Research on carbon dioxide capture and storage technology: a case study of Shaanxi Coal Group Yulin Chemical Co., Ltd.

The implementation of emission reduction and carbon reduction measures and the implementation of the “double carbon” goal are important transformation opportunity for coal chemical enterprises to move towards high-end,diversified and low-carbon development. Shaanxi Coal Industry Group Yulin Chemical planned a 4 million ton/year carbon dioxide capture, transportation and storage (CCS) demonstration project and carried out a 400000 ton/year pilot test project to help the country reach carbon peak and carbon neutrality. Based on the experience of Shenhua 100000 ton CCS demonstration project and CO₂ produced in the 1.8 million ton/year ethylene glycol project, two supercritical CO₂ storage processes, high purity (98.94%) and low purity (77.78%), are designed in this paper; Based on the understanding of Triassic and Permian salt water layers in the eastern Ordos Basin, three sets of geological salt water layers (Liujiagou Formation, Shiqianfeng Formation and Shihezi Formation) with good physical properties and great CO₂ storage potential were found.After in-depth evaluation and analysis of CO₂ storage layer cover and storage capacity, it is believed that the best storage environment for CO₂ in salt water layer over 1000 meters. By designing four injection and storage Wells and combining with the numerical simulation method, the storage operation mechanism of 400000 ton/year CO₂ is studied and analyzed, and it is theoretically feasible; It is designed to use PNX logging, downhole optical fiber sensing and surface InSAR monitoring methods to build an integrated monitoring and management platform for CO₂ from wellbore to reservoir and then to reservoir diffusion; From the perspective of CCS’s current economic and technological costs, industrial policy development, opportunities and challenges,the development of CCS in coal mining chemical industry has great potential.