文献类型：期刊文献

英文题名：Adsorption of alkali metal vapor from high-temperature coal-derived gas by solid sorbents

作者：Dou, Binlin[1,3]; Shen, Wenqin[2]; Gao, Jinsheng[2]; Sha, Xingzhong[2]

机构：[1]Shanghai Jiao Tong Univ, Dept Energy Engn, Shanghai 200240, Peoples R China;[2]ECUST, Dept Energy Chem Engn, Shanghai 200237, Peoples R China

年份：2003

卷号：82

期号：1

起止页码：51

外文期刊名：FUEL PROCESSING TECHNOLOGY

收录：;EI(收录号：2003247501745);WOS:【SCI-EXPANDED(收录号:WOS:000183523400004)】；

语种：英文

外文关键词：high-temperature coal-derived gas; alkali metal vapor; activated Al2O3

摘要：Seven sorbents for alkali metal removal from high-temperature coal-derived gas were tested in a fixed-bed reactor at 840 degreesC. NaCl was used as an alkali metal model compound. It was found that five sorbents, including the second grade alumina, bauxite, kaoline, acidic white clay and activated Al2O3, present higher adsorption efficiency, and activated Al2O3 shows the highest capture capacity. In capturing time of 3 h, the adsorption efficiency and sodium content absorbed by activated Al2O3 are, respectively, up to 98.20% and 6.20 mg/g. The tests indicate the removal of alkali metal vapor with activated Al2O3 is a physical adsorption process in the absence of moisture. The adsorption kinetics of activated Al2O3 with NaCl indicates that there are critical times at which adsorption constants begin to change. The critical time is at about 4-5 h. (C) 2003 Elsevier Science B.V. All rights reserved.