CO 2 Capture Cost Reduction Potential of the Coal-Fired Power Plants under High Penetration of Renewable Power in China

Song He () and Yawen Zheng ()
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Song He: School of Ecology, Environment and Resources, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou 510006, China
Yawen Zheng: School of Ecology, Environment and Resources, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou 510006, China

Energies, 2024, vol. 17, issue 9, 1-15

Abstract: With a significant share of renewable power generation integrated into the power supply, it is crucial to timely adjust the regulating peak load for coal-fired power plants equipped with CO 2 capture to ensure the stable operation of the multi-energy supply system. In this paper, the effects of varying boiler loads on the techno-economic performance of the retrofitted power plant were studied. Furthermore, the potential for reducing the cost of CO 2 capture was investigated, and early opportunities for demonstration were discussed. Results showed that when the boiler load decreased from 100% turbine heat acceptance condition to 50% turbine heat acceptance condition, the cost of CO 2 capture increased from 37.0 $/t CO 2 to 57.0 $/t CO 2 , cost contribution of energy penalty and extra capital investment also increased from 20.6 $/t-CO 2 to 25.7 $/t-CO 2 , and from 16.4 $/t-CO 2 to 31.3 $/t-CO 2 , respectively. Furthermore, by improving separation efficiency from 0.15 to 0.5, a 25% to 30% reduction in CO 2 capture cost can be achieved. The cost of CO 2 capture could decrease by 42.2–50.5% when the cumulative capacity reaches 250 GW under the high investment learning rate scenario. According to the distribution of coal prices and renewable energy sources in China, the early demonstration projects of multi-energy supply systems should prioritize the northern region. The results of this work can provide informative references for making roadmaps and policies for CO 2 emission reduction toward carbon neutrality.

Keywords: renewable energy; CO 2 capture and storage; multi-energy supply system; cost reduction potential (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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