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Deactivation of hydrodesulfurization catalysts by metals deposition
Author(s) -
Ahn BumJong,
Smith J. M.
Publication year - 1984
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690300507
Subject(s) - flue gas desulfurization , hydrodesulfurization , catalysis , chemistry , thiele modulus , isothermal process , deposition (geology) , metal , chemical engineering , particle (ecology) , dibenzothiophene , inorganic chemistry , organic chemistry , thermodynamics , geology , paleontology , physics , oceanography , sediment , engineering
Abstract Primary causes of deactivation of hydrodesulfurization catalysts are partial poisoning of the interior pore surface and pore‐mouth plugging by deposition of metals from organo‐metallic compounds in the reactor feed. A model is developed to account for both causes of deactivation. It can be used to predict which occurs first: complete surface poisoning or pore‐mouth plugging. Equations are formulated for catalyst activity as a function of time for demetallization and also for desulfurization. The results depend upon particle geometry and geometry of deposited species, Thiele moduli for demetallization and desulfurization, and relative rates of desulfurization on fresh and partially poisoned catalytic surfaces. The treatment is for a single, isothermal catalyst particle.