Studies on the co-pyrolysis characteristics of oil shale and spent oil shale

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• 作者：Zhijun Wang ; Xuexia Liu ; Yinfeng Wang…
• 关键词：Oil shale ; Co ; pyrolysis ; Subcritical water ; Kinetics ; Inorganic mineral
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：123
• 期：2
• 页码：1707-1714
• 全文大小：1,007 KB
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• 作者单位：Zhijun Wang (1)
  Xuexia Liu (1)
  Yinfeng Wang (1)
  Lijun Liu (1)
  Hongyan Wang (2)
  Sunhua Deng (3)
  Youhong Sun (3)
  
  1. School of Chemistry and Chemical Engineering, Institute of Applied Chemistry and Key Laboratory of Coordination Chemistry of Jiangxi Province, Jinggangshan University, Ji’an, 343009, People’s Republic of China
  2. College of Chemistry, Jilin University, Changchun, 130012, People’s Republic of China
  3. College of Construction Engineering, Jilin University, Changchun, 130026, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Sciences
  Polymer Sciences
  Physical Chemistry
  Inorganic Chemistry
  Measurement Science and Instrumentation
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1572-8943

文摘

Co-pyrolysis of oil shale from different regions with spent oil shale from subcritical water extraction experiments is experimentally conducted using thermogravimetric analysis (TG). The mixture samples (oil shale/spent oil shale in blending ratio of 1:1) are heated from 30 up to 850 °C with heating rate of 5, 10 and 30 °C min−1, nitrogen flow rate of 30 mL min−1. Three different stages are identified based on TG curves of the mixture samples. The second stage which is due to the release of volatile matter is the primary reaction stage, and the mass loss discrepancies of the experimental and calculated TG profiles in the second stage are considered as a measurement of the interactions extent during the co-pyrolysis. The experimental mass loss of Nong’an and Fushun oil shale/spent oil shale mixture samples is higher than the calculated data, and the experimental mass loss of Huadian and Mudanjiang oil shale/spent oil shale mixture samples is lower than the calculated data. It is concluded that the interaction effect obviously occurred during the co-pyrolysis of oil shale and spent oil shale. In addition, the effect of kaoline and montmorillonite on the cracking of the kerogen is discussed according to the co-pyrolysis of kerogen and inorganic mineral. The release index of the kerogen, kerogen/kaolinite and kerogen/montmorillonite is 2.06 × 107, 4.58 × 107 and 1.89 × 107 % K−3 min−1, respectively. And the kinetic parameters of the samples are obtained by Kissinger–Akahira–Sunose method based on the thermogravimetric data, and the apparent activation energy of the kerogen, kerogen/kaolinite and kerogen/montmorillonite is 58.4, 25.7 and 95.9 kJ mol−1, respectively. According to the release index and the kinetic parameters of the samples, we can conclude that the kaolinite is helpful for the pyrolysis of kerogen and the montmorillonite inhibits the pyrolysis of kerogen. Keywords Oil shale Co-pyrolysis Subcritical water Kinetics Inorganic mineral