Journal
CHEMICAL ENGINEERING JOURNAL
Volume 283, Issue -, Pages 276-284Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2015.07.050
Keywords
Non-thermal plasma; Adsorption; Catalysis; Adsorption-discharge; Toluene
Categories
Funding
- National Natural Science Foundation of China [U1201231, 51378218, 51108187, 50978103]
- Natural Science Foundation of Guangdong Province, China [2014A030310431]
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The destruction of low concentrations of toluene using two non-thermal plasma catalytic systems has been investigated in this study. Metals (Ag, Mn and AgMn) loaded SBA-15 catalysts were prepared by an impregnation method and further characterized by X-ray diffraction (XRD), N-2 adsorption-desorption isotherm and H-2-temperature-programmed reduction (H-2-TPR). In our research, two types of plasma catalytic system, including continuously introduced and adsorption-discharge plasma system, were studied. The results showed that the loaded metals retained the highly ordered mesopore structure of SBA-15. The activities of as-prepared catalysts for the toluene conversion and carbon balance in both catalytic systems decreased in the following order: AgMniSBA-15 > Ag/SBA-15 > Mn/SBA-15 > SBA-15, which were consistent with the ozone decomposition activities. Compared to traditional continuously introduced plasma system, the adsorption-discharge plasma system slightly increased toluene conversion and significantly improved the carbon balance. The reaction intermediates and products in two plasma systems were detected by the GC-MS and in situ FT-IR analyses. The results showed that the types of organic byproducts detected in the adsorption-discharge system greatly decreased compared to continuously introduced system. Moreover, the different mechanisms of two systems were discussed. (C) 2015 Elsevier B.V. All rights reserved.
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