Enhancing ethanol production efficiency by ZIF-L/PDMS mixed matrix membrane via vapor permeation-fermentation coupling process

被引：0
|
作者：
Wang Y. [1 ]
Mao H. [1 ]
Cai W. [1 ]
Zhang A. [1 ]
Xu L. [1 ]
Zhao Z. [1 ]
机构：
[1] School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing
来源：
Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 10期
关键词：
Ethanol fermentation; Membrane separation; Mixed matrix membrane; Polydimethylsiloxane; Vapor permeation;
D O I：
10.11949/0438-1157.20210337
中图分类号：
学科分类号：
摘要：
Vapor permeation (VP) membrane separation does not have the risk of membrane fouling and has broad application prospects in the production of bioethanol. The polydimethylsiloxane (PDMS) membrane and the novel PDMS mixed matrix membrane (ZIF-L/PDMS) prepared by embedding two-dimensional zeolitic imidazolate framework-L (ZIF-L) into PDMS matrix were used as separate modules to separate ethanol from fermentation of inulin hydrolysate in a VP coupled with fermentation system(VP-fermentation). The separation performance and fermentation performance during coupling process were analyzed. The effects of separation methods, membrane types and operation conditions on the separation performance were explored. The results showed that ZIF-L/PDMS mixed matrix membrane for the separation of 5%(mass) ethanol aqueous solution by VP showed better performance than pervaporation (PV) when vapor cyclic flow was 1.5 L·min-1, and the normalized total flux and the separation factor reached 1148.78 g·m-2·h-1 and 19.14, respectively, suggesting the ethanol separation performance was significantly improved. Furthermore, the ZIF-L/PDMS membrane exhibited an impressive permeability and ethanol selectivity in VP-fermentation process. Compared with the literature reports, it achieved the best ethanol removal effect, which greatly enhanced the ethanol production efficiency. The ethanol yield and productivity reached 0.421 g·g-1 and 3.07 g·L-1·h-1, respectively, which were higher than that in independent batch fermentation. Therefore, ZIF-L/PDMS mixed matrix membrane exhibits great application potential in the in-situ removal of ethanol from fermentation. © 2021, Editorial Board of CIESC Journal. All right reserved.
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页码：5226 / 5236
页数：10
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