The industrial feasibility of low temperature DeNO(x) in the presence of SOx: a project case in a medium coking plant

doi:10.1039/c8ra02767f

	The industrial feasibility of low temperature DeNO(x) in the presence of SOx: a project case in a medium coking plant
	Li, Changming 1; Yu, Jian 1; He, Yi 2; Yu, Chao 3; Li, Ping 3; Wang, Chao 3; Huang, Fulin 1; Gao, Shiqiu 1
刊名	RSC ADVANCES
	2018
卷号	8 期号:33 页码:18260-18265
ISSN号	2046-2069
DOI	10.1039/c8ra02767f
英文摘要	Catalyst poisoning by SOx has hindered the industrial application of selective catalytic reduction (SCR) technology for the DeNO(x) of low temperature flue gas for many decades. The current engineering process of placing the SCR unit after the desulphurization and dedusting units can lead to high project and operational costs owing to low DeNO(x) efficiency at low temperatures. Based on our previous pilot results, a DeNO(x) project case was built before the desulfurization unit in a medium coking plant to explore the industrial feasibility of low temperature DeNO(x) in the presence of SOx. A new engineering process was considered and designed to overcome the problem of SOx, including the elimination of SO3 with NH3 before the SCR reactor, the filtration of ash by a foam metal plate and in situ regeneration technology. The project case could run continuously for six months with above 70% DeNO(x) efficiency and less than 10 ppm NH3 slip at 250 degrees C and a space velocity of 4000 h(-1) in the presence of 260-300 mg m(-3) SOx. The activity loss for the catalyst itself was not obvious after it had been running for six months, but blocking of the honeycomb channels by the sedimentary ash on the honeycomb catalyst modules owing to the low linear velocity resulted in decreased DeNO(x) efficiency and an increased pressure drop. A improved DeNO(x) process with gravitational dust collectors was also proposed to upgrade the present DeNO(x) project case for further continuous and stable operation.
资助项目	State Key Laboratory of Multi-phase Complex Systems[MPCS-2017-A-06] ; Natural Science Foundation of China[21601192] ; International Science and Technology Cooperation Program of China[2016YFE0128300]
WOS关键词	SELECTIVE CATALYTIC-REDUCTION ; OXIDE CATALYSTS ; SCR CATALYST ; FLUE-GAS ; NOX ; AMMONIA ; DECOMPOSITION ; DEACTIVATION ; REGENERATION ; MECHANISM
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000433428300008
资助机构	State Key Laboratory of Multi-phase Complex Systems ; Natural Science Foundation of China ; International Science and Technology Cooperation Program of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/24920]
专题	中国科学院过程工程研究所
通讯作者	Yu, Jian
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Minist Environm Protect Peoples Republ China, Solid Waste & Chem Management Ctr, Beijing 100029, Peoples R China 3.Xiangtan Univ, Sch Chem Engn, Xiangtan 411105, Hunan, Peoples R China
推荐引用方式 GB/T 7714	Li, Changming,Yu, Jian,He, Yi,et al. The industrial feasibility of low temperature DeNO(x) in the presence of SOx: a project case in a medium coking plant[J]. RSC ADVANCES,2018,8(33):18260-18265.
APA	Li, Changming.,Yu, Jian.,He, Yi.,Yu, Chao.,Li, Ping.,...&Gao, Shiqiu.(2018).The industrial feasibility of low temperature DeNO(x) in the presence of SOx: a project case in a medium coking plant.RSC ADVANCES,8(33),18260-18265.
MLA	Li, Changming,et al."The industrial feasibility of low temperature DeNO(x) in the presence of SOx: a project case in a medium coking plant".RSC ADVANCES 8.33(2018):18260-18265.