NAMS 2002 Workshop - ICOM 2008

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with model fuel mixtures. This fairly complex apparatus combines a desorption mini-oven with on-line gas chromatography (GC), to allow the on-line analysis of the desorbed mixture during a given desorption cycle. By a proper optimization of the measurement conditions in real time, in particular the GC sensitivity range and the desorption temperature profile, a very high sensitivity (0.1 microgram) was easily obtained for the measured weights. This very high sensitivity eventually enabled to determine partial sorption data differing by three orders of magnitude for the same experiment which, to the best of our knowledge, has never been reported so far. Several examples for multi- component sorption results will be discussed with a particular focus on two leading polymer materials used in multi-layer fuel tanks (high density polyethylene HDPE and an ethylene-vinyl alcohol copolymer EVOH) [4]. The whole set of sorption data revealed opposite trends for their swelling in model fuel mixtures ethanol/i-octane/toluene for a wide range of compositions typical for the various types of fuels. While HDPE absorbed preferentially the apolar hydrocarbons, EVOH displayed a very strong affinity towards ethanol. Another striking fact was that both barrier materials showed very different affinities for both hydrocarbons with a preferential sorption of toluene owing to its strong polarizability, in good agreement with former observations made for related permeability measurements [3]. References : [1] T. McNally, G.M. McNally, S.B. Byrne, W.R. Murphy, and I. Gilpin, Annual Technical Conference - ANTEC, Conference Proceedings, 3 (1998) 2642- 2646. [2] J. Wijmans, R. Baker, Journal of Membrane Science 107 (1995) 1-21 (review). [3] M. Nulman, A. Olejnik, M. Samus, E. Fead, and G. Rossi, Society of Automotive Engineers, Special Publication, SP-1365 (1998) 41-48. [4] R. Clément, C. Kanaan, B. Brulé, H. Lenda, P. Lochon, A. Jonquières, Journal of Membrane Science 302 (2007) 95-101.
Packaging and Barrier Materials – 2 Friday July 18, 3:00 PM-3:30 PM, Wai’anae Fundamental Exploration of Metal-Catalyzed Oxidation in Styrene- Butadiene-Styrene Block Copolymers K. Tung (Speaker), The University of Texas at Austin, Austin, Texas, USA C. Ferrari, The University of Texas at Austin, Austin, Texas, USA R. Li, The University of Texas at Austin, Austin, Texas, USA K. Ashcraft, The University of Texas at Austin, Austin, Texas, USA B. Freeman, The University of Texas at Austin, Austin, Texas, USA - freeman@che.utexas.edu D. Paul, The University of Texas at Austin, Austin, Texas, USA Barrier films are essential for packaging to prolong product shelf life, and films that have exceptional oxygen barrier properties are valuable for food packaging. One method to improve oxygen barrier properties is to incorporate reactive groups in the membranes[1, 2]. In the presence of a transition metal catalyst, these reactive groups capture, or scavenge O2 as it diffuses through a film. The ultimate goal of this study is to investigate the performance of scavenging polymers in the form of block copolymers containing a scavengable block, such as polybutadiene, and a block, such as polystyrene, that might compatibilize the material with a matrix barrier resin, such as polystyrene. This study will eventually lead to the investigation of multi-layered systems of styrenebutadiene-styrene (SBS) block copolymers and polystyrene. The rate and amount of oxygen uptake as a function of metal catalyst concentration, film thickness, and oxygen partial pressure were characterized using an SBS block copolymer with the following characteristics: MW: 114,800, 12.5 % polystyrene, and 76 % vinyl structure. The experiments were performed at 30 °C. Effect of metal-catalyzed oxidation on polymer morphology was also studied through microscopic and spectroscopic characterization. The experimental mass uptake data were used to characterize oxidation kinetics as a function of catalyst (cobalt neodecanoate) loading. Induction periods were observed in lower catalyst loadings. Mass uptake did not scale linearly with catalyst concentration; there was an optimum catalyst loading. Different values of optimum catalyst concentrations were found in homopolymers (i.e., poly(1,2butadiene) and poly(1,4-butadiene)) and the SBS block copolymer. Film thickness also had an effect on oxidation kinetics. Mass uptake values increased as film thickness decreased; in other words, oxidation is more efficient as the film becomes thinner. It was hypothesized that surface oxidation takes place as O2 molecules diffuse through SBS films. AFM images revealed a hard region, which was rationalized to be the oxidized layer, at the film surface. Normalizing by film surface area shows a close overlap of mass uptake data of various thicknesses,
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ICOM 2008 Oral Presentation Proceed
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Professor Yoram Cohen Professor Joh
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ICOM 2008 Staff: The University of
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ICOM 2008 Workshop Schedule: Saturd
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Monday, July 14 - Afternoon Session
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Tuesday, July 15 - Afternoon Sessio
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8:15AM 8:35AM EMS Barrer Prize (Mau
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Friday, July 18 - Morning Sessions
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Oral Presentation Abstracts Morning
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Gas Separation I - 1 - Keynote Mond
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esulting permeability selectivity o
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chain packing. To ensure a well pha
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Gas Separation I - 5 Monday July 14
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satisfactory way the corresponding
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Drinking and Wastewater Application
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an adjusted water management in the
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prospect for new energy sources as
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oxygen removal to the desired pH. C
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(Cl - , SO4 2- , As(V)) and water t
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[1] R. Lima de Miranda, J. Kruse, K
