Research progress and prospects of large-scale full process CCUS technology in power plants
Coal-fired power plants are currently identified as a major source of industrial carbon emissions in China,while the proportion of carbon emissions from gas-fired power plants in thermal power plants is expected to increase in the future.In order to improve the carbon capture,utilization,and storage(CCUS)technology and to develop decarbonization industry under the carbon peaking and carbon neutrality goals,large-scale and efficient capture technology and the geological utilization and storage technology aspects for coal-fired power plants,as well as full flowsheet CCUS technology were focused on,and significant research advancements are cataloged systematically,while potential breakthrough directions for the large-scale full flowsheet CCUS technology of power plants are analyzed and forecasted.The following results are as follows,(1)The carbon capture technology for coal-fired power plants in China is rapidly developing.The absorption performance of low-concentration CO2 in coal flue gas has significantly improved,the efficiency of large-scale capture equipment continues to improve,and the coupling relationship between the power system and CO2 capture system has been emphasized.However,the technological bottlenecks remain prominent.Therefore,developing low-energy,low-consumption,low-cost absorbents,high-throughput and low-pressure drop tower internals,and ultra-large-scale-compact capture separation equipment,as well as optimizing control of large-scale carbon capture systems coupled with power systems,are urgent needs.(2)The theoretical research and engineering practice of CO2 geological utilization and storage technology has accumulated significant progress based on China's long-term accumulation of large-scale CO2 enhanced oil and gas recovery.However,theories and technologies for efficient CO2 geological utilization and storage in large basins with low-permeability reservoirs are still insufficient for the requirements of large-scale engineering deployment.There is an urgent need to construct the CO2 geological utilization and storage models,which integrates adaptability of multiple types of storage geological bodies in large basins,safe and efficient CO2 geological utilization and storage mechanisms,and an integrated-safe-efficient CO2 geological utilization and storage technology system.(3)The source-sink matching mechanism,technical adaptation mechanism,and system optimization mechanism are the three major key formation mechanisms of the large-scale full flowsheet CCUS technology for coal-fired power plants.The innovation and development are urgently needed in the integrated decarbonization technology model of CCUS,scientific basis and process methods for technical integration,and complex engineering multi-module integrated design,construction,and operation technology of the large-scale full flowsheet CCUS for coal-fired power plants.
Coal-fired power plantLarge-scale full flowsheet CCUS technologyCarbon captureGeological utilization and storageFull flowsheet mechanism
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