کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7006175 1455139 2018 31 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simultaneous absorption-oxidation of nitric oxide and sulfur dioxide using ammonium persulfate synergistically activated by UV-light and heat
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Simultaneous absorption-oxidation of nitric oxide and sulfur dioxide using ammonium persulfate synergistically activated by UV-light and heat
چکیده انگلیسی
Simultaneous absorption-oxidation process of nitric oxide (NO) and sulfur dioxide (SO2) from flue gas using aqueous ammonium persulfate synergistically activated by UV-light and heat in a novel UV-impinging stream reactor was developed. The main influencing factors, products and active species of NO and SO2 simultaneous removal were studied. The mass transfer and kinetics of NO absorption-oxidation were also investigated. The present studies show that SO2 is very easy to remove because of its very high solubility in water (SO2 removal efficiencies reach 100% under most of experimental conditions). Increasing S2O82− concentration, UV radiation power, activation temperature or liquid-gas ratio promotes absorption-oxidation of NO. Increasing solution pH, concentrations of NO and SO2 or flue gas flow inhibits absorption-oxidation of NO. The contents of O2 and CO2 have no significant effect on removal of NO. The highest simultaneous removal efficiency for NO and SO2 is 96.1% and 100%, respectively. OH and SO4− are the key oxidizers for NO removal. Absorption-oxidation process of NO meets a fast pseudo-first order reaction for NO, and can be enhanced by increasing the gas-side mass transfer coefficient and interfacial area.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Research and Design - Volume 130, February 2018, Pages 321-333
نویسندگان
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