The Calcium Looping (CaL) process is a promising technology for post-combustion CO₂ capture from fossil-fired power plants and carbon intense industry. Within a CaL system, a limestone based sorbent stream is forced to circulation between two interconnected circulating fluidized bed (CFB) reactors. The main part of the CO₂, contained in the flue gas stream is absorbed by CaO within the carbonator, whereas it is released during regeneration in the oxy-fired calciner. The feasibility of this technology was proven by numerous experimental investigations in semi-industrial scale. The next step in the development of this technology is expected to be a demonstration plant in the scale of approximately 20 MW_th. The focus of this paper is the determination of the heat and mass balances and the assessment of the operability of a newly designed 20 MW_th CaL demonstration plant. The investigations are based on a steady-state process model, which has been validated by experimental data from 1 MW_th pilot tests. The aspect of solid entrainment during part load operation are addressed. In the present design case, a stable operation of the demonstration plant at 40 % equivalent carbonator load is feasible without additional flue gas recirculation.

钙循环（CaL）工艺是一种有前途的技术，用于从化石燃料发电厂和碳密集型工业中燃烧后捕集CO ₂。在CaL系统中，基于石灰石的吸附剂流被迫在两个相互连接的循环流化床（CFB）反应器之间循环。烟道气流中包含的CO ₂的主要部分在碳酸化器中被CaO吸收，而在氧气煅烧炉中的再生过程中会释放出来。半工业规模的大量实验研究证明了该技术的可行性。在这个技术发展的下一步预计将在大约20兆瓦的规模示范厂_日。本文的重点是热和质量平衡的决心和新设计的20兆瓦的可操作性的评估_届CAL示范工厂。调查是基于稳态过程模型，它已经从1个MW验证实验数据_个导频测试。解决了部分负荷运行过程中固体夹带的问题。在当前的设计案例中，在没有额外的烟气再循环的情况下，在40％当量的碳酸化器负荷下使示范工厂稳定运行是可行的。