The optimal layout of CCUS clusters in China’s coal-fired power plants towards carbon neutrality

doi:10.12006/j.issn.1673-1719.2021.258

Abstract

Abstract:

As the largest carbon dioxide (CO₂) emission source in China, decarbonization of coal-fired power plants (CFPPs) is crucial for China to achieve carbon neutrality before 2060. Carbon capture utilization and storage (CCUS) is currently the only technology choice to realize deep cut in CO₂ emissions from CFPPs. The Integrated Environmental Control Model (IECM) is applied to calculate the cost and CO₂ capture of the selected CFPPs with CCUS. Based on the distribution patterns and potential of CO₂ storage sites, an optimal source-sink matching assessment model is applied to evaluate the priority CCUS layout scheme under the carbon neutrality target. In order to optimize infrastructure construction and reduce costs through economies of scale, the cluster analysis is applied to identify the CCUS cluster-hub. Then, the improved minimum spanning tree method is used to obtain the optimization strategy of CO₂ transport pipeline networks for above CCUS cluster-hub projects. To achieve carbon neutrality goal of the power sector, 300 existing CFPPs with an installed capacity of approximately 355 GW are required to be retrofitted by CCUS. The cumulative CO₂ emissions reduction potential of these CFPPs with CCUS is 19 Gt. By the development of industrial hubs with shared CO₂ transport and storage infrastructures, the total pipeline length and the total CO₂ transport cost could be reduced largely. The CCUS clusters of CFPPs are mainly distributed in Central, North and Northwest China and matched with the Songliao Basin, Bohai Bay Basin, Subei Basin and Ordos Basin which are considered as the priority areas for the implementation of the CCUS projects.

Key words: Carbon capture utilization and storage (CCUS), Optimal source-sink matching, CCUS clusters, Optimal layout

CHEN Wen-Hui, LU Xi. The optimal layout of CCUS clusters in China’s coal-fired power plants towards carbon neutrality[J]. Climate Change Research, 2022, 18(3): 261-271.

Figures/Tables 6

Fig. 1 CO2 captured cost and spatial distribution of running coal-fired power plants above 300 MW with CCUS

Fig. 2 The distribution of selected coal-fired power plants with CO2 capture in power grids in different time periods

Fig. 3 Length and transportation volume of point-to-point CO2 pipeline during 2030-2050

Fig. 4 The deployment path of CO2 pipeline network for captured CO2 transport during 2030-2035

Fig. 5 The deployment path of CO2 pipeline network for captured CO2 transport during 2035-2040

Fig. 6 The deployment path of CO2 pipeline network for captured CO2 transport during 2040-2045

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