooks: Thompson-Perry, Applied Climatology: principles and practice, (1997, graduate students will prepare a 10 page (2500 word minimum) paper on a project using applied climatology

Saldin, Dilano

429

Department of Applied Physics Introductory Handbook  

E-Print Network (OSTI)

Department of Applied Physics Introductory Handbook Version 2009-05-29 #12;2 Phone: +46 (0) 8 5537 8102 www.aphys.kth.se Visiting address Roslagstullsbacken 21 Delivery address KTH Applied Physics AlbaNova University Center Roslagsvägen 30B 114 19 Stockholm Postal address KTH Applied Physics AlbaNova University

Haviland, David

430

EM Task 9 - Centrifugal Membrane Filtration  

SciTech Connect

This project is designed to establish the utility of a novel centrifugal membrane filtration technology for the remediation of liquid mixed waste streams at US Department of Energy (DOE) facilities in support of the DOE Environmental Management (EM) program. The Energy and Environmental Research Center (EERC) has teamed with SpinTek Membrane Systems, Inc., a small business and owner of the novel centrifugal membrane filtration technology, to establish the applicability of the technology to DOE site remediation and the commercial viability of the technology for liquid mixed waste stream remediation. The technology is a uniquely configured process that makes use of ultrafiltration and centrifugal force to separate suspended and dissolved solids from liquid waste streams, producing a filtered water stream and a low-volume contaminated concentrate stream. This technology has the potential for effective and efficient waste volume minimization, the treatment of liquid tank wastes, the remediation of contaminated groundwater plumes, and the treatment of secondary liquid waste streams from other remediation processes, as well as the liquid waste stream generated during decontamination and decommissioning activities.

Stevens, B.G.; Stepan, D.J.; Hetland, M.D.

1998-11-01T23:59:59.000Z

431

Inorganic membranes: The new industrial revolution  

SciTech Connect

Separation systems are a vital part of most industrial processes. These systems account for a large fraction of the capital equipment used and the operating costs of industrial processes. Inorganic membranes have the potential for providing separation systems that can significantly reduce both the capital equipment and operating costs. These separation processes include waste management and recycle as well as the primary production of raw materials and products. The authors are rapidly learning to understand the effect of physical and chemical properties on the different transport mechanisms that occur in inorganic membranes. Such understanding can be expected to provide the information needed to design, engineer and manufacture inorganic membranes to produce very high separation factors for almost any separation function. To implement such a revolution, the authors need to organize a unique partnership between the national laboratories, and industry. The university can provide research to understand the materials and transport mechanisms that produce various separations, the national laboratories the development of an economical fabrication and manufacturing capability, and industry the practical understanding of the operational problems required to achieve inplementation.

Fain, D.E. [Martin Merietta Energy Systems, Oak Ridge, TN (United States)

1994-12-31T23:59:59.000Z

432

NETL: Hydrogen Selective Exfoliated Zeolite Membranes  

NLE Websites -- All DOE Office Websites (Extended Search)

Designing and Validating Ternay Pd Alloys for Optimum Sulfur/Carbon Resistance Designing and Validating Ternay Pd Alloys for Optimum Sulfur/Carbon Resistance Project No.: DE-FE0001181 Gas Permeation Cell and Test Stand Pall Corporation is developing an economically-viable hydrogen/carbon dioxide (H2/CO2) separation membrane system that would allow efficient capture of CO2 at high temperature and pressure from gasified coal in the presence of typical contaminants. Goals for the project include creating an advanced palladium alloy for optimum hydrogen separation performance using combinatorial material methods for high-throughput screening, testing, and characterization and demonstrating durability by long term testing of a pilot membrane module at a commercial coal gasification facility. The advantages of this technology are reduction of CO2 compression costs, lack of need for both upstream and downstream heat exchange and complex heat integration, and the potential for integration with water gas shift in a single compact membrane reactor system.

433

Categorical Exclusion Determinations: Indiana | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

September 16, 2010 September 16, 2010 CX-003912: Categorical Exclusion Determination Indiana-County-Elkhart CX(s) Applied: B5.1 Date: 09/16/2010 Location(s): Elkhart County, Indiana Office(s): Energy Efficiency and Renewable Energy September 7, 2010 CX-003781: Categorical Exclusion Determination Advanced Spark Ignited Engine Development for Combined Heat and Power Application CX(s) Applied: A9, A11, B2.2, B3.6, B5.1 Date: 09/07/2010 Location(s): Columbus, Indiana Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory September 1, 2010 CX-003675: Categorical Exclusion Determination Oxy-combustion Oxygen Transport Membrane Development CX(s) Applied: B3.6 Date: 09/01/2010 Location(s): Indianapolis, Indiana Office(s): Fossil Energy, National Energy Technology Laboratory

434

Categorical Exclusion Determinations: Golden Field Office | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8, 2010 8, 2010 CX-003402: Categorical Exclusion Determination Corrugated Membrane and Fuel Cell Structures CX(s) Applied: B3.6 Date: 08/16/2010 Location(s): New Castle, Delaware Office(s): Energy Efficiency and Renewable Energy, Golden Field Office August 17, 2010 CX-003497: Categorical Exclusion Determination Research on Fuel Cell Powered by Hydrogen from Biomass to Provide Clean Energy for Remote Farms away from Electric Grid CX(s) Applied: A9 Date: 08/17/2010 Location(s): Farmingdale, New York Office(s): Energy Efficiency and Renewable Energy, Golden Field Office August 17, 2010 CX-003493: Categorical Exclusion Determination Recovery Act: Innovative Exploration Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico CX(s) Applied: B3.1 Date: 08/17/2010 Location(s): New Mexico

435

Categorical Exclusion Determinations: Kentucky | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

June 2, 2010 June 2, 2010 CX-002501: Categorical Exclusion Determination Beneficiation of Fine Size Powder River Basin Coal CX(s) Applied: B3.6 Date: 06/02/2010 Location(s): Lexington, Kentucky Office(s): Fossil Energy, National Energy Technology Laboratory June 2, 2010 CX-003128: Categorical Exclusion Determination University of Kentucky Research Foundation -A Solvent/Membrane Hybrid Post-combustion Carbon Dioxide Capture Process CX(s) Applied: B3.6 Date: 06/02/2010 Location(s): Kentucky Office(s): Advanced Research Projects Agency - Energy May 27, 2010 CX-002516: Categorical Exclusion Determination Industrial Facility Retrofit Showcase - Arch Chemicals, Inc. CX(s) Applied: B5.1 Date: 05/27/2010 Location(s): Brandenburg, Kentucky Office(s): Energy Efficiency and Renewable Energy, National Energy

436

Categorical Exclusion Determinations: National Energy Technology Laboratory  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

23, 2010 23, 2010 CX-003463: Categorical Exclusion Determination Carbon Dioxide Capture by Sub-Ambient Membrane Operation CX(s) Applied: A9, B3.6 Date: 08/23/2010 Location(s): Newark, Delaware Office(s): Fossil Energy, National Energy Technology Laboratory August 23, 2010 CX-003462: Categorical Exclusion Determination Visitor's Center Conference Room CX(s) Applied: B1.7, B1.15 Date: 08/23/2010 Location(s): Morgantown,West Virginia Office(s): Fossil Energy, National Energy Technology Laboratory August 23, 2010 CX-003461: Categorical Exclusion Determination Low-Cost Wet Gas Compressor for Stripper Gas Wells CX(s) Applied: B3.6 Date: 08/23/2010 Location(s): Cambridge, Massachusetts Office(s): Fossil Energy, National Energy Technology Laboratory August 23, 2010 CX-003460: Categorical Exclusion Determination

437

Categorical Exclusion Determinations: Office of Energy Efficiency and  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

9, 2010 9, 2010 CX-003499: Categorical Exclusion Determination High Temperature Hydrogen Generation Systems CX(s) Applied: B3.6 Date: 08/19/2010 Location(s): South Carolina Office(s): Energy Efficiency and Renewable Energy, Golden Field Office August 19, 2010 CX-003496: Categorical Exclusion Determination Development of Biofuels Using Ionic Transfer Membranes CX(s) Applied: A9, B3.6 Date: 08/19/2010 Location(s): Las Vegas, Nevada Office(s): Energy Efficiency and Renewable Energy, Golden Field Office August 19, 2010 CX-003478: Categorical Exclusion Determination Electrochemical Hydrogen Compressor CX(s) Applied: A9, B3.6 Date: 08/19/2010 Location(s): Danbury, Connecticut Office(s): Energy Efficiency and Renewable Energy, Golden Field Office August 19, 2010 CX-003422: Categorical Exclusion Determination

