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Low-medium temperature application of selective catalytic reduction denitration in cement flue gas through a pilot plant
Guo, Yangyang1; Luo, Lei1; Zheng, Yang1; Wang, Jian1; Zhu, Tingyu1,2
2021-08-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume276Pages:7
AbstractLow-medium temperature application of selective catalytic reduction (SCR) denitration in cement flue gas was established and investigated in this study. The 2000 h continuous operation shows the concentration of NOx at the outlet can be maintained at 24 mg/Nm(3) on average, while due to the increase of SO2 in flue gas, the NOx concentration increased to 57.5 mg/Nm(3) after long time operation. The sulfur deposition is the main reason for catalyst deactivation, and SO2 is still a big obstacle for low-medium temperature SCR application in cement flue gas. The denitration efficiency was tested as fluctuated from 73.5% to 86.2%, and ammonia concentration after SCR was as still as high as 22.5-60.0 mg/Nm(3) due to the excessive ammonia injection from selective non-catalytic reduction (SNCR), shows serious ammonia escape problem for SNCR, and the potential application of hybrid SNCR-SCR technology. In order to maintain the denitration efficiency above 85.0%, the gaseous hourly space velocity (GHSV) should not be exceeded 2800 h(-1), the electrostatic precipitators (ESP) setting at 60 kV was relatively appropriate, the temperature of the flue gas should be kept at above 200 degrees C. The concentrations and toxic equivalent quantities (TEQs) of the PCDD/Fs congeners in the flue gas raised greatly after SCR reactor, indicating the PCDD/Fs concentration should be concerned during the application of low-medium temperature SCR, especially for the waste co-disposal processes. (c) 2021 Elsevier Ltd. All rights reserved.
KeywordLow-medium temperature SCR application Operation conditions Sulfur poisoning PCDD/Fs analysis
DOI10.1016/j.chemosphere.2021.130182
Language英语
WOS KeywordNOX CONTROL ; SNCR ; SCR
Funding ProjectNational Key Research and Development Program of China[2017YFC021080401] ; National Science Foundation of China[51778600] ; Key Research and Development Program of Hebei Province, China[19273715D] ; National Engineering Laboratory for Flue Gas Pollutants Control Technology and Equipment, China[NEL-KF-2019017]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationNational Key Research and Development Program of China ; National Science Foundation of China ; Key Research and Development Program of Hebei Province, China ; National Engineering Laboratory for Flue Gas Pollutants Control Technology and Equipment, China
WOS IDWOS:000648339700087
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48837
Collection中国科学院过程工程研究所
Corresponding AuthorZhu, Tingyu
Affiliation1.Chinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn,Innovat Acad Green Manufacture, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
Recommended Citation
GB/T 7714
Guo, Yangyang,Luo, Lei,Zheng, Yang,et al. Low-medium temperature application of selective catalytic reduction denitration in cement flue gas through a pilot plant[J]. CHEMOSPHERE,2021,276:7.
APA Guo, Yangyang,Luo, Lei,Zheng, Yang,Wang, Jian,&Zhu, Tingyu.(2021).Low-medium temperature application of selective catalytic reduction denitration in cement flue gas through a pilot plant.CHEMOSPHERE,276,7.
MLA Guo, Yangyang,et al."Low-medium temperature application of selective catalytic reduction denitration in cement flue gas through a pilot plant".CHEMOSPHERE 276(2021):7.
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