《Table 1 Te xtural prope rtie s of various catalysts》

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《SiO_2和Al_2O_3负载的Ni基催化剂在甲烷干重整中的催化性能差异（英文）》

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In the present w ork，it has been demonstrated that the Ni/Al2O3catalyst exhibits higher stability in DRM，w ith less amount but more reactive coke deposits after 50 h reaction，w hich should be ascribed to the small Ni particles and strong metal-support interaction，as illustrated by the scheme in Figure 8.The randomly connected large pore channels w hich can provide the space for the grow th of particles and the w eak metal-support interaction w hich cannot hinder the migration and agglomeration of Ni particles are the tw o reasons for the Ni/SiO2catalyst w ith large Ni particles；the large Ni particles may further grow up during the reaction and suffers from sever coke deposits，resulting in the decrease in catalytic performance during reaction.In contrast，the Ni/Al2O3catalyst has small pore channels，w hich may contribute to the formation of small Ni particles；the interaction betw een Ni and Al2O3can be strengthened not only by the small Ni particles，but also by the formation of NiAlxOyspecies.Generally，the NiAlxOy spinels can be easily formed but cannot be readily reduced；the formed spinels can reduce the amount of active Ni species，leading to a low activity but better coke resistance for the reforming reaction[39].In other w ords，the formed NiAlxOy（invalid Ni species，w hich cannot be reduced under current conditions）w ith extra strong interaction should be responsible for the low er catalytic activity but better stability of the Ni/Al2O3catalyst.