In this study, the spray auto-ignition properties of binary primary reference fuels (PRFs) of 2,2,4-trimethylpentane and n-heptane with different research octane numbers (RONs) were measured according to the industry standard NB/SH/T 6035 to determine their ignition delay times at various initial temperatures. Furthermore, the auto-ignition properties were investigated after blending the PRFs with various amounts of ethanol. The results revealed a very good correlation between the derived cetane number and the RON for the PRFs in both the presence and absence of ethanol. In addition, a concept of ignition delay sensitivity was developed for ethanol-containing fuels that exhibited a close relationship with the octane sensitivity, which is defined as the RON minus the motor octane number (MON). Finally, the developed method was applied to conveniently estimate the RON and MON values of several ethanol-containing fuels by simply measuring their auto-ignition properties.

Wang Jun;Yang He;Hu Xiaoming;Song Haiqing;Zhang Ran;Tian Huayu

SINOPEC Research Institute of Petroleum Processing,Beijing 100083

中国炼油与石油化工（英文版）

[1]Wang Jun;Yang He;Hu Xiaoming;Song Haiqing;Zhang Ran;Tian Huayu-.Influence of Ethanol Addition on the Spray Auto-ignition Properties of Gasoline and Its Relationship with Octane Number)[J].中国炼油与石油化工（英文版）,2022(02):68-75

Octane,PRFs,trimethylpentane,RONs

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