Thermal Behavior of Oil Shale Pyrolysis under Low-Temperature Co-Current Oxidizing Conditions

Wei Guo; Qinchuan Yang; Xu Zhang; Shaotao Xu; Sunhua Deng; Qiang Li

doi:10.1021/acsomega.1c01875

Thermal Behavior of Oil Shale Pyrolysis under Low-Temperature Co-Current Oxidizing Conditions

ACS Omega. 2021 Jul 7;6(28):18074-18083. doi: 10.1021/acsomega.1c01875. eCollection 2021 Jul 20.

Authors

Wei Guo^{1

2

3

4}, Qinchuan Yang^{1

2

3

4}, Xu Zhang^{1

2

3

4}, Shaotao Xu^{1

2

3

4}, Sunhua Deng^{1

2

3

4}, Qiang Li^{1

2

3

4}

Affiliations

¹ College of Construction Engineering, Jilin University, Changchun 130021, China.
² National-Local Joint Engineering Laboratory of In-situ Conversion, Drilling and Exploitation Technology for Oil Shale, Jilin University, Changchun 130021, China.
³ Provincial and Ministerial Co-construction of Collaborative Innovation Center for Shale Oil & Gas Exploration and Development, Changchun 130021, China.
⁴ Key Lab of Ministry of Natural Resources for Drilling and Exploitation Technology in Complex Conditions, Jilin University, Changchun 130021, China.

Abstract

The thermal behavior of the Huadian oil shale during low-temperature co-current oxidizing pyrolysis was studied by lab-scale experiments under different basic pyrolysis temperatures and input gas flow rates. The results showed that, in the process of oil shale co-current oxidizing pyrolysis, the increasing input gas flow rates under the same basic pyrolysis temperatures can significantly enhance the heat generation of oil shale. Meanwhile, it can be seen from the temperature variation characteristics of oil shale that the heat released by the oxidation reaction of semicoke and oxygen is enough to support the thermal decomposition of organic matter without supplemental heating. Moreover, it can be concluded from the 92.06% effective recovery of shale oil that a high yield of oil without a significant loss can be achieved. Finally, compared with increasing basic pyrolysis temperatures, the increased input gas flow rates have a more obvious effect on improving the effective recovery of shale oil.