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
发表期刊RSC ADVANCES
ISSN2046-2069
卷号6期号:64页码:59009-59015
摘要Adding 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.
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1039/c6ra11468g
收录类别SCI
语种英语
关键词[WOS]FIRED POWER-PLANTS ; CALCIUM-CHLORIDE ADDITION ; FLUE-GAS ; ELEMENTAL MERCURY ; EMISSION CONTROL ; BITUMINOUS COAL ; CONTROL DEVICES ; FLY ASHES ; CHINA ; BROMINE
WOS研究方向Chemistry
WOS类目Chemistry, Multidisciplinary
项目资助者National Ministry of Environmental Protection(201309018) ; National Basic Research Program (973) of China(2013CB430005)
WOS记录号WOS:000379350100019
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21249
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.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
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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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