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《Petroleum Processing and Petrochemicals》 2010-07
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INFLUENCE OF ACTIVATION TEMPERATURE ON METAL-SUPPORT INTERACTION IN NiW/Al_2O_3 CATALYST

Nie Hong,Long Xiangyun,Liu Qinghe,Li Dadong (Research Institute of Petroleum Processing,Beijing 100083)  
The influence of activation temperature during the preparation of NiW/Al_2O_3 catalysts on the metal-support interaction was studied.Test results show that the activation temperature has significant effect on the hydrodesulfurization(HDS)activity of the catalyst when using 4,6-dimethyldibenzothiophene as model compound;the optimum activation temperature is in the range of 350℃ to 400℃,catalysts activated in this temperature range exhibited high HDS activity due to the moderate metal-support interaction and a promotion to the sulfidation of W species,which are well supported by the results of UV-Vis,H_2-TPR and XPS characterization. High temperature(450℃)activation may cause a strong metal-support interaction,which leads to the formation of Ni-Al spinel and the decomposition of Ni-W-O mixture,and that might further suppress the sulfidation of W species,as a result,the catalyst activity is reduced.
【Fund】: 国家重点基础研究发展规划“973”项目(2006CB202506)资助
【CateGory Index】: O643.36
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Chinese Journal Full-text Database 3 Hits
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【Co-citations】
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