| 超枝化固体胺吸附分离烟气中二氧化碳 |
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| 引用本文： | 刘亚敏,史晶金,陈杰,施耀. 超枝化固体胺吸附分离烟气中二氧化碳[J]. 化工学报, 2011, 62(3): 736-742 |
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| 作者姓名： | 刘亚敏 史晶金 陈杰 施耀 |
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| 作者单位： | 浙江大学工学部化学工程与生物工程系工业生态与环境研究所 |
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| 摘 要： | 采用浸渍方法将四乙烯五胺（TEPA）负载到KIT-6介孔硅材料孔道表面上合成超枝化固体胺KIT-6(TEPA)，并对其吸附CO2性能进行研究。结果表明，随着温度的升高，KIT-6(TEPA)的CO2吸附量呈增长趋势，343 K时获得最大吸附量（3.1 mmol·g-1）。继续升高温度吸附量则呈下降趋势。KIT-6(TEPA)吸附CO2过程以化学吸附为主，化学吸附量占总吸附量的97.2%以上（323关 键 词： | KIT-6 CO2 吸附 四乙烯五胺 固体胺 |
Adsorption separation of CO2 from flue gas by hyperbranched solid-amine |
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| LIU Yamin,SHI Jingjin,CHEN Jie,SHI Yao. Adsorption separation of CO2 from flue gas by hyperbranched solid-amine[J]. Journal of Chemical Industry and Engineering(China), 2011, 62(3): 736-742 |
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| Authors: | LIU Yamin SHI Jingjin CHEN Jie SHI Yao |
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| Abstract: | Hyperbranched solid amine was prepared with KIT-6 type mesoporous silica, which was modified by tetraethylenepentamine (TEPA)using post-synthetic impregnation.The adsorption behavior of CO2 on KIT-6(TEPA)was investigated using an adsorption column.The adsorption capacity of KIT-6(TEPA)for CO2 increased with temperature at 303—343 K, but decreased as temperature increased at 343—353 K.The maximum adsorption capacity is 3.1 mmol·g-1 at 343 K. The mechanism of CO2 adsorption on KIT-6(TEPA)is mainly chemical adsorption.The adsorption capacity is improved by moisture.It reaches 3.5 mmol·g-1 in the presence of 12% water.The adsorption capacity is maintained after 20 cycles of adsorption and regeneration, indicating that the KIT-6(TEPA)is stable in a prolonged cyclic operation.Experimental breakthrough curves are fitted with a deactivation model, giving good agreement with experimental data. |
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| Keywords: | KIT-6 CO2 |
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