文献类型：期刊文献

英文题名：Dynamic hydrophobic hindrance effect of zeolite@zeolitic imidazolate framework composites for CO2 capture in the presence of water

作者：Gao, Fei[1];Li, Yankai[1];Bian, Zijun[1];Hu, Jun[1];Liu, Honglai[2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Dept Chem, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：3

期号：15

起止页码：8091

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20151500728302);WOS:【SCI-EXPANDED(收录号:WOS:000352441100052)】；

基金：We sincerely thank Prof. Dongyuan Zhao for his helpful comments and suggestions. Financial supports for this study were provided by the National Basic Research Program of China (2013CB733501), the National Natural Science Foundation of China (no. 91334203, 21176066), the 111 Project of China (no. B08021), and the Fundamental Research Funds for the Central Universities of China and the project of FP7-PEOPLE-2013-IRSES (PIRSES-GA-2013-612230).

语种：英文

外文关键词：Adsorbents - Adsorption - Zeolites - Hydrophobicity

摘要：For the real industrial process of CO2 capture, it is still a great challenge for adsorbents to exhibit excellent CO2 adsorption capacity in the presence of water. By combining a pre-seeding process and a two-step temperature controlling crystallization, a zeolitic imidazolate framework (ZIF-8) shell is introduced on the commercial zeolite adsorbent (5A) core to produce a series of 5A@ZIF-8 composites with an enhanced surface hydrophobicity. Each 5A@ZIF-8 composite exhibits a dynamic hydrophobic hindrance effect for the separation of CO2 from the simulated humid flue gas (15% CO2 and 90% humidity at 298 K). Among these, the CO2 adsorption capacity and the CO2/H2O selectivity of 5A@ZIF-8(I) can be as high as 2.67 mmol g(-1) and 6.61, respectively, at the optimized adsorption time of 10 min. More importantly, over 10 adsorption-desorption cycles, there is almost no degradation of the adsorption performance. Therefore, the novel strategy of utilizing the dynamic hydrophobic hindrance effect through a core-shell structure would be a good solution for improving the CO2 separation performance in practical applications.