Kinetics of ο-Chloronitrobenzene Hydrogenation on Palladium/Carbon Catalyst

Abstract:

A 2 wt % Pd/C catalyst has been prepared by chemical impregnation and used to catalyze the hydrogenation of o-chloronitrobenzene (o-CNB) to o-chloroaniline (o-CAN) in solvent-free conditions. The effects of reaction temperature, H₂ pressure, and stirring intensity on the hydrogenation kinetics have been investigated. The hydrogenation reaction showed very high selectivity with dehalogenation side products as low as 0.3% of total yield. The favorable reaction conditions were found to be temperature T = 383 K, stirring speed = 900 rpm, and feeding ratio CNB/catalyst = 200/1 (m/m). The recycled Pd/C still retained more than 98% of its original selectivity after 12 repeat used, indicating the catalyst had strong potentials for commercial application at industrial scale.

• Periodical: Advanced Materials Research (Volumes 239-242)
• Pages: 161-167
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.239-242.161
• Online since: May 2011
• Authors: Xiao Zhen Wang, Yi Feng Zhu, Xiao Nian Li
• Keywords: Activation Energy, Catalytic Hydrogenation, Kinetic, Ο-Chloroaniline

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