Influence of catalyst particle size on reaction kinetics: Hydrogenation of ethylene on nickel

Autor:	J. W. Fulton, O. K. Crosser
Rok vydání:	1965
Předmět:	Arrhenius equation Range (particle radiation) Environmental Engineering Chemistry General Chemical Engineering Analytical chemistry chemistry.chemical_element Photochemistry Catalysis Reaction rate Chemical kinetics Nickel symbols.namesake Reaction rate constant symbols Particle size Biotechnology
Zdroj:	AIChE Journal. 11:513-520
ISSN:	1547-5905 0001-1541
DOI:	10.1002/aic.690110328
Popis:	The influence of catalyst particle size upon the reaction rate was studied for the hydrogenation of ethylene with nickel-on-alumina in a packed-bed flow reactor. A threefold increase in particle diameter through a critical size range (0.03- to 0.09-cm. diameter, corresponding to a Reynolds number of around 1) produced a thirtyfold increase in reaction rate per unit external surface area. The behavior of the system indicates that this increase was due to the influence of external gas-solid transport phenomena on the reaction kinetics. j-Factor correlations were used to calculate the catalyst surface temperatures and concentrations, which were used to calculate Arrhenius activation energies and reaction rates from available rate expressions.
Databáze:	OpenAIRE
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