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Polymeric Membranes I - 4 Monday Ju
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Polymeric Membranes I - 5 Monday Ju
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Biomedical and Biotechnology I - 1
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Acknowledgments The Authors acknowl
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isolation of CD34+ cells was achiev
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membranes were then challenged with
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in crossflow mode operation were in
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hydroxide. For Mg/Ca = 0, the fouli
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improvement of filterability also t
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scale where fouling rates are commo
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observed in two subsequence phenome
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Membrane Modeling I - Fundamental A
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Membrane Modeling I - Fundamental A
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of the impact of the operating para
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Oral Presentation Abstracts Afterno
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Hybrid and Novel Processes I - 2 Mo
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Arora, M.B., J.A. Hestekin, S.W. Sn
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Conclusions Reverse electrodialysis
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energy recovery. This is a remarkab
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eaction with mediator due to the co
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Nanofiltration and Reverse Osmosis
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4.3x10 -6 to 7.4x10 -6 cm 2 /s. Bas
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The development of these membranes
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permeability, defined as water perm
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supports including charged (PSF/SPE
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[4] L. M. Robeson, Journal of Membr
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y conventional polymers and provide
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[3] P.M. Budd, K.J. Msayib, C.E. Ta
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Nanostructured Membranes I - 5 Mond
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Fuel Cells I - 1 Monday July 14, 2:
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investigated at first. As a result,
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Desalination I - 2 Monday July 14,
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Composite Polymeric Membrane Format
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NAMS Alan S. Michaels Award - 1a Tu
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NAMS Alan S. Michaels Award - 2 Tue
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opportunities for improving membran
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NAMS Alan S. Michaels Award - 4b Tu
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[4] K. Vanherck et al. Accepted for
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accumulation had a strong effect on
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and, if so, to develop correlations
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non-porous and porous membranes are
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[2] Palmeri, J., Sandeaux, R. Sande
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fouling. Information obtained from
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This work performed under the auspi
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etween Ru(bi-pyridine)3 2+ and meth
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[1] M. Barboiu, C. Luca, C. Guizard
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Nanostructured Membranes II - 5 Tue
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Nanostructured Membranes II - 6 Tue
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than 10 nm. XRD data suggest that t
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Pervaporation and Vapor Permeation
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ethanol/butanol (non solvent) combi
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forward osmosis, the RO process is
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Osmotically Driven Membrane Process
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References: [1] Stupp, S. I.; Lebon
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temperatures might bring about the
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References [1] S. Benita, Microenca
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solvent, were investigated (where a
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ease of manipulation as this allows
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Horizontal shrinkage does not have
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Absorption of water was determined
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Gas Separation II - 1 - Keynote Tue
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Gas Separation II - 2 Tuesday July
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concentration. These results are co
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Gas Separation II - 5 Tuesday July
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will be shown that homogeneous film
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which can adsorb on the surface of
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were collected, the viable bacteria
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pressure, and permporosimetry with
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Inorganic Membranes I - 3 Tuesday J
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Membrane Fouling - UF & Water Treat
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Membrane Modeling II - Gas Separati
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[10] Wang BG, Lv HL, Yang JC. Chem
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Membrane and Surface Modification I
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Gas Separation III - 1 - Keynote We
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Gas Separation III - 2 Wednesday Ju
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separation was next blended with di
