| 微孔二氧化硅膜的制备、氢气分离以及水热稳定性研究 |
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| 引用本文： | 韦奇,李健林,宋春林,刘卫,陈初升.微孔二氧化硅膜的制备、氢气分离以及水热稳定性研究[J].无机材料学报,2004,19(1):133-139. |
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| 作者姓名： | 韦奇 李健林 宋春林 刘卫 陈初升 |
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| 作者单位： | 中国科学技术大学材料科学与工程系 合肥 230026 |
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| 基金项目： | 国家863高技术研究项目(715-006-0123) |
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| 摘 要： | 利用溶胶-凝胶法在Υ-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2.3×10-7mol·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.
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| 关 键 词： | 二氧化硅膜 氢气分离 水热稳定性 |
| 文章编号： | 1000-324X(2004)01-0133-07 |
| 收稿时间： | 2003-1-22 |
| 修稿时间： | 2003-3-3 |
Preparation, Hydrogen Separation and Hydrothermal Stability of Microporous Silica Membrane |
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| WEI Qi,LI Jian-Lin,SONG Chun-Lin,LIU Wei,CHEN Chu-Sheng.Preparation, Hydrogen Separation and Hydrothermal Stability of Microporous Silica Membrane[J].Journal of Inorganic Materials,2004,19(1):133-139. |
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| Authors: | WEI Qi LI Jian-Lin SONG Chun-Lin LIU Wei CHEN Chu-Sheng |
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| Affiliation: | Department of Materials Science & Engineering; University of Science and Technology of China; Hefei 230026; China |
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| Abstract: | Microporous silica membranes on Υ-Al2O3/α-Al2O3 porous supports were prepared by a sol-gel process, and characterized by IR, TG, FE-SEM,N2 adsorption as well as gas permeation. The H2 permeance of 2.3×10-7mol·m-2·Pa-1·s-1 and H2/CO2 separation factor of 8.0 were measured with the as-prepared membrane at 200℃. Deterioration of the membrane performance in the humid atmoshphere was observed, which can be attributed to the collapse of the pore structure caused by the reaction between surface hydroxy group and water vapor. |
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| Keywords: | silica membrane hydrogen separation hydrothermal stability |
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