文献类型：期刊文献

英文题名：High-temperature CO2 capture on Li6Zr 2O7: Experimental and modeling studies

作者：Yin, Xian-Sheng[1]; Song, Miao[1]; Zhang, Qin-Hui[1]; Yu, Jian-Guo[1]

机构：[1] State Key Lab of Chemical Engineering, College of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2010

卷号：49

期号：14

起止页码：6593

外文期刊名：Industrial and Engineering Chemistry Research

收录：EI(收录号：20111113745520)

语种：英文

外文关键词：Adsorption - Zirconium compounds - Activation energy - Carbon dioxide - Thermogravimetric analysis

摘要：The properties of CO2 adsorption on monoclinic-phase Li 6Zr2O7 (m-Li6Zr2O 7) in low CO2 concentration stream are studied and compared with tetragonal-phase Li2ZrO3 (t-Li 2ZrO3) using thermogravimetric analysis. The results indicate that because of the higher lithium content, about 86.7% capacity can be preserved for m-Li6Zr2O7 (at 1023 K) as the CO2 partial pressure decreases from 1.0 to 0.1 bar, whereas only about 3.5% capacity is preserved for t-Li2ZrO3 (at 848 K). The multicycle test of m-Li6Zr2O7 in 10% CO2 stream exhibits effective performance of CO2 uptake and release, though the capacity reduces gradually. Further, on the basis of the proposed adsorption pathway, a double exponential model is used to simulate the CO2 adsorption processes on m-Li6Zr2O 7 with the activation energy of 22.684 and 56.084 kJ/mol for CO 2 and Li+ diffusion, respectively, indicating the Li + diffusion is the limiting step in the adsorption process. ? 2010 American Chemical Society.