Hydrocarbons
Gasoline contains hydrocarbon components such as aromatics, olefins, and benzene, which are naturally present in crude petroleum.
The aromatics content of gasoline is directly linked to the air pollution emitted from a gasoline engine’s exhaust system. Thus, reducing aromatics content may lower an engine’s total hydrocarbon emissions. Reducing aromatics may also reduce emissions from benzene and toluene, but it could increase aldehyde emissions.
Sudan’s gasoline specifications regulates aromatics at 40% v/v, olefins content at 35% v/v and benzene content at 2.5% v/v.
SGS Worldwide Fuel Survey results on gasoline samples taken in 2017-2019 showed hydrocarbons content of all samples was consistently below the limits established except for benzene content in 2017.
Average aromatics content of gasoline samples, 2017-2019
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Source: SGS Worldwide Fuel Survey, 2022
Average olefins content of gasoline samples, 2017-2019
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Source: SGS Worldwide Fuel Survey, 2022
Average benzene content of gasoline samples, 2017-2019
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Source: SGS Worldwide Fuel Survey, 2022