438

New York | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

7, 2010 7, 2010 CX-003875: Categorical Exclusion Determination Long Island Biofuels Alliance CX(s) Applied: A9, B3.6, B5.1 Date: 09/07/2010 Location(s): Stony Brook, New York Office(s): Energy Efficiency and Renewable Energy, Golden Field Office September 1, 2010 CX-003880: Categorical Exclusion Determination Energy Independent Agri-Business Outreach CX(s) Applied: A9, B5.1 Date: 09/01/2010 Location(s): Cortland County, New York Office(s): Energy Efficiency and Renewable Energy, Golden Field Office August 27, 2010 CX-003663: Categorical Exclusion Determination Oxy-combustion Oxygen Transport Membrane Development CX(s) Applied: B3.6 Date: 08/27/2010 Location(s): Tonawanda, New York Office(s): Fossil Energy, National Energy Technology Laboratory August 26, 2010 CX-003542: Categorical Exclusion Determination

439

Categorical Exclusion (CX) Determinations By Date | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8, 2013 8, 2013 CX-010148: Categorical Exclusion Determination Merritt Radio Station Upgrade CX(s) Applied: B1.19 Date: 04/18/2013 Location(s): Washington Offices(s): Bonneville Power Administration April 18, 2013 CX-010319: Categorical Exclusion Determination General Chemical Support Operations for NHS, HP CX(s) Applied: B3.6 Date: 04/18/2013 Location(s): South Carolina Offices(s): Savannah River Operations Office April 18, 2013 CX-010554: Categorical Exclusion Determination Yale University- Power Generation from Waste Heat with Closed Loop Membrane-Based System CX(s) Applied: B3.6 Date: 04/18/2013 Location(s): Connecticut, Colorado Offices(s): Advanced Research Projects Agency-Energy April 17, 2013 CX-010188: Categorical Exclusion Determination Field Demonstration of a Novel Eco-Friendly Production Enhancement Process

440

FE Categorical Exclusions | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3, 2010 3, 2010 CX-003468: Categorical Exclusion Determination Cyclone Production Tool CX(s) Applied: B3.6 Date: 08/23/2010 Location(s): Chickasha, Oklahoma Office(s): Fossil Energy, National Energy Technology Laboratory August 23, 2010 CX-003462: Categorical Exclusion Determination Visitor's Center Conference Room CX(s) Applied: B1.7, B1.15 Date: 08/23/2010 Location(s): Morgantown,West Virginia Office(s): Fossil Energy, National Energy Technology Laboratory August 23, 2010 CX-003463: Categorical Exclusion Determination Carbon Dioxide Capture by Sub-Ambient Membrane Operation CX(s) Applied: A9, B3.6 Date: 08/23/2010 Location(s): Newark, Delaware Office(s): Fossil Energy, National Energy Technology Laboratory August 23, 2010 CX-003461: Categorical Exclusion Determination Low-Cost Wet Gas Compressor for Stripper Gas Wells

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441

Categorical Exclusion Determinations: National Energy Technology Laboratory  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

August 14, 2013 August 14, 2013 CX-010791: Categorical Exclusion Determination Gulf of Mexico Miocene Carbon Dioxide (CO2) Site Characterization Mega Transect CX(s) Applied: A9, A11 Date: 08/14/2013 Location(s): Texas Offices(s): National Energy Technology Laboratory August 13, 2013 CX-010799: Categorical Exclusion Determination Building 4 Lead Paint Abatement & Repainting CX(s) Applied: B2.1, B2.5 Date: 08/13/2013 Location(s): Oregon Offices(s): National Energy Technology Laboratory August 13, 2013 CX-010800: Categorical Exclusion Determination Hybrid Membrane/Absorption Process for Post-Combustion Carbon Dioxide (CO2) Capture CX(s) Applied: A1, A9, A11, B3.6 Date: 08/13/2013 Location(s): Illinois Offices(s): National Energy Technology Laboratory August 12, 2013 CX-010802: Categorical Exclusion Determination

442

Page not found | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

21 - 3930 of 8,172 results. 21 - 3930 of 8,172 results. Download CX-003616: Categorical Exclusion Determination Energy Efficient Engines CX(s) Applied: A7, B1.31, B5.2 Date: 08/27/2010 Location(s): Racine, Wisconsin Office(s): Energy Efficiency and Renewable Energy, Golden Field Office http://energy.gov/nepa/downloads/cx-003616-categorical-exclusion-determination Download CX-003663: Categorical Exclusion Determination Oxy-combustion Oxygen Transport Membrane Development CX(s) Applied: B3.6 Date: 08/27/2010 Location(s): Tonawanda, New York Office(s): Fossil Energy, National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-003663-categorical-exclusion-determination Download CX-003520: Categorical Exclusion Determination Pontiac High School Geothermal CX(s) Applied: B5.1 Date: 08/26/2010

443

Categorical Exclusion (CX) Determinations By Date | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

September 30, 2010 September 30, 2010 CX-004092: Categorical Exclusion Determination Advanced Energy Efficient Building Technologies for High Performance Hospitals CX(s) Applied: A9 Date: 09/30/2010 Location(s): Seattle, Washington Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory September 30, 2010 CX-004091: Categorical Exclusion Determination Ohio Advanced Transportation Partnership - City of Columbus Compressed Natural Gas Station CX(s) Applied: B5.1 Date: 09/30/2010 Location(s): Columbus, Ohio Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory September 30, 2010 CX-004090: Categorical Exclusion Determination Development of Reaction-Driven Ionic Transport Membranes (ITM) Technology CX(s) Applied: B3.6

444

Page not found | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

31 - 21940 of 31,917 results. 31 - 21940 of 31,917 results. Download CX-008284: Categorical Exclusion Determination E85 (Ethanol) Retail Fueling Infrastructure Installation CX(s) Applied: B5.22 Date: 05/01/2012 Location(s): Florida Offices(s): National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-008284-categorical-exclusion-determination Download CX-008288: Categorical Exclusion Determination Decommissioning of the Appliance Testing and Evaluation Center in Morgantown CX(s) Applied: B3.6 Date: 05/01/2012 Location(s): West Virginia Offices(s): National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-008288-categorical-exclusion-determination Download CX-008289: Categorical Exclusion Determination Scale-Up of Hydrogen Transport Membranes CX(s) Applied: A9

445

Categorical Exclusion Determinations: Golden Field Office | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

January 21, 2010 January 21, 2010 CX-000625: Categorical Exclusion Determination New Membrane Electrode Assemblies Materials for Improved Direct Methanol Fuel Cell Performance, Durability and Cost CX(s) Applied: B3.6 Date: 01/21/2010 Location(s): Florida Office(s): Energy Efficiency and Renewable Energy, Golden Field Office January 21, 2010 CX-000626: Categorical Exclusion Determination Advanced Direct Methanol Fuel Cell for Mobile Computing CX(s) Applied: B3.6 Date: 01/21/2010 Location(s): Florida Office(s): Energy Efficiency and Renewable Energy, Golden Field Office January 21, 2010 CX-000630: Categorical Exclusion Determination A Partnership Model to Build Solar Training Capacity in the Midwest CX(s) Applied: A9, A11 Date: 01/21/2010 Location(s): Colorado Office(s): Energy Efficiency and Renewable Energy, Golden Field Office

446

Categorical Exclusion Determinations: Office of Energy Efficiency and  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

23, 2009 23, 2009 CX-000208: Categorical Exclusion Determination Recovery Act - PEM (Polymer Electrolyte Membrane) Fuel Cell Systems Providing Emergency Reserve and Backup Power CX(s) Applied: B5.1 Date: 11/23/2009 Location(s): Washington Office(s): Energy Efficiency and Renewable Energy, Golden Field Office November 23, 2009 CX-000207: Categorical Exclusion Determination NaSi (Sodium Silicide) and Na-SG (Sodium Silica Gell) Powder Hydrogen Fuel Cells CX(s) Applied: B3.6 Date: 11/23/2009 Location(s): New York Office(s): Energy Efficiency and Renewable Energy, Golden Field Office November 23, 2009 CX-000206: Categorical Exclusion Determination Michigan Biogas Center of Excellence CX(s) Applied: A9, B3.6 Date: 11/23/2009 Location(s): Flint, Michigan Office(s): Energy Efficiency and Renewable Energy, Golden Field Office

447

Categorical Exclusion (CX) Determinations By Date | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5, 2010 5, 2010 CX-003556: Categorical Exclusion Determination Morgantown Site Metering Installation CX(s) Applied: B2.2 Date: 08/25/2010 Location(s): Morgantown, West Virginia Office(s): Fossil Energy, National Energy Technology Laboratory August 25, 2010 CX-003554: Categorical Exclusion Determination Multi-Hybrid Power Vehicles with Durable Proton Exchange Membrane Fuel Cell (PEMFC) and Lithium-Ion Battery CX(s) Applied: B3.6, B5.1 Date: 08/25/2010 Location(s): Athens, Ohio Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory August 25, 2010 CX-003553: Categorical Exclusion Determination Scale-up of Indium Nitride Process and Characterization of Product CX(s) Applied: B3.6 Date: 08/25/2010 Location(s): Bethlehem, Pennsylvania Office(s): Energy Efficiency and Renewable Energy, National Energy

