文献类型：期刊文献

英文题名：Carbon Dioxide Capture by Amine-Impregnated Mesocellular-Foam-Containing Template

作者：Yan, Wei;Tang, Jing;Bian, Zijun;Hu, Jun[1];Liu, Honglai

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2012

卷号：51

期号：9

起止页码：3653

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20122415114092);WOS:【SCI-EXPANDED(收录号:WOS:000301099000018)】；

基金：This work is supported by the National Natural Science Foundation of China (Grant Nos. 20736002, 2011766) and the National High Technology Research and Development Program of China (Grant No. 2008AA062302).

语种：英文

外文关键词：Silica - Thermodynamic stability - Foams - Adsorption

摘要：By impregnating polyethylenimine (PEI) into silica mesocellular foam with the template remaining (MCF(a)), a novel sorbent with both high CO2 adsorption capacity and high thermal stability was obtained. The remaining P123 template in the MCF played a great role in promoting the CO2 adsorption capacity, which could be 4.5 mmol.g(-1) (adsorbent) when the amount of amine loading and the adsorption temperature were optimized as 60% and at 70 degrees C for the sample MCF(a)/PEI. Meanwhile, MCF(a)/PEI had a high thermal stability and selectivity, after 10 adsorption-desorption cycles, MCF(a)/PEI almost held a constant adsorption capacity; for different compositions of CO2 and N-2 mixed gases, it always kept a high adsorption selectivity of CO2/N-2. The mechanism of the template synergistic effect was elucidated by the result of a secondorder rate law through CO2 adsorption kinetic studies. Moreover, as predicted by the Langrnuir adsorption model with n = 2 (two active adsorption sites for one CO2 molecule), the adsorption enthalpy was calculated as about -85 kj.mol(-1), a value which belonged to typical chemical adsorption.