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    于明磊, 马良, 张艳红, 汪华林, 于新海, 杨雪晶. 中空纤维膜反应器结合芬顿试剂脱除燃煤烟气中的Hg0[J]. 华东理工大学学报(自然科学版), 2017, (5): 647-654,676. DOI: 10.14135/j.cnki.1006-3080.2017.05.008
    引用本文: 于明磊, 马良, 张艳红, 汪华林, 于新海, 杨雪晶. 中空纤维膜反应器结合芬顿试剂脱除燃煤烟气中的Hg0[J]. 华东理工大学学报(自然科学版), 2017, (5): 647-654,676. DOI: 10.14135/j.cnki.1006-3080.2017.05.008
    YU Ming-lei, MA Liang, ZHANG Yan-hong, WANG Hua-lin, YU Xin-hai, YANG Xue-jing. Removal of Hg0 from Simulated Flue Gas by Fenton Process in A Hollow Fiber Reactor[J]. Journal of East China University of Science and Technology, 2017, (5): 647-654,676. DOI: 10.14135/j.cnki.1006-3080.2017.05.008
    Citation: YU Ming-lei, MA Liang, ZHANG Yan-hong, WANG Hua-lin, YU Xin-hai, YANG Xue-jing. Removal of Hg0 from Simulated Flue Gas by Fenton Process in A Hollow Fiber Reactor[J]. Journal of East China University of Science and Technology, 2017, (5): 647-654,676. DOI: 10.14135/j.cnki.1006-3080.2017.05.008

    中空纤维膜反应器结合芬顿试剂脱除燃煤烟气中的Hg0

    Removal of Hg0 from Simulated Flue Gas by Fenton Process in A Hollow Fiber Reactor

    • 摘要: 将中空纤维膜反应器和芬顿试剂结合脱除烟气中的Hg0。研究了不同参数以及SO2、NO和O2等杂质气体对Hg0脱除的影响。结果表明:随着H2O2浓度、Fe2+浓度、溶液初始pH和温度的增加,Hg0脱除率先增加后降低,其最佳工作条件是H2O2浓度为6 mmol/L,Fe2+浓度为9 mmol/L,溶液初始pH为2.5,温度为20℃;增大液气比和通过减小气相流量增大停留时间均对Hg0脱除有增强作用,当液气比超过0.11时,Hg0的脱除率不再增加;当气相流量为0.6 L/min时,Hg0脱除率超过85%;SO2、NO对Hg0的脱除有抑制作用,O2对Hg0的脱除几乎没有影响;还测定出温度20℃下中空纤维膜反应器的比相界面积a=270.29 m-1和传质动力学参数kL=8.13×10-4 m/s,kG=0.786×10-6 mol/(m2·s·Pa)。

       

      Abstract: A novel hollow fiber reactor was used to remove Hg0 from simulated flue gas by Fenton process.The effects of several parameters and impurity gases such as SO2、NO and O2 on removal efficiency of Hg0 by Fenton process were investigated.The results indicated that the Hg0 removal efficiency increased first and then decreased upon increasing H2O2 concentration,Fe2+ concentration,initial pH value of solution,and temperature.The optimum conditions were:H2O2 concentration of 6 mmol/L, Fe2+ concentration of 9 mmol/L,initial pH value of solution of 2.5, and temperature of 20℃.The increase in liquid-gas ratio and the residence time (the decrease of gas flow rate) enhanced the removal of Hg0,while the removal efficiency didn't increase any more when the liquid-gas ratio was over 0.11.Hg0 removal efficiency exceeded 85% when gas flow rate was 0.6 L/min.SO2 and NO can inhibit the removal of Hg0, while O2 has no obvious impact on Hg0 removal efficiency.In the hollow fiber reactor,the specific surface area (a) and mass transfer-reaction coefficient (kL,kG) between Fenton reagent and Hg0 were 270.29 m-1,8.13×10-4 m/s,0.786×10-6 mol/(m2·s·Pa) (20℃),respectively.

       

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