Emissions combustion, bituminous coal

The rank of coal (maturity) is an important factor that affects PAH emissions from residential combustion. PAH emission from various coals is found to have a relationship with their volatile contents, and the complete combustion of coals with a high volatile content is more difficult to achieve. Bituminous and sub-bituminous coals with high volatile content yield more PAHs when burned at low temperatures, such as residential combustion, while anthracite coal containing very little volatile matter can burn more completely and emit PAHs with a mass that is three orders of magnitude lower than bituminous coal. Smoky coal, which is burned as fuel for cooking and heating in unvented homes, produces combustion emissions composed primarily of parent PAHs and alkylated PAHs. 

US EPA. AP-42, Chapter 1.1, bituminous and subbituminous coal combustion table 1.1-14, emission factors for various organic compounds from controlled coal combustion. Chapter 1.4, natural gas combustion, table 1.4-4 used for mercury emissions. 1998. 

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