448

District of Columbia | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

November 23, 2009 November 23, 2009 CX-000208: Categorical Exclusion Determination Recovery Act - PEM (Polymer Electrolyte Membrane) Fuel Cell Systems Providing Emergency Reserve and Backup Power CX(s) Applied: B5.1 Date: 11/23/2009 Location(s): Washington Office(s): Energy Efficiency and Renewable Energy, Golden Field Office November 19, 2009 CX-000090: Categorical Exclusion Determination Swinomish Indian Tribal Community Renewable Energy Solar Demonstration (Medical Clinic) CX(s) Applied: B3.6, B5.1 Date: 11/19/2009 Location(s): Washington Office(s): Energy Efficiency and Renewable Energy November 6, 2009 CX-000044: Categorical Exclusion Determination Spokane Tribe of the Spokane Reservation Renewable Energy Technologies (Solar) on Government Buildings CX(s) Applied: B3.6, B5.1

449

Categorical Exclusion Determinations: A11 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

August 13, 2013 August 13, 2013 CX-010800: Categorical Exclusion Determination Hybrid Membrane/Absorption Process for Post-Combustion Carbon Dioxide (CO2) Capture CX(s) Applied: A1, A9, A11, B3.6 Date: 08/13/2013 Location(s): Illinois Offices(s): National Energy Technology Laboratory August 9, 2013 CX-010746: Categorical Exclusion Determination Better Buildings- Commercial Energy Efficiency Solutions, Pre-Packaged Commercial PACE: The BEERE Menu CX(s) Applied: A9, A11, B5.1 Date: 08/09/2013 Location(s): Florida Offices(s): Golden Field Office August 5, 2013 CX-010811: Categorical Exclusion Determination South Louisiana Enhanced Oil Recovery (EOR)/Sequestration Research and Development (R&D) Project CX(s) Applied: A1, A9, A11 Date: 08/05/2013 Location(s): Texas Offices(s): National Energy Technology Laboratory

450

Categorical Exclusion Determinations: New Mexico | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

August 2, 2010 August 2, 2010 CX-004122: Categorical Exclusion Determination Biosafety Level-1 Laboratory in Building 898, Laboratory 1668 - Characterization of Interactions and Flocculation of Cell CX(s) Applied: B3.12 Date: 08/02/2010 Location(s): New Mexico Office(s): Sandia Site Office August 2, 2010 CX-004121: Categorical Exclusion Determination Building 840 Asbestos Characterization and Abatement CX(s) Applied: B1.16 Date: 08/02/2010 Location(s): New Mexico Office(s): Sandia Site Office July 29, 2010 CX-003337: Categorical Exclusion Determination Membrane Technology for Produced Water in Lea County CX(s) Applied: B3.6 Date: 07/29/2010 Location(s): Lea County, New Mexico Office(s): Fossil Energy, National Energy Technology Laboratory July 29, 2010 CX-003336: Categorical Exclusion Determination

451

FE Categorical Exclusions | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1, 2010 1, 2010 CX-001169: Categorical Exclusion Determination Pre-Combustion Carbon Dioxide Capture by a New Dual-Phase Ceramic Carbonate Membrane Reactor CX(s) Applied: B3.6 Date: 03/11/2010 Location(s): Tempe, Arizona Office(s): Fossil Energy, National Energy Technology Laboratory March 10, 2010 CX-001157: Categorical Exclusion Determination Advanced Sensors Development Lab CX(s) Applied: B3.6 Date: 03/10/2010 Location(s): Pittsburgh, Pennsylvania Office(s): Fossil Energy, National Energy Technology Laboratory March 10, 2010 CX-001167: Categorical Exclusion Determination Construction and Operation of Phase and Composition Analysis Facility (PCAF) CX(s) Applied: B3.6 Date: 03/10/2010 Location(s): Pittsburgh, Pennsylvania Office(s): Fossil Energy, National Energy Technology Laboratory

452

Categorical Exclusion Determinations: National Energy Technology Laboratory  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

10, 2010 10, 2010 CX-003879: Categorical Exclusion Determination Recovery Act ? Clean Energy Coalition Michigan Green Fleets CX(s) Applied: A7 Date: 09/10/2010 Location(s): Michigan Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory September 10, 2010 CX-003878: Categorical Exclusion Determination Recovery Act ? Clean Energy Coalition Michigan Green Fleets CX(s) Applied: B5.1 Date: 09/10/2010 Location(s): Melvindale, Michigan Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory September 10, 2010 CX-003877: Categorical Exclusion Determination Hybrid Membrane/Absorption Process for Post-Combustion Carbon Dioxide Capture CX(s) Applied: B3.6 Date: 09/10/2010 Location(s): Des Plaines, Illinois Office(s): Fossil Energy, National Energy Technology Laboratory

453

Categorical Exclusion (CX) Determinations By Date | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

7, 2012 7, 2012 CX-008982: Categorical Exclusion Determination "Sacrificial Protective Coating Materials Regenerated In-Situ to Enable High Performance Membranes CX(s) Applied: A9, B3.6 Date: 08/27/2012 Location(s): California Offices(s): Golden Field Office" August 25, 2012 CX-008918: Categorical Exclusion Determination Remove/Demolish T-20, T-14, T-15, T-29 CX(s) Applied: B1.23 Date: 08/25/2012 Location(s): West Virginia Offices(s): National Energy Technology Laboratory August 24, 2012 CX-009412: Categorical Exclusion Determination 2012 Access Road Maintenance Along the Path 500 Kilovolt Transmission Line CX(s) Applied: B1.3, B1.13 Date: 08/24/2012 Location(s): California, California Offices(s): Western Area Power Administration August 24, 2012 CX-008927: Categorical Exclusion Determination

454

Categorical Exclusion Determinations: Colorado | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

October 21, 2010 October 21, 2010 CX-004299: Categorical Exclusion Determination Tree Cutting Cheyenne Field Office Maintenance Area CX(s) Applied: B1.3 Date: 10/21/2010 Location(s): Larimer, Colorado Office(s): Western Area Power Administration-Rocky Mountain Region October 20, 2010 CX-004268: Categorical Exclusion Determination Scale-Up of Hydrogen Transport Membranes CX(s) Applied: B3.6 Date: 10/20/2010 Location(s): Boulder, Colorado Office(s): Fossil Energy, National Energy Technology Laboratory September 30, 2010 CX-004108: Categorical Exclusion Determination Green Oil: Carbon Dioxide Enhanced Oil Recovery for America?s Small Oil Producers CX(s) Applied: A9, B3.6 Date: 09/30/2010 Location(s): Lakewood, Colorado Office(s): Fossil Energy, National Energy Technology Laboratory

455

Categorical Exclusion Determinations: B3.6 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

13, 2010 13, 2010 CX-003344: Categorical Exclusion Determination Energy Systems Integration Facility Subsurface Exploration Program for Geothermal Potential; National Renewable Energy Laboratory Tracking Number 10-037 CX(s) Applied: A9, B3.1, B3.6 Date: 08/13/2010 Location(s): Golden, Colorado Office(s): Energy Efficiency and Renewable Energy, Golden Field Office August 13, 2010 CX-003342: Categorical Exclusion Determination High Temperature, Low Relative Humidity Polymer-Type Membranes CX(s) Applied: A9, B3.6 Date: 08/13/2010 Location(s): Arizona Office(s): Energy Efficiency and Renewable Energy, Golden Field Office August 13, 2010 CX-004925: Categorical Exclusion Determination Material Methods - Phononic Heat Pump CX(s) Applied: B3.6 Date: 08/13/2010 Location(s): Irvine, California

456

Categorical Exclusion Determinations: Georgia | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

June 17, 2010 June 17, 2010 CX-002739: Categorical Exclusion Determination Renewable Energy Laboratory Development for Biofuels Advanced Combustion CX(s) Applied: B2.2, B3.6, A9, B5.1 Date: 06/17/2010 Location(s): Statesboro, Georgia Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory June 2, 2010 CX-003132: Categorical Exclusion Determination Georgia Institute of Technology Research Corporation - Metal Organic Frameworks in Hollow Fiber Membranes for Carbon Dioxide Capture CX(s) Applied: B3.6 Date: 06/02/2010 Location(s): Georgia Office(s): Advanced Research Projects Agency - Energy May 28, 2010 CX-002514: Categorical Exclusion Determination State Energy Program - Clean Energy Property Rebate Program CX(s) Applied: A9, B5.1 Date: 05/28/2010

