Catalytic Dechlorination and Kinetics of o-Dichlorobenzene by Pd/Fe  

作　　者：周红艺 徐新华 汪大翚 

机构地区：[1]Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China College of Biological & Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China [2]Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China [3]Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China-Dichlorobenzene (o-DCB) was dechlorinated by Pd/Fe powder in water through catalytic reduction. The dechlorination reaction is believed to take place on the surface site of the catalyst via a pseudo-first-order reaction. The final reduction product of o-DCB is benzene. The dechlorination rate increases with the increase of bulk loading of palladium due to the increase of both the surface loading of palladium and the total surface area. Dechlorination efficiency accounts for 90% at Pd/Fe mass ratio 0.02% and metal to solution ratio about 53.3g-L-1 in 120 minutes. Dechlorination is affected by the reaction temperature, pH, Pd/Fe ratio and the addition of Pd/Fe. Ea is found to be 102.5kJ.mol-1 in the temperature ra,nge of 287-313K.

出　　处：《Chinese Journal of Chemical Engineering》2004年第4期505-509,共5页中国化学工程学报（英文版）

基　　金：the Returnee Foundation of Ministry of Education of China (No. 2002-247);Science and Technology Project of Zhejiang Province (No. 2004C34006).

摘　　要：o-Dichlorobenzene (o-DCB) was dechlorinated by Pd/Fe powder in water throughcatalytic reduction. The dechlorination reaction is believed to take place on the surface site ofthe catalyst via a pseuclo-first-order reaction. The final reduction product of o-DCB is benzene.The dechlorination rate increases with the increase of bulk loading of palladium due to the increaseof both the surface loading of palladium and the total surface area. Dechlorination efficiencyaccounts for 90% at Pd/Fe mass ratio 0.02% and metal to solution ratio about 53.3g · L^(-1) in 120minutes. Dechlorination is affected by the reaction temperature, pH, Pd/Fe ratio and the addition ofPd/Fe. E_a is found to be 102.5 kJ · mol^(-1) in the temperature range of 287—313 K.o-Dichlorobenzene (o-DCB) was dechlorinated by Pd/Fe powder in water through catalytic reduction. The dechlorination reaction is believed to take place on the surface site of the catalyst via a pseudo-first-order reaction. The final reduction product of o-DCB is benzene. The dechlorination rate increases with the increase of bulk loading of palladium due to the increase of both the surface loading of palladium and the total surface area. Dechlorination efficiency accounts for 90% at Pd/Fe mass ratio 0.02% and metal to solution ratio about 53.3 g·L^-1 in 120 minutes. Dechlorination is affected by the reaction temperature, pH, Pd/Fe ratio and the addition of Pd/Fe. Ea is found to be 102.5kJ·mol^-1 in the temperature range of 287--313K.

关 键 词：PD/FE DECHLORINATION catalytic reductive dechlorination o-DCB 

分 类 号：O643.3[理学—物理化学]