文献类型：期刊文献

英文题名：Impregnation of Polyethylenimine in Mesoporous Multilamellar Silica Vesicles for CO2 Capture: A Kinetic Study

作者：Zhang, Lihuo[1];Zhan, Ni[1];Jin, Qing[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

年份：2016

卷号：55

期号：20

起止页码：5885

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20162402490324);WOS:【SCI-EXPANDED(收录号:WOS:000376825300010)】；

基金：Financial support for this work is provided by the National Key Technologies R&D Program (2015BAC04B01), the National Natural Science Foundation of China (No. 91334203, 21376074), the 111 Project of China (No.B08021), Shanghai Municipal Bureau of Quality and Technical Supervision Foundation of China (No. 2015-03) and the project of FP7-PEOPLE-2013-IRSES (PIRSES-GA-2013-612230).

语种：英文

外文关键词：Kinetics - Impregnation - Mesoporous materials - Kinetic theory - Silica - Adsorption - Rate constants

摘要：Amine-impregnated solid sorbents have been approved as one of the promising sorbents for CO2 capture. However, the low adsorption rate seriously limits their real application. Herein, we, synthesized the mesoporous multilamellar silica vesicle (MMSV) and used them as a novel support for the impregnation of polyethylenimine (PEI). The mesoporous multilamellar structure, as well as the presence of surfactant templates, significantly improved the dispersion of PEI in sorbents and hence improved both adsorption capacity and adsorption rate simultaneously. Among various MMSV-PEIs samples, MMSV(a)-PEI-60% showed the best CO2 adsorption capacity, up to 4.73 mmol/g in pure and dry CO2 flow at 90 degrees C, and even exhibited a 22% enhancement in humid CO2 flow at 75 degrees C. Moreover, it also presented good adsorption/desorption cyclic performance. The kinetic study showed that the second-order kinetic model fitted quite well for dynamic CO2 adsorption, and the adsorption rate constants revealed its faster adsorption rate and higher amine efficiency compared with most reported amine-impregnated sorbents.