Abstract
Replacing conventional fossil fuel power plants with large-scale renewable energy sources (RES) is a crucial aspect of the decarbonization of the power sector and represents a key part of the carbon-neutral strategy of China. The high penetration rate of renewable energy in the electricity system, however, implies the challenges of dealing with the intermittency and fluctuation of RES. Power to gas (P2G), which can convert surplus renewable power into a chemical form of energy (i.e., synthetic gas), can help handle this challenge and supply new energy carriers for various energy sectors. By modeling three potential 2060 energy mix scenarios in China, this paper aims to describe the possible contribution of the high penetration rate of renewable energy combined with P2G in the future sustainable energy system. Different schemes are listed and compared, and the results are used in a basic economic evaluation of the synthetic gas production cost for the P2G plants. Ideally, nearly 18 million tons of carbon dioxide would be recycled and transformed into methane (around 9.37 km3) annually in China. Considering a zero price for the excess renewable power and future costs of the components, the levelized cost of energy (LCOE) of the final production of methane is estimated at 0.86 $/m3SNG.
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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The authors would like to thank the anonymous referees and the editor of this journal. The authors also gratefully acknowledge the financial support of the Natural Science Foundation of Beijing (Grant No. 9212017). The first author also would like to thank the financial support of the Double First-class Universities Postgraduate Training Project of North China Electric Power University.
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The authors gratefully acknowledge the financial support of the Natural Science Foundation of Beijing (Grant No. 9212017).
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Youzhong Zhang: Conceptualization, methodology, and writing—original draft preparation and reviewing.
Xingping Zhang: Supervision and writing—reviewing and editing.
Sida Feng: Writing—original draft preparation and reviewing.
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Appendix
Appendix
Nomenclature | |||
---|---|---|---|
RES | Renewable energy sources | AEL | Alkaline electrolysis |
P2G | Power-to-gas | PEMEL | Proton exchange membrane electrolysis |
LCOE | Levelized cost of energy | SOEL | Solid oxide electrolysis |
GHG | Greenhouse gases | GE | General Electric Co. |
CO2 | Carbon dioxide | CEC | China Electricity Council |
IEA | The International Energy Agency | NEA | National Energy Administration |
P2H | Power to hydrogen | SNG | Syngas |
P2X | Power to other energy sources | GDP | Gross domestic product |
P2L | Power to liquid | DAC | Direct air capture |
P2C | Power to chemicals | CAPEX | Capital expenditures |
CCS | Carbon capture schemes | O&M | Operation and maintenance costs |
GEIDCO | The Global Energy Internet Development Cooperation Organization | OECD | Organization for Economic Cooperation and Development |
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Zhang, Y., Zhang, X. & Feng, S. Power to gas: an option for 2060 high penetration rate of renewable energy scenario of China. Environ Sci Pollut Res 29, 6857–6870 (2022). https://doi.org/10.1007/s11356-021-16137-x
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DOI: https://doi.org/10.1007/s11356-021-16137-x