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On the stepwise change of activation energies in the hydrodechlorination of chlorobenzene over supported nickel

Paper ID Volume ID Publish Year Pages File Format Full-Text
52055 46864 2008 4 PDF Available
Title
On the stepwise change of activation energies in the hydrodechlorination of chlorobenzene over supported nickel
Abstract

Kinetics of chlorobenzene hydrodechlorination have been measured over Ni on SiO2, Al2O3, MgO, activated carbon and graphite. A stepwise variation of Ea is analysed using the selective energy transfer model where Ea is identified as the vibrational energy associated with an excitation of the chlorobenzene out-of-plane C–H bending mode. Variation of Ea with vibrational quantum number yields a vibrational frequency of 749 cm−1 and a value (−1.1 cm−1) for the anharmonicity term, which is characteristic of bending vibrational modes. Our analysis suggests that the reacting species are weakly adsorbed on the catalyst: heat of adsorption = −0.31 kJ mol−1.

Keywords
Selective energy transfer model; Catalytic hydrodechlorination; Chlorobenzene; Apparent activation energy; Anharmonicity; Heat of adsorption
First Page Preview
On the stepwise change of activation energies in the hydrodechlorination of chlorobenzene over supported nickel
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 9, Issue 3, 1 March 2008, Pages 333–336
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis