Abstract Chemical-looping combustion (CLC) is a next generation combustion technology that shows great promise as a solution for the need of high-efficiency low-cost carbon capture from fossil fueled power plants. In this paper, numerical simulations are conducted of a binary particle bed associated with a coal-direct CLC system consisting of coal (represented by plastic beads) and oxygen carrier particles and validated against an experimental riser-based carbon stripper. The detailed particle dynamics and solid-gas and solid-solid interactions are investigated using the Lagrangian particle-tracking approach known as the discrete element method coupled with the computational fluid dynamics solution for the flow field. The simulation results of the fluidization behavior and the separation ratio of the particles are in excellent agreement with the experiment. A credible simulation of a binary particle bed is of particular importance for understanding the details of the fluidization behavior; the baseline simulation established in this work can be used as a tool for designing and optimizing the performance of such systems.

中文翻译：

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用于化学循环燃烧的提升管碳汽提塔中二元颗粒床的计算流体动力学模拟

摘要 化学循环燃烧 (CLC) 是下一代燃烧技术，作为解决化石燃料发电厂高效低成本碳捕获的需求，显示出巨大的前景。在本文中，对与煤直接 CLC 系统相关的二元颗粒床进行了数值模拟，该系统由煤（由塑料珠表示）和氧载体颗粒组成，并针对基于实验立管的碳汽提塔进行了验证。使用称为离散元方法的拉格朗日粒子跟踪方法结合流场的计算流体动力学解决方案来研究详细的粒子动力学以及固-气和固-固相互作用。流化行为和颗粒分离率的模拟结果与实验吻合较好。二元颗粒床的可信模拟对于理解流化行为的细节特别重要；在这项工作中建立的基线模拟可用作设计和优化此类系统性能的工具。