School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
Jiangsu Province Special Equipment Safety Supervision Inspection Institute (Branch of Wuxi), Wuxi 214000, China.
J Hazard Mater. 2015 Jul 15;292:164-72. doi: 10.1016/j.jhazmat.2015.03.027. Epub 2015 Mar 17.
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(0) inlet concentration, Fe(2+) concentration, solution temperature, solution pH, gas flow) and several flue gas components (NO, SO2, O2, CO2, inorganic ions and particulate matters on Hg(0) removal were studied. The results indicate that H2O2 concentration, Fe(2+) concentration, solution pH and gas flow have great effects on Hg(0) removal. Solution temperature, Hg(0), NO, SO2, CO3(2-) and HCO3(-) concentrations also have significant effects on Hg(0) removal. However, Cl(-), SO4(2-), NO3(-), O2 and CO2 concentrations only have slight effects on Hg(0) removal. Furthermore, reaction mechanism of Hg(0) removal and simultaneous removal process of Hg(0), NO and SO2 were also studied. Hg(0) is removed by oxidation of OH 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(0) removal and simultaneous removal of Hg(0), SO2 and NO using Fenton solution in a bubbling reactor.
提出了一种在鼓泡反应器中使用芬顿溶液氧化分离烟气中元素汞（Hg(0)）的新技术。研究了几种工艺参数（H2O2 浓度、Hg(0)入口浓度、Fe(2+)浓度、溶液温度、溶液 pH 值、气体流量）和几种烟气成分（NO、SO2、O2、CO2、无机离子和颗粒物）对 Hg(0)去除的影响。结果表明，H2O2 浓度、Fe(2+)浓度、溶液 pH 值和气体流量对 Hg(0)去除有很大影响。溶液温度、Hg(0)、NO、SO2、CO3(2-)和 HCO3(-)浓度对 Hg(0)去除也有显著影响。然而，Cl(-)、SO4(2-)、NO3(-)、O2 和 CO2 浓度对 Hg(0)去除只有轻微影响。此外，还研究了 Hg(0)去除的反应机制和 Hg(0)、NO 和 SO2 的同时去除过程。Hg(0)通过 OH 的氧化和 H2O2 的氧化去除。在最佳试验条件下，SO2 的去除率为 100%，Hg(0)的去除率为 100%，NO 的去除率为 88.3%。结果表明，在鼓泡反应器中使用芬顿溶液去除 Hg(0)和同时去除 Hg(0)、SO2 和 NO 是可行的。
