A new strategy for determination of current efficiency during electro-oxidation of aromatic compounds in a packed-bed system

作者：Wang, Lizhang^*; Zhao, Yuemin; Gao, Qingyu; Qian, Cheng; Hu, Yunlong

来源：Water Science and Technology, 2011, 63(11): 2685-2691.

DOI：10.2166/wst.2011.498

• aromatic compound
• current efficiency
• electro-oxidation
• PBEs

The electro-oxidation of aromatic compounds in 4,4'-diaminostilbene-2,2'-disulfonic (DSD) acid wastewater on IrO2-Ta2O5/Ti anodes was studied. The current efficiency was evaluated in terms of chemical oxygen demand (COD) by introducing a new factor, the fraction of the Faradaic current to the total cell current (beta) through the network analysis of packed bed electrode system (PBEs). Experimental results using an up-flow PBEs at current intensities ranging from 5 to 16 A m(-2), flow rates ranging from 20 to 80 L h(-1) and inter-electrode distance of 5 to 50 cm are in good agreement with the proposed equation. In addition, lower current density, increasing flow rate and larger inter-electrode distance are beneficial to enhance the current efficiency.

• 出版日期2011
• 单位中国矿业大学（北京）