文献类型：期刊文献

英文题名：Modification of Fe-Mn mixed oxide COS removal sorbent by rare-earth oxides addition

作者：Zhao, Hai[1,2];Zhang, Dexiang[1];Wang, Fanfang[1];Wu, Tingting[1];Gao, Jinsheng[1]

机构：[1]E China Univ Sci & Technol, Dept Chem Engn Energy Resources, Key Lab Coal, Gasificat Minist Educ, Shanghai 200237, Peoples R China;[2]Shenyang Inst Engn, Dept Thermal Power Engn, Liaoning, Peoples R China

年份：2009

卷号：87

期号：4

起止页码：274

外文期刊名：PROCESS SAFETY AND ENVIRONMENTAL PROTECTION

收录：;EI(收录号：20092812187074);WOS:【SCI-EXPANDED(收录号:WOS:000268838400008)】；

基金：The authors thank Major State Basic Research Development Program of China for financial support for this work under Project No.2005CB221203. This study is also supported by Program for Changiiang Scholars and innovative Research Team in University (PCSIRT).

语种：英文

外文关键词：COS removal; Fe-Mn sorbent; Doping; Rare-earth oxides

摘要：In order to develop highly active sorbent for COS removal, Fe-Mn mixed oxides doped with CeO2, La2O3 or Sm2O3 were studied. The effects of these promoters on the structural properties of Fe-Mn oxides were investigated by XRD, BET, TPR and TEM techniques. XRD results revealed that the degree of crystallinity of Fe-Mn oxide phase decreased due to the addition of rare-earth oxides. Doping with CeO2, La2O3 or Sm2O3 led to an increase in BET surface area of the sample. TPR studies showed that the reactivity of the reduction of doped samples increased in the temperature range of 300-450 degrees C. in addition, the desulfurization test was performed at 325 degrees C with a gas hourly space velocity of 1000 h(-1). It was found that the addition of 3% La2O3 greatly improved the absorption sulfur capacity of the sorbent, while the sorbent doped 3% CeO2 achieved a sufficiently high purifying degree before breakthrough. (C) 2008 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.