DOI: 10.1016/j.jcou.2013.08.004
Scopus记录号: 2-s2.0-84889078533
论文题名: Hydrophobic modification and silver doping of silica membranes for H 2/CO2 separation
作者: Yang J. ; Chen J.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2013
卷: 2017-03-04 起始页码: 21
结束页码: 29
语种: 英语
英文关键词: Apparent activation energy
; H 2/CO2 separation
; Hydrothermal stability
; Regeneration
; Sol-gel method
Scopus关键词: Apparent activation energy
; Hydrophobic modification
; Hydrophobic precursors
; Hydrothermal stabilities
; Methyltriethoxysilane
; Pressure differences
; Regeneration
; Thermal regeneration
; Carbon dioxide
; Hydrophobicity
; Silica
; Silver
; Sol-gel process
; Membranes
英文摘要: Pure hydrophilic silica (T-SiO2), methyl-modified silica (M-SiO2) and Ag-doped methyl-modified silica (Ag/M-SiO2) membranes have been prepared by sol-gel method. The added hydrophobic precursor methyltriethoxysilane has successfully introduced CH3 groups into the M-SiO2 and Ag/M-SiO2 materials. The formed metallic silver results from the transformation of AgNO3. The methyl ligands and Ag-doped can make the mean pore size and total pore volume of silica membranes larger. The apparent activation energy for H2 permeance in T-SiO2, M-SiO2 and Ag/M-SiO2 membranes were 3.65 ± 0.10, 3.64 ± 0.08 and 3.05 ± 0.08 kJ mol -1, respectively. Compared with the T-SiO2 membrane, the H2 permeation rates of the M-SiO2 and Ag/M-SiO2 membranes increase by 34.25% and 148.34%, respectively, and the H 2/CO2 permselectivity of M-SiO2 membrane decreases by 10.93% while that of Ag/M-SiO2 membrane increases by 10.61%, when operated at 200 C and a pressure difference of 0.35 MPa. After steam treatment and thermal regeneration, Ag/M-SiO2 membranes show a much smaller change to their original values in H2 permeance and H2/CO2 permselectivity than the T-SiO2 and M-SiO2 membranes. © 2012 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53049
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Yang J.,Chen J.. Hydrophobic modification and silver doping of silica membranes for H 2/CO2 separation[J]. Journal of CO2 Utilization,2013-01-01,2017-03-04