TY - JOUR
T1 - Recent advances in simultaneous removal of SO2 and NOx from exhaust gases
T2 - Removal process, mechanism and kinetics
AU - Chen, Rong
AU - Zhang, Tongsheng
AU - Guo, Yiqun
AU - Wang, Jiawei
AU - Wei, Jiangxiong
AU - Yu, Qijun
PY - 2021/9/15
Y1 - 2021/9/15
N2 - SO2 and NOx, major gaseous pollutants in exhaust gas, can exert adverse effects on human health and environmental disaster. Therefore, numerous desulfurization (de-SO2) and denitrification (de-NOx) technologies have been designed to reduce SO2 and NOx emissions. Compared to traditional multi-step removal processes, simultaneous removal of SO2 and NOx has been attracting significant attention recently. This paper timely reviewed available literature focused on simultaneous de-SO2 and de-NOx methods, which are classified into four pathways as oxidation, reduction, adsorption/absorption and microbial purification. The removal process, basic mechanism and kinetics of each pathway are systematically reviewed in consideration of reactants, catalyzers, temperatures and atmosphere. Moreover, the main challenges and potential breakthroughs in developing novel simultaneous de-SO2 and de-NOx methods are critically discussed to provide a roadmap for prospective research activities. Therefore, this review provides a deeper insight in understanding the mechanisms of de-SO2 and de-NOx, and then helps to develop innovative simultaneous removal methods or improve the efficiency of available abatement methods.
AB - SO2 and NOx, major gaseous pollutants in exhaust gas, can exert adverse effects on human health and environmental disaster. Therefore, numerous desulfurization (de-SO2) and denitrification (de-NOx) technologies have been designed to reduce SO2 and NOx emissions. Compared to traditional multi-step removal processes, simultaneous removal of SO2 and NOx has been attracting significant attention recently. This paper timely reviewed available literature focused on simultaneous de-SO2 and de-NOx methods, which are classified into four pathways as oxidation, reduction, adsorption/absorption and microbial purification. The removal process, basic mechanism and kinetics of each pathway are systematically reviewed in consideration of reactants, catalyzers, temperatures and atmosphere. Moreover, the main challenges and potential breakthroughs in developing novel simultaneous de-SO2 and de-NOx methods are critically discussed to provide a roadmap for prospective research activities. Therefore, this review provides a deeper insight in understanding the mechanisms of de-SO2 and de-NOx, and then helps to develop innovative simultaneous removal methods or improve the efficiency of available abatement methods.
KW - Absorption or adsorption
KW - Catalytic oxidation
KW - Catalytic reduction
KW - Microbial desulfurization and denitrification
KW - Simultaneous SO and NO removal
UR - http://www.scopus.com/inward/record.url?scp=85103033940&partnerID=8YFLogxK
UR - https://www.sciencedirect.com/science/article/pii/S1385894720337104?via%3Dihub
U2 - 10.1016/j.cej.2020.127588
DO - 10.1016/j.cej.2020.127588
M3 - Review article
AN - SCOPUS:85103033940
SN - 1385-8947
VL - 420
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
IS - Part 2
M1 - 127588
ER -