CH4 and CO2 monitoring in the air of underground coal mines in southern Brazil and GHG emission estimation
AUTOR(ES)
Bonetti, Beatriz
FONTE
REM, Int. Eng. J.
DATA DE PUBLICAÇÃO
16/09/2019
RESUMO
Abstract 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 (Paraná 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.
Documentos Relacionados
- Fatores que influem na emissão de CO2 e CH4 em áreas alagáveis interfluviais do médio Rio Negro
- Soil CH4 and N2O Emissions from Rice Paddy Fields in Southern Brazil as Affected by Crop Management Levels: a Three-Year Field Study
- Redução da emissão de CO2, CH4 e H2S através da compostagem de dejetos suínos
- Determination of CO2, CH4 and N2O: a Case Study for the City of Rio de Janeiro Using a New Sampling Method
- Photosynthetic CO2 Fixation at Air Levels of CO2 by Isolated Spinach Chloroplasts 1