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Polymeric Membranes II - 1 - Keynot
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Polymeric Membranes II - 3 Wednesda
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5. Erdodi, G.; Kennedy, J. P.; Prog
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observed for different locations in
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Biomedical and Biotechnology II - 3
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applied in the first two fields wil
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distribution of SBMA units within t
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5500 ppm (15 mM) was lowered to 30
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increasing the effective size of th
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etween 0 and 1), the automatic feed
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Membrane Modeling III - Process Sim
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Membrane Modeling III - Process Sim
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models developed suggests that ther
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start level has a huge impact on th
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Ultra- and Microfiltration I - Tran
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all three binary protein UF systems
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Synthetic solutions of ±-lactalbum
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Gas Separation IV - 2 Thursday July
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6. T. C. Merkel, Z. He, I. Pinnau,
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EMS Barrer Prize - 1b Thursday July
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EMS Barrer Prize - 3 Thursday July
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EMS Barrer Prize - 4b Thursday July
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EMS Barrer Prize - 5 Thursday July
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therapy options have been modelled
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Ultra- and Microfiltration II - Pro
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in the vicinity of the rising bubbl
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of feed water ionic strength) on re
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technology that has gained growing
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Optimize polymeric membranes for sa
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Inorganic Membranes II - 2 Thursday
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confirms that the carbon dioxide pe
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permeability, stability issues comp
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Fuel Cells II - 2 Thursday July 17,
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5. Conclusion In this work, the evo
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Oral Presentation Abstracts Afterno
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an essentially pure H2 product is c
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In the presentation, we will presen
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was observed, indicative of the sim
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References Arora, M.B., J.A. Hestek
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performance of fibers is analyzed a
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Membrane Fouling III - RO & Biofoul
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[4] H. Noureddini, Book of Abstract
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component (PX, OX) separation via p
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Generally these results were in goo
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introduction of methyl groups into
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separation quality (10 µS/cm) and
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Desalination II - 3 Thursday July 1
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drop are linearly related (although
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antiscalant oxidation has been limi
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oth 15±5 kDa, which suggests that
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Atomic Force Microscopy (AFM), and
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y single gas permeation experiments
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PDMS toplayers were only partially
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noting that cross-linking agents co
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such extended parameter space in th
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Hybrid Membranes - 6 Thursday July
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Plenary Lecture III Friday July 18.
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Gas Separation V - 1 - Keynote Frid
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References: [1] H. Lin, E. Van Wagn
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elative contributions of Fickian di
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Gas Separation V - 4 Friday July 18
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Gas Separation V - 6 Friday July 18
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Electron Microscopy (TEM) analyses
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- Hybrid RO train: A hybrid RO trai
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concentration as well as on the sod
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scaling deposits in the DCMD device
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Silica colloidal solution with diff
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Membrane Fouling IV - RO & Desalina
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Polyacrylonitrile (PAN) UF membrane
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the polymer dope was PEI (12 wt%),
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Inorganic Membranes III - 1 - Keyno
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Inorganic Membranes III - 2 Friday
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CO2/H2 selectivity at high temperat
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ammonia complexes in aqueous soluti
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possible to have a membrane capable
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