Abstract
Gasoline is a mixture of about 100 hydrocarbon compounds. Molecular carbon numbers range from C6–C12 and evaporating between ambient temperatures to about 220°C. Gasoline is used in spark ignition engines (cars and motorcycles). The grades and types of gasoline are usually defined in terms of octane numbers. The specifications of gasoline is based mainly on physical properties, which can be related to performance such as volatility and octane number. Chemical components such as oxygen, sulfur, lead, and benzene are also significant. The present trend is to incorporate generic fractions such as aromatics and olefinics in the specifications. How these parameters (specifications) relate to the various fuel requirements and subsequently affect the environment is described in this article.
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