Evaluation of gas emissions from coal stockpile

Gas emissions of carbon dioxide, methane, dimethylsulfide, carbon monoxide and oxygen from a coal stockpile in Velenje were determined. Gases from the coal stockpile were collected in Alltech Standard sampling bags and then analysed using a capillary gas chromatograph and electrochemical sensors. A...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2004-05, Vol.55 (8), p.1121-1126
Main Authors: Kozinc, J, Zupančič-Kralj, L, Zapušek, A
Format: Article
Language:English
Subjects:
Applied sciences
Atmospheric pollution
Carbon Dioxide
Carbon Monoxide
Chromatography, Gas
Coal - analysis
Coal gas emissions
Combustion and energy production
Dimethylsulfide
Emission factors
Environmental Monitoring
Exact sciences and technology
Gas chromatography
Gases - analysis
Methane
Oxygen
Pollution
Pollution sources. Measurement results
Seasons
Slovenia
Sulfides
Temperature
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Summary:Gas emissions of carbon dioxide, methane, dimethylsulfide, carbon monoxide and oxygen from a coal stockpile in Velenje were determined. Gases from the coal stockpile were collected in Alltech Standard sampling bags and then analysed using a capillary gas chromatograph and electrochemical sensors. A flame ionisation detector equipped with a Zr/Ni catalytic reactor was used for the determination of methane and carbon dioxide. Dimethylsulfide was detected with a flame photometric detector, and the concentrations of carbon monoxide and oxygen were determined by use of electrochemical sensors. The results showed that the main influence on gas emissions is related to the ambient temperature. Emissions of carbon dioxide during summer 2001 (average temperature during sampling period was 24 °C) were approximately 30-times higher than during winter 2002 (average temperature during sampling period was −2 °C) and were also influenced by the oxygen concentration. Carbon dioxide is mainly formed by oxidation of coal. Methane and dimethylsulfide are desorbed from coal, and are present in higher concentrations in stockpile emissions when stockpiles are renewed. The dimethylsulfide concentration, in contrast to laboratory experiments in stockpile emissions, falls immediately due to photo-degradation.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2003.08.034