Homsy Sally L, Moreno Joseba, Dikhtiarenko Alla, Gascon Jorge, Dibble Robert W
Clean Combustion Research Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
Institute of Combustion and Power Plant Technology (IFK), University of Stuttgart, Pfaffenwaldring 23, Stuttgart 70569, Germany.
ACS Omega. 2020 Dec 7;5(50):32318-32333. doi: 10.1021/acsomega.0c04157. eCollection 2020 Dec 22.
The CO capture performance of sorbents derived from three distinct limestones, including a metamorphosed limestone, is studied under conditions relevant for calcium looping CO capture from power plant flue gas. The combined and individual influence of flue gas HO and SO content, the influence of textural changes caused by sequential calcination/carbonation cycles, and the impact of CaSO accumulation on the sorbents' capture performance were examined using bubbling fluidized bed reactor systems. The metamorphosed limestone-derived sorbents exhibit atypical capture behavior: flue gas HO negatively influences CO capture performance, while limited sulfation can positively influence CO capture, with space time significantly impacting CO and SO co-capture performance. The morphological characteristics influencing sorbents' capture behavior were examined using imaging and material characterization tools, and a detailed discussion is presented. This insight into the morphology responsible for metamorphosed limestone-derived sorbent's anomalous capture behavior can guide future sorbent selection and design efforts.
研究了源自三种不同石灰石（包括变质石灰石）的吸附剂在与从电厂烟气中进行钙循环CO捕集相关的条件下的CO捕集性能。使用鼓泡流化床反应器系统研究了烟气中H₂O和SO₂含量的综合及单独影响、连续煅烧/碳酸化循环引起的结构变化的影响以及CaSO₄积累对吸附剂捕集性能的影响。源自变质石灰石的吸附剂表现出非典型的捕集行为：烟气中的H₂O对CO捕集性能有负面影响，而有限的硫酸化对CO捕集有积极影响，时空对CO和SO₂的共捕集性能有显著影响。使用成像和材料表征工具研究了影响吸附剂捕集行为的形态特征，并进行了详细讨论。对导致源自变质石灰石的吸附剂异常捕集行为的形态的这种洞察可以指导未来吸附剂的选择和设计工作。
