CH4 and CO2 monitoring in the air of underground coal mines in southern Brazil and GHG emission estimation
| Autor: | Rafael Colombo Abruzzi, Beatriz Bonetti, Carolina Pereira Peglow, Marçal Pires, Cleber José Baldoni Gomes |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
lcsh:TN1-997
business.industry General Engineering Environmental engineering Coal mining emissions Sampling (statistics) Structural basin Methane chemistry.chemical_compound chemistry lcsh:TA1-2040 Greenhouse gas Carbon dioxide greenhouse gases General Earth and Planetary Sciences Environmental science Coal business lcsh:Engineering (General). Civil engineering (General) underground coal mines lcsh:Mining engineering. Metallurgy General Environmental Science Flammability limit |
| Zdroj: | REM-International Engineering Journal v.72 n.4 2019 REM-International Engineering Journal Fundação Gorceix (FG) instacron:FG REM-International Engineering Journal, Volume: 72, Issue: 4, Pages: 635-642, Published: 16 SEP 2019 REM: International Engineering Journal, Vol 72, Iss 4, Pp 635-642 |
| Popis: | This study aims to assess methane (CH4) and carbon dioxide (CO2) concentrations in the ventilation systems of two coal mines (A and B) in the Santa Catarina coal deposit in southern Brazil (Parana Basin, Bonito Formation), and estimate their greenhouse gas (GHG) emissions. The highest CH4 levels (1.8%) were recorded in strong methane emanation areas in mine A, below the lower explosive limit (5%). The IPCC-recommended methods significantly overestimated the methane emission (up to 80%) when compared to the experimental data measured for each mine. Application of an alternative method made it possible to estimate direct CO2 emissions, indicating that CO2 accounted for 22 to 77% of total GHG emissions. Carbon dioxide emissions are generally not included in GHG emission inventories, indicating that the coal industry underestimates the contribution of this gas. As such, it is recommended that the methodology used for these calculations be revised and that specific emission factors be applied for each mine. In order to improve the accuracy of inventories, more sampling needs to be carried out in all operational and abandoned mines. |
| Databáze: | OpenAIRE |
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