Sorption and transport properties of gases in aromatic polyimide membranes

Wang, Yi-Chieh; Huang, Shu-Hsien; Hu, Chien‐Chieh; Li, Chi-Lan; Lee, Kueir‐Rarn; Liaw, Der‐Jang; Lai, Juin‐Yih

doi:10.1016/j.memsci.2004.09.015

Cited by 85 publications

(33 citation statements)

References 37 publications

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“…This could be due to the less percentage of PIS incorporation of only 20%. Also, it is well known that 6FDA based polyimide containing bulky hexafluoroisopropylidene linkage in the dianhydride moiety shows the highest gas permeability value [28]. For the plain PDMS membrane [0% PIS], the permeability coefficient for N 2 was observed to be 438 Barrer, 662 Barrer for O 2 and 2068 Barrer for CO 2 .…”

Section: Permeability Measurementsmentioning

confidence: 99%

Structure–gas transport property relationships of hexafluoroisopropylidene based poly(imide-siloxane)s

Srividhya

Reddy

2007

Journal of Membrane Science

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Section: Permeability Measurementsmentioning

confidence: 99%

Structure–gas transport property relationships of hexafluoroisopropylidene based poly(imide-siloxane)s

Srividhya

Reddy

2007

Journal of Membrane Science

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“…Therefore, the development of membranes with better selectivity to molecular oxygen is pursued by means of altering the packing density of the polymer, inducing molecular sieving (Wang et al, 2005), or the modification of the polymer top layer by plasma (Ruaan et al, 1998). The literature reported an increase in the oxygen selectivity over nitrogen up to 10, followed by a reduction in permeate flux.…”

Section: Introductionmentioning

confidence: 99%

Myoglobin entrapment in poly(vinyl alcohol) dense membranes

Figueiredo

Alves

Borges

2014

Braz. J. Chem. Eng.

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-Our goal in this study was the immobilization of myoglobin in poly(vinyl alcohol) dense membranes. Glutaraldehyde was investigated both as the crosslinking agent, aiming to increase the membrane stability in aqueous medium, and as the vehicle to bind myoglobin and PVA. Reaction and membrane synthesis were carried simultaneously in mild operating conditions in order to maintain the native protein folding. Membrane characterization comprised the water swelling degree, DSC, TGA, UV-visible spectroscopy, FTIR analysis and oxygen transport in a dialysis cell. The incorporation of myoglobin in the film decreased the water swelling degree and improved the membrane thermal properties compared to unmodified PVA membrane. The reduction of ferric iron in the prosthetic group of the protein to the ferrous form was observed. The increased affinity between oxygen and the immobilized myoglobin did not favor the release of this solute from the biocarrier.

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“…Systems are compact and mobile and can be configured to treat a wide range of feed stream flow rates and compositions. The separation of aromatic VOCs has been investigated over various gas membranes (Dingemans et al, 2008;Obuskovic et al, 2003;Sohn et al, 2000;Wang et al, 2005). However, there is scarce studies on utilization of gas membrane separation in maintain biofilter performance during transient VOC loadings.…”

Section: Introductionmentioning

confidence: 99%

A biofilter integrated with gas membrane separation unit for the treatment of fluctuating styrene loads

Lian

Han

et al. 2012

Bioresource Technology

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a b s t r a c tBiofiltration for volatile organic compound control in waste gas streams is best operated at steady contaminant loadings. To provide long-term stable operation of a biofilter under adverse contaminant feeding conditions, an integrated bioreactor system with a gas separation membrane module installed after a biofilter was proposed for styrene treatment. Styrene was treated effectively, with average styrene effluent concentrations maintained at less than 50 mg m À3 and a total removal efficiency of over 96% achieved when the biofiltration column faced fluctuating loads. The maximum elimination capacity of the integrated bioreactor system was 93.8 g m À3 h À1, which was higher than that obtained with the biofiltration column alone. The combination of these two processes (microbial and chemical) led to more efficient elimination of styrene and buffering of the fluctuating loads. The factors on gas membrane separation, microbial characteristics in the integrated bioreactor and membrane fouling were also investigated in this study.

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Sorption and transport properties of gases in aromatic polyimide membranes

Cited by 85 publications

References 37 publications

Structure–gas transport property relationships of hexafluoroisopropylidene based poly(imide-siloxane)s

Structure–gas transport property relationships of hexafluoroisopropylidene based poly(imide-siloxane)s

Myoglobin entrapment in poly(vinyl alcohol) dense membranes

A biofilter integrated with gas membrane separation unit for the treatment of fluctuating styrene loads

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