Study on regeneration conditions of supported W-Ni catalyst for hydrocracking
LIU Su, JIANG Jian-hui, LI Xiu-min, YU Hai-feng
South Xinjiang Engineering Laboratory of Chemical Resources Utilization of Xinjiang Production and Construction Corps, Tarim University, Alar 843300, China
Abstract: The regeneration conditions for several kinds of deactivated W-Ni catalysts for hydrogenation are studied and the activity effects of the concerning catalysts regenerated are investigated.was prepared under various conditions by ex-situ method.The regenerated catalysts are characterized by means of TG,TPD,IR,XRD,TPR and TEM techniques in order to investigate the effects of regeneration temperature,heating rate and regeneration time on the regeneration efficiency.Results show that the deactivated W-Ni catalysts can be regenerated with excellent efficiency under the following optimum conditions:the deactivated catalysts are heated to 330℃ by a rate of 2℃/min,maintained at the temperature for 2 hours,heated again till 480℃ at a rate of 1℃/min,maintained at 480℃ for 2 hours.After regeneration,most of coke and sulfur on the catalysts have been removed,active metals have recovered effectively,and the pore structure and the acid amount of the catalysts gets the maximum restoration at the same time.And the conclusion also indicates that active metals will sinter gradually and the acid amount will descend if the temperature exceeds 480℃.In summary,regeneration of W-Ni hydrogenation catalyst can get the optimum effect only under suitable conditions.
刘速, 姜建辉, 李秀敏, 于海峰. 负载型W-Ni加氢裂化催化剂再生条件的研究[J]. 现代化工, 2019, 39(7): 101-106.
LIU Su, JIANG Jian-hui, LI Xiu-min, YU Hai-feng. Study on regeneration conditions of supported W-Ni catalyst for hydrocracking. Modern Chemical Industry, 2019, 39(7): 101-106.
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