Degradation of chlorobenzene by corona discharge coupled with Ce doped MnOx catalyst

Abstract

ABSTRACT Ce doped MnO2/γ-Al2O3 catalysts are prepared and analysed by BET, XRD and SEM in this paper. The degradation of chlorobenzene (CB) by a synergistic system of catalyst and DC corona discharge is further investigated to examine the effects of discharge voltage on CB removal efficiency, CO2 selectivity and by-product O3 generation. The results show that the voltage is proportional to the removal efficiency of CB and the selectivity of CO2. At a voltage of 40 kV, the CB removal efficiency and CO2 selectivity are 88% and 75%, respectively. O3 is more likely to decompose into active oxygen atoms with Ce doped MnO2/γ-Al2O3 type catalyst, and its O3 emission is about 50–250 ppm lower than that of NTP alone. In addition to studying the effect of CB treatment, the decomposition mechanism of CB is also discussed by examining the exhaust gas by GC-MS.