Ozone-enhanced catalytic oxidation of monochlorobenzene over iron oxide catalysts.
In this study, we examined the experimental catalytic oxidation of gaseous monochlorobenzene (MCBz) with O₃ over Fe₂O₃ in a packed bed reactor to investigate the feasibility of economical low temperature decomposition at a high space velocity (SV). We investigated the effects of several reaction parameters (temperature, O₃ concentration, and SV) on the MCBz oxidation. At 150°C, the conversion of MCBz over Fe₂O₃ in the absence of O₃ was only 3%; it increased to 91% over Fe₂O₃ in the presence of 1,200 ppm of O₃ at a high SV of 83 s(-1). A long-term operation study revealed that the conversion of MCBz was stable for more than 96 h. In the steady state, the carbon and chlorine balances were 88% and 86%, respectively. Applying a Langmuir-Hinshelwood kinetic model, we estimated an activation energy of 16.7 kJ mol(-1) for MCBz oxidation over Fe₂O₃ in the presence of O₃.
Graduate Institute of Environmental Engineering, National Central University, ChungLi, Taoyuan County 320, Taiwan.
Hou Chuan
HC
Wang
Hsu Shang
HS
Liang
Moo Been
MB
Chang
D000393:Air Pollutants / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control; D002384:Catalysis; D002722:Chlorobenzenes / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*; D013696:Temperature
D000393:Air Pollutants; D002722:Chlorobenzenes; D005290:Ferric Compounds; C000499:ferric oxide; D010126:Ozone; C031294:chlorobenzene