KOSEN 한인과학기술자네트워크

>Membrane을 이용하여 기체중 산성가스(H2S, CO2, NH3)을 분리하는 >최근의 동향을 알고 싶습니다. membrane은 Carbon membrane, polymer >membrane을 이용한 공정입니다. ---------------------------------------------------------------- 1. Studies in gas permeability and membrane gas separation in the Soviet Union Yampol'skii, Yu.P. (Acad of Sciences of the USSR) Volkov, V.V. Source: Journal of Membrane Science v 64 n 3 Dec 1 1991 p 191-228 0376-7388 Abstract: Trends in the investigations of diffusion, sorption, and permeation of gases in polymers having been carried out in the USSR for the last 10-15 years are reviewed. Emphasis is placed on the mechanism of permeation in glassy polymers, nonuniform and heterophase polymeric systems. The role of the specific interactions between a diffusant molecule and the polymer is outlined. New polymers, materials for gas separating membranes, as well as diverse membranes are described. Different types of membrane modules and their practical use are reviewed. In English 191 Refs EI92040453129 Ei tagged | Document availability and cost 2. Macromolecular design of permselective membranes Aoki, Toshiki (Niigata Univ) Source: Progress in Polymer Science (Oxford) 24 7 1999 Elsevier Science Ltd p 951-993 0079-6700 Abstract: This review article discusses mainly the relationship between the chemical structure of new macromolecules synthesized for permselective membranes and their permselectivity, published over the period of twelve years, from 1985 to June 1996. Therefore, this review deals with macromolecules having well-defined structures and with permselective membranes whose separation mechanisms depend on the chemical structures of the membrane polymer. This review describes oxygen permselective membranes which concentrate oxygen in air, ethanol permselective membranes which concentrate ethanol in dilute aqueous ethanol solution, and optical resolution membranes which concentrate one enantiomer in racemates. In addition, permselective membranes whose permeability or permselectivity are controlled by external stimulation are also described. In English 127 Refs. Ei tagged | Document availability and cost 3. Polymers for gas separations: The next decade Stern, S. Alexander (Syracuse Univ) Source: Journal of Membrane Science v 94 Sept 19 1994 Elsevier Science Publishers B.V. p 1-65 0376-7388 Abstract: The paper examines the progress made in the understanding of the structure/permeability/selectivity relationships of polymers, with emphasis on selected rubbery and glassy polymers. The macroscopic (continuum), microscopic and molecular models of gas transport in polymers are also reviewed. The potential usefulness of computer simulation techniques for predicting polymer structures that enhance penetrant gas mobility and selectivity is discussed. Finally, conjectures are offered as to possible advances in membrane separations of gaseous mixtures in the coming decade. In English 262 Refs. EI94122481640 Ei tagged | Document availability and cost 4. Receptor and transport properties of imprinted polymer membranes - a review Piletsky, S.A. (Ukrainian Acad of Sciences) Panasyuk, T.L. | Piletskaya, E.V. | Nicholls, I.A. | Ulbricht, M. Source: Journal of Membrane Science v 157 n 2 May 7 1999 Elsevier Science Publishers B.V. p 263-278 0376-7388 Abstract: Over the last 10 years new types of polymeric materials with molecular recognition sites for low-weight organic substances have been prepared using the molecular imprinting approach. In this review paper, in particular, the recognition and transport properties of molecularly imprinted polymer (MIP) membranes prepared thus far are summarized and analyzed. Microporous and macroporous MIP membranes show the same receptor but largely different transport properties. The nature of selectivity of microporous MIP membranes is discussed and a descriptive model for transport selectivity via specific `gates' is developed. The high specificity and stability of MIPs render them as promising alternatives to enzymes, antibodies, and other natural receptors usually used in affinity chromatography and sensor technology. The application potential of MIP membranes, especially for affinity separations, membrane chromatography and membrane sensors, is outlined. Conclusions about the possibilities to improve their performance are presented. In general, these investigations open a way to the design of supramolecular devices that could