| 1 | Role of nickel on vanadium poisoned FCC catalyst: A study of physiochemical properties显示文摘Active sites of Fluid catalytic cracking(FCC) catalyst are poisoned during operation in the FCC reactor due to causes including feedstock contaminant metals deposition.This leads to activity,selectivity and increasing coking problems,thereby raising concern to the refiner.This work investigated effect of nickel coexisting with vanadium in the FCC feedstock on the standard FCC catalyst during cracking process,in which destruction of active sites occurs as a result of the metals deposition.Laboratory simulated equilibrium catalysts(E-cats) were studied by XRD,FTIR spectroscopy,N_2 adsorption,solid state MAS-NMR,SEM and H_2-TPR.Results revealed that vanadium,above a certain concentration in the catalyst,under hydrothermal conditions,is highly detrimental to the catalyst's structure and activity.Conversely,nickel hardly affects the catalyst structure,but its co-presence in the catalyst reduces destructive effects of vanadium.The mechanism of nickel inhibition of vanadium poisoning of the catalyst is discussed. | U.J.Etim B.Xu P.Bai Rooh Ullah F.Subhan Z.Yan | 2016 | Journal of Energy Chemistry2016，25，4： | 5 |
您所在的机构暂未开通此部分的功能，请联系管理员