Ni-Al_2O_3催化剂焙烧温度对丙烷催化还原NO反应性能的影响  

Effect of Calcination Temperature on Propane Selective Reduction Nitric Oxide over Ni-Al_(2)O_(3) Catalysts

作　　者：张淑娟[1] 章福祥[1] 李兰冬[1] 陈继新[1] 关乃佳[1] 

机构地区：[1]南开大学化学学院新催化材料研究所,天津300071

出　　处：《分子催化》2006年第5期446-448,共3页Journal of Molecular Catalysis(China)

基　　金：国家自然科学基金重点项目(20233030);博士点基金(20020055007)

摘　　要：The 4% Ni-Al2O3catalysts prepared by coprecipitation method calcined at different temperature was tested by propane selective catalytic reduction of nitric oxide（NO） in excess oxygen.Catalyst calcined at 550 ℃ showed the highest activity for selective catalytic reduction of NO and the NO conversion was approached to 100 % at 500 ℃.The Ni-Al2O3 catalyst was characterized by XRD,temperature-programmed reduction with H2(H2-TPR) and BET techniques.Based on the characterization results,with the increase of calcinations temperature,NiO gradually changes to the surface aluminate phase containing highly dispersed nickel metal cations in Al2O3 matrix,which was responsible for the high activity of catalyst calcined at 550 ℃.At higher calcination temperature,the decrease of surface areas results in the decrease of the activities of the catalyst for NO selective catalytic reduction by propane.The 4% Ni-Al2O3 catalysts prepared by coprecipitation method calcined at different temperature was tested by propane selective catalytic reduction of nitric oxide （NO） in excess oxygen. Catalyst calcined at 550℃ showed the highest activity for selective catalytic reduction of NO and the NO conversion was approached to 100 % at 500 ℃. The Ni-Al2O3 catalyst was characterized by XRD, temperature-programmed reduction with H2 （H2-TPR） and BET techniques. Based on the characterization results, with the increase of calcinations temperature, NiO gradually changes to the surface aluminate phase containing highly dispersed nickel metal cations in Al2O3 matrix, which was responsible for the high activity of catalyst calcined at 550 ℃. At higher calcination temperature, the decrease of surface areas results in the decrease of the activities of the catalyst for NO selective catalytic reduction by propane.

关 键 词：Ni—Al2O3 NO 选择催化还原 丙烷 

分 类 号：O643.32[理学—物理化学]