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Kinetic analysis of the liquid phase hydrogenation of 2‐ethyl‐hexenal in the presence of supported Ni, Pd and Ni‐S catalysts
Author(s) -
Smedler Gudmund
Publication year - 1989
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450670109
Subject(s) - catalysis , chemistry , hydrogen , nickel , hexanal , adsorption , inorganic chemistry , kinetics , phase (matter) , liquid phase , organic chemistry , thermodynamics , physics , quantum mechanics
The kinetics of the consecutive hydrogenation reactions 2‐ethyl‐hexenal → 2‐ethyl‐hexanal → 2‐ethyl‐hexanol were studied in the liquid phase in presence of commercial Ni, Pd and Ni‐S catalysts. The Pd and Ni‐S catalysts were extremely selective with respect to the formation of 2‐ethyl‐hexanal, while the full reaction sequence was readily catalyzed by nickel. A Langmuir‐Hinshelwood model with dissociative hydrogen adsorption was found to be the most probable model, for all three catalysts. The proposal of dissociative hydrogen adsorption of the Ni‐S catalyst was supported by an independent gas‐phase experiment, using the H 2 / D 2 exchange reaction as a model reaction for the hydrogen àdsorption process.