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The Formation of PAH Compounds from the Combustion of Biofuels

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Advances in Energy and Combustion

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Abstract

Polycyclic aromatic hydrocarbons (PAH) are byproducts resulting from the incomplete combustion of hydrocarbon-based fuels such as fuel oils, coal and biofuels. PAH are implicated in the formation of soot, another undesirable byproduct formed during combustion. Such compounds are harmful to human health, and soot plays an important role in climate change. Black carbon is known to absorb visible solar radiation, and the associated organic carbon fraction, including PAH, that is co-emitted can absorb radiation at shorter wavelengths leading to climate forcing. As a result of climate change considerations and the need to reduce greenhouse gas emissions, fossil fuels are slowly being replaced by lower carbon renewable biofuels. However, these biofuels are often carbon based, and so, their incomplete combustion produces a similar range of pollutant species to fossil fuels. These substitute fuels can form PAH compounds, although often to a lesser degree due to differences in the fuel chemistry. The EPA 16 list is widely used to determine the extent of pollution due to PAH but does not include other types of polycyclic aromatic compounds such as oxygenated species (O-PAC) or nitrogenated species (N-PAC) so does not reflect many of the priority pollutants.

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Williams, A., Lea-Langton, A.R., Bartle, K.D. (2022). The Formation of PAH Compounds from the Combustion of Biofuels. In: Gupta, A.K., De, A., Aggarwal, S.K., Kushari, A., Runchal, A.K. (eds) Advances in Energy and Combustion. Green Energy and Technology. Springer, Singapore. https://doi.org/10.1007/978-981-16-2648-7_5

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  • DOI: https://doi.org/10.1007/978-981-16-2648-7_5

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