457

Categorical Exclusion Determinations: Massachusetts | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

June 2, 2010 June 2, 2010 CX-003107: Categorical Exclusion Determination Harvard Medical School, Wyss Institute - Engineering a Bacterial Reverse Fuel Cell CX(s) Applied: B3.6 Date: 06/02/2010 Location(s): Massachusetts Office(s): Advanced Research Projects Agency - Energy May 28, 2010 CX-002457: Categorical Exclusion Determination Development of Novel Non-Platinum Group Metal Electrocatalysts for Polymer Electrolyte Membrane Fuel Cell Applications CX(s) Applied: B3.6 Date: 05/28/2010 Location(s): Massachusetts Office(s): Energy Efficiency and Renewable Energy, Golden Field Office May 24, 2010 CX-002405: Categorical Exclusion Determination Fluid Flow Optimization of Aerogel Blanket Manufacturing Process CX(s) Applied: B3.6, B5.1 Date: 05/24/2010 Location(s): Massachusetts Office(s): Energy Efficiency and Renewable Energy, Golden Field Office

458

Categorical Exclusion Determinations: Advanced Research Projects  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

June 2, 2010 June 2, 2010 CX-003144: Categorical Exclusion Determination ATK - A High Efficiency Inertial Carbon Dioxide Extraction System CX(s) Applied: B3.6 Date: 06/02/2010 Location(s): New York Office(s): Advanced Research Projects Agency - Energy June 2, 2010 CX-003132: Categorical Exclusion Determination Georgia Institute of Technology Research Corporation - Metal Organic Frameworks in Hollow Fiber Membranes for Carbon Dioxide Capture CX(s) Applied: B3.6 Date: 06/02/2010 Location(s): Georgia Office(s): Advanced Research Projects Agency - Energy June 2, 2010 CX-003131: Categorical Exclusion Determination Lawrence Berkeley National Laboratory & Wildcat Disc. Technology - High Throughput Tools to Screen New Metal Organic Framework Materials CX(s) Applied: B3.6 Date: 06/02/2010

459

California | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5, 2009 5, 2009 CX-000591: Categorical Exclusion Determination 25A2936 - Carbon Nanotube Membranes for Energy-Efficient Carbon Sequestration CX(s) Applied: B3.6 Date: 12/15/2009 Location(s): California Office(s): Advanced Research Projects Agency - Energy December 15, 2009 CX-000235: Categorical Exclusion Determination California City Fresno CX(s) Applied: A9, A11, B5.1 Date: 12/15/2009 Location(s): Fresno, California Office(s): Energy Efficiency and Renewable Energy, Golden Field Office December 14, 2009 CX-001247: Categorical Exclusion Determination Biodiesel Tank Installation, Solar Installations, and Home Upgrades CX(s) Applied: A1, A9, A11, B3.6, B5.1 Date: 12/14/2009 Location(s): Chula Vista, California Office(s): Energy Efficiency and Renewable Energy December 14, 2009

460

FE Categorical Exclusions | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

20, 2010 20, 2010 CX-004268: Categorical Exclusion Determination Scale-Up of Hydrogen Transport Membranes CX(s) Applied: B3.6 Date: 10/20/2010 Location(s): Boulder, Colorado Office(s): Fossil Energy, National Energy Technology Laboratory October 19, 2010 CX-004274: Categorical Exclusion Determination Soil Amendment Product for Oilfield Brine Contaminated Soil ? Field Testing Part II CX(s) Applied: B3.7 Date: 10/19/2010 Location(s): Blackwell, Oklahoma Office(s): Fossil Energy, National Energy Technology Laboratory October 19, 2010 CX-004277: Categorical Exclusion Determination Characterization of the Triassic Newark Basin of New York and New Jersey for Geologic Storage of Carbon Dioxide CX(s) Applied: A9 Date: 10/19/2010 Location(s): Clarkstown, New York Office(s): Fossil Energy, National Energy Technology Laboratory

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Novel membrane technology for green ethylene production.  

SciTech Connect

Ethylene is currently produced by pyrolysis of ethane in the presence of steam. This reaction requires substantial energy input, and the equilibrium conversion is thermodynamically limited. The reaction also produces significant amounts of greenhouse gases (CO and CO{sub 2}) because of the direct contact between carbon and steam. Argonne has demonstrated a new way to make ethylene via ethane dehydrogenation using a dense hydrogen transport membrane (HTM) to drive the unfavorable equilibrium conversion. Preliminary experiments show that the new approach can produce ethylene yields well above existing pyrolysis technology and also significantly above the thermodynamic equilibrium limit, while completely eliminating the production of greenhouse gases. With Argonne's approach, a disk-type dense ceramic/metal composite (cermet) membrane is used to produce ethylene by dehydrogenation of ethane at 850 C. The gas-transport membrane reactor combines a reversible chemical reaction with selective separation of one product species and leads to increased reactant conversion to the desired product. In an experiment ethane was passed over one side of the HTM membrane and air over the other side. The hydrogen produced by the dehydrogenation of ethane was removed and transported through the HTM to the air side. The air provided the driving force required for the transport of hydrogen through the HTM. The reaction between transported hydrogen and oxygen in air can provide the energy needed for the dehydrogenation reaction. At 850 C and 1-atm pressure, equilibrium conversion of ethane normally limits the ethylene yield to 64%, but Argonne has shown that an ethylene yield of 69% with a selectivity of 88% can be obtained under the same conditions. Coking was not a problem in runs extending over several weeks. Further improved HTM materials will lower the temperature required for high conversion at a reasonable residence time, while the lower temperature will suppress unwanted side reactions and prolong membrane life. With the Argonne approach, oxygen does not contact the ethane/ethylene stream, so oxidation products are not formed. Consequently, higher selectivity to ethylene and fewer by-products can be achieved. Some benefits are: (1) Simplifies overall product purification and processing schemes; (2) Results in greater energy efficiency; (3) Completely eliminates greenhouse gases from the reactor section; and (4) Lowers the cost of the 'back end' purification train, which accounts for about 70% of the capital cost of a conventional ethylene production unit.

Balachandran, U.; Lee, T. H.; Dorris, S. E.; Udovich, C. A.; Scouten, C. G.; Marshall, C. L. (Energy Systems); ( CSE)

2008-01-01T23:59:59.000Z

462

ATP-binding cassette-like transporters are involved in the transport of lignin precursors across plasma and vacuolar membranes  

SciTech Connect

Lignin is a complex biopolymer derived primarily from the condensation of three monomeric precursors, the monolignols. The synthesis of monolignols occurs in the cytoplasm. To reach the cell wall where they are oxidized and polymerized, they must be transported across the cell membrane. However, the molecular mechanisms underlying the transport process are unclear. There are conflicting views about whether the transport of these precursors occurs by passive diffusion or is an energized active process; further, we know little about what chemical forms are required. Using isolated plasma and vacuolar membrane vesicles prepared from Arabidopsis, together with applying different transporter inhibitors in the assays, we examined the uptake of monolignols and their derivatives by these native membrane vesicles. We demonstrate that the transport of lignin precursors across plasmalemma and their sequestration into vacuoles are ATP-dependent primary-transport processes, involving ATP-binding cassette-like transporters. Moreover, we show that both plasma and vacuolar membrane vesicles selectively transport different forms of lignin precursors. In the presence of ATP, the inverted plasma membrane vesicles preferentially take up monolignol aglycones, whereas the vacuolar vesicles are more specific for glucoconjugates, suggesting that the different ATP-binding cassette-like transporters recognize different chemical forms in conveying them to distinct sites, and that glucosylation of monolignols is necessary for their vacuolar storage but not required for direct transport into the cell wall in Arabidopsis.

Miao, Y.C.; Liu, C.

2010-12-28T23:59:59.000Z

463

Treatment of model inland brackish groundwater reverse osmosis concentrate with electrodialysis — Part II: Sensitivity to voltage application and membranes  

Science Journals Connector (OSTI)

Abstract The objective of this research was to investigate the sensitivity of electrodialysis performance to variations in voltage application and membranes when treating brackish water reverse osmosis concentrate waste. Synthetic BWRO concentrates from Arizona and Texas of 7890–14,800 mg/L total dissolved solids were prepared with poly-phosphonate antiscalants. Experimentation was performed using a laboratory-scale electrodialyzer with two sets of membranes (AMV-CMV and PCSA-PCSK) with a nominal transfer area of 64 cm2 per membrane. Flow, pressure, conductivity, temperature, and pH were measured continuously, and periodic samples were analyzed for specific anion and cation concentrations. The BWRO concentrates were successfully treated with stack voltage applications of 0.5–1.5 V/cell-pair for salinity removal ratios up to 99% with current density less than 500 A/m2. This paper highlights that (1) the specific energy consumption was proportional to the applied voltage and equivalent concentration separated (i.e., approximately 0.03 kW h/m3 per Volt/cell-pair applied per meq/L separated); (2) lower voltage applications decreased the relative separation rate of sulfate compared to chloride; and (3) water transport by electro-osmosis was independent of voltage application or resulting current densities, while it is affected by the ion exchange membranes.

