The pyrolysis experiments of oil shale were performed under different ending temperatures, and the pyrolysis intermediate pyrolysis bitumen were obtained by the solution extraction of semicoke. The component analysis of shale oil and pyrolysis intermediate was implemented by gas chromatography?mass spectrometry characterization method. Furthermore, pyrolysis?gas chromatography?mass spectrometry method was used to analyze the distribution of intermediate decomposition products with comparison of pyrolysis of shale oil. The results showed that the intermediate can be produced and stably exist at a limited temperature range of 350~400℃, yield of intermediate reaches the highest value at the temperature of 375℃. The stage of the highest rate for oil-producing occurred at temperature range of 375~400℃, while yield of pyrolysis intermediate started to decrease. Actually pyrolysis intermediate was thermally unstable during the high temperature. The kerogen cracked to form bitumen intermediate and then transformed to final pyrolysis products immediately. The relative content of light components in intermediate increased with rising temperature. Heteroatom-containing compounds can be first released from kerogen and convert into intermediate products. The generation of alkenes in shale oil may be derived from the decomposition of kerogen without experiencing intermediate stage. The long side chains of aromatic hydrocarbons in intermediate can become short by decomposition.
Mengya LI Jinhui ZHAN Yong TIAN Dengguo LAI Xiaoxing LIU Guangwen XU
. Reaction Characteristics of Intermediate Product during Oil Shale Pyrolysis[J]. The Chinese Journal of Process Engineering, 2017
, 17(6)
: 1316
-1321
.
DOI: 10.12034/j.issn.1009-606X.217150
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