Hydrogen transfer and reaction mechanism during in-situ pyrolysis of Fushun oil shale with steam injection

被引:0
|
作者
Kang, Zhiqin [1 ,2 ]
Huang, Dongwei [1 ,2 ]
Zhao, Jing [1 ,2 ]
Fan, Sijie [1 ,2 ]
Yang, Dong [1 ,2 ]
Lu, Yang [1 ,2 ]
机构
[1] Taiyuan Univ Technol, Key Lab Insitu Property Improving Min, Minist Educ, Taiyuan 030024, Peoples R China
[2] Taiyuan Univ Technol, Insitu Steam Inject Branch, State Ctr Res & Dev Oil Shale Exploitat, Taiyuan 030024, Peoples R China
基金
中国国家自然科学基金;
关键词
Oil Shale; In-situ Pyrolysis; Steam Injection; Hydrogen Transfer; Reaction Mechanism; TRANSFER ROUTE; EVOLUTION; PRODUCTS; BEHAVIOR; KINETICS; COAL; GAS;
D O I
10.1016/j.fuel.2024.133583
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The upgrading of pyrolysis oil and gas during the in-situ mining of oil shale is the key focus point to realize its large-scale clean and efficient utilization. Steam injection significantly improved the quality of shale oil and gas during in-situ pyrolysis of oil shale. However, the oil and gas upgrading mechanism of oil shale during steam pyrolysis is still unclear, which is closely related to the migration behavior of hydrogen in steam and oil shale. Thus, in this work, isotope tracing method have been adopted to investigate the hydrogen migration and reaction mechanism during the steam pyrolysis of oil shale. The results show that the presence of steam promotes the pyrolysis behavior of oil shale, and the yield of shale oil is 1.5 times of anhydrous pyrolysis. The H2 concentration in the pyrolysis gas during steam pyrolysis of oil shale is up to 65.4%. The hydrogen in steam can migrate to all pyrolysis products, with migration amounts of 89.1% for pyrolysis water, 1.5% for pyrolysis gas, 3.5% for shale oil, and 5.9% for solid residue. The H center dot free radicals are inclined to attack the O site of cracked oil fragments during pyrolysis, followed by the alpha site. However, the O content of shale oil decrease during steam pyrolysis of oil shale, and the hydrogen in steam mostly enteres into shale oil in the form of H center dot, combining with cracked oil fragments to form short-chain aliphatic hydrocarbons and inhibiting the polymerization of cracked oil fragments into shale char. Meanwhile, steam also promote the migration of inherent hydrogen from oil shale to shale oil during pyrolysis, resulting from the cracking of kerogen induced by H center dot and displacement effect of steam. The steam pyrolysis of oil shale is controlled by multiple reaction mechanisms in both primary and secondary reactions, including induced cracking, hydrogenation, and steam flooding. This work provides theoretical support and technical guidance for the in-situ clean and efficient development of oil shale.
引用
收藏
页数:12
相关论文
共 50 条
  • [21] Pilot test of in-situ steam injection for oil and gas production from oil shale and applicability of multi-mode in-situ thermal recovery technology
    Kang Z.
    Zhao Y.
    Yang D.
    Zhao J.
    Wang L.
    Shiyou Xuebao/Acta Petrolei Sinica, 2021, 42 (11): : 1458 - 1468
  • [22] Numerical simulation of oil shale in-situ exploration productivity comparison between steam injection and electrical heating
    Lei, Zhihong
    Zhang, Yulong
    Yang, Zijiang
    Shi, Yu
    Zhang, Hongyuan
    Li, Xiaojiang
    Cui, Qiliang
    APPLIED THERMAL ENGINEERING, 2024, 238
  • [23] A calculation model about reservoir thermal efficiency of in-situ upgrading for oil shale via steam injection
    Zheng, Yang
    Lei, Guanglun
    Yao, Chuanjin
    Fu, Jingang
    Wang, Long
    Zhang, Xin
    Jia, Xiaofei
    JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, 2020, 192
  • [24] Sustainable in-situ steam injection approach for shale oil extraction in Xinjiang, China: A technical and economic analysis
    Zheng, Shuangjin
    Liu, Bo
    Erfan, Mohammadian
    Liu, Yan
    Tian, Shansi
    ENERGY, 2024, 308
  • [25] Design and Numerical Simulation of In-Situ Pyrolysis of Oil Shale Through Horizontal Well Fracturing with Nitrogen Injection
    Jiang, Pengfei
    Zhang, Danlei
    Li, Bin
    Song, Chao
    INTERNATIONAL JOURNAL OF HEAT AND TECHNOLOGY, 2021, 39 (02) : 417 - 423
  • [26] Comparative study on the pyrolysis behavior and pyrolysate characteristics of Fushun oil shale during anhydrous pyrolysis and sub/supercritical water pyrolysis
    Lu, Yang
    Wang, Zhijing
    Kang, Zhiqin
    Li, Wei
    Yang, Dong
    Zhao, Yangsheng
    RSC ADVANCES, 2022, 12 (26) : 16329 - 16341
  • [27] Evolution Law of Porosity and Permeability in In-Situ Pyrolysis Zone of Oil Shale
    Zhang, Yunfeng
    Jiang, Pengfei
    Li, Changsuo
    Zhao, Zhiqiang
    Gao, Shuai
    Yao, Song
    Sui, Haibo
    Huang, Jiaqi
    INTERNATIONAL JOURNAL OF HEAT AND TECHNOLOGY, 2023, 41 (01) : 224 - 230
  • [28] Effect of in-situ pyrolysis on physical properties of oil shale and groundwater quality
    Li R.
    He S.
    Yuan H.
    Liu B.
    Ji D.
    Song Y.
    Liu B.
    Yu J.
    Xu Y.
    Huagong Jinzhan/Chemical Industry and Engineering Progress, 2023, 42 (06): : 3309 - 3318
  • [29] Study on pyrolysis kinetics and reaction mechanism of Beizao oil shale
    Zhang, Juan
    Ding, Yanming
    Du, Wenzhou
    Lu, Kaihua
    Sun, Lulu
    FUEL, 2021, 296
  • [30] Sealing effects of marginal gas injection on oil shale in situ pyrolysis exploitation
    Liu, Zhao
    Sun, Youhong
    Guo, Wei
    Li, Qiang
    JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, 2020, 189 (189)