Preparation of La0.8Sr0.2MnxNi1-xO3 Catalysts and the Catalytic Performance for Methane Combustion
La0.8 Sr0.2 MnxNi1-xO3(x = 1.0,0.9,0.7,0.5,0.3,0.1,0)series of catalysts were prepared with(NH4)2 CO3 as co-precipitation agent.The effect of B ion Ni doping on the catalytic performance of La0.8 Sr0.2 MnO3 for methane combustion was investigated.The catalyst activity was tested by quartz tube fixed bed micro-reactor.The catalytic properties were characterized by XRD,H2-TPR,SEM,N2-BET and TG-DSC.Experimental results show that different amount of Ni doping has great influence on the structure and catalytic activity of the catalyst.The activity and specific surface area of the catalyst increased significantly with the addition of Ni,but the activity of the catalyst decreased when Ni was added too much.Among them,when Ni=0.3,the catalyst has the best activity,the ignition temperature T10%is 362℃,the final temperature T90%is 486℃,and the specific surface area is the largest,15.18 m2·g-1.
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