A review on removal of elemental mercury from flue gas using advanced oxidation process: Chemistry and process

被引:137
作者
Liu, Yangxian [1 ]
Adewuyi, Yusuf G. [2 ]
机构
[1] Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[2] North Carolina Agr & Tech State Univ, Chem Biol & Bioengn Dept, Greensboro, NC 27411 USA
基金
中国博士后科学基金; 美国国家科学基金会; 中国国家自然科学基金;
关键词
Hg-0; removal; Advanced oxidation technologies (AOTs); Plasma; TiO2; photocatalytic; Photochemical; Activated oxidant; DIELECTRIC-BARRIER DISCHARGE; ACTIVATED PERSULFATE OXIDATION; LIGHT PHOTOCATALYTIC ACTIVITY; TRANSFER-REACTION KINETICS; DOPED TIO2 PHOTOCATALYST; SITU-GENERATED TITANIA; ZERO-VALENT IRON; COAL-COMBUSTION; HG-0; REMOVAL; CATALYTIC-OXIDATION;
D O I
10.1016/j.cherd.2016.06.024
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Mercury emission from combustion sources has become a great public concern due to its hazards for human health and ecosystem. Although a large number of Hg-0 removal technologies already have been developed, none of them can obtain large-scale applications due to various technical and economic issues. Therefore, more efforts are needed to develop cost-effective Hg-0 removal technologies. Advanced oxidation technologies (AOTs) are defined as those technologies that can generate mainly the hydroxyl radical ((OH)-O-center dot) with high oxidation potential and other reactive oxygen species including superoxide anion radical (O-2(center dot-)) hydrogen peroxide (H2O2) and singlet oxygen, by various environmentally benign physical or chemical processes. In the past two decades, AOTs have gained an extensive attention research and successful applications in water treatment and soil remediation, as well as in flue gas purification for multipollutant treatment. In recent years, an increasing attention has been paid to the removal of Hg-0 in flue gas using AOTs due to the excellent prospects of this technology. To date, the four main AOTs for removing Hg-0 in flue gas include plasma AOTs, TiO2 photocatalytic AOTs, photochemical AOTs and activated oxidant AOTs. While these AOTs have shown excellent prospects for removing Hg-0 in flue gas, a number of technical issues need to be resolved before they are amenable to industrial applications. This article provides the first comprehensive review of the progress and recent developments of these four AOTs for removing Hg-0 in flue gas, with emphasis on the chemistry and processes involved. The effects of the main flue gas components and process parameters on Hg-0 removal using these AOTs are summarized. The reaction products, mechanism, kinetics, reactor types and process flow systems, and impacts on of Hg-0 removal are also comprehensively reviewed, with insights into the challenges for large-scale applications. This review is intended to advance our understanding and outline directions for future developments of this research field. (C) 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:199 / 250
页数:52
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