Catalyst deactivation due to deposition of reaction products in macropores during hydroprocessing of petroleum residuals

Journal Article · Tue Apr 01 04:00:00 EST 1986 · Ind. Eng. Chem. Process Des. Dev.; (United States)

DOI:https://doi.org/10.1021/i200033a015· OSTI ID:5837615

Khang, S J; Mosby, J F

A pore-filling model is proposed to describe deactivation of hydroprocessing catalysts of a wide-pore structure in well-mixed and plug-flow reactors where the catalyst pellets are deactivated due to slow and uniform deposition of reaction products (mostly metal compounds) in their macropores. The model based on no mass-transfer restriction in the main channels of the pores incorporates additional active sites created by metal compounds in the deposited layers and has been shown to have two parameters of the similar type of the Thiele modulus. The model along with lumped reaction kinetics is applied for hydroprocessing reactions in trickle-bed reactors and provides reasonable deactivation curves for desulfurization and demetallation reaction when less than 50% of the original pore volume is filled with metal compounds.

• Research Organization: Chemical and Nuclear Enineering Department, University of Cincinnati, Cincinnati, OH 45221
• OSTI ID: 5837615
• Journal Information: Ind. Eng. Chem. Process Des. Dev.; (United States), Journal Name: Ind. Eng. Chem. Process Des. Dev.; (United States) Vol. 25:2; ISSN IEPDA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
CATALYSTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMICAL REACTORS
CRACKING
DEACTIVATION
DECOMPOSITION
DEMETALLIZATION
DEPOSITION
DESULFURIZATION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCRACKING
KINETICS
METALS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM RESIDUES
POROSITY
PYROLYSIS
REACTION KINETICS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
YIELDS