A critical review on the technique and mechanism of microwave-based denitrification in flue gas |
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Authors: | Yi Zhao Bo Yuan Zhen Qian Zili Zhang Le Fu Shihang Pan Runlong Hao |
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Institution: | 1. Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China;2. MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China;3. Fujian Special Equipment Inspection and Research Institute, Fuzhou, Fujian 350008, China |
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Abstract: | Microwave radiation has received extensive attention due to its significant thermal and non-thermal effects, and the development of MW-based denitrification in flue gas has become one of the most promising methods to avoid the defects of ammonia escape, high temperature and cost in traditional SCR. This review introduces the thermal and non-thermal effects of microwaves and divides MW-based denitrification methods into MW reduction and oxidation denitrification, systematically summarizes these denitrification methods, including MW discharge reduction, MW-induced catalytic reduction using active carbon, molecular sieves, metal oxides (transition metals, perovskites, etc.), MW-induced oxidation denitrification with and without additional oxidant, and discusses their removal pathway and mechanism. Finally, several research prospects and directions regarding the development of microwave-based denitrification methods are provided. |
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Keywords: | Corresponding author Microwave Denitrification Reduction Oxidation Radical |
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