Wei Ning, Liu Sheng-Nan, Wei Feng, Li Xiao-Chun
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China.
National Science Library(Wuhan), Chinese Academy of Sciences, Wuhan 430071, China.
Huan Jing Ke Xue. 2023 Dec 8;44(12):6621-6629. doi: 10.13227/j.hjkx.202210287.
The cement industry faces great pressure from the targets of carbon peak and carbon neutrality. COcapture, geological utilization, and storage(CCUS) technology is crucial for CO mitigation in large-scale fossil-based industries. An integrated techno-economic assessment model of CCUS was improved here to assess the potential of CCUS retrofits in the cement industry in China, and the cost curve or supply curve of CCUS in the cement industry was obtained. The model set up ten scenarios from four aspects:source-sink matching distance, capture rate, CCUS technology, and technical level. The cement enterprise screening, site screening, techno-economic evaluation, and source-sink matching of CCUS were completed to answer some key problems in realizing low-carbon development via CCUS, such as enterprise inventory, storage site, emission reduction scale, and cost range. Under the scenario of 250 km matching distance, 85% net capture rate, CO-enhanced water recovery technology, and current technical level, 44% of cement enterprises reduced carbon emission via CCUS, the cumulative capacity reached 625 million tons per year, and the levelized cost was 290-1838 yuan·t. The projects with a levelized cost of fewer than 600 yuan·t accounted for 77% and could reduce CO emission by 564 million tons annually. The projects whose levelized cost was less than 400 yuan·t could reduce CO by 199 million tons per year. When the coupling of CO-enhanced oil recovery and CO-enhanced water recovery technology was considered, the levelized cost was 27% lower. When the cement capacity was less than 530 million tons per year, the additional cost of cement production was 95-300 yuan·t. Under technological progress to 2030, the levelized cost will be reduced by 9%-15%. The regions with early demonstration advantages of full-chain CO-enhanced water recovery technology were Xinjiang, Inner Mongolia, Ningxia, Henan, and Hebei. Additionally, the areas suitable for cement CCUS cluster included Ordos Basin, Junggar Basin, Bohai Bay Basin, and Songliao Basin. It is technically feasible for the cement industry to deploy full-chain CCUS projects, and low-cost projects have an early demonstration opportunity. These results can provide a quantitative reference for the low-carbon development of the cement industry and the commercial deployment of CCUS in cement production.
水泥行业面临着来自碳达峰和碳中和目标的巨大压力。二氧化碳捕集、地质利用与封存（CCUS）技术对于大规模化石基产业的二氧化碳减排至关重要。在此改进了一个CCUS综合技术经济评估模型，以评估中国水泥行业CCUS改造的潜力，并得出了水泥行业CCUS的成本曲线或供应曲线。该模型从源汇匹配距离、捕集率、CCUS技术和技术水平四个方面设置了十种情景。完成了水泥企业筛选、场地筛选、技术经济评估以及CCUS的源汇匹配，以回答通过CCUS实现低碳发展中的一些关键问题，如企业清单、储存场地、减排规模和成本范围等。在匹配距离250公里、净捕集率85%、二氧化碳强化水回收技术以及当前技术水平的情景下，44%的水泥企业通过CCUS实现了碳排放减少，累计能力达到每年6.25亿吨，平准化成本为290 - 1838元/吨。平准化成本低于600元/吨的项目占77%，每年可减少二氧化碳排放5.64亿吨。平准化成本低于400元/吨的项目每年可减少二氧化碳排放1.99亿吨。当考虑二氧化碳强化油回收与二氧化碳强化水回收技术耦合时，平准化成本降低27%。当水泥产能低于每年5.3亿吨时，水泥生产的额外成本为95 - 300元/吨。到2030年技术进步时，平准化成本将降低9% - 15%。全链条二氧化碳强化水回收技术具有早期示范优势的地区为新疆、内蒙古、宁夏、河南和河北。此外，适合水泥CCUS集群的地区包括鄂尔多斯盆地、准噶尔盆地、渤海湾盆地和松辽盆地。水泥行业部署全链条CCUS项目在技术上是可行的，低成本项目具有早期示范机会。这些结果可为水泥行业的低碳发展以及CCUS在水泥生产中的商业部署提供定量参考。
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