Role of nickel on vanadium poisoned FCC catalyst: A study of physiochemical properties

U. J. Etim, B. Xu, P. Bai, Rooh Ullah, F. Subhan, Z. Yan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)667-676
Number of pages10
JournalJournal of Energy Chemistry
Volume25
Issue number4
DOIs
StatePublished - 1 Jul 2016
Externally publishedYes

Keywords

  • Activity
  • Contaminant metals
  • FCC catalyst
  • Mechanism
  • Physiochemical properties

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