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Effect of HBr formation on mercury oxidation via CaBr2 addition to coal during combustion
Yang, Yang1,2; Xu, Wenqing1; Wu, Yinghong1,2; Xiong, Jin1,2; Zhu, Tingyu1; Zhou, Xuan1; Tong, Li1,2
2016
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume6Issue:64Pages:59009-59015
AbstractAdding CaBr2 to coal to enhance elemental mercury (Hg0) oxidation during combustion has been an effective mercury control technology, but the added CaBr2 may increase levels of noxious Br-2 or HBr gases in flue gas. Temperature-programmed decomposition (TPD) experiments were conducted to verify the effect of CaBr2 addition on Hg-0 oxidation. The results indicated that the amount of Hg-0 released initially decreased with increasing amounts of CaBr2 additive and then held steady. The optimal amount of additive was 200 mu g g(-1). CaBr2 addition effectively oxidized Hg-0 released at relatively low temperatures only. The generation of HBr was confirmed by mass spectrometry. The formation of HBr occurred over a temperature range of 250 degrees C to 400 degrees C, and the HBr concentration first increased and then remained stable as levels of CaBr2 additive were increased in coal. The maximum concentration of HBr was 18 ppm and corresponded to 200 mu g g(-1) CaBr2. Further analysis indicated a strong, negative linear correlation between the amount of Hg-0 released and the HBr concentration in flue gas. Based on these findings and previous studies, the possible mechanism of oxidation of Hg-0 by CaBr2 was analyzed.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c6ra11468g
Indexed BySCI
Language英语
WOS KeywordFIRED POWER-PLANTS ; CALCIUM-CHLORIDE ADDITION ; FLUE-GAS ; ELEMENTAL MERCURY ; EMISSION CONTROL ; BITUMINOUS COAL ; CONTROL DEVICES ; FLY ASHES ; CHINA ; BROMINE
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding OrganizationNational Ministry of Environmental Protection(201309018) ; National Basic Research Program (973) of China(2013CB430005)
WOS IDWOS:000379350100019
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21249
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Res Ctr Proc Pollut Control, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yang, Yang,Xu, Wenqing,Wu, Yinghong,et al. Effect of HBr formation on mercury oxidation via CaBr2 addition to coal during combustion[J]. RSC ADVANCES,2016,6(64):59009-59015.
APA Yang, Yang.,Xu, Wenqing.,Wu, Yinghong.,Xiong, Jin.,Zhu, Tingyu.,...&Tong, Li.(2016).Effect of HBr formation on mercury oxidation via CaBr2 addition to coal during combustion.RSC ADVANCES,6(64),59009-59015.
MLA Yang, Yang,et al."Effect of HBr formation on mercury oxidation via CaBr2 addition to coal during combustion".RSC ADVANCES 6.64(2016):59009-59015.
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