W. Shane Walker; Younggy Kim; Desmond F. Lawler

2014-01-01T23:59:59.000Z

464

NETL: Gasification - Advanced Hydrogen Transport Membranes for Coal  

NLE Websites -- All DOE Office Websites (Extended Search)

Syngas Processing Systems Syngas Processing Systems Advanced Hydrogen Transport Membranes for Coal Gasification Praxair Inc. Project Number: FE0004908 Project Description Praxair is conducting research to develop hydrogen transport membrane (HTM) technology to separate carbon dioxide (CO2) and hydrogen (H2) in coal-derived syngas for IGCC applications. The project team has fabricated palladium based membranes and measured hydrogen fluxes as a function of pressure, temperature, and membrane preparation conditions. Membranes are a commercially-available technology in the chemical industry for CO2 removal and H2 purification. There is, however, no commercial application of membrane processes that aims at CO2 capture for IGCC syngas. Due to the modular nature of the membrane process, the design does not exhibit economy of scale-the cost of the system will increase linearly as the plant system scale increases making the use of commercially available membranes, for an IGCC power plant, cost prohibitive. For a membrane process to be a viable CO2 capture technology for IGCC applications, a better overall performance is required, including higher permeability, higher selectivity, and lower membrane cost.

465

Chapter 9 - Nanotechnology-Based Membranes for Water Purification  

Science Journals Connector (OSTI)

Herein we present a critical review of nanotechnology-enabled materials touted as low-energy replacements for conventional reverse osmosis (RO) membranes in desalination and water reuse applications. Zeolite coatings promise a highly selective material that have the chemical, thermal, and mechanical stabilities of conventional ceramic membranes. Nanocomposite membranes exhibit up to three times higher permeability than current commercial polymeric membranes, with no change in salt rejection, and can be fabricated with antimicrobial and photoreactive functionalities. Biomimetic membranes can produce highly selective membranes potentially useful in both forward osmosis and RO applications. Aquaporin (AQP)-based lipid bilayer vesicles exhibit nearly 100 times higher water permeability than commercial membranes with near perfect salt rejection. Carbon nanotube (CNT)- and graphene-based membranes (theoretically) exhibit acceptable salt rejections with water permeabilities between 5 and 1000 times higher than commercial membranes. Self-assembled block copolymer membranes represent a fully polymeric approach to forming highly selective structures reminiscent of AQP- or CNT-based materials.

Eric M.V. Hoek; Mary Theresa M. Pendergast; Asim K. Ghosh

2014-01-01T23:59:59.000Z

466

Interfacial Water-Transport Effects in Proton-Exchange Membranes  

SciTech Connect

It is well known that the proton-exchange membrane is perhaps the most critical component of a polymer-electrolyte fuel cell. Typical membranes, such as Nafion(R), require hydration to conduct efficiently and are instrumental in cell water management. Recently, evidence has been shown that these membranes might have different interfacial morphology and transport properties than in the bulk. In this paper, experimental data combined with theoretical simulations will be presented that explore the existence and impact of interfacial resistance on water transport for Nafion(R) 21x membranes. A mass-transfer coefficient for the interfacial resistance is calculated from experimental data using different permeation cells. This coefficient is shown to depend exponentially on relative humidity or water activity. The interfacial resistance does not seem to exist for liquid/membrane or membrane/membrane interfaces. The effect of the interfacial resistance is to flatten the water-content profiles within the membrane during operation. Under typical operating conditions, the resistance is on par with the water-transport resistance of the bulk membrane. Thus, the interfacial resistance can be dominant especially in thin, dry membranes and can affect overall fuel-cell performance.

Kienitz, Brian; Yamada, Haruhiko; Nonoyama, Nobuaki; Weber, Adam

2009-11-19T23:59:59.000Z

467

CO2-selective, Hybrid Membranes by Silation of Alumina  

SciTech Connect

Hybrid membranes are feasible candidates for the separation of CO2 from gas produced in coal-based power generation since they have the potential to combine the high selectivity of polymer membranes and the high permeability of inorganic membranes. An interesting method for producing hybrid membranes is the silation of an inorganic membrane. In this method, trichloro- or alkoxy-silanes interact with hydroxyl groups on the surface of ?-AlO3 or TiO2, binding organic groups to that surface. By varying the length of these organic groups on the organosilane, it should be possible to tailor the effective pore size of the membrane. Similarly, the addition of “CO2-phillic” groups to the silating agent allows for the careful control of surface affinity and the enhancement of surface diffusion mechanisms. This method of producing hybrid membranes selective to CO2 was first attempted by Hyun [1] who silated TiO2 with phenyltriethoxysilane. Later, Way [2] silated ?-AlO3 with octadecyltrichlorosilane. Both researchers were successful in producing membranes with improved selectivity toward CO2, but permeability was not maintained at a commercially applicable level. XPS data indicated that the silating agent did not penetrate into the membrane pores and separation actually occurred in a thin “polymer-like” surface layer. The present study attempts to overcome the mass transfer problems associated with this technique by producing the desired monolayer coverage of silane, and thus develop a highly-permeable CO2-selective hybrid membrane.

Luebke, D.R.; Pennline, H.W.

2007-09-01T23:59:59.000Z

468

Role of the Specific Amino Acid Sequence of the Membrane-Spanning Domain of Human Immunodeficiency Virus Type 1 in Membrane Fusion  

Science Journals Connector (OSTI)

...Human Immunodeficiency Virus Type 1 in Membrane Fusion Kosuke Miyauchi 1 Jun Komano...particularly in membrane fusion, by making two types of MSD mutants: (i) glycine...human immunodeficiency virus type 1 in membrane fusion. | Fusion between cell...

Kosuke Miyauchi; Jun Komano; Yoshiyuki Yokomaku; Wataru Sugiura; Naoki Yamamoto; Zene Matsuda

2005-04-01T23:59:59.000Z

469

Development of novel nano-composite membranes as introduction systems for mass spectrometers: Contrasting nano-composite membranes and conventional inlet systems.  

E-Print Network (OSTI)

??This dissertation presents the development of novel nano-composite membranes as introduction systems for mass spectrometers. These nano-composite membranes incorporate anodic aluminum oxide (AAO) membranes as… (more)

Miranda, Luis

2013-01-01T23:59:59.000Z

470

High-Resolution 2D NMR Spectroscopy of Bicelles To Measure the Membrane Interaction of Ligands  

Science Journals Connector (OSTI)

Since dipolar couplings correspond to local magnetic fields in the molecule, this class of experiments is referred to as separated local field (SLF) spectroscopy. ... There are several experimental protocols for SLF spectroscopy which differ in the details of the preparation and evolution periods, while in all cases the 13C signal is observed during the detection period t2 as it evolves under the 13C chemical shift interaction and in the presence of 1H decoupling. ... These results are directly transferable to 2D SLF studies of 15N nuclei, where they are typically applied for structural measurements on uniformly 15N labeled membrane proteins. ...

Sergey V. Dvinskikh; Ulrich H. N. Dürr; Kazutoshi Yamamoto; Ayyalusamy Ramamoorthy

2007-01-05T23:59:59.000Z

471

Fuel Cell Technologies Office: High Temperature Membrane Working Group  

NLE Websites -- All DOE Office Websites (Extended Search)

High Temperature Membrane Working Group High Temperature Membrane Working Group The High Temperature Membrane Working Group consists of government, industry, and university researchers interested in developing high temperature membranes for fuel cells. Description Technical Targets Meetings Contacts Description Polymer electrolyte membrane (PEM) fuel cells typically operate at temperatures no higher than 60°C-80°C due to structural limitations of the membrane. Operating PEM fuel cell stacks at higher temperatures (120°C for transportation and 150°C for stationary applications), however, would yield significant energy benefits. For example, heat rejection is easier at higher temperatures, which would allow use of smaller heat exchangers in fuel cell power systems. In addition, for reformate fuel cell systems, carbon monoxide (CO) tolerance of the stack is less problematic at higher temperatures, which would reduce the size requirements or possibly eliminate the need for some CO clean-up beds in the fuel processor.

