文献类型：期刊文献

英文题名：A study of surface and inner layer compositions of Mg-Fe-Al-O mixed spinel sulfur-transfer catalyst using Auger electron spectroscopy

作者：Wang, JN; Li, CL

机构：[1]E CHINA UNIV SCI & TECHNOL,PETR PROC RES CTR,SHANGHAI 200237,PEOPLES R CHINA

年份：1997

卷号：32

期号：4

起止页码：223

外文期刊名：MATERIALS LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:A1997XY29800002)】；

语种：英文

外文关键词：surface composition; segregation; sulfur-transfer catalyst; AES; spinel; MgAl2O4; Mg-Fe-Al-O

摘要：The compositions of the surface and the bulk of Mg-Fe-Al-O mixed spinel catalyst have been studied using the AES technique. The behaviour of surface segregation of the magnesium and oxygen atoms and the enrichment of iron and aluminum atoms in the bulk have been identified. It has been found that both the capacity of sulfur-capturing and the ability of sulfur species reduction for the iron-containing catalyst are much higher than that of the MgAl2O4 catalyst, which suggests that the iron element has an important role in the cycle between SO2 oxidative adsorption and sulfate reductive desorption.