Biomass energy conversion with carbon capture and storage (BECCS) can lead to the net removal of CO₂ from the atmosphere. Calcium looping (CaL) is a promising carbon capture process for existing or greenfield capture-ready biomass-fired plants. This paper investigates the technical and economic performance of BECCS using CaL systems as a retrofit to Brazilian cogeneration plants fuelled with sugarcane bagasse. Bagasse-fired cogeneration plants integrated with CaL were compared with their correspondent base plant without CO₂ capture and with chemical absorption using Cansolv solvent, the current benchmark for post-combustion CO₂ capture. Key parameters such as CO₂ removal potential, water use, added plant footprint, and levelized energy cost (LCOE) were analyzed. Although the Bio-CaL alternative is not cost-effective compared to Cansolv for a first of a kind plant, the assessed system presents competitive advantages in operational flexibility, energy efficiency, and electricity surplus in comparison with the chemical absorption route. For future plants, economic results are promising and can match those of more conventional technologies. Therefore, investments in pilot size biomass-fired CaL units should be stimulated to promote learning and allow the implementation of large-scale plants that would likely operate with similar costs but greater flexibility and thermal efficiency than the current more mature CO₂ capture technologies.

带有碳捕获和储存 (BECCS) 的生物质能转换可导致从大气中净去除 CO ₂。钙循环 (CaL) 是一种有前景的碳捕获过程，可用于现有或准备绿地捕获的生物质燃烧植物。本文研究了使用 CaL 系统对以甘蔗渣为燃料的巴西热电厂进行改造的 BECCS 的技术和经济性能。将与 CaL 集成的燃烧甘蔗渣的热电联产厂与其对应的没有 CO ₂捕获和使用 Cansolv 溶剂进行化学吸收的基础工厂进行了比较，Cansolv 溶剂是当前燃烧后 CO ₂捕获的基准。CO ₂等关键参数分析了去除潜力、用水量、增加的工厂足迹和平准化能源成本 (LCOE)。尽管与 Cansolv 相比，Bio-CaL 替代方案在同类工厂中的成本效益不高，但与化学吸收路线相比，所评估的系统在操作灵活性、能源效率和电力盈余方面具有竞争优势。对于未来的工厂，经济成果是有希望的，可以与更传统的技术相媲美。因此，应该刺激对中试规模的生物质燃烧 CaL 装置的投资，以促进学习并允许实施大型工厂，这些工厂可能以类似的成本运行，但比目前更成熟的 CO ₂捕获技术具有更大的灵活性和热效率。