کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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196131 | 459832 | 2006 | 7 صفحه PDF | دانلود رایگان |
The electrochemical hydrodechlorination of 4-chlorobiphenyl (4-MCB) in aqueous solution containing methanol (MeOH), sodium acetate, acetic acid and bromide of hexadecyltrimethylammonium (CTAB) was investigated under constant current electrolysis at ambient temperature by using a membrane-separated flow-through 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. Convention hydrogenation catalysts including Pd, Pt, and Ni and several types of cathode substrates such as metallic mesh/foam and activated carbon material, were tested. It was found that the palladium-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 15 mA after 3 h electrolysis. During the electrolysis, the current efficiencies and energy consumptions were in range of 5.5–20% and 2.1–7.9 kWh kg−1, respectively.
Journal: Electrochimica Acta - Volume 52, Issue 3, 12 November 2006, Pages 1075–1081