Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 21, Issue -, Pages 932-941Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2014.04.035
Keywords
Supported CoMn oxide catalyst; Phenyl VOCs; Catalytic combustion; Active component
Funding
- Project of Chongqing Hundred Leaders in Talent Cultivation Plan of Academic Discipline
- Innovation team of environmental pollution control of CTBU
- Open Foundation from Air Environmental Modeling and Pollution Controlling Key Laboratory of Sichuan Higher Education Institutes [KFKT201304]
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Supported CoMn/AC composite oxide catalysts were prepared by a typical impregnation method at different calcination temperatures. The prepared CoMn/AC catalysts were characterized, and the catalytic activity of the prepared supported CoMn/AC oxide catalysts was also investigated by the catalytic combustion of phenyl volatile organic compounds (VOCs) (benzene, toluene, and ethylbenzene). XRD and XPS results indicated that MnCo2O4 and CoMn2O4 were the main crystal phase species in the prepared supported CoMn/AC oxide catalysts. The active components were observed to be highly dispersed and had small crystal sizes. The toluene catalytic combustion results demonstrated that the CAT350 catalyst had higher toluene catalytic combustion activity than the CTA250, CAT300, and CAT400 catalysts. The toluene catalytic combustion conversion of the CAT350 catalyst exceeded 93.5% at 235 degrees C, with a decreased toluene concentration in air of less than 130 ppm at 250 degrees C. The order of toluene catalytic activity of the supported CoMn/AC oxide catalysts was as follows: CAT250 < CAT300 approximate to CAT400 < CAT350. The catalytic combustion activity and stability of the CAT350 catalyst also increased with the increase in reaction temperature. The catalytic activity of the CAT350 catalyst was investigated to bring about the complete oxidation of benzene, ethylbenzene, and toluene. The combustibility of phenyl VOCs on the CAT350 catalyst was observed to follow the order benzene < ethylbenzene < toluene. Therefore, the differences in the phenyl VOC catalytic combustion performances of the supported CoMn/AC composite oxide catalysts can be attributed to the different physical chemistry properties of the phenyl VOC molecules and the catalyst. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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