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Abstract:Composition distribution of a typical commercial gasoline more representative in current market which also meets China V gasoline standard is discussed. The octane number distribution and vapor pressure distribution of the commercial gasoline is also analyzed. In addition, the hydrocarbon making a larger contribution to the octane number or vapor pressure is reached. The results indicate that the commercial gasoline more representative in the current market mainly includes i-paraffin, aromatics and a small amount of olefins in order to meet the China V gasoline standard. Olefin is the main composition which contributes to the octane number and vapor pressure for the light fraction of commercial gasoline. However, in order to meet the V gasoline standards, the olefin content decreases so greatly that we have to add a certain amount of MTBE to make up for the octane value loss and vapor pressure loss of the commercial gasoline. Aromatics are the components that contribute to the octane number for heavy fraction of commercial gasoline. However, the octane number of the middle distillate is relatively absent. In order to satisfy the good combustion performance of commercial gasoline, it is very important to improve the distribution of octane number by adjusting the gasoline component.

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