Electrochemical hydrodechlorination of 4-chlorobiphenyl in aqueous solution using Pd-loaded cathode materials
首发时间:2008-03-17
Abstract:The electrochemical hydrodechlorination of 4-chlorobiphenyl (4-MCB) in aqueous solution containing MeOH and surfactant was investigated under constant current electrolysis by using a membrane-separated flow-though cell operated in batch-recycle modes. The effects of catalyst type, cathode substrate, cathode recycle, and catalyst loading on the conversion of 1 mM 4-MCB were evaluated. The catalyst of Pd, Pt, or Ni and several types of cathode substrates such as metallic mesh/foam and activated carbon material were tested. It was found that the Pd-loaded nickel foam was most suitable to be used as cathode for the treatment of 4-MCB due to its high performance and stability, which could rapidly dechlorinate 4-MCB to biphenyl with 94.3% conversion and 91.5% yield under constant current of 15mA after 3h electrolysis. During the electrolysis, the current efficiencies and energy consumptions were in range of 5.5-20% and 2.1-7.9 kWh昸g-1, respectively.
keywords: Electrochemical hydrodechlorination (HDC) 4-chlorobiphenyl Pd Cathode materials nickel foam
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钯修饰电极进行4-氯联苯的电化学脱氯研究
摘要:The electrochemical hydrodechlorination of 4-chlorobiphenyl (4-MCB) in aqueous solution containing MeOH and surfactant was investigated under constant current electrolysis by using a membrane-separated flow-though cell operated in batch-recycle modes. The effects of catalyst type, cathode substrate, cathode recycle, and catalyst loading on the conversion of 1 mM 4-MCB were evaluated. The catalyst of Pd, Pt, or Ni and several types of cathode substrates such as metallic mesh/foam and activated carbon material were tested. It was found that the Pd-loaded nickel foam was most suitable to be used as cathode for the treatment of 4-MCB due to its high performance and stability, which could rapidly dechlorinate 4-MCB to biphenyl with 94.3% conversion and 91.5% yield under constant current of 15mA after 3h electrolysis. During the electrolysis, the current efficiencies and energy consumptions were in range of 5.5-20% and 2.1-7.9 kWh昸g-1, respectively.
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No.1937920523212057****
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