Pervaporation Separation of Thiophene-Heptane Mixtures with Polydimethylsiloxane (PDMS) Membrane for Desulfurization
Cross-linked polydimethylsiloxane (PDMS)-polyetherimide (PEI) composite membranes were prepared, in which asymmetric microporous PEI membrane prepared with phase inversion method was acted as the microporous supporting layer in the flat-plate composite membrane. Membrane characterization was conduct...
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| Veröffentlicht in: | Applied biochemistry and biotechnology 2010, Vol.160 (2), p.486-497 |
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| creator | Chen, Jian Li, Jiding Qi, Rongbin Ye, Hong Chen, Cuixian |
| description | Cross-linked polydimethylsiloxane (PDMS)-polyetherimide (PEI) composite membranes were prepared, in which asymmetric microporous PEI membrane prepared with phase inversion method was acted as the microporous supporting layer in the flat-plate composite membrane. Membrane characterization was conducted by Fourier transform infrared and scanning electronic microscopy analysis. The composite membranes were employed in pervaporation separation of n-heptane-thiophene mixtures. Effect of amount of PDMS, cross-linking temperature, amount of cross-linking agent, and cross-linking time on the separation efficiency of n-heptane-thiophene mixtures was investigated experimentally. Experiment results demonstrated that 80-100°°C of cross-linking temperature was more preferable for practical application, as the amount of cross-linking agent was up to 20 wt.%, and 25 wt.% of PDMS amount was more optimal as far as flux and sulfur enrichment factor were concerned. In addition, the swelling degree of and stableness of composite membrane during long-time operation were studied, which should be significant for practical application. |
| doi_str_mv | 10.1007/s12010-008-8368-z |
| format | Article |
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Membrane characterization was conducted by Fourier transform infrared and scanning electronic microscopy analysis. The composite membranes were employed in pervaporation separation of n-heptane-thiophene mixtures. Effect of amount of PDMS, cross-linking temperature, amount of cross-linking agent, and cross-linking time on the separation efficiency of n-heptane-thiophene mixtures was investigated experimentally. Experiment results demonstrated that 80-100°°C of cross-linking temperature was more preferable for practical application, as the amount of cross-linking agent was up to 20 wt.%, and 25 wt.% of PDMS amount was more optimal as far as flux and sulfur enrichment factor were concerned. In addition, the swelling degree of and stableness of composite membrane during long-time operation were studied, which should be significant for practical application.</description><identifier>ISSN: 0273-2289</identifier><identifier>EISSN: 1559-0291</identifier><identifier>DOI: 10.1007/s12010-008-8368-z</identifier><identifier>PMID: 18830823</identifier><identifier>CODEN: ABIBDL</identifier><language>eng</language><publisher>New York: New York : Humana Press Inc</publisher><subject>Adsorption ; Biochemistry ; Biological and medical sciences ; Biotechnology ; Chemistry ; Chemistry and Materials Science ; Cross-Linking Reagents - chemistry ; Dimethylpolysiloxanes - chemistry ; Fourier transforms ; Fundamental and applied biological sciences. 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Membrane characterization was conducted by Fourier transform infrared and scanning electronic microscopy analysis. The composite membranes were employed in pervaporation separation of n-heptane-thiophene mixtures. Effect of amount of PDMS, cross-linking temperature, amount of cross-linking agent, and cross-linking time on the separation efficiency of n-heptane-thiophene mixtures was investigated experimentally. Experiment results demonstrated that 80-100°°C of cross-linking temperature was more preferable for practical application, as the amount of cross-linking agent was up to 20 wt.%, and 25 wt.% of PDMS amount was more optimal as far as flux and sulfur enrichment factor were concerned. In addition, the swelling degree of and stableness of composite membrane during long-time operation were studied, which should be significant for practical application.</description><subject>Adsorption</subject><subject>Biochemistry</subject><subject>Biological and medical sciences</subject><subject>Biotechnology</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Cross-Linking Reagents - chemistry</subject><subject>Dimethylpolysiloxanes - chemistry</subject><subject>Fourier transforms</subject><subject>Fundamental and applied biological sciences. 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Membrane characterization was conducted by Fourier transform infrared and scanning electronic microscopy analysis. The composite membranes were employed in pervaporation separation of n-heptane-thiophene mixtures. Effect of amount of PDMS, cross-linking temperature, amount of cross-linking agent, and cross-linking time on the separation efficiency of n-heptane-thiophene mixtures was investigated experimentally. Experiment results demonstrated that 80-100°°C of cross-linking temperature was more preferable for practical application, as the amount of cross-linking agent was up to 20 wt.%, and 25 wt.% of PDMS amount was more optimal as far as flux and sulfur enrichment factor were concerned. In addition, the swelling degree of and stableness of composite membrane during long-time operation were studied, which should be significant for practical application.</abstract><cop>New York</cop><pub>New York : Humana Press Inc</pub><pmid>18830823</pmid><doi>10.1007/s12010-008-8368-z</doi><tpages>12</tpages></addata></record> |
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| ispartof | Applied biochemistry and biotechnology, 2010, Vol.160 (2), p.486-497 |
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| subjects | Adsorption Biochemistry Biological and medical sciences Biotechnology Chemistry Chemistry and Materials Science Cross-Linking Reagents - chemistry Dimethylpolysiloxanes - chemistry Fourier transforms Fundamental and applied biological sciences. Psychology Heptanes - chemistry Membranes Membranes, Artificial Sulfur Surface Properties Thiophenes - chemistry |
| title | Pervaporation Separation of Thiophene-Heptane Mixtures with Polydimethylsiloxane (PDMS) Membrane for Desulfurization |
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