文献详情
Characteristics of Speciated Mercury Emissions from Coal Combustion in Air and Oxygen-Enriched Environment
文献类型：期刊
通讯作者：Tong, YD (reprint author), Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China.
期刊名称：BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY影响因子和分区
年：2019
卷：102
期：5,SI
页码：695-700
ISSN：0007-4861
关键词：Coal; Oxy-fuel combustion; Speciated mercury; Combustion temperature
所属部门：环境学院
摘要：Coal combustion is a dominant source of Hg in atmosphere and is believed to be responsible for increases of atmospheric Hg since industrial revolution. In this study, we compared characteristics of different Hg species emitted from combustion of different types of coal in air and oxygen-enriched environment. Total Hg emissions from coal combustion increased significantly with increase of combustion temperature and the majority of emitted Hg existed in the form of Hg-0. Total Hg emissions were 8. ...More
Coal combustion is a dominant source of Hg in atmosphere and is believed to be responsible for increases of atmospheric Hg since industrial revolution. In this study, we compared characteristics of different Hg species emitted from combustion of different types of coal in air and oxygen-enriched environment. Total Hg emissions from coal combustion increased significantly with increase of combustion temperature and the majority of emitted Hg existed in the form of Hg-0. Total Hg emissions were 8.61 (5.38-16.48) ng/g (average and range) at 500 degrees C, while increased to 18.65 (6.49-40.38) ng/g at 900 degrees C. After burning at high temperatures, the higher percentage of reactive Hg species was observed in the flue gases, which was probably caused by promotion of Hg-0 oxidation due to the higher flue gas temperature. Compared with air environment, more Hg (3.00-17.96ng/g higher than air at 900 degrees C) was remained in ashes, and the percentage of reactive Hg in flue gases increased by 193%-826% at 900 degrees C under O-2/CO2, which is beneficial for reduction of Hg emissions from coal combustion. ...Hide

DOI：10.1007/s00128-019-02626-w
百度学术：Characteristics of Speciated Mercury Emissions from Coal Combustion in Air and Oxygen-Enriched Environment
语言：外文
人气指数：1
浏览次数：1
基金：National Natural Science Foundation of ChinaNational Natural Science Foundation of China [41630748, 41501517, 41671492]; Natural Science Foundation of TianjinNatural Science Foundation of Tianjin [16JCQNJC08300]
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