472

Fuel Cell Technologies Office: 2005 High Temperature Membrane Working Group  

NLE Websites -- All DOE Office Websites (Extended Search)

About About Printable Version Share this resource Send a link to Fuel Cell Technologies Office: 2005 High Temperature Membrane Working Group Meeting Archives to someone by E-mail Share Fuel Cell Technologies Office: 2005 High Temperature Membrane Working Group Meeting Archives on Facebook Tweet about Fuel Cell Technologies Office: 2005 High Temperature Membrane Working Group Meeting Archives on Twitter Bookmark Fuel Cell Technologies Office: 2005 High Temperature Membrane Working Group Meeting Archives on Google Bookmark Fuel Cell Technologies Office: 2005 High Temperature Membrane Working Group Meeting Archives on Delicious Rank Fuel Cell Technologies Office: 2005 High Temperature Membrane Working Group Meeting Archives on Digg Find More places to share Fuel Cell Technologies Office: 2005 High

473

Argonne CNM News: Thinnest Nanofiltration Membrane to Date  

NLE Websites -- All DOE Office Websites (Extended Search)

Thinnest Nanofiltration Membrane to Date Thinnest Nanofiltration Membrane to Date Thinnest membrane to date Close-packed nanoparticle monolayers self-assembled from dodecanethiol-ligated gold nanocrystals. TEM image (left) and atomistic simulation of tryptophan transport through a pore. A recent collaboration between users at the University of Chicago and the University of Illinois at Chicago with the Center for Nanoscale Material's Electronic & Magnetic Materials & Devices Group has produced the thinnest nanofiltration membrane achieved thus far, at ~30 nm, made of just four layers of nanoparticles. A separation membrane is a key component in both nanofiltration and reverse osmosis filtration systems. Typically they are microns-thick polymer films. Reducing the thickness of the membrane reduces the pressure that needs to

474

Fuel Cell Technologies Office: 2004 High Temperature Membrane Working Group  

NLE Websites -- All DOE Office Websites (Extended Search)

About About Printable Version Share this resource Send a link to Fuel Cell Technologies Office: 2004 High Temperature Membrane Working Group Meeting Archives to someone by E-mail Share Fuel Cell Technologies Office: 2004 High Temperature Membrane Working Group Meeting Archives on Facebook Tweet about Fuel Cell Technologies Office: 2004 High Temperature Membrane Working Group Meeting Archives on Twitter Bookmark Fuel Cell Technologies Office: 2004 High Temperature Membrane Working Group Meeting Archives on Google Bookmark Fuel Cell Technologies Office: 2004 High Temperature Membrane Working Group Meeting Archives on Delicious Rank Fuel Cell Technologies Office: 2004 High Temperature Membrane Working Group Meeting Archives on Digg Find More places to share Fuel Cell Technologies Office: 2004 High

475

Fuel Cell Technologies Office: 2010 High Temperature Membrane Working Group  

NLE Websites -- All DOE Office Websites (Extended Search)

About About Printable Version Share this resource Send a link to Fuel Cell Technologies Office: 2010 High Temperature Membrane Working Group Meeting Archives to someone by E-mail Share Fuel Cell Technologies Office: 2010 High Temperature Membrane Working Group Meeting Archives on Facebook Tweet about Fuel Cell Technologies Office: 2010 High Temperature Membrane Working Group Meeting Archives on Twitter Bookmark Fuel Cell Technologies Office: 2010 High Temperature Membrane Working Group Meeting Archives on Google Bookmark Fuel Cell Technologies Office: 2010 High Temperature Membrane Working Group Meeting Archives on Delicious Rank Fuel Cell Technologies Office: 2010 High Temperature Membrane Working Group Meeting Archives on Digg Find More places to share Fuel Cell Technologies Office: 2010 High

476

Fuel Cell Technologies Office: 2007 High Temperature Membrane Working Group  

NLE Websites -- All DOE Office Websites (Extended Search)

About About Printable Version Share this resource Send a link to Fuel Cell Technologies Office: 2007 High Temperature Membrane Working Group Meeting Archives to someone by E-mail Share Fuel Cell Technologies Office: 2007 High Temperature Membrane Working Group Meeting Archives on Facebook Tweet about Fuel Cell Technologies Office: 2007 High Temperature Membrane Working Group Meeting Archives on Twitter Bookmark Fuel Cell Technologies Office: 2007 High Temperature Membrane Working Group Meeting Archives on Google Bookmark Fuel Cell Technologies Office: 2007 High Temperature Membrane Working Group Meeting Archives on Delicious Rank Fuel Cell Technologies Office: 2007 High Temperature Membrane Working Group Meeting Archives on Digg Find More places to share Fuel Cell Technologies Office: 2007 High

477

Membrane-based carbon capture from flue gas: A review  

Science Journals Connector (OSTI)

Abstract There has been an increasing interest in the application of membranes to flue gas separation, primarily driven by the need of carbon capture for significantly reducing greenhouse gas emissions. Historically, there has not been general consensus about the advantage of membranes against other methods such as liquid solvents for carbon capture. However, recent research indicates that advances in materials and process designs could significantly improve the separation performance of membrane capture systems, which make membrane technology competitive with other technologies for carbon capture. This paper mainly reviews membrane separation for the application to post-combustion CO2 capture with a focus on the developments and breakthroughs in membrane material design, process engineering, and engineering economics.

Rajab Khalilpour; Kathryn Mumford; Haibo Zhai; Ali Abbas; Geoff Stevens; Edward S. Rubin

2014-01-01T23:59:59.000Z

478

Membranes for nanometer-scale mass fast transport  

DOE Patents (OSTI)

Nanoporous membranes comprising single walled, double walled, and multiwalled carbon nanotubes embedded in a matrix material were fabricated for fluid mechanics and mass transfer studies on the nanometer scale and commercial applications. Average pore size can be 2 nm to 20 nm, or seven nm or less, or two nanometers or less. The membrane can be free of large voids spanning the membrane such that transport of material such as gas or liquid occurs exclusively through the tubes. Fast fluid, vapor, and liquid transport are observed. Versatile micromachining methods can be used for membrane fabrication. A single chip can comprise multiple membranes. These membranes are a robust platform for the study of confined molecular transport, with applications in liquid and gas separations and chemical sensing including desalination, dialysis, and fabric formation.

Bakajin, Olgica (San Leandro, CA); Holt, Jason (Berkeley, CA); Noy, Aleksandr (Belmont, CA); Park, Hyung Gyu (Oakland, CA)

2011-10-18T23:59:59.000Z

479

Active membrane having uniform physico-chemically functionalized ion channels  

DOE Patents (OSTI)

The present invention relates to a physicochemically-active porous membrane for electrochemical cells that purports dual functions: an electronic insulator (separator) and a unidirectional ion-transporter (electrolyte). The electrochemical cell membrane is activated for the transport of ions by contiguous ion coordination sites on the interior two-dimensional surfaces of the trans-membrane unidirectional pores. One dimension of the pore surface has a macroscopic length (1 nm-1000 .mu.m) and is directed parallel to the direction of an electric field, which is produced between the cathode and the anode electrodes of an electrochemical cell. The membrane material is designed to have physicochemical interaction with ions. Control of the extent of the interactions between the ions and the interior pore walls of the membrane and other materials, chemicals, or structures contained within the pores provides adjustability of the ionic conductivity of the membrane.

Gerald, II, Rex E; Ruscic, Katarina J; Sears, Devin N; Smith, Luis J; Klingler, Robert J; Rathke, Jerome W

2012-09-24T23:59:59.000Z

480

Nanostructured Silicon Membranes for Control of Molecular Transport  

SciTech Connect

A membrane that allows selective transport of molecular species requires precise engineering on the nanoscale. Membrane permeability can be tuned by controlling the physical structure of the pores. Here, a combination of electron-beam and optical lithography, along with cryogenic deep reactive ion etching, has been used to fabricate silicon membranes that are physically robust, have uniform pore-sizes, and are directly integrated into a microfluidic network. Additional reductions in pore size were achieved using plasma enhanced chemical vapor deposition of silicon dioxide to coat membrane surfaces. Cross sectioning of the membranes using focused ion beam milling was used to determine the physical shape of the membrane pores before and after coating.

Srijanto, Bernadeta R [ORNL] [ORNL; Retterer, Scott T [ORNL] [ORNL; Fowlkes, Jason Davidson [ORNL] [ORNL; Doktycz, Mitchel John [ORNL] [ORNL

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "membranes cxs applied" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Advances in ion transport membrane technology for Syngas production  

Science Journals Connector (OSTI)

Abstract Ceramic, ion transport membranes for the production of Syngas (ITM Syngas) produce high pressure synthesis gas in a single unit operation from low pressure air and pre-reformed natural gas. Oxygen transport through ITM Syngas membranes occurs through a series of processes, including solid phase oxygen anion diffusion through the dense membrane and surface reactions on the air and reducing sides of the membrane. This paper focuses on the effect of adding porous layers to the syngas side or both sides of the membrane to increase the available surface area for the surface reactions. The highest fluxes are achieved by increasing the surface area on both sides of the membrane, indicating that both surface reactions are a significant resistance to oxygen transport.

