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Phenyl-Modified Microporous Silica Membranes for Hydrogen Separation and Water Gas Shift Reaction
Authors: HE Jun WEI Qi *  DUAN Xiao-Yong  YAN Jian-Ping  LI Qun-Yan  NIE Zuo-Ren
Units: College of Materials Science and Engineering, Beijing University of Technology
KeyWords: Keywords Phenyl; Microporous silica membrane; Gas separation; Hydrogen permeation
ClassificationCode:O484
year,volume(issue):pagination: 2012,32(2):65-69

Abstract:
Silica membranes were modified by phenyl groups through an acid-catalyzed co-hydrolysis and condensation of tetraethylorthosilicate (TEOS) and phenyltriethoxysilane (PTES). The hydrogen permeation and separation performance of the phenyl-modified silica membranes and their role in the water gas shift reaction were investigated in detail. The results show that the hydrogen transportation in the modified silica membranes is subjected to an activated diffusion mechanism, as demonstrated by the fact that hydrogen permeance increases with increasing temperatures. The silica membranes possess a hydrogen permeance of 4.67×10-7mol•m-2•s-1•Pa-1and a permselectivity of 10.54, 10.50 and 21.16 for H2/CO、H2/CO2 and H2/SF6 respectively at 300℃. The CO conversion of the membrane reactor is 12% higher than that of fixed-bed at a temperature of 300℃ and a H2O/CO ratio of 2:1, due to the hydrogen selective property of the modified silica membranes.

Funds:
国家863计划课题(2009AA03Z213)

AuthorIntro:
何 俊(1984-),男,硕士研究生,E-mail: hejun65074@163.com 联系人简介:韦 奇(1970-),男,博士,教授,主要从事面向洁净能源的多孔无机膜材料的研究。E-mail: qiwei@biut.edu.cn

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