A study on removal of elemental mercury in flue gas using fenton solution
A study on removal of elemental mercury in flue gas using fenton solution
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DOI：
10.1016/j.jhazmat.2015.03.027
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发表时间：
2015-07-15
影响因子：
13.6
通讯作者：
Zhang, Jun
中科院分区：
文献类型：
--
作者：
Liu, Yangxian;Wang, Yan;Zhang, Jun
提出了一种鼓泡反应器中芬顿溶液氧化分离烟气中单质汞的新技术。研究了H2 O2浓度、Hg入口浓度、Fe 2+浓度、溶液温度、溶液pH值、气体流量等工艺参数和烟气成分（NO、SO2、O-2、CO2、无机离子和颗粒物）对Hg-0脱除效果的影响。结果表明，H2 O2浓度、Fe 2+浓度、溶液pH值和气体流量对除汞效果有较大影响。溶液温度、Hg-0、NO、SO2、CO 32-和HCO 3-浓度对Hg-0的去除也有显著影响。而Cl-、SO 42-、NO3-、O-2和CO2浓度对汞的去除影响较小。此外，还对脱汞反应机理及Hg-0、NO和SO2的同时脱除工艺进行了研究。Hg的去除是通过（OH）-O-中心点的氧化和H2 O2的氧化来实现的。在最佳实验条件下，SO2、Hg-0和NO的同时去除率分别达到100%、100%和88.3%。实验结果表明，在鼓泡反应器中使用芬顿溶液进行除汞并同时去除Hg、SO2和NO的可行性。(C)2015 Elsevier B. V.版权所有。
A novel technique on oxidation-separation of elemental mercury (Hg-0) in flue gas using Fenton solution in a bubbling reactor was proposed. The effects of several process parameters (H2O2 concentration, Hg inlet concentration, Fe2+ concentration, solution temperature, solution pH, gas flow) and several flue gas components (NO, SO2, O-2, CO2, inorganic ions and particulate matters on Hg-0 removal were studied. The results indicate that H2O2 concentration, Fe2+ concentration, solution pH and gas flow have great effects on Hg removal. Solution temperature, Hg-0, NO, SO2, CO32- and HCO3- concentrations also have significant effects on Hg-0 removal. However, Cl-, SO42-, NO3-, O-2 and CO2 concentrations only have slight effects on Hg removal. Furthermore, reaction mechanism of Hg removal and simultaneous removal process of Hg-0, NO and SO2 were also studied. Hg is removed by oxidation of (OH)-O-center dot and oxidation of H2O2. The simultaneous removal efficiencies of 100% for SO2, 100% for Hg-0 and 88.3% for NO were obtained under optimal test conditions. The results demonstrated the feasibility of Hg removal and simultaneous removal of Hg, SO2 and NO using Fenton solution in a bubbling reactor. (C) 2015 Elsevier B.V. All rights reserved.