Fe^（3＋）（Cr^（3＋））／Fe^（2＋）混合离子制备铁铬中变催化剂  

PREPARATION OF IRON OXIDE/CHROMIUM OXIDE CATALYSTS WITH A SOLUTION OF Fe￣(3+)(Cr￣(3+))/Fe￣(2+) MIXTURE

作　　者：陈林深[1] 吕光烈[1] 凌荣国[1] 谢存智 汪小清 周学渊 

机构地区：[1]杭州大学中心实验室,衢州化学工业公司研究所

出　　处：《Chinese Journal of Catalysis》1994年第1期13-17,共5页催化学报（英文）

基　　金：浙江省自然科学基金

摘　　要：以Ｆｅ３＋（Ｃｒ３＋）／Ｆｅ２＋混合离子和氨水为原料，用共沉淀方法制备出γ－Ｆｅ２Ｏ３（Ｆｅ３Ｏ４）晶型的铁格中变催化剂，在３２５℃、５００ｈ－１、汽气比２：１条件下，ＣＯ转化率高达９７％．用高分辨透射电镜对还原后催化剂形貌的观察表明，其粒子大小分布比由α－Ｆｅ２Ｏ３还原所得Ｆｅ３Ｏ４更均匀．用该方法制备的铁路中变催化剂，已成功地在中小型合成氨厂中使用．single-phase γ-Fe2O3 (Fe3O4 ) iron oxide-chrornium oxide water gasshift catalyst was obtained by eoprecipitstion method With a solution ofFe2+, Fo3+ and Cr3+ mixture and ammonia water. The catalysts havehigh catalogic activity at low temperature. The reduced catalysts give97% conversion of CO at 325℃, a gas space velocity of 500 h-1 and asteam/dry gas ratio of 2. The submicro-structure of Fe3O4 from reducedγ-Fe2O3 and reduced α-Fe2O3 wus studied by transmission electronmicroscopy, a narrow secondary crystallite size distribution of Fe3O4from reduced γ-Fe2O3 is obscened. The iron oxide(chromium oxide catalysts prepared by this method have been successfully used in middle andsmall ammonia synthesis factory.

关 键 词：水煤气变换 催化剂 铁离子 铁 铬 

分 类 号：TQ426.8[化学工程]