Formation and emission characteristics of VOCs from a coal-fired power plant  

作　　者：Jingying Xu Yue Lyu Jiankun Zhuo Yishu Xu Zijian Zhou Qiang Yao 

机构地区：[1]Department of New Energy Science and Engineering,School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China [2]State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China [3]Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China [4]Department of Power Engineering and Mechanics,School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第7期256-264,共9页中国化学工程学报（英文版）

基　　金：funded by the National Natural Science Foundation of China(52006079);the Natural Science Foundation of Hubei Province(2020CFB247);the National Key Research and Development Program of China(2018YFB0605201)。

摘　　要：On-site measurements of volatile organic compounds(VOCs)in different streams of flue gas were carried out on a real coal-fired power plant using sampling bags and SUMMA canisters to collect gas samples,filters to collect particle samples.Gas chromatography-flame ionization detector/mass spectrometry and gas chromatography-mass spectrometry was the offline analysis method.We found that the total mass concentration of the tested 102 VOC species at the outlet of wet flue gas desulfuration device was(13456±47)μg·m^(-3),which contained aliphatic hydrocarbons(57.9%),aromatic hydrocarbons(26.8%),halogen-containing species(14.5%),and a small amount of oxygen-containing and nitrogencontaining species.The most abundant species were 1-hexene,n-hexane and 2-methylpentane.The top ten species in terms of mass fraction(with a total mass fraction of 75.3%)were mainly hydrocarbons with a carbon number of 6 or higher and halogenated hydrocarbons with a lower carbon number.The mass concentration of VOC species in the particle phase was significantly lower than that in the gas phase.The change of VOC mass concentrations along the air pollution control devices indicates that conventional pollutant control equipment had a limited effect on VOC reduction.Ozone formation potential calculations showed that aromatic hydrocarbons contributed the highest ozone formation(46.4%)due to their relatively high mass concentrations and MIR(maximum increment reactivity)values.

关 键 词：Volatile organic compounds Coal combustion Ozone formation potential Coal-fired power plant On-site measurement 

分 类 号：X773[环境科学与工程—环境工程]