perform highly selective functions such as recognition, transformation, transfer, regulation and allow signal and information processing. In English 58 Refs. EI99054673956 Ei tagged | Document availability and cost 5. Phase separation processes in polymer solutions in relation to membrane formation van de Witte, P. (Philips Research) Dijkstra, P.J. | van den Berg, J.W.A. | Feijen, J. Source: Journal of Membrane Science 117 1-2 Aug 21 1996 Elsevier Science B.V. p 1-31 0376-7388 Abstract: This review covers new experimental and theoretical physical research related to the formation of polymeric membranes by phase separation of a polymer solution, and to the morphology of these membranes. Two main phase separation processes for polymeric membrane formation are discussed: thermally induced phase separation and immersion precipitation. Special attention is paid to phase transitions like liquid-liquid demixing, crystallization, gelation, and vitrification, and their relation to membrane morphology. In addition, the mass transfer processes involved in immersion precipitation, and their influence on membrane morphology are discussed. In English 157 Refs. EI96083299304 Ei tagged | Document availability and cost 6. Polymermembranen in der Stofftrenntechnik Paul, Dieter (Akad der Wissenschaften der DDR) Groebe, Volker | Roedicker, Herbert Source: Chemische Technik (Leipzig) v 41 n 5 May 1989 p 187-192 0045-6519 Abstract: In the past 20 years polymer membranes have been developed from the object of simple laboratory studies to an industrial product with high technological and economical importance. The activities in research and development at the Institute of Polymer Chemistry in the field of membrane formation and characterization and with regard to application in the separation of mixtures the Technical University of Kothen are presented. The main subject of this paper is the formation of flat and hollow-fiber membranes from cellulose and derivatives, polyacrylonitrile, polyvinyl chloride and polymer symplexes. Studies of liquid-phase separation, polymer-permeate reactions and membrane applications in various separation processes are reviewed. In conclusion, some future problems in membrane development are indicated. In German 61 Refs Ei tagged | Document availability and cost 7. Photoreversible polymeric membranes Hauenstein, D.E. (Dow Corning Corp) Rethwisch, D.G. Source: Separation and Purification Methods v 22 n 1 1993 p 23-53 0090-0435 Abstract: In this review we focus on the use of light (photons) as the external control stimulus. Specifically, we examine the ability to control polymeric membrane properties by incorporating reversible photochromic moieties into the polymer structure. The first section is a brief review of the chemistry of photochromic compounds, the second section focuses on photocontrol of the separation properties of nonporous and hydrogel membranes, and the third section discusses the photocontrol of release rates from synthetic bilayer membranes. In English 89 Refs EI94011179454 Ei tagged | Document availability and cost 8. Water-casting ultrathin-film composite membranes for air separation Li, Xin-Gui (Tianjin Inst of Textile Science and Technology) Huang, Mei-Rong Source: Separation Science and Technology 31 5 Mar 1996 Marcel Dekker Inc p 579-603 0149-6395 Abstract: The water-casting method is one of the most important techniques for the preparation of pinhole-free ultrathin film for air separation. Strong interest exists in the optimizations of preparing routes of the ultrathin film and of the fabrication of the ultrathin-film composite membranes with a variety of polymers. A number of water-casting solvents with high spreadability over water are offered in the present review. Progress made in the inconsecutive and continuous preparations of ultra-thin films is reviewed in detail. The oxygen permselectivity, air separation performance, and the stability of ultrathin-film composite membranes are discussed with a detailed citation of references. This review also compares the performances through ultrathin-film composite membranes fabricated by the water-casting method with other methods. In English 120 Refs. EI96043153123 Ei tagged | Document availability and cost 9. Development of membrane systems based on conducting polymers Price, W.E. (Univ of Wollongong) Too, C.O. | Wallace, G.G. | Zhou, D. Source: Synthetic Metals v 102 n 1-3 pt 