Catalytic dechlorination kinetics of p-dichlorobenzene over Pd/Fe catalysts.
p-Dichlorobenzene (p-DCB) was dechlorinated using Pd/Fe bimetallic catalytic reductants synthesized by chemical deposition. Batch experiments demonstrated that the Pd/Fe bimetallic particles could effectively dechlorinate p-DCB, p-DCB and its intermediate chlorobenzene were removed completely at a Pd loading of 0.02% (weight ratio of Pd to Fe) and Pd/Fe power to solution ratio about 4g 75 ml-1 in 90 min. Dechlorination was affected by various factors such as the reaction temperature, pH, Pd loading percentage over Fe and the introduction of Pd/Fe catalysts et al. Chlorobenzene represents partially stable dechlorinated intermediates in the generation of benzene and part of p-DCB was dechlorinated to benzene indirectly on the surface of Pd/Fe. The dechlorination of p-DCB took place on the surface of the Pd/Fe bimetallic particles in a pseudo-first-order reaction, the activation energy of the dechlorination reaction was determined to be 80.0 kJ mol-1 at the temperature range of 287-313 K.
Xu
Xinhua
X
Department of Environmental Engineering, Zhejiang University, Academic Building 10, Yuquan Campus, Hangzhou 310027, People's Republic of China. xhxu@hzcnc.com
Zhou
Hongyi
H
He
Ping
P
Wang
Dahui
D
D002384:Catalysis; D017606:Chlorine Compounds / Q000737:chemistry*; D002722:Chlorobenzenes / Q000737:chemistry*; D004785:Environmental Pollutants; D007306:Insecticides / Q000737:chemistry*; D007501:Iron / Q000737:chemistry; D007700:Kinetics; D007854:Lead / Q000737:chemistry; D013696:Temperature
D017606:Chlorine Compounds; D002722:Chlorobenzenes; D004785:Environmental Pollutants; D007306:Insecticides; D007854:Lead; C018511:4-dichlorobenzene; D007501:Iron