唐兆吉;杨占林;彭卫星;姜虹;王继锋
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A series of Mo/Ni-based hydrotreating catalysts calcined at different temperatures was prepared by impregnation method,and characterized by means of N2 adsorption-desorption,NH3-TPD and TPR techniques.The HDN performance of the catalysts was investigated in a microreactor.The results indicated that with the increase of calcination temperatures,the specific surface area of the catalysts was decreased,the average pore size was gradually increased,and the pore volume change was very small.The acid amount on the surface of the catalysts showed a tendency to ascend firstly, and then to descend with the increase of calcination temperatures, and the acid amount reached the maximum at 500 ℃. The activity of the hydrotreating catalysts was enhanced firstly and then reduced with the increase of calicination temperature,and the optimal calcination temperature was 500 ℃.On the whole,the activity of the catalysts could be improved prepared under suitable calcination temperature,and be suppressed obtained under high calcination temperature.