Distribution of volatile organic compounds during the combustion process in coal-fired power stations |
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| Institution: | 1. Xi''an Key Laboratory of Solid Waste Recycling and Resource Recovery, Department of Environmental Science and Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710049, China;3. Peng''an Ecological Environment Monitoring Station, Nanchong 637800, China;4. Changsha Center for Mineral Resources Exploration, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Changsha, China;5. Divison of Atmospheric Sciences, Desert Research Institute, Reno NV89512, United States |
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| Abstract: | This study concerns the distribution of volatile organic compounds (VOC) emitted during combustion processes in coal-fired power stations. Thermal desorption technique was employed to analyse VOC concentrations in gaseous emissions (trapped onto Carbotrap B sorbent) and solid samples (coal, fly ash and slag). An empirical parameter (Y) was employed to evaluate the relationships between the compounds emitted during a real combustion process and those obtained in coal analysis by thermal desorption. The Y calculation does not provide any information about VOC emissions through solid effluents as fly ash or slag. A comparison method was created for this purpose. The results obtained using this method confirm that combustion is almost complete for aromatic and aliphatic hydrocarbons. Chlorinated compounds are mainly formed during the combustion. |
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