2 Jun 1999 Sponsored by: Ministere de l'Education Nationale; Universite de Montpellier II; Conseil Regional du Languedoc-Roussillon; District de Montpellier; et al. Elsevier Sequoia SA p 1338-1341 0379-6779 Abstract: We have developed a new generation of intelligent membrane systems using conducting polymers, utilising their unique electroactive properties. The chemical and physical properties of the film may be manipulated in-situ by application of electrical stimuli. This in turn allows modulation of the transport properties (even switching the transport off/on) and selectivity of the membrane. In addition, the versatility of synthesis of conducting polymers allows a wide range of chemistries and hence selectivities to be obtained to target particular applications, such as mineral recovery, protein separation, and salt rejection. Membranes can be fabricated as free standing films, composites, layer structures, or as thin films on conventional substrates. This paper reviews the development of these systems and highlights recent work on membranes with thin selective layers of conducting polymer. In English 27 Refs. EI99104858859 Ei tagged | Document availability and cost 10. Gas separation using polymer membranes: an overview Ghosal, Kanchan (Reichhold Chemicals Research) Freeman, Benny D. Source: Polymers for Advanced Technologies 5 11 Nov 1994 John Wiley & Sons Ltd p 673-697 1042-7147 Abstract: This overview article discusses fundamental principles of gas sorption and transport in rubbery and glassy polymers and material selection guidelines for gas separation membranes. Comparisons between the performance of membrane-based gas separation systems and more conventional technologies in key commercial applications are provided. Companion articles in this special edition focus on state-of-the-art reviews and descriptions of theoretical and experimental developments important in the technology of gas separations using polymeric membranes. In English 113 Refs. EI95032625233 11. Sol-gel strategies for controlled porosity inorganic materials Brinker, C.J. (Sandia Natl Lab) Sehgal, R. | Hietala, S.L. | Deshpande, R. | Smith, D.M. | Loy, D. | Ashley, C.S. Source: Journal of Membrane Science v 94 Sept 19 1994 Elsevier Science Publishers B.V. p 85-102 0376-7388 Abstract: The porosity (i.e., pore volume, pore size, and surface area) of ceramic materials prepared by sol-gel processing depends on the size and structure of primary particles or polymers formed by condensation reactions, the organization of these structures, often by aggregation, to form a gel, and the collapse of the gel by drying. This paper reviews these ideas in the context of the formation of thin films suitable for inorganic membranes and introduces a number of specific strategies designed to control pore sizes in the range appropriate for gas separation: (1) aggregation of fractals; (2) management of capillary pressure, (3) control of condensation rate, and (4) the use of organic or microporous templates in composite thin film structures. These strategies are contrasted with the more traditional particle packing approach to preparing controlled porosity materials. In English 41 Refs. EI94122481642 Ei tagged | Document availability and cost 12. Application of side-chain liquid-crystalline polymers Hsu, Chain-Shu (Natl Chiao Tung Univ) Source: Progress in Polymer Science (Oxford) v 22 n 4 1997 Elsevier Science Ltd p 829-871 0079-6700 Abstract: Recent advances in the applications of side-chain liquid crystalline polymers (LCPs) are reviewed. Nematic and smectic side chain LCPs are used for optical data storage, non-linear optics, stationary phases, and gas separation membranes. The cholesteric side-chain LCPs can be used as optical filters, reflectors, linear polarizers and retardation films. Ferroelectric side-chain LCPs can be used for applications such as displays, piezoelectric transducers, non-linear optics, and pyroelectric detectors. Both cholesteric and ferroelectric side-chain LCPs are also useful as stationary phases for gas chromatography, supercritical fluid chromatography, and high performance liquid chromatography. In English 159 Refs. EI97093814003 Ei tagged | Document availability and cost 13. Polysilicon hydrocarbons. Synthesis, structure and gas separating properties. Review Plate, N.A. (USSR Acad of Sciences) Antipov, Ye.M. | Teplyakov, V.V. | Khotimskii, V.S. | Yampol'skii, Yu.P. Source: