TY - JOUR
T1 - Role of nickel on vanadium poisoned FCC catalyst
T2 - A study of physiochemical properties
AU - Etim, U. J.
AU - Xu, B.
AU - Bai, P.
AU - Ullah, Rooh
AU - Subhan, F.
AU - Yan, Z.
N1 - Publisher Copyright:
© 2016 Science Press
PY - 2016/7/1
Y1 - 2016/7/1
N2 - 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, N2 adsorption, solid state MAS-NMR, SEM and H2-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.
AB - 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, N2 adsorption, solid state MAS-NMR, SEM and H2-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.
KW - Activity
KW - Contaminant metals
KW - FCC catalyst
KW - Mechanism
KW - Physiochemical properties
UR - http://www.scopus.com/inward/record.url?scp=84966769904&partnerID=8YFLogxK
U2 - 10.1016/j.jechem.2016.04.001
DO - 10.1016/j.jechem.2016.04.001
M3 - 文章
AN - SCOPUS:84966769904
SN - 2095-4956
VL - 25
SP - 667
EP - 676
JO - Journal of Energy Chemistry
JF - Journal of Energy Chemistry
IS - 4
ER -