Estimation of greenhouse gas emission factors for natural gas in Bangladesh
Abstract
Anthropogenic greenhouse gas emissions from fossil fuel burnings are strongly affected by fuel properties, operation procedure, emission control etc. Production of indigenous natural gas is around 23 billion metric tons/year from 120 wells of 19 fields in Bangladesh. At the production sites mole percent of methane in the natural gas varies from 93.50 to 98.00. Gas chromatography study on a sample from a natural gas based electric power station at Ashuganj shows that the fuel have lower heating value of 34.9389MJ/m3, 96.60 mole percent CH4, 0.54 mole percent N2, 0.10 mole percent CO2 and the rest other hydrocarbons. The average transmission and distribution losses of natural gas over the country is 1.77% and the estimated emission factors for main greenhouse gases are 55.52 gCO2/MJ, 0.35 gCH4/MJ and 0.17 gN2O/MJ. Considering global warming potentials of Intergovernmental Panel on Climate Change 2007 report the equivalent CO2 emission factor for natural gas in Bangladesh is 115.04 gCO2e/MJ.
Keywords
Fossil fuel, Greenhouse gases(ghg), Ghg emission factors