锰掺杂SnO2复合材料对烟气零价汞的去除研究  

Removal of Hg0 in flue gas from Mn-doped SnO2 composites

作　　者：马永鹏[1] 母佰龙 苗善智 李博 赵子敬 杨波 MA Yongpeng;MU Bailong;MIAO Shanzhi;LI Bo;ZHAO Zijing;YANG Bo(Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration,School of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou Henan 450001;Weifang Anjian Safety Technology Consulting Co.,Ltd.,Weifang Shandong 261061)

机构地区：[1]郑州轻工业学院环境污染治理与生态修复河南省协同创新中心,材料与化学工程学院,河南郑州450001 [2]潍坊安健安全技术咨询有限公司,山东潍坊261061

出　　处：《环境污染与防治》2019年第9期1006-1010,1017,共6页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.51508525);宁夏回族自治区重点研发计划项目(No.2016KJHM31)

摘　　要：燃煤电厂烟气是中国最重要的人为汞排放源之一,如何控制燃煤烟气汞排放关系着中国履行《关于汞的水俣公约》的成效。通过共沉淀法制备了锡-锰二元金属氧化物(MnOx-SnO2)复合材料,对其结构进行了表征,并考察了其对烟气零价汞(Hg^0)的吸附性能。结果表明,在200℃时Hg^0的去除率最高,能达到86.0%;烟气中的O2能促进Hg^0的去除,而SO2则抑制Hg^0的去除。MnOx-SnO2去除Hg^0的机理是烟气Hg^0首先被吸附在复合材料表面,被MnOx催化氧化成Hg^2+,一部分被表面的吸附氧捕捉从而形成HgO,一部分与锡结合形成锡汞齐。The coal-fired flue gas of power plants is one of the most important source of man-made mercury emission in China,and how to control the mercury emission from coal-fired flue gas is related to the effectiveness of China’s implementation of “Minamata convention on mercury”. In this paper,Sn-Mn binary metal oxides ( MnO x -SnO 2 ) were prepared by co-precipitation method. The adsorbent structure was characterized and the Hg^0 removal performance was performed. Results showed that Hg^0 removal rate was excellent at 200 ℃,and it could reach 86.0%. O 2 in flue gas could promote the removal of Hg^0 ,while SO 2 could inhibit the absorption of Hg^0 . The mechanism of Hg^0 removal by MnO x -SnO 2 might be that Hg^0 in flue gas was first adsorbed on the materials’ surface,and catalytically oxidated into Hg 2+ via MnO x . Part of Hg^2+ were captured by the surface adsorption oxygen,thus forming HgO,and part of that formed tin amalgam with Sn.

关 键 词：零价汞 金属氧化物 烟气 吸附 

分 类 号：X70[环境科学与工程—环境工程]