点击次数：

论文类型：期刊论文

发表时间：2014-04-01

发表刊物：CHEMICAL ENGINEERING JOURNAL

收录刊物：SCIE、EI、Scopus

卷号：241

页面范围：167-174

ISSN号：1385-8947

关键字：Hydrogen gas production; Phenol; Electrochemical oxidation degradation; Kinetic; Energy efficiency

摘要：Hydrogen gas production coupled with phenol electrochemical oxidation was investigated in a novel two-region equipment. The phenol degradation, COD removal, hydrogen production, kinetic, Instantaneous Current Efficiency for COD removal (ICECOD), and hydrogen gas yield (Y-H2) of simulated phenol solution electrochemical oxidation degradation at 3 V applied voltage were surveyed. The results indicated that three stages were observed during the electrochemical oxidation of simulated phenol in this study. The kinetic study showed that first order model well described each stage of phenol electrochemical oxidation process. The ICECOD increased slightly at the initial stage, and dramatically at the second stage, while fell at the finally stage, indicating water molecules were finally participated in the formation of hydrogen due to the degradation of phenol and COD. Hydrogen products from redox reaction of H+ which release from the degradation of organics oxidation reaction at the anode. Furthermore, the mechanism was discussed and showed that phenol transformed into benzoquinone intermediate in the first step, then the ring was broken and further oxidized into organic compounds like muconic acid, maleic acid or oxalic acid as intermediates in the followed stage, and finally disintegrated into CO2 and H2O in electrochemical oxidation process, which demonstrated by the UV and LC-MS images analysis. It could be seen that hydrogen gas production coupled with organic wastewaters electrochemical oxidation would be an effective approach for energy recovery and wastewater reutilization. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.