IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v278y2023ipas0360544223013233.html
   My bibliography  Save this article

Confinement effect on transport diffusivity of adsorbed CO2–CH4 mixture in coal nanopores for CO2 sequestration and enhanced CH4 recovery

Author

Listed:
  • Guang, Wenfeng
  • Zhang, Zhenyu
  • Zhang, Lei
  • Ranjith, P.G.
  • Hao, Shengpeng
  • Liu, Xiaoqian

Abstract

The transport of CO2–CH4 mixture in coal nanopores is crucial to CO2-enhanced coalbed (CO2-ECBM) recovery, but is highly challenging on adsorption-diffusion dominated nanoscale due to the gas-surface and intermolecular interactions. Using Monte Carlo and molecular dynamics simulation, the confinement effect of nanopores with two slit widths (2 and 6 nm) on the CO2–CH4 binary diffusion in the adsorption layer are investigated. A modified computational method for multi-component transport diffusivity in the adsorption layer is proposed by incorporating the survival probability function. The results show that the transport diffusivity in the semi-confined adsorption layer shows a general decreasing tendency with the increase of pressure, while it slightly decreases when the pressure <6.4 MPa in the confined adsorption layer, following an inverse parabola trend with the maximum value at around 12 MPa. Three mechanisms are classified regarding this pressure-dependent evolution. Firstly, the collision between molecules of weaker attraction and surface dominates the transport capacity, and this collisional frequency reduces at the low-pressure region. Accompanying the pressure exceeds the critical threshold, surface diffusion becomes the primary contribution. Lastly, significant intermolecular interactions appear after the adsorption saturation. During the CO2-ECBM process, pressure drawdown is the primary method to release the adsorbed CH4, and the largest recovery ratio can reach 25.9% in 2 nm micropore and 30.1% in 6 nm mesopore. After the early CO2 injection, the transport diffusion of CH4 exceeds that of CO2, and the selectivity of CH4 over CO2 increases in the subsequent CO2 huff-n-puff cycles. The CO2–CH4 mixture under greater confinement effect manifests higher diffusion selectivity, which benefits the separation of the CO2–CH4 mixture and further contributes to the CH4 recovery.

