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Simultaneous removal of SO2 and NO using a novel method with red mud as absorbent combined with O-3 oxidatio
Li, Bin1; Wu, Heng1,2; Liu, Xiaolong2; Zhu, Tingyu2,3; Liu, Fagao2; Zhao, Xingting1
2020-06-15
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume392Pages:9
AbstractAiming at SO2 and NOx in industrial flue gas, the simultaneous removal of SO2 and NOx was conducted using red mud as absorbent with O-3 oxidation. The effects of different factors on the desulfurization and denitration efficiency were investigated. The results show that the increase of oxidation temperature is not conducive to the absorption of NOx (O-3/NO molar ratio > 1). Low concentration of SO2 promotes the absorption of NOx, however high concentration of SO2 inhibits absorption of NOx. The main product after desulfurization and denitration of red mud solid residue is bassanite (CaSO4 center dot 0.5H(2)O). In addition, when the pH is greater than 5, calcium carbonate and sodium alkali play major roles in red mud, and when 3.5 < pH < 5, sodium aluminosilicate hydrate (1.08Na(2)O center dot Al2O3 center dot 1.68SiO(2)center dot 1.8H(2)O), calcium nepheline (Na6CaAl6Si6(CO3)O-24 center dot 2H(2)O) and garnet (Ca3Al2(SiO4)(OH)(8)) take part in the reaction. According to typically practical conditions with oxidation temperature at 130 degrees C and the O-3/NO molar ratio being 1.8, the desulfurization efficiency of red mud can reach 93 % in the first hour, and the denitration efficiency can be maintained at about 87 %. Besides, the reaction mechanism with multi oxidation absorption steps was also proposed.
KeywordSimultaneous removal O(3)oxidation Red mud Desulfurization and denitration Reaction mechanism
DOI10.1016/j.jhazmat.2020.122270
Language英语
WOS KeywordSULFUR-DIOXIDE ; OZONE INJECTION ; FLY-ASH ; ABSORPTION ; REDUCTION ; KINETICS ; OXYGEN
Funding ProjectNational Key Research and Development Program of China[2017YFC0210600] ; National Key Research and Development Program of China[2017YFC0210500] ; National Natural Science Foundation of China[51978644]
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China
WOS IDWOS:000527016900022
PublisherELSEVIER
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/40283
Collection中国科学院过程工程研究所
Corresponding AuthorLiu, Xiaolong; Zhu, Tingyu
Affiliation1.Kunming Univ Sci & Technol, Fac Environm Sci & Engn, Kunming 650500, Yunnan, Peoples R China
2.Chinese Acad Sci, Beijing Engn Res Ctr Proc Pollut Control, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
Recommended Citation
GB/T 7714
Li, Bin,Wu, Heng,Liu, Xiaolong,et al. Simultaneous removal of SO2 and NO using a novel method with red mud as absorbent combined with O-3 oxidatio[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,392:9.
APA Li, Bin,Wu, Heng,Liu, Xiaolong,Zhu, Tingyu,Liu, Fagao,&Zhao, Xingting.(2020).Simultaneous removal of SO2 and NO using a novel method with red mud as absorbent combined with O-3 oxidatio.JOURNAL OF HAZARDOUS MATERIALS,392,9.
MLA Li, Bin,et al."Simultaneous removal of SO2 and NO using a novel method with red mud as absorbent combined with O-3 oxidatio".JOURNAL OF HAZARDOUS MATERIALS 392(2020):9.
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