TY - JOUR
T1 - Optimization of temperature parameters for the autothermic pyrolysis in-situ conversion process of oil shale
AU - Xu, Shaotao
AU - Lü, Xiaoshu
AU - Sun, Youhong
AU - Guo, Wei
AU - Li, Qiang
AU - Liu, Lang
AU - Kang, Shijie
AU - Deng, Sunhua
N1 - Funding Information:
This work was supported by the National Key R&D Program of China (No. 2019YFA0705502 , 2019YFA0705501 ), the Young and Middle-aged Excellent Team Project for Scientific and Technological Innovation of Jilin Province , China, the National Natural Science Foundation of China ( 42202345 ), and the National Natural Science Foundation of China (Grant No. 41972324 , 52074212 ).
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2023/2/1
Y1 - 2023/2/1
N2 - In this study, a temperature optimization strategy for the Huadian oil shale autothermal pyrolysis in-situ conversion process (ATS) was first proposed by systematically investigating the reaction characteristics of various semi-cokes. As the pyrolysis temperature rised, the semi-coke's calorific value was found to undergo three different stages of increasing, decreasing, and flattening, peaking at around 330 °C. Additionally, the semi-cokes formed at different temperatures exhibited similar combustion characteristics, including combustion activation energy, combustion characteristic parameters, and product release characteristics. Due to the serious pore blockage caused by the substantial generation and the ignition coking of the bitumen, the reaction characteristics of semi-cokes were dramatically decreased at about 330 °C. Finally, the relationship between in-situ heat generation and demand at various stages of ATS process was discussed, and a reasonable strategy for the screening of temperature parameters was proposed. According to this strategy, the optimal control temperature for the preheating stage was determined at 350–370 °C and at Tact (defined in 4.3.2) for the retorting zone in the reaction stage. The results of this study provide a new perspective on the theoretical foundation of the ATS process and have crucial guiding implications for practical engineering applications.
AB - In this study, a temperature optimization strategy for the Huadian oil shale autothermal pyrolysis in-situ conversion process (ATS) was first proposed by systematically investigating the reaction characteristics of various semi-cokes. As the pyrolysis temperature rised, the semi-coke's calorific value was found to undergo three different stages of increasing, decreasing, and flattening, peaking at around 330 °C. Additionally, the semi-cokes formed at different temperatures exhibited similar combustion characteristics, including combustion activation energy, combustion characteristic parameters, and product release characteristics. Due to the serious pore blockage caused by the substantial generation and the ignition coking of the bitumen, the reaction characteristics of semi-cokes were dramatically decreased at about 330 °C. Finally, the relationship between in-situ heat generation and demand at various stages of ATS process was discussed, and a reasonable strategy for the screening of temperature parameters was proposed. According to this strategy, the optimal control temperature for the preheating stage was determined at 350–370 °C and at Tact (defined in 4.3.2) for the retorting zone in the reaction stage. The results of this study provide a new perspective on the theoretical foundation of the ATS process and have crucial guiding implications for practical engineering applications.
KW - Combustion characteristics
KW - Heat relationship
KW - Kinetic analysis
KW - Oil shale
KW - Temperature optimization
UR - http://www.scopus.com/inward/record.url?scp=85143319172&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2022.126309
DO - 10.1016/j.energy.2022.126309
M3 - Article
AN - SCOPUS:85143319172
SN - 0360-5442
VL - 264
JO - Energy
JF - Energy
M1 - 126309
ER -
