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Power to gas: an option for 2060 high penetration rate of renewable energy scenario of China

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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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Data availability

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.

Funding

The authors gratefully acknowledge the financial support of the Natural Science Foundation of Beijing (Grant No. 9212017).

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Authors and Affiliations

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Contributions

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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Correspondence to Xingping Zhang.

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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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