文献类型：期刊文献

中文题名：钙钛矿结构在CO还原SO_2催化脱硫中的作用

英文题名：ROLES OF PEROVSKITE PRECURSOR IN CATALYTIC DESULFURIZATION BY REDUCTION OF SO_2 WITH CO

作者：陈爱平[1];马建新[2];方明[3];刘毅庭[3]

机构：[1]华东理工大学技术化学物理研究所;[2]华东理工大学催化研究所;[3]香港科技大学研究中心

年份：1998

卷号：19

期号：4

起止页码：320

中文期刊名：催化学报

收录：CSTPCD;;Scopus;北大核心:【北大核心1996】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：钴酸镧;钙钛矿;脱硫;一氧化碳;二氧化硫;催化剂

外文关键词：Lanthanum cobaltate, Perovskite, Catalytic desulfurization, Carbon monoxide, Sulfur dioxide

摘要：通过对钴和镧的单一氧化物、混合氧化物及具有钙钛矿结构的复合氧化物（ＬａＣｏＯ３等）上ＣＯ还原ＳＯ２脱硫反应的活性以及钴镧氧化物在反应条件下活化过程的考察，指出钙钛矿结构促进了活性晶相Ｌａ２Ｏ２Ｓ和ＣｏＳ２的生成，增强了钴和镧在活化硫化及脱硫反应中的协同效应．
It was investigated that the change of crystal phases and the reduction courses during the activation sulfurization of samples such as Co 3O 4, La 2O 3, mixed oxide Co 3O 4 La 2O 3(pm) as well as composite oxide LaCoO 3 with perovskite structure. During the activation sulfurization of LaCoO 3, an unknown crystal phase was determined and ascribed to LaCoO 3- x S x , partially substituted by sulfur and deformed perovskite. The roles of perovskite precursor were supposed. Firstly, the perovskite precursor could induce a so called sulfurization decomposition activation route through the intermediate species LaCoO 3- x S x , and active phases La 2O 2S and CoS 2 were formed. Secondly, it could enhance the synergism between cobalt and lanthanum during the activation desulfurization of the oxides.