文献类型：期刊文献

英文题名：Analysis of CO₂ Sorption/Desorption Kinetic Behaviors and Reaction Mechanisms on Li₄SiO₄

作者：Zhang Qi[1];Han Daying[1];Liu Yang[1];Ye Qian[1];Zhu Zibin[1]

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

年份：2013

卷号：59

期号：3

起止页码：901

外文期刊名：AICHE JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000317465700020)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Grant No. 21176080), the Natural Science Foundation of Shanghai (Grant No. 09ZR1407600), and the Fundamental Research Funds for the Central Universities. The authors thank Mr. Qinghui Zhang for the help of ploting.

语种：英文

外文关键词：CO2 sorption/desorption process; Li4SiO4; kinetic model; steam

摘要：The CO2 sorption/desorption kinetic behaviors on Li4SiO4 were analyzed. The theoretical compositions of the sorption/desorption reactions were calculated using FactSage. The sorption/desorption process on Li4SiO4 was investigated by comparing the shrinking core, double exponential, and Avrami-Erofeev models. The Avrami-Erofeev model fits the kinetic thermogravimetric experimental data well and, together with the double-shell mechanism, clearly explains the sorption/desorption mechanism. The sorption process is limited by the rate of the formation and growth of the crystals with double-shell structure consisting of Li2CO3 and Li2SiO3. The whole desorption process is found to be controlled by the rate of the formation and growth of the Li4SiO4 crystals. Furthermore, the influence of steam on the CO2 sorption process was analyzed. It has been observed that the presence of steam enhance the mobility of Li and, therefore, the rate of diffusion control stage. (C) 2012 American Institute of Chemical Engineers AIChE J, 59: 901-911, 2013