Kinetics Research on In-situ Rapid Dechlorination of 1,4-dichlorobenzene by Microwave-assisted Raney Ni- AI Alloy Catalyst

摘要

[Objective]The research aimed to study rapid dechlorination kinetics of 1,4-dichlorobenzene(1,4-DCB)by microwave-assisted Raney Ni-Al alloy catalyst.[Method]Microwave-assisted Raney Ni-Al alloy catalyst was used for dechlorination of chlorobenzene(CB)and 1,4-DCB to analyze dechlorination kinetics of 1,4-DCB.[Result]Reductive dechlorination reaction of 1,4-DCB by microwave-assisted Raney Ni-Al alloy catalyst was in accordance of the two-order reaction kinetics.Reaction rate constants of 1,4-DCB dechlorination at 35 and 50℃were 0.037 6 and0.151 mol/(L·min),and the activation energy was 76.66 kJ/mol.By microwave-assisted Raney Ni-Al alloy catalyst,dechlorination rate of 1,4-DCB reached 90%at 10 min and 35℃.Moreover,two chlorine atoms were removed simultaneously,reaching the target of efficient dechlorination.[Conclusion]Dechlorination of polychlorinated organic compounds by microwave-assisted Raney Ni-Al alloy catalyst obtained good effect.