钙的加入对含锆熔铁型氨合成催化剂性能的影响  

ssbauer spectroscopy study on fused iron catalysts containing Zr and Cr for ammonia synthesis

作　　者：李利民[1] 宋尚德[1] 高贵勇[1] 

机构地区：[1]郑州大学化学系,河南郑州450052

出　　处：《化学研究与应用》2005年第6期793-795,共3页Chemical Research and Application

基　　金：河南省教育厅自然科学基金资助项目(98150009)

摘　　要：Study of unreduced and reduced iron catalysts containing zirconium and calcium for ammonia synthesis has been made by using Mssbauer spectroscopy.An analysis of the Mssbauer paramaters shows that Zr4+ enters in to octahedral B sites of Fe3O4 and results in expansion of B sites.This is propitious to reduction of the catalysts.As a result of combination of Zr with Ca each other the Fe on A sites in sample containing Zr and Ca is reduced more rapidly,this is ascribed to electron conductivity.These exhibitions are more evident in the spherical catalyst cooled quickly by water.tudy of unreduced and reduced iron catalysts containing zirconium and calcium for ammonia synthesis has been made by using Mossbauer spectroscopy. An analysis of the Mossbauer paramaters shows that Zr^4＋ enters in to octahedral B sites of Fe3O4 and results in expansion of B sites. This is propitious to reduction of the catalysts. As a result of combination of Zr with Ca each other the Fe on A sites in sample containing Zr and Ca is reduced more rapidly ,this is ascribed to electron conductivity. These exhibitions are more evident in the spherical catalyst cooled quicldy by water.

关 键 词：含钙催化剂 氨合成催化剂 MOSSBAUER谱 

分 类 号：O643[理学—物理化学]