Suggested Citation

  • Guang, Wenfeng & Zhang, Zhenyu & Zhang, Lei & Ranjith, P.G. & Hao, Shengpeng & Liu, Xiaoqian, 2023. "Confinement effect on transport diffusivity of adsorbed CO2–CH4 mixture in coal nanopores for CO2 sequestration and enhanced CH4 recovery," Energy, Elsevier, vol. 278(PA).
    • Handle: RePEc:eee:energy:v:278:y:2023:i:pa:s0360544223013233
    DOI: 10.1016/j.energy.2023.127929
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544223013233
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2023.127929?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Bai, Yang & Lin, Hai-Fei & Li, Shu-Gang & Yan, Min & Long, Hang, 2021. "Molecular simulation of N2 and CO2 injection into a coal model containing adsorbed methane at different temperatures," Energy, Elsevier, vol. 219(C).
    2. Shan, Baochao & Wang, Runxi & Guo, Zhaoli & Wang, Peng, 2021. "Contribution quantification of nanoscale gas transport in shale based on strongly inhomogeneous kinetic model," Energy, Elsevier, vol. 228(C).
    3. Huang, Liang & Ning, Zhengfu & Wang, Qing & Zhang, Wentong & Cheng, Zhilin & Wu, Xiaojun & Qin, Huibo, 2018. "Effect of organic type and moisture on CO2/CH4 competitive adsorption in kerogen with implications for CO2 sequestration and enhanced CH4 recovery," Applied Energy, Elsevier, vol. 210(C), pages 28-43.
    4. Wang, Hui & Chen, Li & Qu, Zhiguo & Yin, Ying & Kang, Qinjun & Yu, Bo & Tao, Wen-Quan, 2020. "Modeling of multi-scale transport phenomena in shale gas production — A critical review," Applied Energy, Elsevier, vol. 262(C).
    5. Lin, Kui & Zhao, Ya-Pu, 2021. "Entropy and enthalpy changes during adsorption and displacement of shale gas," Energy, Elsevier, vol. 221(C).
    6. Wang, Tianyu & Tian, Shouceng & Li, Gensheng & Zhang, Liyuan & Sheng, Mao & Ren, Wenxi, 2021. "Molecular simulation of gas adsorption in shale nanopores: A critical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 149(C).
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Wang, Tianyu & Tian, Shouceng & Li, Gensheng & Zhang, Liyuan & Sheng, Mao & Ren, Wenxi, 2021. "Molecular simulation of gas adsorption in shale nanopores: A critical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 149(C).
    2. Li, Jiawei & Sun, Chenhao, 2022. "Molecular insights on competitive adsorption and enhanced displacement effects of CO2/CH4 in coal for low-carbon energy technologies," Energy, Elsevier, vol. 261(PB).
    3. Xie, Weidong & Wang, Hua & Vandeginste, Veerle & Chen, Si & Gan, Huajun & Wang, Meng & Yu, Zhenghong, 2023. "Thermodynamic and kinetic affinity of CO2 relative to CH4 and their pressure, temperature and pore structure sensitivity in the competitive adsorption system in shale gas reservoirs," Energy, Elsevier, vol. 277(C).
    4. Lei Pan & Ling Chen & Peng Cheng & Haifeng Gai, 2022. "Methane Storage Capacity of Permian Shales with Type III Kerogen in the Lower Yangtze Area, Eastern China," Energies, MDPI, vol. 15(5), pages 1-23, March.
    5. Qin, Chao & Jiang, Yongdong & Zuo, Shuangying & Chen, Shiwan & Xiao, Siyou & Liu, Zhengjie, 2021. "Investigation of adsorption kinetics of CH4 and CO2 on shale exposure to supercritical CO2," Energy, Elsevier, vol. 236(C).
    6. Qin, Chao & Jiang, Yongdong & Zhou, Junping & Zuo, Shuangying & Chen, Shiwan & Liu, Zhengjie & Yin, Hong & Li, Ye, 2022. "Influence of supercritical CO2 exposure on water wettability of shale: Implications for CO2 sequestration and shale gas recovery," Energy, Elsevier, vol. 242(C).
    7. Sun, Fuqiang & Du, Shuheng & Zhao, Ya-Pu, 2022. "Fluctuation of fracturing curves indicates in-situ brittleness and reservoir fracturing characteristics in unconventional energy exploitation," Energy, Elsevier, vol. 252(C).
    8. Xuhua Gao & Junhong Yu & Xinchun Shang & Weiyao Zhu, 2023. "Investigation on Nonlinear Behaviors of Seepage in Deep Shale Gas Reservoir with Viscoelasticity," Energies, MDPI, vol. 16(17), pages 1-23, August.
    9. Yang, Xue & Chen, Zeqin & Liu, Xiaoqiang & Xue, Zhiyu & Yue, Fen & Wen, Junjie & Li, Meijun & Xue, Ying, 2022. "Correction of gas adsorption capacity in quartz nanoslit and its application in recovering shale gas resources by CO2 injection: A molecular simulation," Energy, Elsevier, vol. 240(C).
    10. Shan Yuan & Hong-Ze Gang & Yi-Fan Liu & Lei Zhou & Muhammad Irfan & Shi-Zhong Yang & Bo-Zhong Mu, 2022. "Adsorption and Diffusion Behaviors of CO 2 and CH 4 Mixtures in Different Types of Kerogens and Their Roles in Enhanced Energy Recovery," Sustainability, MDPI, vol. 14(22), pages 1-21, November.
    11. Tao, Huayu & Qian, Xi & Zhou, Yi & Cheng, Hongfei, 2022. "Research progress of clay minerals in carbon dioxide capture," Renewable and Sustainable Energy Reviews, Elsevier, vol. 164(C).
    12. Yang, Jinghua & Wang, Min & Wu, Lei & Liu, Yanwei & Qiu, Shuxia & Xu, Peng, 2021. "A novel Monte Carlo simulation on gas flow in fractal shale reservoir," Energy, Elsevier, vol. 236(C).
    13. Liu, Huang & Yao, Desong & Yang, Bowen & Li, Huashi & Guo, Ping & Du, Jianfen & Wang, Jian & Yang, Shuokong & Wen, Lianhui, 2022. "Experimental investigation on the mechanism of low permeability natural gas extraction accompanied by carbon dioxide sequestration," Energy, Elsevier, vol. 253(C).
    14. Wenchao Liu & Yuejie Yang & Chengcheng Qiao & Chen Liu & Boyu Lian & Qingwang Yuan, 2023. "Progress of Seepage Law and Development Technologies for Shale Condensate Gas Reservoirs," Energies, MDPI, vol. 16(5), pages 1-30, March.
    15. Li, Jing & Xie, Yetong & Liu, Huimin & Zhang, Xuecai & Li, Chuanhua & Zhang, Lisong, 2023. "Combining macro and micro experiments to reveal the real-time evolution of permeability of shale," Energy, Elsevier, vol. 262(PB).
    16. Bowen Ling & Hasan J. Khan & Jennifer L. Druhan & Ilenia Battiato, 2020. "Multi-Scale Microfluidics for Transport in Shale Fabric," Energies, MDPI, vol. 14(1), pages 1-23, December.
    17. Wang, Kai & Wang, Yanhai & Xu, Chao & Guo, Haijun & Xu, Zhiyuan & Liu, Yifu & Dong, Huzi & Ju, Yang, 2023. "Modeling of multi-field gas desorption-diffusion in coal: A new insight into the bidisperse model," Energy, Elsevier, vol. 267(C).
    18. Wu, Jian & Gan, Yixiang & Shi, Zhang & Huang, Pengyu & Shen, Luming, 2023. "Pore-scale lattice Boltzmann simulation of CO2-CH4 displacement in shale matrix," Energy, Elsevier, vol. 278(PB).
    19. Yijie Xing & Xianming Xiao & Qin Zhou & Wei Liu & Yanming Zhao, 2023. "Influence of Water on the Methane Adsorption Capacity of Organic-Rich Shales and Its Controlling Factors: A Review," Energies, MDPI, vol. 16(8), pages 1-29, April.
    20. Tao Zhang & Shuyu Sun, 2021. "Thermodynamics-Informed Neural Network (TINN) for Phase Equilibrium Calculations Considering Capillary Pressure," Energies, MDPI, vol. 14(22), pages 1-16, November.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:278:y:2023:i:pa:s0360544223013233. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.