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.
Hosseinpour N,Mortazavi Y,Khodadadi A A.Cumene cracking activity and enhanced regeneration of FCC catalysts comprising HY zeolite and LaBO3(B=Co,Mn,and Fe) perovskites[J].Applied Catalysis A:General,2014,487:26-35.
Zapata B,Pedraza F,Valenzuela M A.Catalyst screening for oxidative desulfurization using hydrogen peroxide[J].Catal Today,2005,106(1):219-221.
Liwen Chen,Chihyu Chou,Annan Ko.Novel efficient synthesis of β-naphthyl methyl ethyl ether using sulfated mesoporous molecular sieve Al-MCM-41[J].Appl Catal A:General,1999,178:L1-L6.
Pisarek M,Łukaszewski M,Winiarek P,et al.Influence of Cr addition to RaneyNi catalyst on hydrogenationof isophorone[J].Catalysis Communications,2008,10(2):213-216.
Zou J J,Zhang X,Kong J,et al.Hydrogenation of dicyclopentadiene over amorphous nickel alloy catalyst SRNA-4[J].Fuel,2008,87(17):3655-3659.
Hoffer B W,Moulijn J A.Hydrogenation of dinitriles on Raney-type Ni catalysts:Kinetic and mechanistic aspects[J].Applied Catalysis A:General,2009,352(1):193-201.
Chen H,Li R,Wang H,et al.Highly efficient enantio-selective hydrogenation of methyl acetoacetate over chirally modified Raney nickel catalytic system[J].Journal of Molecular Catalysis A:Chemical,2007,269(1):125-132.
Zhang Xuejun,Zhang Fuqiang,Yan Xuewu,et al.Hydrocraking of heavy oil using zeolites Y/Al-SBA-15 composites a catalyst supports[J].J Porous Mater,2008,15(2):145-150.
Li J F,Chai Y M,Liu B,et al.The catalytic performance of Ni/Al2O3 catalyst in dehydrogenation of cyclohexane[J].Applied Catalysis A:General,2014,469(17):434-441.
Shih S S,Mizrahi S,Green L A,et al.Deep desulfurization of distillates[J].I&ECR,1992,31(4):1232-1235.
Marafi M,Stanislaus A.Spent catalyst waste management:A review:Developments in hydroprocessing catalyst waste reduction and use[J].Resour Conserv Recy,2008,52(6):859-873.
Marafi M,Stanislaus A.Preparation of heavy oil hydrotreating catalyst from spent residue hydroprocessing catalysts[J].Catal Today,2008,130(2):421-428.
Hensen E J M,van der Meer Y,van Veen J A R,et al.Insight into the formation of the active phases in supported NiW hydrotreating catalysts[J].Applied Catalysis A:2007,322(1):16-32.
Duprez D,Fadili K,Barbier J.Regeneratio n of nickel catalysts deactivated by filamentous carbon[J].Industrial & Engineering Chemistry Research,1997,36(8):3180-3187.