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Environ Sci Technol

Title:		Multipollutant Control (MPC) of Flue Gas from Stationary Sources Using SCR Technology: A Critical Review
Author(s):		Wang D; Chen Q; Zhang X; Gao C; Wang B; Huang X; Peng Y; Li J; Lu C; Crittenden J;
Address:		"State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, Beijing 100084, China. Brook Byers Institute for Sustainable Systems and School of Civil and Environmental Engineering, Georgia Institute of Technology, 828 West Peachtree Street, Atlanta, Georgia 30332, United States. National Engineering Laboratory for Coal-Burning Pollutants Emission Reduction, School of Energy and Power Engineering, Shandong University, Jinan 250061, China"
Journal Title:		Environ Sci Technol
Year:		2021
Volume:		20210211
Issue:		5
Page Number:		2743 - 2766
DOI:		10.1021/acs.est.0c07326
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Linking)
Abstract:		"The emission of gaseous pollutants from the combustion of fossil fuels is believed to be one of the most serious environmental challenges in the 21st century. Given the increasing demands of multipollutant control (MPC) via adsorption or catalysis technologies, such as NO(x), volatile organic compounds (VOCs), heavy metals (Hg etc.), and ammonia, and considering investment costs and site space, the use of existing equipment, especially the selective catalytic reduction (SCR) system to convert pollutants into harmless or readily adsorbed substances, is one of the most practical approaches. Consequently, many efforts have been directed at achieving the simultaneous elimination of multipollutants in a SCR convertor, and this method has been widely used to mitigate the stationary emission of NO(x). However, the development of active, selective, stable, and multifunctional catalysts/adsorbents suitable for large-scale commercialization remains challenging. Herein, we summarize recent works on the applications of SCR in MPC, describing the approaches of (i) SCR + VOCs oxidation, (ii) SCR + heavy metal control, and (iii) SCR + NH(3) reduction to reveal that the efficiency of simultaneous elimination depends on catalyst composition and flue gas parameters. Furthermore, the synergistic promotional/inhibitory effects between SCR and VOCs/ammonia/heavy metal oxidations are shown to be the key to the feasibility of the reactions"
Keywords:		*Air Pollutants/analysis Ammonia Catalysis Coal Gases *Mercury Oxidation-Reduction;
Notes:		"MedlineWang, Dong Chen, Qiuzhun Zhang, Xiang Gao, Chuan Wang, Bin Huang, Xu Peng, Yue Li, Junhua Lu, Chunmei Crittenden, John eng Research Support, Non-U.S. Gov't Review 2021/02/12 Environ Sci Technol. 2021 Mar 2; 55(5):2743-2766. doi: 10.1021/acs.est.0c07326. Epub 2021 Feb 11"