Construction and technological progress of CCUS whole-process carbon reduction system in iron and steel industry
The development characteristics of carbon capture,utilization and storage(CCUS)technology in the iron and steel industry,the construction of the whole-process carbon reduction system and the technological progress are discussed.It describes the carbon emission characteristics of the iron and steel industry,the current status of carbon emission reduction technology development,and the development characteristics of CCUS technology.The iron and steel industry,as an important part of the heavy industry,has a large amount of carbon emission caused by the com-bustion of fossil fuels,such as coal,in the process of iron and steel production,and although the importance of CCUS has been increasing in recent years in our country,the whole process is still in the early stage of development,and further improvement of technology and policy support is needed.The"6C"system is constructed to create an integrated solution for the whole process of CCUS,detailing the technologies,strategies and application cases of the six links,including carbon capture,utilization,storage,verification,monitoring and assets,and how to achieve the goal of reducing carbon emissions through optimization,and at the same time providing valuable carbon emission con-trol experiences and references for other industrial sectors,control experience and reference.The progress of the application of CCUS technology in typical iron and steel scenarios in the iron and steel industry is analyzed,and three carbon emission reduction paths are proposed,the traditional blast furnace CCUS route carries out CO recycling and CO2 utilization through the source carbon capture and separation of part of the blast furnace gas,the direct carbon sequestration route in the end flue gas is proposed to reduce the purity of CO2 at the capture end based on the current problem of high energy consumption and cost of carbon capture,and the hydrogen-metallurgy-coupled CCUS route reduces the CO2 purity at the capture end by means of hydrogen metallurgy coupled with CCUS route through the combination of renewable energy hydrogen production and CCUS to obtain green methanol.The implementation of the three carbon emission reduction routes will promote the carbon reduction of traditional long processes,reduce the input of carbon sources,combine the utilization of carbon resources with the production process and realize the high value-added utilization of products,and the scaling up of the demonstration projects in the future will realize the inter-nal circulation of CO2 in the iron and steel industry and its cross-industry utilization,and put forward the suggestions and prospects for the promotion of the development of CCUS technology in the iron and steel industry.
iron and steel industrycarbon emission reductionCCUSwhole-processcarbon reduction system
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