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A series of catalysts containing nickel were prepared by impregna-tion.The activity,heat resistance and sulfur resistance of catalysts were inves-tigated using catalytic microreactor.The experimental results show that the Ni/γ-Al_2O_3 catalysts containing molybdenum or lanthanum possess higher activity,better heat resistance and sulfur resistance than Ni/γ-Al_2O_3 catalyst.The sur-face behaviour of catalysts and the role of molybdenum or lanthanum in Ni-Mo-La/γ-Al_2O_3 system have been studied by XRD,TEM,XPS and TPY.It hasbeen shown that the addition of molybdenum or lanthanum can increase theconcentration of nickel atoms on the surface of catalysts,make the crystallinegranule of nickel smaller,increase the number of active centers of nickel andaffect the electronic structure of nickel.All these avtions will improve thecatalytic activity and surface behaviour of catalllysts.
A series of catalysts containing nickel were prepared by impregna-tion. The activity, heat resistance and sulfur resistance of catalysts were in-tated using catalytic microreactor. The experimental results show that the Ni / γ-Al 2 O 3 containing compounds molybdenum or lanthanum possess higher activity , better heat resistance and sulfur resistance than Ni / γ-Al 2 O 3 catalyst. The sur-face behavior of catalysts and the role of molybdenum or lanthanum in Ni-Mo-La / γ-Al 2 O 3 system have been studied by XRD, TEM, XPS and TPY.It hasbeen shown that the addition of molybdenum or lanthanum can increase theconcentration of nickel atoms on the surface of catalysts, make the crystallinegranule of nickel smaller, increase the number of active centers of nickel andaffect the electronic structure of nickel .All these avtions will improve the catalytic activity and surface behavior of catalllysts.