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Volatile organic compounds decomposition using nonthermal plasma coupled with a combination of catalysts
Article 17: Volume 8, Number 3, Summer 2011, Pages 621-630 (10) XML PDF (488 K)
Authors
T. Zhu; Y. D. Wan; J. Li; X. W. He; D. Y. Xu; X. Q. Shu; W. J. Liang; Y. Q. Jin
Abstract
A series of experiments were performed for toluene decomposition from a gaseous influent at normal temperature and atmospheric pressure by nonthermal plasma coupled with a combination of catalysts technology. Nonthermal plasma was generated by dielectric barrier discharge. ã-Al2O3 was used to be a sorbent and a catalyst carrier. Nanocatalysts were MnO2/ã-Al2O3 coupled with modified ferroelectric of nano-Ba0.8Sr0.2Zr0.1Ti0.9O3. ã-Al2O3 played an important role in prolonging reaction time of nonthermal plasma with volatile organic compounds molecules. MnO2/ã-Al2O3 has an advantage for ozone removal, while nano-Ba0.8Sr0.2Zr0.1Ti0.9O3 is a kind of good ferroelectric material for improving energy efficiency. Thus these packed materials were incorporated together to strengthen nonthermal plasma power for volatile organic compounds decomposition. The results showed the synergistic technology resulted in greater enhancement of toluene removal and energy efficiencies and a better inhibition for ozone formation in the gas exhaust. Based on the data analysis of the Fourier transforms infrared spectrum, the reaction process of toluene decomposition and the mechanism of synergistic effect are discussed. The results showed in a complex oxidation mechanism of toluene via several pathways, producing either ringretaining or ringopening products. The final products were carbon dioxide and water.
Keywords
Energy efficiency; Ferroelectric; Synergistic effect; Toluene
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