文献类型：期刊文献

英文题名：Utilization of CO2 as carbon source for preparation of sandy Al(OH)3 in concentrated KAl(OH)4 solutions: a kinetic study

作者：Liu, Cheng-Lin[1];Jiang, You-Fa[1];Wang, Dan[1];Song, Xing-Fu[1];Yu, Jian-Guo[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, State Key Lab Chem Engn, Shanghai, Peoples R China

年份：2019

卷号：41

期号：20

起止页码：2507

外文期刊名：ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS

收录：;EI(收录号：20190406412312);WOS:【SCI-EXPANDED(收录号:WOS:000483913300008)】；

语种：英文

外文关键词：Aluminum hydroxide; carbonation; kinetics; potassium aluminate; carbon capture

摘要：The emission of CO2 have led to the vital climate change commonly referred to global warming. Carbonation decomposition of potassium aluminate solutions is adopted for carbon capture and production of Al(OH)(3) in this study. The influence of temperature in the range from 60 degrees C to 90 degrees C, caustic concentration in the range from 220 K2O L-1 to 280 g K2O L-1 and CO2 concentration in the range from 10% to 50% on the precipitation ratio and crystal size distribution of Al(OH)(3) was investigated. The results indicated that the carbonation process of potassium aluminate can be divided into three periods, and the carbonation time decreased with the increase of the reaction temperature and CO2 concentration or reduction of the caustic concentration. The kinetic model of carbonation decomposition of potassium aluminate solution is established based on the experimental results. By the comprehensive analysis above, the apparent activation energy is 59.35 kJ mol(-1), demonstrating that the carbonation decomposition of potassium aluminate solution is easier than that of sodium aluminate solution.