Polymer Science USSR (English Translation of Vysokomolekulyarnye Soyedineniya Series A) v 32 n 6 1990 p 1053-1068 0032-3950 Abstract: The link between the structure of silicon-containing polymers and their gas transferring properties is considered. Methods are described for synthesizing polyvinyltrimethylsilane and copolymers of vinyl trimethylsilane with dienes and siloxanes. Information is presented on a commercial gas-separating membrane based on polyvinyltrimethylsilane - technology of production, characteristics and areas of application. The properties of new silicon-containing polymers of the acetylenic and allyl types are briefly discussed. In English 48 Refs EI91110341950 Ei tagged | Document availability and cost 14. Proceedings of the Symposium on Membrane Technology Source: Desalination v 77 n 1-3 Mar 1990 Publ by Elsevier Science Publ BV (North-Holland) p 5-345 0011-9164 Abstract: This journal contains 16 papers presented at a meeting. The topics covered include reverse osmosis, ultrafiltration, microfiltration, gas separation, pervaporation and membrane distillation. Theoretical aspects, experimental studies and applications are discussed. In English Ei tagged | Document availability and cost 15. Gas separation and pervaporation. Membrane and module development Strathmann, H. (Fraunhofer-Inst fuer Grenzflaechen) Bell, C.-M. | Kerres, J. Source: Desalination v 77 n 1-3 Mar 1990 p 259-278 0011-9164 Abstract: In this paper the basics of mass transport in gas separation and pervaporation membranes are briefly reviewed. Selection criteria for polymers to be used for the preparation of the selective barrier and porous support are given. The effect of the support porosity and pore size distribution on the overall transmembrane flux and its mass separation properties are discussed. The development of a composite capillary membrane and its use in recovering organic solvents from waste air streams and aqueous solutions is described. In English 18 Refs Ei tagged | Document availability and cost 16. Membranes, membrane processes, and their applications. Needs, unsolved problems, and challenges of the 1990's Michaels, Alan S. (North Carolina State Univ) Source: Desalination v 77 n 1-3 Mar 1990 p 5-34 0011-9164 Abstract: The recent development of (1) novel polymeric materials of unique functionality or microstructure; (2) inorganic (ceramic) semipermeable materials; (3) novel ultrathin-barrier laminate structures comprised of both organic and refractory components; and (4) interpenetrating multiphase structures with anomalous transport characteristics, promises to yield membranes with superior chemical/thermal stability, fouling resistance, organic solvent resistance, and unusually high permselectivities and permeabilities. Such membranes may well circumvent many of these limitations. Similarly, recent developments in membrane module design, including rotational membrane devices and pulsed flow fluid management for polarization control, use of low-cost refractory monoliths as membrane supports, and use of electric potentials to minimize macrosolute polarization and fouling, may permit practical and economic application of membrane processes to liquid and gaseous streams which today are untreatable by such methods. Of growing industrial importance are a family of new applications for membranes which make use of membrane structures as substrates for immobilization of catalysts (e.g., enzymes) or of specific complexing agents (e.g., affinity ligands). These developments should lead to important new chemical synthesis processes, and to novel and efficient strategies for industrial-scale purification of complex biological products. In English Ei tagged | Document availability and cost 17. Technologies and catalysts of hydrogen generation for fuel cells Ito, Takashi (N.E. Chemcat Corp) Source: Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy 78 11 1999 Maruzen Co Ltd p 911-920 0916-8753 Abstract: Among various types of fuel cells, the polymer membrane electrolyte fuel cell (PEFC) has attracted increasing interest as a propulsion of vehicles, because of nearly zero emission and high fuel efficiency. Although a hydrogen is the most ideal fuel for PEFC, the infrastructure to supply it and container to carry it for fuel cell vehicles are the big problems. Thus, the on-board reforming of liquid fuel to generate hydrogen has been pursued. The status