Prediction of Molecular Weight By-Boiling-Point Distribution of Middle Distillates from Gas Chromatography-Field Ionization Mass Spectrometry (GC-FIMS)

摘要

Molecular weight (MW) and its by-boiling-point distribution are important physical properties of petroieum 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-field ionization mass spectrometry (GC-FIMS) 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.