中国电机工程学报2024，Vol.44Issue(4)：1481-1492,中插19,13.DOI:10.13334/j.0258-8013.pcsee.222289
卤化钾改性Mn-Co-Fe尖晶石脱除气相Hg0的性能研究
Study on the Performance of Potassium Halide Modified Mn-Co-Fe Spinel for Removing Hg0 in Gas Phase
摘要
Abstract
In this study,in order to improve the mercury removal performance of Mn-Co-Fe spinel adsorbent,KX(X represents Cl,Br and I)modified Mn-Co-Fe spinel adsorbent is prepared by using sol-gel self-combustion method and impregnation method at first.Then,the surface morphology,the proportion and distribution of surface elements,the specific surface area and total pore volume,the crystal phase structure and the specific saturation magnetization characteristics are characterized by SEM,SEM combined with EDS energy spectrum mapping,BET,XRD and VSM,respectively.The effects of potassium halide type,potassium halide loading,adsorption reaction temperature and initial mercury concentration on mercury removal performance in simulated coal-fired flue gas are investigated through a fixed bed.Finally,the control mechanism of mercury removal by adsorbent and the present valence state of mercury on the adsorbent surface are studied based on dynamic simulation,XPS characterization and temperature programmed desorption experiment.The results show that under the same experimental conditions,the average mercury removal efficiency of 0.10KX@MCFS is KI(92.84%)>KBr(88.39%)>KCl(86.61%).Additionally,with the increase of the KI loading,adsorption temperature and inlet mercury concentration,the mercury removal performance of modified MCFS can be improved to a certain extent.Although the loading of KI leads to the decrease of the magnetic properties of MCFS,the comprehensive analysis shows that 0.10KI@MCFS has a relatively excellent mercury removal performance and saturation magnetization(34.0 emu/g).Therefore,the findings of this study have an important reference value for the practice of mercury pollution emission control and magnetic recovery of adsorbents.关键词
汞/Mn-Co-Fe尖晶石/卤化钾/浸渍改性/饱和磁化强度Key words
mercury/Mn-Co-Fe spinel/potassium halide/impregnation modification/saturation magnetization分类
资源环境引用本文复制引用
徐元强,仲兆平,许月阳,黄佳伟..卤化钾改性Mn-Co-Fe尖晶石脱除气相Hg0的性能研究[J].中国电机工程学报,2024,44(4):1481-1492,中插19,13.基金项目
国家能源集团科技创新项目(GJNY-20-109) （GJNY-20-109）
国家重点研发计划项目(2017YFC0210203). Science and Technology Innovation Project of China Energy Group(GJNY-20-109) （2017YFC0210203）
National Key R&D Program of China(2017YFC0210203). （2017YFC0210203）
