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  Oil Shale

ISSN 1736-7492 (electronic)  ISSN 0208-189X (print)
Published since 1984

Oil Shale

ISSN 1736-7492 (electronic)  ISSN 0208-189X (print)
Published since 1984
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AUTOCLAVE PYROLYSIS EXPERIMENTS OF CHINESE LIUSHUHE OIL SHALE TO SIMULATE IN-SITU UNDERGROUND THERMAL CONVERSION; pp. 103–114
(Full article in PDF format)   doi: 10.3176/oil.2012.2.02


Authors

DEWEN ZHENG, SHUYUAN LI, GUILI MA, HONGYAN WANG

Abstract

Laboratory level autoclave pyrolysis experiments of Chinese Liushuhe oil shale have been conducted at different heating temperatures and pressures to simulate underground in-situ thermal conversion. Effects of water and metallic ions on oil shale pyrolysis have been investigated. In the presence of water, pyrolysis of oil shale generates thermal bitumen as an intermediate product at first, then pyrolysis of bitumen produces shale oil and gas takes place. With increasing temperature, the yields of shale oil and gas increase gradually, while the yield of bitumen initially increases (max. at 300 °C) and then decreases. Compared with the modified Fisher Assay, auto­clave pyrolysis temperature of simulated experiment was 100 °C lower when reaching the same conversion level of oil shale. Analysis of the gas chromato­graphy–mass spectrometry (GC-MS) showed that main chemical compounds of the light fraction in shale oil are phenols and benzenes. The analyses of gas chromatography showed high percentage of carbon dioxide and low per­centage of hydrocarbons. The research results could provide theoretical information for underground in-situ thermal conversion of oil shale.

Keywords

autoclave pyrolysis, oil shale, bitumen, intermediate product, shale oil, Fischer Assay, GC-MS.

References

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  7. Johannes , I. , Tiikma , L. , Zaidentsal , A. A comparison of thermobituminization kinetics of Baltic oil shale in open retorts and autoclaves. Oil Shale , 2010 , 27(1) , 17–25.
http://dx.doi.org/10.3176/oil.2010.1.03

  8. Li , S. , Ling , S. , Gao , S. Effect of minerals on the hydrocarbon generation from kerogen. Journal of China University of Petroleum , 2002 , 26(1) , 69–74 (in Chinese).

  9. Xia , J. Modeling study on the heat transfer of in-situ oil shale retorting. MS Thesis of Taiyuan University of Technology , 2007 (in Chinese).
 
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