C.F. Miller; Jack Chen; M.F. Carolan; E.P. Foster

2014-01-01T23:59:59.000Z

482

Silica membranes for hydrogen separation from coal gas. Final report  

SciTech Connect

This project is a continuation of a previous DOE-UCR project (DE-FG22- 89PC89765) dealing with the preparation of silica membranes highly permselective to hydrogen at elevated temperatures, suitable for hydrogen separation from coal gas. The membranes prepared in the previous project had very high selectivity but relatively low permeance. Therefore, the general objectives of this project were to improve the permeance of these membranes and to obtain fundamental information about membrane structure and properties. The specific objectives were: (1) to explore new silylation reagents and reaction conditions with the purpose of reducing the thickness and increasing the permeance of silica membranes prepared by chemical vapor deposition (CVD), (2) to characterize the membrane structure, (3) to delineate mechanism and kinetics of deposition, (4) to measure the permeability of silica layers at different extents of deposition, and (5) to mathematically model the relationship between structure and deposition kinetics.

Gavalas, G.R.

1996-01-01T23:59:59.000Z

483

Domestic wastewater treatment with membrane filtration—two years experience  

Science Journals Connector (OSTI)

This study tested domestic wastewater treatment membrane filtration without external cleaning in sustained long term operation. Domestic wastewater treatment plant monitoring was performed at the municipal wastewater treatment plant Devínska Nová Ves, Bratislava between February 2005 and July 2007. Two membrane modules were tested by immersion in the domestic wastewater treatment plant. The flat sheet membrane module was operated without external cleaning at a flux of 20–60 L/m2 h for 6 months. The hollow fiber membrane module was operated for 4 months without external cleaning with a flux of 20–45 L/m2 h. Parallel operation of flat sheet and hollow fiber membrane modules showed similar results in effluent water quality. Both membrane modules were able to effectively remove organic matter (as much as 91%) and more than 97% of NH4+?N. Nitrogen removal via denitrification was observed during the short periods with low oxygen concentration. Treated water contained suspended solids under measurable limits.

A. Blšt’áková; I. Bodík; L. Dan?ová; Z. Jakub?ová

2009-01-01T23:59:59.000Z

484

Membrane separation of hydrocarbons using cycloparaffinic solvents  

DOE Patents (OSTI)

Heavy crude oils which contain metal contaminants such as nickel, vanadium and iron may be separated from light hydrocarbon oils by passing a solution of the crude oil dissolved in a cycloparaffinic hydrocarbon solvent containing from about 5 to about 8 carbon atoms by passing through a polymeric membrane which is capable of maintaining its integrity in the presence of hydrocarbon compounds. The light hydrocarbon oils which possess relatively low molecular weights will be recovered as the permeate while the heavy oils which possess relatively high molecular weights as well as the metal contaminants will be recovered as the retentate.

Kulkarni, S.S.; Chang, Y.A.; Gatsis, J.G.; Funk, E.W.

1988-06-14T23:59:59.000Z

485

Membrane Purification Cell for Aluminum Recycling  

SciTech Connect

Recycling mixed aluminum scrap usually requires adding primary aluminum to the scrap stream as a diluent to reduce the concentration of non-aluminum constituents used in aluminum alloys. Since primary aluminum production requires approximately 10 times more energy than melting scrap, the bulk of the energy and carbon dioxide emissions for recycling are associated with using primary aluminum as a diluent. Eliminating the need for using primary aluminum as a diluent would dramatically reduce energy requirements, decrease carbon dioxide emissions, and increase scrap utilization in recycling. Electrorefining can be used to extract pure aluminum from mixed scrap. Some example applications include producing primary grade aluminum from specific scrap streams such as consumer packaging and mixed alloy saw chips, and recycling multi-alloy products such as brazing sheet. Electrorefining can also be used to extract valuable alloying elements such as Li from Al-Li mixed scrap. This project was aimed at developing an electrorefining process for purifying aluminum to reduce energy consumption and emissions by 75% compared to conventional technology. An electrolytic molten aluminum purification process, utilizing a horizontal membrane cell anode, was designed, constructed, operated and validated. The electrorefining technology could also be used to produce ultra-high purity aluminum for advanced materials applications. The technical objectives for this project were to: - Validate the membrane cell concept with a lab-scale electrorefining cell; - Determine if previously identified voltage increase issue for chloride electrolytes holds for a fluoride-based electrolyte system; - Assess the probability that voltage change issues can be solved; and - Conduct a market and economic analysis to assess commercial feasibility. The process was tested using three different binary alloy compositions (Al-2.0 wt.% Cu, Al-4.7 wt.% Si, Al-0.6 wt.% Fe) and a brazing sheet scrap composition (Al-2.8 wt.% Si-0.7 wt.% Fe-0.8 wt.% Mn),. Purification factors (defined as the initial impurity concentration divided by the final impurity concentration) of greater than 20 were achieved for silicon, iron, copper, and manganese. Cell performance was measured using its current and voltage characteristics and composition analysis of the anode, cathode, and electrolytes. The various cells were autopsied as part of the study. Three electrolyte systems tested were: LiCl-10 wt. % AlCl3, LiCl-10 wt. % AlCl3-5 wt.% AlF3 and LiF-10 wt.% AlF3. An extended four-day run with the LiCl-10 wt.% AlCl3-5 wt.% AlF3 electrolyte system was stable for the entire duration of the experiment, running at energy requirements about one third of the Hoopes and the conventional Hall-Heroult process. Three different anode membranes were investigated with respect to their purification performance and survivability: a woven graphite cloth with 0.05 cm nominal thickness & > 90 % porosity, a drilled rigid membrane with nominal porosity of 33%, and another drilled rigid graphite membrane with increased thickness. The latter rigid drilled graphite was selected as the most promising membrane design. The economic viability of the membrane cell to purify scrap is sensitive to primary & scrap aluminum prices, and the cost of electricity. In particular, it is sensitive to the differential between scrap and primary aluminum price which is highly variable and dependent on the scrap source. In order to be economically viable, any scrap post-processing technology in the U.S. market must have a total operating cost well below the scrap price differential of $0.20-$0.40 per lb to the London Metal Exchange (LME), a margin of 65%-85% of the LME price. The cost to operate the membrane cell is estimated to be < $0.24/lb of purified aluminum. The energy cost is estimated to be $0.05/lb of purified aluminum with the remaining costs being repair and maintenance, electrolyte, labor, taxes and depreciation. The bench-scale work on membrane purification cell process has demonstrated technological advantages and subs

David DeYoung; James Wiswall; Cong Wang

2011-11-29T23:59:59.000Z

486

Ion transport through cell membrane channels  

E-Print Network (OSTI)

We discuss various models of ion transport through cell membrane channels. Recent experimental data shows that sizes of ion channels are compared to those of ions and that only few ions may be simultaneously in any single channel. Theoretical description of ion transport in such channels should therefore take into account interactions between ions and between ions and channel proteins. This is not satisfied by macroscopic continuum models based on Poisson-Nernst-Planck equations. More realistic descriptions of ion transport are offered by microscopic Brownian and molecular dynamics. One should also take into account a dynamical character of the channel structure. This is not yet addressed in the literature

Jan Gomulkiewicz; Jacek Miekisz; Stanislaw Miekisz

2007-06-05T23:59:59.000Z

487

Inverted catenoids, curvature singularities and tethered membranes  

E-Print Network (OSTI)

If a catenoid is inverted in any interior point, a deflated compact geometry is obtained which touches at two points (its poles). The catenoid is a minimal surface and, as such, is an equilibrium shape of a symmetric fluid membrane. The conformal symmetry of the Hamiltonian implies that inverted minimal surfaces are also equilibrium shapes. However, they exhibit curvature singularities at their poles. These singularities are associated with external forces pulling the poles together. Unlike the catenoid which is free of stress, there will be stress within the inverted shapes. If the surface area is fixed, reducing the external force induces a transition from a discocyte to a cup-shaped stomatocyte.

