Oil samples

obtained by retorting Huadian oil shale at five different final temperatures

were divided

according to boiling point

into light oil (<300℃) and heavy oil (>300℃). The light oil was analyzed using GC-MS and their components classified to find the regular pattern that is variation of oil chemical composition with final retorting temperature. 1H and 13C nuclear magnetic resonance spectroscopy was employed to analyze the chemical structure of the compounds in the heavy oil. The results show that the majority of Huadian light shale oil is aliphatic series compounds. Among of them

n-alkanes

α-alkenes

n-alkanals and n-alcohols are of homology and all come from alkyl radicals. With the increase of final retorting temperature

length of carbon chains in light oil is shorter and there is more n-aliphatic hydrocarbons in heavy oil

because long chain aliphatic compounds were decomposed and the side chains in branched alkanes broken

while more aromatic ring condensation reactions took place which results in more aromatic rings formation in both light oil and heavy oil as well as increase of condensational degree in light oil.