文献类型：期刊文献

英文题名：Zeolite@Mesoporous silica-supported-amine hybrids for the capture of CO2 in the presence of water

作者：Liu, Xiaowei[1];Gao, Fei[1];Xu, Jian[2];Zhou, Lihui[1];Liu, Honglai[1];Hu, Jun[1]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shanghai Inst Measurement & Testing Technol, 1500 Zhang Heng Rd, Shanghai 201203, Peoples R China

年份：2016

卷号：222

起止页码：113

外文期刊名：MICROPOROUS AND MESOPOROUS MATERIALS

收录：;EI(收录号：20154401488907);WOS:【SCI-EXPANDED(收录号:WOS:000370109400014)】；

基金：Financial supports for this study were provided by the National Basic Research Program of China (2013CB733501), the National Natural Science Foundation of China (Nos. 91334203, 21176066, 21376074), the 111 Project of China (No. B08021), the project of FP7-PEOPLE-2013-IRSES (PIRSES-GA-2013-612230), and the Fundamental Research Funds for the Central Universities of China.

语种：英文

外文关键词：Amine-modified; Zeolites; Core-shell structure; CO2 separation; Moisture

摘要：The selective capture of CO2 under humid condition for the commercial adsorbents has always been a great challenge. Here, we come up with a simple and effective solution, i.e., fabrication a shell around the commercial zeolite particle which can dynamically hinder the diffusion of water molecules into the zeolite core to maintain its good CO2 capacity even in the presence of water. By a sol gel coating process and a polyethylenimine (PEI) impregnation process, a series of 5A zeolite-based hybrids with a shell of mesoporous silica-supported-amine (5A@MSAs) were fabricated. The performance of CO2 separation from the simulated flue gas (with 15:85 v/v CO2/N-2 and moisture) was investigated by TG and MS in a flow system. Among the obtained adsorbents, 5A@MSA-30 was demonstrated to be the best candidate for CO2 capture from the simulated humid flue gas, with the CO2 uptake as high as 5.05 mmol/g at 298 K. The results of 10 cyclic adsorption/desorption operation suggested that the PEI molecules can be stably holden in the mesoporous silica shell, resulting in a remained CO2 adsorption capacity. The amine modified zeolite not only maintained but also significantly promoted the ability of CO2 capture under humid condition; therefore, it would be a promising solution for the commercial adsorbents to capture CO2 in the presence of water. (C) 2015 Elsevier Inc. All rights reserved.