Received June 08, 1998,Revised July 06, 1998, Accepted , Available online

Volume 12,2000,Pages 7-11

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Destruction of trichloro ethylene (C2HCl3) by pulsed corona discharge reactor packed with alumina pellets and in absence of packing was investigated. Higher conversion of C2HCl3 was observed in presence of alumina than in absence of packing. Furthermore CO/CO2 ratio in the by products was found to shift in favor of CO2 by alumina compared with absence of packing. Influence of catalyst porosity on C2HCl3 destruction and on by product ozone generation during the processing was also studied. Both alumina Ⅰ and alumina Ⅱ show similar improvement in C2HCl3 destruction. However, more important observation was that alumina Ⅰ produces higher by product ozone, while, alumina Ⅱ produces lower by product ozone, than in the case of no packing. The catalyst porosity effect was also investigated for destruction of toluene and was found to be similar. Intermediates of C2HCl3 destruction, as identified by GC MS, were COCl2, CH2Cl2CHCl3, CCl4 and C2HCl2. In presence of alumina the amount of these intermediates was much reduced, indicating the catalytic function of alumina.

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