Experiments and simulation of transport and separation of gas mixtures in carbon molecular sieve membranes

被引:101
作者
Sedigh, MG [1 ]
Onstot, WJ [1 ]
Xu, LF [1 ]
Peng, WL [1 ]
Tsotsis, TT [1 ]
Sahimi, M [1 ]
机构
[1] Univ So Calif, Dept Chem Engn, Los Angeles, CA 90089 USA
关键词
D O I
10.1021/jp982075j
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We report here the results of our recent studies describing the preparation of carbon molecular sieve membranes, their separation and transport characteristics with gas mixtures, and their molecular simulation. Poly(furfuryl alcohol) (PFFA) was used as the polymeric precursor for the preparation of the carbon films. The membranes were tested using single gases H-2, CO2 CO,CH4, and Ar, as well as binary mixtures of CO2/CH4 and a four-gas mixture consisting of CO2/CO/H-2/CH4. Separation factors for CO2/CH4 in the range of 34-37 were obtained for the binary and, the;four-gas mixtures. The membrane permeance decreased slowly during continuous testing with the four-gas mixture. This decline in performance was found, however, to be reversible. The initial membrane permeance was recovered by heating the membrane in an inert atmosphere of Ar. Modeling of the membrane's transport characteristics was carried out using a nonequilibrium molecular dynamics simulation. The modeling results agree qualitatively with the experimental data.
引用
收藏
页码:8580 / 8589
页数:10
相关论文
共 46 条
[41]   GAS-TRANSPORT AND SEPARATION WITH CERAMIC MEMBRANES .1. MULTILAYER DIFFUSION AND CAPILLARY CONDENSATION [J].
UHLHORN, RJR ;
KEIZER, K ;
BURGGRAAF, AJ .
JOURNAL OF MEMBRANE SCIENCE, 1992, 66 (2-3) :259-269
[42]   CHARACTERIZATION OF HYDROGEN-PERMSELECTIVE MICROPOROUS CERAMIC MEMBRANES [J].
WU, JCS ;
SABOL, H ;
SMITH, GW ;
FLOWERS, DL ;
LIU, PKT .
JOURNAL OF MEMBRANE SCIENCE, 1994, 96 (03) :275-287
[43]   Nonequilibrium molecular dynamics simulation of transport of gas mixtures in nanopores [J].
Xu, LF ;
Sedigh, MG ;
Sahimi, M ;
Tsotsis, TT .
PHYSICAL REVIEW LETTERS, 1998, 80 (16) :3511-3514
[44]   SYNTHESIS OF AN A-TYPE ZEOLITE MEMBRANE ON SILICON-OXIDE FILM-SILICON, QUARTZ PLATE AND QUARTZ FIBER FILTER [J].
YAMAZAKI, S ;
TSUTSUMI, K .
MICROPOROUS MATERIALS, 1995, 4 (2-3) :205-212
[45]   Effects of poly(vinyl alcohol) content and calcination temperature on the characteristics of unsupported alumina membrane [J].
Yang, WP ;
Shyu, SS ;
Lee, ES ;
Chao, AC .
SEPARATION SCIENCE AND TECHNOLOGY, 1996, 31 (09) :1327-1343
[46]   HYDROLYSIS OF ALUMINUM ALKOXIDES AND BAYERITE CONVERSION [J].
YOLDAS, BE .
JOURNAL OF APPLIED CHEMISTRY AND BIOTECHNOLOGY, 1973, 23 (11) :803-809