The scale of carbon dioxide resource utilization is still relatively small, and the development potential of the industry still needs to be released.

Carbon dioxide resource utilization is the process of utilizing captured carbon dioxide as a resource through engineering and technical means. It is one of the important ways to recover carbon dioxide and achieve “carbon neutrality”. It mainly includes biological utilization, geological utilization, mineralization utilization, chemical industry Utilize other methods.

From 2017 to 2021, with the increase in carbon dioxide utilization in fields such as carbon dioxide flooding, food and feed, and the increase in carbon dioxide consumption in mechanical processing, welding, steelmaking and other fields, China’s carbon dioxide consumption in the field of carbon dioxide resource utilization continues to grow. situation. However, compared with carbon dioxide emissions, the current domestic carbon dioxide resource utilization is still very small.

Judging from the development status of various subdivisions, in terms of chemical utilization of carbon dioxide, except for the production of urea, soda ash, baking soda, ammonium bicarbonate fertilizer, salicylic acid and other chemical products, the current technical level of chemical utilization of carbon dioxide in my country is generally in the middle. In the pilot stage, demonstration research on technologies such as reforming to prepare syngas, synthesis of degradable polymers, and synthesis of organic carbonates has been completed, while technologies such as synthesis of methanol, synthetic polymer polyols, and mineralization utilization have entered the pilot stage.

According to the “China’s Carbon Dioxide Resource Utilization Market Feasibility Research Report 2022-2026” released by the Industrial Research Center, the carbon dioxide flooding In terms of oil, PetroChina has built China’s first full industry chain base for carbon dioxide separation, capture and oil displacement in Jilin Oilfield. As of the end of 2021, the cumulative gas injection has exceeded 2.25 million tons; Sinopec has used 310,000 tons of carbon dioxide for oil displacement in 2021. .

In terms of carbon dioxide bioutilization, current carbon dioxide bioutilization technology mainly focuses on the immobilization of microalgae. Among them, Guodian Penglai Coal-fired Power Plant has established a 100,000-square-meter flue gas microalgae breeding base to realize an industrial engineering demonstration of microalgae capture and utilization of flue gas CO2 to produce biodiesel. In addition, the Antai Enyi Microalgae Culture Carbon Sequestration Demonstration Project Phase I officially started construction in April 2021, and will undergo trial production in early May 2022. It has now been officially put into production. The project will be completed in 2020 after reaching production and achieving results. More than 130 tons of algae powder was produced and more than 1,000 tons of carbon dioxide emissions were reduced.

In terms of carbon dioxide mineralization and utilization, relevant researchers have currently developed various carbon dioxide mineralization and utilization technologies, such as using carbide slag to mineralize carbon dioxide to prepare nano-calcium carbonate, etc. At the same time, domestic carbon dioxide mineralization utilization experiments have begun. For example, the Institute of Process Engineering of the Chinese Academy of Sciences has launched a 50,000 tons/year steel slag mineralization industry verification project in Dazhou, Sichuan; Sichuan University has teamed up with Sinopec and other companies to directly mineralize low-concentration tail gas CO2. Good progress has been made in the research and development of phosphogypsum co-production of sulfur-based compound fertilizer technology.

Industrial analysts said that China has mastered a large number of technologies related to the utilization of carbon dioxide resources, and there are more and more companies Invest in the construction of carbon dioxide resource utilization projects, but due to technical factors and other restrictions, the current cost of carbon dioxide resource utilization is relatively high, making it difficult to meet market requirements for product prices. Therefore, my country’s carbon dioxide resource utilization industry still has a long way to go in terms of technological innovation and cost control in the future.