铜对Mn/Al_2O_3氨还原SO_2到单质硫催化性能的影响  

EFFECT OF COPPER COMPONENT ON CATALYTIC PROPERTY OF Mn/Al_2O_3 FOR REDUCING SO_2 TO ELEMENTAL SULFUR WITH AMMONIA

作　　者：张黎明[1] 梁新义[1] 齐晓周[1] 秦永宁[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《燃料化学学报》2001年第1期83-86,共4页Journal of Fuel Chemistry and Technology

摘　　要：The catalytic performance of sulfided Mn/Al 2O 3 and Cu-Mn/Al 2O 3 catalysts for the ammonia decomposition has been studied by using a fixed-bed flow apparatus. It is found that the addition of copper component to Mn/Al 2O 3 catalyst can increase its catalytic activity for ammonia decomposition. The results of TPR indicate that the existence of copper component significantly improves the reduction of catalysts, which is beneficial to form active metal sulfide phase to catalyze the reduction of SO 2 to H 2S by hydrogen. X-ray diffraction results reveal that the Cu-Mn/Al 2O 3 catalyst (n Cu /n Mn =0.4) contains a CuMn 2O 4 phase before reaction, and displays MnS peaks after reaction.The catalytic performance of sulfided Mn/Al 2O 3 and Cu-Mn/Al 2O 3 catalysts for the ammonia decomposition has been studied by using a fixed-bed flow apparatus. It is found that the addition of copper component to Mn/Al 2O 3 catalyst can increase its catalytic activity for ammonia decomposition. The results of TPR indicate that the existence of copper component significantly improves the reduction of catalysts, which is beneficial to form active metal sulfide phase to catalyze the reduction of SO 2 to H 2S by hydrogen. X-ray diffraction results reveal that the Cu-Mn/Al 2O 3 catalyst (n Cu /n Mn =0.4) contains a CuMn 2O 4 phase before reaction, and displays MnS peaks after reaction.

关 键 词：催化性能 二氧化硫 单质硫 氨还原法 大气污染物 氧化铝载体 锰铜催化剂 

分 类 号：X511[环境科学与工程—环境工程] O643.361[理学—物理化学]