Simultaneous removal of SO2 and NO using a novel method with red mud as absorbent combined with O-3 oxidatio

doi:10.1016/j.jhazmat.2020.122270

	Simultaneous removal of SO2 and NO using a novel method with red mud as absorbent combined with O-3 oxidatio
	Li, Bin 1; Wu, Heng 1,2; Liu, Xiaolong 2; Zhu, Tingyu 2,3; Liu, Fagao 2; Zhao, Xingting 1
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2020-06-15
卷号	392 页码:9
关键词	Simultaneous removal O(3)oxidation Red mud Desulfurization and denitration Reaction mechanism
ISSN号	0304-3894
DOI	10.1016/j.jhazmat.2020.122270
英文摘要	Aiming 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.
资助项目	National 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关键词	SULFUR-DIOXIDE ; OZONE INJECTION ; FLY-ASH ; ABSORPTION ; REDUCTION ; KINETICS ; OXYGEN
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000527016900022
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/40282]
专题	中国科学院过程工程研究所
通讯作者	Liu, Xiaolong; Zhu, Tingyu
作者单位	1.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
推荐引用方式 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.