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Study of the Effects of External and Internal Diffusion on the Propane Dehydrogenation Reaction over Pt‐Sn/Al 2 O 3 Catalyst
Author(s) -
Mohagheghi M.,
Bakeri G.,
Saeedizad M.
Publication year - 2007
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200700157
Subject(s) - dehydrogenation , catalysis , diffusion , propane , chemistry , kinetic energy , thermodynamics , reaction rate , order of reaction , kinetics , mass transport , mass transfer , chemical kinetics , chemical engineering , analytical chemistry (journal) , reaction rate constant , chromatography , organic chemistry , physics , engineering , quantum mechanics , engineering physics
In the study of a reaction on a heterogeneous catalyst, external and internal mass diffusion play an important role since they can have an inherent affect on the kinetics of the reaction. Therefore, in the study of intrinsic rates of reaction, the effects of external and internal mass diffusion must be eliminated or considered prior to proper kinetic studies. In this study, the effects of external and internal mass diffusion on the propane dehydrogenation reaction over a Pt/Sn catalyst were investigated. Some experiments were performed in a laboratory scale setup and the required data was gathered. The rate of reaction was considered to be first order based on propane. External diffusion was studied using Mears' criterion and internal diffusion was investigated by the Thiele Module and the Internal Effectiveness Factor, based on experimental data.