کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6578889 1422930 2018 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Elemental mercury removal from flue gas using heat and Co2+/Fe2+ coactivated oxone oxidation system
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Elemental mercury removal from flue gas using heat and Co2+/Fe2+ coactivated oxone oxidation system
چکیده انگلیسی
Oxidation removal process of elemental mercury (Hg0) from flue gas using heat and Co2+/Fe2+ coactivated Oxone oxidation system in a spraying reactor was developed. The effects of several influencing factors and main flue gas compositions on Hg0 removal, and the active species, products, mechanism and mass transfer-reaction kinetic law of Hg0 removal process were investigated. The results show that heat and Co2+/Fe2+ have a significant synergistic effect for activating Oxone to produce free radicals and promote Hg0 removal. Hg0 removal can be improved via increasing Oxone concentration, Co2+/Fe2+ concentration, activation temperature or O2 concentration, and is inhibited with increasing solution pH, Hg0 inlet concentration or NO concentration. Changing SO2 concentration have double impacts on Hg0 removal. SO4− and OH produced from coactivation of heat and Co2+/Fe2+ are the key oxidants, which play a leading role in Hg0 removal. Oxone plays a complementary role in Hg0 removal. Hg0 removal processes using heat/Co2+ and heat/Fe2+ coactivated Oxone systems belong to fast reactions under optimized experimental conditions, and meets a total 2.8-order reaction (i.e. 1.0-order for Hg0, 1.1-order for Oxone and 0.7-order for Co2+) in Co2+/Oxone activation system, and a total 3.0-order reaction (i.e. 1.0-order for Hg0, 1.4-order for Oxone and 0.6-order for Fe2+) in Fe2+/Oxone activation system. Finally, the key mass transfer and kinetic parameters of Hg0 removal processes were also determined.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 348, 15 September 2018, Pages 464-475
نویسندگان
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