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Economic and Technical Analysis of Power to Gas Factory Taking Karamay as an Example

Author

Listed:
  • Wenyin Jiang

    (College of Arts and Science, China University of Petroleum-Beijing at Karamay, Karamay 834000, China)

  • Songqing Zhao

    (College of Arts and Science, China University of Petroleum-Beijing at Karamay, Karamay 834000, China)

  • Tianfang Yang

    (College of Arts and Science, China University of Petroleum-Beijing at Karamay, Karamay 834000, China)

Abstract

Power to gas (PTG) refers to the technology of converting power into energy-storage gas, which can absorb excess power when there is excess power and release energy-storage gas when needed. Based on the carbon dioxide (CO 2 ) emission of Karamay City in Northwest China, this study designed a process flow of the CO 2 absorption process, and the hydrogen and CO 2 methanation process, in PTG technology. The results show that the efficiency of the CO 2 absorption process was 91.5%, and the methanation efficiency was 77.5%. The heat recovery module was set during the process, and the total heat recovered was 17.85 MW. The cost of producing synthetic natural gas (SNG) in the PTG factory was 1782 USD/ton. In terms of cost, the cost of hydrogen production from electrolyzed water accounted for the largest proportion. In terms of product profit, the sale of pure oxygen was the largest part of the profit. At present, the carbon emission reduction index profit brought by SNG production accounted for a small proportion. In the future, with technological progress, industrial upgrading and the improvement in the carbon trading market, PTG technology is expected to become one of the ways to achieve carbon-emission-reduction targets.

Suggested Citation

  • Wenyin Jiang & Songqing Zhao & Tianfang Yang, 2022. "Economic and Technical Analysis of Power to Gas Factory Taking Karamay as an Example," Sustainability, MDPI, vol. 14(10), pages 1-15, May.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:10:p:5929-:d:815028
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    References listed on IDEAS

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    2. Guo, Liheng & Ding, Yudong & Liao, Qiang & Zhu, Xun & Wang, Hong, 2022. "A new heat supply strategy for CO2 capture process based on the heat recovery from turbine exhaust steam in a coal-fired power plant," Energy, Elsevier, vol. 239(PA).
    3. Sun, Liang & Chen, Wenying, 2017. "Development and application of a multi-stage CCUS source–sink matching model," Applied Energy, Elsevier, vol. 185(P2), pages 1424-1432.
    4. Buttler, Alexander & Spliethoff, Hartmut, 2018. "Current status of water electrolysis for energy storage, grid balancing and sector coupling via power-to-gas and power-to-liquids: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 2440-2454.
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    Cited by:

    1. Rishabh Agarwal, 2022. "Economic Analysis of Renewable Power-to-Gas in Norway," Sustainability, MDPI, vol. 14(24), pages 1-15, December.

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