Study on Sorption Behaviors of H2S by Triethanolamine-Modified Mesoporous Molecular Sieve SBA-15

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• 作者：Xiaozhong Chu ; Zhipeng Cheng ; Yijiang Zhao ; Jiming Xu ; Hui Zhong ; Weiguang Zhang ; Jinshun L眉 ; Shouyong Zhou ; Fengxia Zhu ; Yaping Zhou ; Li Zhou
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：March 21, 2012
• 年：2012
• 卷：51
• 期：11
• 页码：4407-4413
• 全文大小：395K
• 年卷期：v.51,no.11(March 21, 2012)
• ISSN：1520-5045

文摘

A key technology for natural gas vehicles is the removal of H₂S trace content from fuel. In previous studies, purification based on the adsorption principle has been proved to have low separation cost, and the selection of an adsorbent is a crucial factor in this method. To enhance H₂S sorption capacity, an ordered SBA-15 silica mesoporous material with a high specific surface area is synthesized as a carrier of triethanolamine (TEA). The mesoporous molecular sieve SBA-15 coated with a TEA film considerably enhances H₂S sorption capacity. The effects of operational variables on H₂S removal efficiency, including the amount of TEA-loading, adsorption pressure, flow rate, and fixed bed length, are investigated with a single-column adsorption apparatus. A model demonstrating H₂S dynamic sorption processes through as TEA-modified adsorbent bed is proposed. The model fits well the experimental data and can be applied to the H₂S sorption process simulation and optimal process design.