践行减排降碳措施，落实“双碳”目标是煤化工企业走向高端化、多元化、低碳型发展的重要转型契机。陕煤集团榆林化学有限责任公司谋划400万t/a二氧化碳捕集、运输及封存（CCS）示范项目及开展40万t/a先导试验项目助力国家碳达峰、碳中和。在借鉴神华10万t CCS示范项目经验基础上，依据已建180万t/a乙二醇项目中产生的CO₂，设计了高纯（98.94%）和低纯（77.78%）2种超临界CO₂封存流程；结合对鄂尔多斯盆地东部三叠系、二叠系咸水层的认识，找寻了3套物性较好且CO₂封存潜力巨大的地质咸水层（刘家沟组、石千峰组、石盒子组）；在深入CO₂储存层盖层及存储容量评估分析，认为CO₂在超过1 000 m的咸水层封存环境最佳；通过设计4口注入封存井并结合数值模拟方法对40万t/a CO₂的封存运行机制进行研究分析得出理论可行；设计采用PNX测井、井下光纤传感及地表InSAR等监测方法搭建起CO₂从井筒到储层再到储层扩散一体化的监测监控管理平台；从CCS当前经济技术成本、产业政策发展以及机遇挑战现状展望出煤化工开展CCS非常具有潜力。

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.