Abstract:For an in-depth understanding of CCUS and its future development in China, the historical evolution, status and future trend of CCUS were explained from the three dimensions of time, space, and technology chain. In terms of time dimension, from 1950 to 2050, it can be divided into technology incubation phase (1950—1980), formative and development phase (1980—1995), R & D and demonstration phase (1995—2020), implementation phase (2020—2030) and commercialization phase (2030—2050). In terms of spatial dimension, countries in the leading position of CCUS technology are mainly distributed in North America and Europe, where the development time is relatively long and the overall R & D level is relatively high. In addition, Australia, Saudi Arabia, Brazil and China have also entered advanced ranks of CCUS. In terms of technology chain, CCUS technology can be divided into three generations. In the capture section, the first-generation capture technologies can be applied to the power plants; the second-generation capture technologies are oriented to power and industrial plants; the energy consumption, operating cost and maintenance cost of the third generation can be reduced to about 50% of the first generation. In the transportation section, the first-generation of CO₂ transport technology breaks through the lows of flow and diffusion, corrosion material control, leakage impact assessment, monitoring report and verification tools, etc.; the second generation focuses on the large-scale pipeline network development and standard formulation; the third generation can be applied to the large scale national and international pipe networks. In the storage section, the first generation prioritizes the development of common geological storage technologies; the second generation focuses on the safety monitoring and risk management and optimization; the third generation focuses on the complete monitoring and remedial measures. The overall level of CCUS in China is in the early stage of R & D and demonstration, and there is a certain gap between China and other leading countries. It is necessary to strengthen international cooperation and exchanges in the field of CCUS, introduce and learn CCUS core technologies and practical engineering experience, and prepare for the implementation of large-scale full-process CCUS projects in China in the future.