利用溶胶-凝胶法在γ-Al2O3/α-Al2O3多孔支撑体上合成了微孔二氧化硅膜,并用IR、TG、FESEM、N2吸附以及气体渗透等手段对二氧化硅膜进行了研究.结果表明,200℃时H2的渗透率达到2.3×10-7mo1.m-2.Pa-1.s-1,H2/CO2的分离系数为8.0,然而当二氧化硅膜长期暴露于潮湿环境时,由于水气与孔表面羟基相互作用引起二氧化硅膜孔结构的崩溃,最终导致H2渗透率和H2/CO2分离系数剧烈下降.
参考文献
[1] | Renate de Vos, High-Selectivity, High-Flux Silica Membranes for Gas Separation, PhD thesis, Enschede:University of Twente, 1998. 32-45. |
[2] | Nijmeijer A. Hydrogen Selective Silica Membranes for use in Membrane Steam Reforming, PhD Thesis, Enschede: University of Twente, 1999. 7-9. |
[3] | Kikuchi E. Catalysis Today, 2000, 56: 97-101. |
[4] | Ismail A F, David L I B. J. Membr. Sci., 2001, 193: 1-18. |
[5] | Fuertes A B, Centeno T A. Carbon, 1999, 37: 679-684. |
[6] | Tuan V A, Li S, Falconer J L, et al, Chem. Mater., 2002, 144: 489-492. |
[7] | Munoz T, Balkus K J. J. Am. Chem. Soc., 1999, 121: 139-146. |
[8] | Diniz da Costa J C, Lua G Q, Rudolph V, et al. J. Membr. Sci., 2002, 198: 9-21. |
[9] | Renate M de Vos, Verweij Henk. Science, 1998, 179: 1710-1711. |
[10] | Chung-Yi Tsai, Siu-Yue Tam, Lu Yunfeng, et al. J. Membr. Sci., 2000, 169: 255-268. |
[11] | Renate M de Vos, Wilhelm F Maierb, Verweij Henk. J. Membr. Sci., 1999, 158: 277-288. |
[12] | Takei T, Yamazaki A, Watanabe T, et al. J. Coll. Interf. Sci., 1997, 188: 409-415. |
[13] | Vacher R, Woignier T, Pelous J, et al. Phys. Rev. B, 1998, 27: 6500-6505. |
[14] | Wagh P B, Ingale S V. Ceramics International, 2002, 28: 43-50. |
[15] | Iler R K. The Chemistry of Silica, New York: Wiley, 1979. 102-106. |
[16] | Cauvel A, Brunel D, Renzo F D, et al. Langmuir, 1997, 13: 2773-2778. |
[17] | Turov V V, Mironyuk I F. Colloids and Surfaces. A, 1998, 134: 257-263. |
[18] | Venkateswara Rao A, Haranath D. Microporous and Mesoporous Materials, 1999, 30: 267-273. |
[19] | Venkateswara Rao A, Manish M K. Mater. Chem. Physics, 2002, 77: 819-825. |
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