of the technology development for hydrogen generation is reviewed. The hydrogen generation reactions are classified into 1) decomposition, 2) steam reforming, 3) partial oxidation, and 4) auto-thermal reforming. Various reactors have been developed; 1) external heating steam reformer, 2) recuperated plate stacked reformer, 3) adiabatic auto-thermal reformer. The carbon monooxide concentration of anode feed for PEFC should be reduced to under 100 ppm. Various CO-removal technologies have been developed; 1) water-gas shift, 2) preferential oxidation, 3) methanation, 4) hydrogen separation, and 5) CO-adsorption. These technologies and their key catalysts are reviewed. In Japanese 32 Refs. Ei tagged | Document availability and cost 18. Polyphosphazene Membrane Separations Review Golemme, G. Drioli, E. Source: Journal of Inorganic and Organometallic Polymers v 6 n 4 1996 p 341 1053-0495 Abstract: In English EI97063671153 Ei tagged | Document availability and cost 19. Pervaporation using adsorbent-filled membranes Ji, Wenchang (CeraMem Corp) Sikdar, Subhas K. Source: Industrial & Engineering Chemistry Research 35 4 Apr 1996 ACS p 1124-1132 0888-5885 Abstract: Membranes containing selective fillers, such as zeolites and activated carbon, can improve the separation by pervaporation. Applications of adsorbent-filled membranes in pervaporation have been demonstrated by a number of studies. These applications include removal of organic compounds from water, dehydration of azeotropic mixtures, and organic/organic separation. Three different types of adsorbents have been evaluated: zeolites, activated carbon, and carbon molecular sieves. Experimental results show the most promising filled membrane is the silicalite-filled poly(dimethylsiloxane) (PDMS) membrane which can be effectively used in the removal of organic compounds from water. The transport of species through adsorbent-filled membranes occurs by a sorption-diffusion mechanism. Sorption of species in the filled rubbery membranes can be described by a dual sorption model. Modeling of the transport process through filled membranes involves mass-transfer resistances in the different phases of the membranes: in the polymer phase, in the adsorbent phase, and in a polymer-adsorbent interface. Several models based on resistance-in-series mechanisms that were developed to describe the experimental results were reviewed. In English Refs. EI96053162467 Ei tagged | Document availability and cost 20. Liquid crystalline polyphosphazene and its separation membrane Li, Xingui (Tongji Univ) Huang, Meirong Source: Jianzhu Cailiao Xuebao/Journal of Building Materials 1 Dec p 348-353 1007-9629 Abstract: A review with 14 references on the synthesis, crystalline structure, liquid crystallinity, melt rheological behavior, gas-separation and pervaporation properties of a new type of functional liquid crystalline polymer - polyphosphazene is presented. The effect of the side groups of the polyphosphazene on the crystalline structure, liquid crystallinity and gas separation properties is discussed. It is suggested that the polyphosphazene membrane exhibits flood gas-separation and organic aqueous pervaporation capabilities. In Chinese --------------------------------------------------------------------------------------------------------------------------------

>Membrane을 이용하여 기체중 산성가스(H2S, CO2, NH3)을 분리하는 >최근의 동향을 알고 싶습니다. membrane은 Carbon membrane, polymer >membrane을 이용한 공정입니다. -------------------------------------------------------------------- Pervaporation using adsorbent-filled membranes Ji, Wenchang (CeraMem Corp) Sikdar, Subhas K. Source: Industrial & Engineering Chemistry Research 35 4 Apr 1996 ACS p 1124-1132 0888-5885 Abstract: Membranes containing selective fillers, such as zeolites and activated carbon, can improve the separation by pervaporation. Applications of adsorbent-filled membranes in pervaporation have been demonstrated by a number of studies. These applications include removal of organic compounds from water, dehydration of azeotropic mixtures, and organic/organic separation. Three different types of adsorbents have been evaluated: zeolites, activated carbon, and carbon molecular sieves. Experimental results show the most promising filled membrane is the silicalite-filled poly(dimethylsiloxane) (PDMS) membrane which can be effectively used in the removal of organic compounds from water. The transport of