摘要
针对燃煤电厂烟气中的单质汞(Hg0)氧化技术,综述了改性SCR(选择性催化还原法)催化剂对Hg0催化氧化的研究进展,着重阐述了金属氧化物及氯化物掺杂对改性SCR催化剂催化氧化Hg0性能的影响;探讨了改性物质、掺杂比、烟气组分、温度等对各改性SCR催化剂催化氧化Hg0性能的影响;从掺杂元素和烟气气氛两方面综合分析了改性SCR催化剂催化氧化Hg0的异相反应机理。结合目前研究中存在的问题,提出改性SCR催化剂今后的研究方向,并对试验手段提出建议。
Targeting the oxidation of elemental mercury（ Hg^0） in the flue gas from coal-fired power plant, the research progress of the catalytic oxidation by modified selected catalytic reduction（ SCR） catalysts for elemental mercury was reviewed, focusing on the influence of metal oxides or chlorides doped SCR catalysts on elemental mercury oxidation. The activity of modified SCR catalysts for elemental mercury was explored from the effects of dopant, doping ratio, flue gas components and temperature. In addition, the heterogeneous reaction mechanisms between elemental mercury and the modified SCR catalysts were analyzed synthetically with respects to doping elements and flue gas conditions. Finally, considering the current situation of coal-fired plants, the prospects of future studies on modified SCR catalyst and the relevant experimental methods were proposed.
作者
秦亚迪
王淑娟
禚玉群
QIN Yadi;WANG Shujuan;ZHUO Yuqun(Key Laboratory of Thermal Science and Power Engineering of the Ministry of Education,Tsinghua University,Beijing 100084,China;Beijing Engineering Research Center for Ecological Restoration and Carbon Fixation of Saline-Alkaline and Desert Land,Beijing 100084,China)
出处
《环境工程技术学报》
CAS
2018年第5期539-545,共7页
Journal of Environmental Engineering Technology
基金
国家自然科学基金项目(51776107)
关键词
燃煤烟气
Hg^0
SCR催化剂
改性
催化氧化
coal-fired flue gas
elemental mercury （Hg^0）
SCR catalyst
modification
catalytic oxidation
作者简介
秦亚迪（1994-），女，硕士研究生，主要从事汞的催化氧化研究，qyd15@mails.tsinghua.edu.cn;责任作者：禚玉群（1969-），男，研究员，博士，长期从事煤燃烧污染物排放和控制方面的基础研究及应用技术开发，zhuoyq@tsinghua.edu.cn
