Synthesis, physicochemical characterizations and catalytic performance of Pd/carbon-zeolite and Pd/carbon-CeO2 nanocatalysts used for total oxidation of xylene at low temperatures

Frontiers of Environmental Science & Engineering, June 2013, Volume 7, Issue 3, pp 365-381
Synthesis, physicochemical characterizations and catalytic performance of Pd/carbon-zeolite and Pd/carbon-CeO2 nanocatalysts used for total oxidation of xylene at low temperatures
Zeinab Jamalzadeh, Mohammad Haghighi, Nazli Asgari
1. Chemical Engineering Faculty, Sahand University of Technology, Tabriz, 5331711111, Iran
2. Reactor and Catalysis Research Center (RCRC), Sahand University of Technology, Tabriz, 5331711111, Iran
Abstract
Reports a study of xylene removal from waste gas streams via catalytic oxidation over Pd/carbon-zeolite and Pd/carbon-CeO₂ nanocatalysts.
Researchers obtained activated carbon from pine cone chemically activated using ZnCl₂ and modified by H₃PO₄. They modified natural zeolite of clinoptilolite by acid treatment with HCl. Nano-ceria was synthesized via the redox method. Mixed supports of carbon-zeolite and carbonceria were prepared and palladium was dispersed over them via impregnation method. Characterization of the nanocatalysts exhibited a good morphology with an average particle size in a nano range, and confirmed the formation of nano-ceria with an average crystallite size below 60 nm. According to the reaction data, the synthesized catalysts have been shown to be very effective in the removal of volatile organic compounds (VOCs). Authors propose a reaction network for catalytic oxidation of xylene over nanocatalysts.
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