Current status and development suggestions of CCUS technology in China under the "Double Carbon" strategy

Carbon Capture, Utilization and Storage (CCUS) is an effective way to reduce industrial CO₂ emission on large scale at present. The development status of key links of CCUS at home and abroad was analyzed systematically. Currently, the post-combustion CO₂ capture technology is relatively mature, the separation system of pre-combustion capture technology is complex, and the oxygen-enriched combustion technology with a high power consumption for producing oxygen, but it is required to reduce the cost of CO₂ capture and energy consumption for industrial applications. Although the technical strength has been achieved in China in terms of technology, safety and standard for CO₂ pipeline transportation, no project verification has been performed and no technical standards of CO₂ pipeline are available. In addition, the domestic CO₂ storage projects are relatively small in scale, and the requirements for industrial promotion in terms of reinjection scheme, ground process system and CO₂ leakage monitoring are not satisfied. Rich experience has been cumulated from the low CO₂ utilization in the development of oil and gas fields, chemical production and other areas. So, CO₂ storage cost should be reduced by improving the storage and utilization in the future. The research results can provide reference to the project demonstration and commercialized development of CCUS.