species through adsorbent-filled membranes occurs by a sorption-diffusion mechanism. Sorption of species in the filled rubbery membranes can be described by a dual sorption model. Modeling of the transport process through filled membranes involves mass-transfer resistances in the different phases of the membranes: in the polymer phase, in the adsorbent phase, and in a polymer-adsorbent interface. Several models based on resistance-in-series mechanisms that were developed to describe the experimental results were reviewed. In English Refs. EI96053162467 Ei tagged | Document availability and cost 4. Technologies and catalysts of hydrogen generation for fuel cells Ito, Takashi (N.E. Chemcat Corp) Source: Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy 78 11 1999 Maruzen Co Ltd p 911-920 0916-8753 Abstract: Among various types of fuel cells, the polymer membrane electrolyte fuel cell (PEFC) has attracted increasing interest as a propulsion of vehicles, because of nearly zero emission and high fuel efficiency. Although a hydrogen is the most ideal fuel for PEFC, the infrastructure to supply it and container to carry it for fuel cell vehicles are the big problems. Thus, the on-board reforming of liquid fuel to generate hydrogen has been pursued. The status of the technology development for hydrogen generation is reviewed. The hydrogen generation reactions are classified into 1) decomposition, 2) steam reforming, 3) partial oxidation, and 4) auto-thermal reforming. Various reactors have been developed; 1) external heating steam reformer, 2) recuperated plate stacked reformer, 3) adiabatic auto-thermal reformer. The carbon monooxide concentration of anode feed for PEFC should be reduced to under 100 ppm. Various CO-removal technologies have been developed; 1) water-gas shift, 2) preferential oxidation, 3) methanation, 4) hydrogen separation, and 5) CO-adsorption. These technologies and their key catalysts are reviewed. In Japanese 32 Refs. Ei tagged | Document availability and cost 5. Microporous inorganic membranes for gas separation Morooka, Shigeharu Kusakabe, Katsuki Source: MRS Bulletin v 24 n 3 Mar 1999 MRS p 25-29 0883-7694 Abstract: Microporous inorganic membranes are potentially useful in gas separation in emerging areas such as catalytic reactors, gasification of coal, molten-carbonate and solid-electrolyte fuel cells and water decomposition by thermochemical reactions. The permeation rate and permselectivity of porous inorganic membranes are dependent on the microstructures of membranes/support composites such as pore size and distribution, porosity, tortuosity and the affinity between permeating species and pore walls. In order to achieve effective separation of small-molecule gases, the membrane pores should be smaller than 2 nm. The preparation processes and permeation properties of porous inorganic membranes are reviewed and permeation mechanisms are discussed. In English 42 Refs. EI99044635813 Ei tagged | Document availability and cost 6. Clean water act in 1995: new interpretation or encore? Forsythe, Thomas M. (Kyzen Corp) Andrus, James J. Source: Precision Cleaning 3 3 Mar 1995 Witter Publ Co. 4pp 1068-6037 Abstract: The impact of The Clean Water Act and the Safe Drinking Water Act on component manufacturers and PCB assembly operations mostly apply to new CFC-free cleaning operations. Eliminating CFC-cleaning processes involves more than selecting a new machine or chemical. It is a complete process change which includes a new requirement for high-quality rinse water. After a a definition of the key contaminants and a review of how these two regulations will affect electronics manufacturing, this paper considers various 'closed-loop' technologies that could help minimize waste generation. In English EI95042656926 Ei tagged | Document availability and cost 7. Praktischer Einsatz von Mikro-, Ultra-, Nanofiltration, Umkehrosmose, Diffusionsdialyse, Elektrodialyse und deren Verfahrenskombinationen zur Aufbereitung organisch/anorganisch belasteter Loesungen. Teil 2 Marquardt, K. Source: Galvanotechnik v 84 n 4 Apr 1993 p 1286-1291 0016-4232 Abstract: Part 2 of a series reviewing the scope of membrane processes deals with the use of ultrafiltration to extend the life of degreasing baths. A special composite membrane is described which allows the treatment of desorbate solutions resulting from the regeneration of activated carbon in organic coating