Pavel Castro-Villarreal; Jemal Guven

2007-02-14T23:59:59.000Z

488

Spreadsheet Based Scaling Calculations and Membrane Performance  

SciTech Connect

Many membrane element manufacturers provide a computer program to aid buyers in the use of their elements. However, to date there are few examples of fully integrated public domain software available for calculating reverse osmosis and nanofiltration system performance. The Total Flux and Scaling Program (TFSP), written for Excel 97 and above, provides designers and operators new tools to predict membrane system performance, including scaling and fouling parameters, for a wide variety of membrane system configurations and feedwaters. The TFSP development was funded under EPA contract 9C-R193-NTSX. It is freely downloadable at www.reverseosmosis.com/download/TFSP.zip. TFSP includes detailed calculations of reverse osmosis and nanofiltration system performance. Of special significance, the program provides scaling calculations for mineral species not normally addressed in commercial programs, including aluminum, iron, and phosphate species. In addition, ASTM calculations for common species such as calcium sulfate (CaSO{sub 4}{times}2H{sub 2}O), BaSO{sub 4}, SrSO{sub 4}, SiO{sub 2}, and LSI are also provided. Scaling calculations in commercial membrane design programs are normally limited to the common minerals and typically follow basic ASTM methods, which are for the most part graphical approaches adapted to curves. In TFSP, the scaling calculations for the less common minerals use subsets of the USGS PHREEQE and WATEQ4F databases and use the same general calculational approach as PHREEQE and WATEQ4F. The activities of ion complexes are calculated iteratively. Complexes that are unlikely to form in significant concentration were eliminated to simplify the calculations. The calculation provides the distribution of ions and ion complexes that is used to calculate an effective ion product ''Q.'' The effective ion product is then compared to temperature adjusted solubility products (Ksp's) of solids in order to calculate a Saturation Index (SI) for each solid of interest. The SI is expressed as a log value (log(Q) - log(Ksp)) where positive values indicate potential scaling conditions. As this is an unprotected spreadsheet, the methodology is plainly visible to and readily modified by the user.

Wolfe, T D; Bourcier, W L; Speth, T F

2000-12-28T23:59:59.000Z

489

High Efficiency Solar Integrated Roof Membrane Product  

SciTech Connect

This project was designed to address the Solar Energy Technology Program objective, to develop new methods to integrate photovoltaic (PV) cells or modules within a building-integrated photovoltaic (BIPV) application that will result in lower installed cost as well as higher efficiencies of the encapsulated/embedded PV module. The technology assessment and development focused on the evaluation and identification of manufacturing technologies and equipment capable of producing such low-cost, high-efficiency, flexible BIPV solar cells on single-ply roofing membranes.

Partyka, Eric; Shenoy, Anil

2013-05-15T23:59:59.000Z

490

Design of a Composite Membrane with Patches  

SciTech Connect

This paper is concerned with minimization and maximization problems of eigenvalues. The principal eigenvalue of a differential operator is minimized or maximized over a set which is formed by intersecting a rearrangement class with an affine subspace of finite co-dimension. A solution represents an optimal design of a 2-dimensional composite membrane {Omega}, fixed at the boundary, built out of two different materials, where certain prescribed regions (patches) in {Omega} are occupied by both materials. We prove existence results, and present some features of optimal solutions. The special case of one patch is treated in detail.

Cuccu, Fabrizio, E-mail: fcuccu@unica.i [University of Cagliari, Dipartimento di Matematica e Informatica (Italy); Emamizadeh, Behrouz, E-mail: bemamizadeh@pi.ac.a [Petroleum Institute, Department of Mathematics (United Arab Emirates); Porru, Giovanni, E-mail: porru@unica.i [University of Cagliari, Dipartimento di Matematica e Informatica (Italy)

2010-10-15T23:59:59.000Z

491

Breakout Group 2: Membrane Electrode Assemblies  

NLE Websites -- All DOE Office Websites (Extended Search)

January 23-24, 2008 January 23-24, 2008 Breakout Group 2: Membrane Electrode Assemblies PARTICIPANTS Name Organization Jim Goldbach Arkema, Inc. Kev Adjemian Nissan Motor Co. Eric Funkenbusch 3M John Kerr Lawrence Berkeley National Laboratory Jonathan Sharman Johnson Matthey Fuel Cells Jean St-Pierre University of South Carolina Huyen Dinh National Renewable Energy Laboratory Bryan Pivovar Los Alamos National Laboratory Jim Martin Lockheed Martin Sami Mardini Superprotonic Reg Tyler U.S. Department of Energy/Golden Field Office Craig Gittleman General Motors Don Gervasio Arizona State University Eric Shrader Palo Alto Research Center Robert Miller MTI Micro Kathi Epping (Facilitator) U.S. Department of Energy

492

Applied Math and Statistics: Applied Math Minor Curriculum Chart: 2013-2014  

E-Print Network (OSTI)

Applied Math and Statistics: Applied Math Minor Curriculum Chart: 2013-2014 http://matlab-training.soe.ucsc.edu/ PROBABILITY THEORY OR AMS 131 Introduction to Probability Theory CE 107 Mathematical Methods of Systems by the department. #12;Applied Math and Statistics: Applied Math Minor Curriculum Chart: 2013-2014 http

Stuart, Josh

493

Postdoctoral Position in Applied Mathematics Seminar for Applied Mathematics of ETH Zurich  

E-Print Network (OSTI)

Postdoctoral Position in Applied Mathematics Seminar for Applied Mathematics of ETH Z¨urich The Seminar for Applied Mathematics (SAM) of ETH Z¨urich offers a post- doctoral position in applied a competitive salary according to the standards of ETH Z¨urich as well as the opportunity to work

Feichtinger, Hans Georg

494

PhD Position in Applied Mathematics Seminar for Applied Mathematics of ETH Zurich  

E-Print Network (OSTI)

PhD Position in Applied Mathematics Seminar for Applied Mathematics of ETH Z¨urich The Seminar for Applied Mathematics (SAM) of ETH Z¨urich offers a PhD position in applied mathematics. The main research teaching load. The successful candidate will receive a competitive salary according to the standards of ETH

Feichtinger, Hans Georg

495

Applied Intellectual Capital AIC | Open Energy Information  

Open Energy Info (EERE)

Zip: 94501-1010 Product: Applied Intellectual Capital (AIC) was founded in 1999 to fund technology development in clean energy, clean water and sustainable resources. References:...

496

Corrections APPLIED PHYSICAL SCIENCES, BIOPHYSICS AND  

E-Print Network (OSTI)

Corrections APPLIED PHYSICAL SCIENCES, BIOPHYSICS AND COMPUTATIONAL BIOLOGY Correction gene, MyHC-IIb, which is thought under most circumstances not to be expressed. The physiological

Spudich, James A.

497

Applied Films Corporation | Open Energy Information  

Open Energy Info (EERE)

Name: Applied Films Corporation Place: Longmont, Colorado Zip: 80504 Sector: Services, Solar Product: Provider of thin film deposition equipment and services, particularly to...

498

NETL: Electrochemical Membranes for Carbon Dioxide Capture and Power  

NLE Websites -- All DOE Office Websites (Extended Search)

Electrochemical Membranes for Carbon Dioxide Capture and Power Generation Electrochemical Membranes for Carbon Dioxide Capture and Power Generation Project No.: DE-FE0007634 FuelCell Energy, Inc. has developed a novel system concept for the separation of carbon dioxide (CO2) from greenhouse gas (GHG) emission sources using an electrochemical membrane. The proposed membrane has its genesis from the company's patented Direct FuelCell® (DFC®) technology. The prominent feature of the DFC membrane is its capability to produce power while capturing CO2 from the flue gas from a pulverized coal (PC) plant. The DFC membrane does not require flue gas compression as it operates on the principles of electrochemistry, resulting in net efficiency gains. The membrane utilizes a fuel (different from the plant flue gas, such as coal-derived syngas, natural gas, or a renewable resource) as the driver for the combined carbon capture and electric power generation. The electrochemical membrane consists of ceramic-based layers filled with carbonate salts, separating CO2 from the flue gas. Because of the electrode's high reaction rates, the membrane does not require a high CO2 concentration in its feed gas. The planar geometry of the membrane offers ease of scalability to large sizes suitable for deployment in PC plants, which is an important attribute in membrane design. The membrane has been tested at the laboratory scale, verifying the feasibility of the technology for CO2 separation from simulated flue gases of PC plants as well as combined cycle power plants and other industrial facilities. Fuel Cell Energy, Inc. is advancing the technology to a maturity level suitable for adaption by industry for pilot-scale demonstration and subsequent commercial deployment.

499

Improved Membrane Materials for PEM Fuel Cell Application  

SciTech Connect

The overall goal of this project is to collect and integrate critical structure/property information in order to develop methods that lead to significant improvements in the durability and performance of polymer electrolyte membrane fuel cell (PEMFC) materials. This project is focused on the fundamental improvement of PEMFC membrane materials with respect to chemical, mechanical and morphological durability as well as the development of new inorganically-modified membranes.

Kenneth A. Mauritz; Robert B. Moore

2008-06-30T23:59:59.000Z

500

In Plant and Animal Cells, Detergent-Resistant Membranes Do Not Define Functional Membrane Rafts  

Science Journals Connector (OSTI)

...working with mammalian cells. Critical voices from the plant camp remain rare and timid. Among them, the most pronounced one...533-544. Edidin, M. (2003). Lipids on the frontier: a century of cell-membrane bilayers. Nat. Rev. Mol. Cell Biol...

Widmar Tanner; Jan Malinsky; Miroslava Opekarová

2011-04-29T23:59:59.000Z