Prediction of Molecular Weight By-Boiling-Point Distribution of Middle Distillates from Gas Chromatography鈭扚ield Ionization Mass Spectrometry (GC鈭扚IMS)
Molecular weight (MW) and its by-boiling-point distribution are important physical properties of petroleum feedstocks. In this study, a quick and convenient method was developed to determine the MW by-boiling-point distribution using off-the-shelf gas chromatography鈭抐ield ionization mass spectrometry (GC鈭扚IMS) data. A total of 12 middle distillate samples having different boiling ranges and hydrocarbon-type distributions were used to validate the method. Distillation was performed with the 12 samples to obtain 8 boiling fractions for each sample. The MW was then measured with each fraction. The predicted MW by boiling-point distributions matched well with those measured by experiment, with an average deviation of 3.2%, indicating a good capability and predictability of the developed method.
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