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Dynamic hydrogenation studies in a catalytic slurry reactor
Author(s) -
Ahn BumJong,
Smith J. M.,
McCoy B. J.
Publication year - 1986
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.690320406
Subject(s) - catalysis , adsorption , cumene , chemistry , slurry , styrene , activation energy , mass transfer , reaction rate , solvent , reaction rate constant , thermodynamics , kinetics , organic chemistry , chromatography , physics , polymer , copolymer , quantum mechanics
Abstract Hydrogenation of α‐methyl styrene with Pd/Al 2 O 3 catalyst was studied in a three‐phase stirred slurry reactor. Responses to step inputs of H 2 in N 2 carrier gas provided temporal moments that allowed estimation of separate values for reversible adsorption and irreversible surface reaction rates for reactant H 2 . Mass transfer resistances are either estimated from other sources and shown to be small, or are evaluated from the flow rate dependence of the moments. The adsorption equilibrium constant for H 2 on the catalyst was measured with reaction product cumene as the solvent. For temperatures between 290 and 322 K adsorption appears to have the dominant influence on the overall rate of hydrogenation. The energy of activation for the adsorption step was found to be 8 kcal/mol.