plants. Practical results are also reported with respect to separation of mineral oils as well as post-purification of effluent from a classical physicochemical effluent treatment plant. In German EI93061007292 Ei tagged | Document availability and cost 8. Membrane technology applications in the pulp and paper industry Anon Source: NCASI Technical Bulletin n 763 Aug 1998 NCASI 44pp 0886-0882 Abstract: A review of the literature on the application of membrane technology in the pulp and paper industry is conducted. Information is given on research activities and full-scale experience with pressure-driven membrane processes such as reverse osmosis, nanofiltration, and ultrafiltration, as well as electrochemical membrane processes such as electrodialysis. The review includes a discussion of the potential for using other membrane separation processes and the direction of membrane research as it relates to membrane development, equipment development, and disposal of concentrated streams. In English 80 Refs. EI98094395356 Ei tagged | Document availability and cost 9. Advances in Separation Processes Source: Institution of Chemical Engineers Symposium Series n 118 Apr 3-4 1990 1990 Publ by Inst of Chemical Engineers 218p 0307-0492 Abstract: This symposium proceedings constains sixteen papers. The topics discussed are the following: adsorption isotherms of albumin on a cross-linked cellulose chromatographic ion-exchanger; preparative scale chromatographic systems as combined biochemical reactor-separators; the Mannheim adsorption project: countercurrent staged adsorption with central vacuum purge gas desorption; Sorbex: industrial-scale adsorptive separation; scale-up of vapor phase adsorption columns for breaking the ethanol-water azeotrope; studies on the use of anion-exchange cellulose at process-scale; liquid phase selective adsorption of xylenes; reversed micellar-membrane-extraction of enzymes; properties of microfiltration membranes (Part 3. Effect of physicochemical conditions on crossflow microfiltration at aluminum oxide membranes); enhanced mass transfer for membrane processes; new method for the determination of wettability in a membrane distillation process; a review of current advanced design prodecures for liquid-liquid extraction columns and of present problems; protein adsorption in liquid fluidized beds; aqueous two-phase fractionation of biological feedstocks: practical evaluation in the purification of yeast proteins; high pressure adsorption of aqueous fructose/glucose mixtures on an activated carbon and thier supercritical desorption; and affinity fluid-polymer membranes for separations from aqueous media. In English EI91070236878 Ei tagged | Document availability and cost 10. Recovery and utilization of methane from solid waste landfills Frantz, J.H. Jr. (S. A. Holditch & Associates, Inc) Wood, Randy M. | Sawyer, Walter K. | Delozier, Denise L. Source: Proceedings - SPE Annual Technical Conference and Exhibition 1 (PI) Oct 3-Oct 6 1999 1999 Soc Pet Eng (SPE) p 13-19 Abstract: This paper will discuss new developments in recovery and utilization of methane from solid waste landfill projects in the United States. Landfills produce methane and CO2 gas (LFG) at 550 BTU/scf due to decomposition of biodegradable waste. The LFG recovery industry started in California in the 1970's and has continued to expand. During the 1970's and 1980's, LFG was used primarily as an energy source for direct onsite use such as boilers, electric generation, and co-generation. In the 1990's, many landfills began investigating upgrading LFG to pipeline quality, high BTU gas. LFG can be upgraded commercially to pipeline standards by removing the CO2 using adsorption, membrane separation, or cryogenic processes. This paper will review the historical uses of LFG, but focuses on the more recent efforts to process and upgrade LFG to high BTU, pipeline quality gas. Several case histories will be presented showing historical landfill gas rates, gas rate history matches using LFG reservoir models, and performance forecasts for future LFG rates. We will also discuss a methodology to develop a more robust simulation model to estimate landfill gas production. In English 15 Refs. Ei tagged | Document availability and cost

Attached are ddditional papers about membranes for gas separations.

Attached are some papers in pdf which you may want to look at . Thanks. khekim@nrel.gov