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PREDICTION FOR THE CETANE NUMBER OF DIESEL FUELS FROM REFRACTIVE INDEX

Nd G, In C

Abstract

The equations specified in GB/T11139-89, ASTM D976-80 and ASTM D976-93, which are used for prediction of the cetane number of diesel fuels, were verified through making a comparison between the calculated value and measured value of hundreds of diesel fuel samples. Moreover, a new equation for predicting the cetane number of diesel fuels from their refractive index was raised in this paper because the refractive index reflects the information about molecular structure and molecular weight of various hydrocarbon compounds. The experimental results show that the equation is a rapid, simple and accuracy method for the calculation of cetane number of diesel fuels.

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Key concepts: Cetane number, Diesel fuel, Refractive index, Hydrocarbon, Thermodynamics, Chemistry, Environmental science, Materials science