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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 12, No. 11, 2015, pp. 3531-3540
Bioline Code: st15331
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 12, No. 11, 2015, pp. 3531-3540

 en Catalytic behavior and synergistic effect of nonthermal plasma and CuO/AC catalyst for benzene destruction
He, C.; Cao, L.; Liu, X.; Fu, W. & Zhao, J.

Abstract

Nonthermal plasma-catalysis hybrid technology (NTP-C) operated at ambient temperature and pressure offers an innovative and effective approach to solving the problem of dilute volatile organic compounds pollution. Herein, the destruction of benzene (50–450 ppm) over an in-plasma NTP-C composite system was investigated. The AOx/active carbon (AOx/AC), AOx/3A molecular sieve (AOx/MS), and AOx/γ-Al2O3 (A = Fe, Ag, Zn, Mn, and Cu) catalysts were prepared by the incipientwetness impregnation method. The destruction performances of NTP alone and NTP-C are compared under different reaction conditions, such as inlet reactant concentration, catalyst type, and energy density. AC exhibits the best benzene removal efficiency among three catalyst supports, and the performances of AOx/AC under different conditions follow the trend of CuO/AC>MnO/ AC>MnO2/AC>Fe2O3/AC[AC>ZnO/AC>Ag2O/ AC. The NTP with CuO/AC system exhibits the highest benzene elimination capability with almost 90.6 % inlet benzene removed at energy density of 70 and 270 J L-1. The strong adsorption ability of AC and the optimal catalytic ability of crystalline structure of CuO on the AC support may be contributed to the excellent performance of CuO/AC. It is found that the NOx by-product also can be well controlled over NTP-CuO/AC system. Additionally, the surface of CuO/AC is more slipperier and homogeneous with the reaction proceeding, indicating higher stability of CuO/AC.

Keywords
Nonthermal plasma; Benzene; CuO/AC; Reaction conditions; Synergistic effect

 
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