Please can someone help me with molecular weight of premium motor spirit (PMS), kerosene and gasoline.
Good morning Nleonu Emmanuel Chile,
Concerning the molecular weight of petroleum products:
Both gasoline and diesel fuel consist of hundreds of different hydrocarbon molecules. In addition, several bio-origin components, such as ethanol in gasoline blending, are common.
Gasoline contains mainly alkanes (paraffins), alkenes (olefins), and aromatics. Diesel fuel consists mainly of paraffins, aromatics and naphthenes. The hydrocarbons of gasoline contain typically 4-12 carbon atoms with boiling range between 30 and 210 °C, whereas diesel fuel contains hydrocarbons with approximately 12–20 carbon atoms and the boiling range is between 170 and 360 °C. Gasoline and diesel fuel contain approximately 86 wt-% of carbon and 14 wt-% of hydrogen but the hydrogen to carbon ratio changes somewhat depending on composition.
Gasoline molecular weight range is 60-150 g/mol. Non-limited Diesel fuel molecular weight range is 150-250 g/mol.
Kerosene is a mixture of hydrocarbons. It is mixture of 10 to 16 carbon atoms in branched and straight chain. Kerosene, also known as paraffin, lamp oil, and coal oil (an obsolete term), is a combustible hydrocarbon liquid which is derived from petroleum, widely used as a fuel in industry.
Like gasoline and diesel fuel, kerosene is NOT a pure substance with just one chemical formula. Dodecane, which is a molecule made up of 12 carbons and 26 hydrogens, is sometimes used as a “typical” molecule of kerosene. Dodecane’s molecular weight: 170.33 g/mol.
Regards,
Marco
Dear Dr. Chile,
Depending on HC-compositions of your products, the tables presented in the following sources may be helpful for you:
https://pubs.acs.org/doi/epdf/10.1021/ie950484l
https://pubs.acs.org/doi/abs/10.1021/ie50252a024
https://www.tandfonline.com/doi/abs/10.1081/LFT-200032846
https://www.ncbi.nlm.nih.gov/books/NBK231234/
Good luck.
LC
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