Pervaporation of dilute alcoholic mixtures using PDMS membrane

Mohammadi, Toraj; Aroujalian, Abdolreza; Bakhshi, Ali

doi:10.1016/j.ces.2004.11.039

Cited by 128 publications

(79 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These results were representative for all ethanol/water mixtures examined and all membranes used, and correspond well with data obtained by Mohammadi et al [38] and Li et al [39].…”

Section: Effect Of Timesupporting

confidence: 86%

“…Opposite findings for PDMS membranes were reported by Mohammadi et al [38], where water flux increased significantly with an increase of selective component concentration in the feed in comparison to alcohol flux. The authors stated that increase in the membrane-free volume and thus simultaneous increase of the side chain mobility, caused by the feed concentration increase allowed easier permeation of the small-sized water clusters through the membrane-free volume, leading therefore to enhanced water diffusion.…”

Section: Effect Of the Feed Compositionmentioning

confidence: 72%

See 1 more Smart Citation

Performance of PDMS membranes in pervaporation: Effect of silicalite fillers and comparison with SBS membranes

Dobrak

Figoli

Chovau

et al. 2010

Journal of Colloid and Interface Science

115

View full text Add to dashboard Cite

“…These results were representative for all ethanol/water mixtures examined and all membranes used, and correspond well with data obtained by Mohammadi et al [38] and Li et al [39].…”

Section: Effect Of Timesupporting

confidence: 86%

Section: Effect Of the Feed Compositionmentioning

confidence: 72%

Performance of PDMS membranes in pervaporation: Effect of silicalite fillers and comparison with SBS membranes

Dobrak

Figoli

Chovau

et al. 2010

Journal of Colloid and Interface Science

115

View full text Add to dashboard Cite

“…Polydimethyl-siloxane (PDMS) polymer is among those. 3,4 But from a critical thickness outward, PDMS presents poor mechanical and filmforming abilities. 5 These disadvantages have been overcome by using the composite multilayer structure, in which PDMS as the active skin layer is plated on a porous polymeric support by various technologies.…”

Section: Introductionmentioning

confidence: 99%

Influence of binding interface between active and support layers in composite PDMS membranes on permeation performance

Shi

Huang

Xiao

et al. 2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

Effect of the binding interfaces of composite polydimethylsiloxane (PDMS) membranes on their pervaporation performance was studied. The membranes were made up of PDMS as active skin layer and polysulfone (PSF) or polyamide (PA) as supporting layer. PDMS-PSF membrane was numbered 1, and PDMS-PA membrane numbered 2. The pervaporation experiments were carried out by using the composite membranes and dilute ethanol-water mixture. The experimental measurements for the permeation performance under various operating conditions (e.g., feed concentration and temperature) showed that the specific permeation rate of membrane 2 was over membrane 1 by seven times at least. A resistance-in-series model was applied to formularize the transport of the permeants. Influence of the binding interfaces between the active skin layer and support layers in these membranes on pervaporation performance was analyzed. The cross section morphology of the membranes and chemical element distribution along membrane thickness were examined by using SEM and EDS. It was found that, although the PDMS intrusion layer into PSF near the interface was only about 2 mm, it gave significant effect on the permeation performance. It implied that the resistance produced by the intrusion layer into PSF was apparently larger than that of PDMS intruding PA and over intrinsic PDMS resistance. These should be probably attributed to structures and formation of the binding interfaces.

show abstract

“…In recent years, pervaporation (PV) has been proven to be a feasible technology with a number of potential advantages over conventional sulfur removal process from gasoline [1,2]. Polydimethylsiloxane (PDMS) is the most interesting and promising polymetric membrane materials and has been extensively investigated for the separation of different mixtures by PV [3,4].…”

Section: Introductionmentioning

confidence: 99%

Pervaporation separation of n-heptane/sulfur species mixtures with polydimethylsiloxane membranes

Zhao

et al. 2008

Separation and Purification Technology

View full text Add to dashboard Cite

a b s t r a c tWith the mixtures of n-heptane and different sulfur species making up the model gasoline, polydimethylsiloxane (PDMS)/polyetherimide (PEI) composite membranes were prepared and used for sulfur removal from gasoline. Effects of sulfur species, feed sulfur content and feed temperature on the desulfurization efficiency were investigated for a series of binary n-heptane/sulfur species mixtures by pervaporation. Experimental results indicated that the change of feed sulfur content produced insignificant effect on sulfur enrichment factor for every sulfur species, while the partial fluxes of sulfur species were proportional to feed sulfur content. With the feed temperature increase, total flux increased for every binary mixture. Sulfur enrichment factor decreased in the following order at the same temperature: thiophene > 2-methylthiophene > 2,5-dimethylthiophene > n-butyl mercaptan > n-butyl sulfide. Correspondingly activation energy of permeation was also obtained. In order to simulate the desulfurization process of real gasoline, effect of more sulfur species coupling exist on separation efficiency was also investigated. With the increase of sulfur species number according to the decrease order of sulfur enrichment factor, total sulfur enrichment factor decreased while total flux was almost invariable.Crown

show abstract

Pervaporation of dilute alcoholic mixtures using PDMS membrane

Cited by 128 publications

References 15 publications

Performance of PDMS membranes in pervaporation: Effect of silicalite fillers and comparison with SBS membranes

Performance of PDMS membranes in pervaporation: Effect of silicalite fillers and comparison with SBS membranes

Influence of binding interface between active and support layers in composite PDMS membranes on permeation performance

Pervaporation separation of n-heptane/sulfur species mixtures with polydimethylsiloxane membranes

Contact Info

Product

Resources

About