文献类型：期刊文献

英文题名：Oxidation of gaseous elemental mercury under ultralow voltage in a foam titanium diffusion electrochemical reactor

作者：Wang, Qing[1];Cao, Limei[1];Yang, Ji[1]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China

年份：2018

卷号：44

期号：4

起止页码：2739

外文期刊名：RESEARCH ON CHEMICAL INTERMEDIATES

收录：;EI(收录号：20180504698530);WOS:【SCI-EXPANDED(收录号:WOS:000427297000035)】；

基金：This research is based upon work supported by the National Natural Science Foun- dation of China (project no. 21307032) and the Fundamental Research Funds for the Central Universities. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the view of the supporting organizations.

语种：英文

外文关键词：Elemental mercury; Electrochemistry; Oxidation; Ultralow voltage

摘要：Flue gas from coal-fired power stations is an important source of mercury pollution. A diffusion electrochemical reactor is proposed to remove elemental mercury (Hg-0) from such gas. Experiments were carried out in a noncompartmentalized column reactor with a stainless-steel mesh cathode and foam titanium anode. When the simulated gas passes through the foam titanium, Hg-0 is oxidized. In the electrochemical process, Hg-0 first diffuses to the gas-liquid-solid three-phase interface, and the oxidized state (Hg2+) of Hg-0 enters the liquid phase after loss of electrons in the anode (solid phase). Operation at voltage of 3 V could achieve removal efficiency of 90 %. The effects of voltage, temperature, flow rate, electrolyte concentration, pH, initial concentration, and other conditions were investigated. The results show that electrochemical oxidation technology is a promising method for Hg-0 emission control in flue gas from coal-fired power stations. [GRAPHICS] .