Abstract In the present work, the multi-phase particle-in-cell (MP-PIC) method, implemented in OpenFOAM, is used to simulate a biomass-fueled chemical looping combustion (CLC) process in a circulation mode. Hydrodynamics of the gas-particle flow are analyzed, mainly, through pressure drop along the reactor, solid volume fraction distribution, the solid circulation between the two connected reactors, and gas and solid fuel leakages. Preliminary simulations agree well with the experimental data reported in the literature. Additional simulations using various fluidization rates into both the fuel and air reactors and different solid inventories are then performed. Results show the relevance of the pressure balance between the reactors to decreasing the gas leakage. Increasing the solid mass in the system has a favorable impact on preventing gas mixing but it allows solid fuel particles to leak to the air reactor. This is due to the increase of the solid circulation between the reactors, thus causing biomass particles' entrainment by the oxygen carrier particles. Simulation results also reveal the higher impact of the air reactor fluidization rate on the solid circulation, with respect to that of the fuel reactor fluidization rate.

中文翻译：

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生物质化学循环燃烧的数值模拟：流体动力学研究

摘要 在目前的工作中，在 OpenFOAM 中实施的多相颗粒胞内 (MP-PIC) 方法用于模拟循环模式下的生物质燃料化学循环燃烧 (CLC) 过程。主要通过沿反应器的压降、固体体积分数分布、两个相连反应器之间的固体循环以及气体和固体燃料泄漏来分析气体-颗粒流的流体动力学。初步模拟与文献中报道的实验数据非常吻合。然后使用各种流化率进入燃料和空气反应器以及不同的固体库存进行额外的模拟。结果表明反应器之间的压力平衡与减少气体泄漏的相关性。增加系统中的固体质量对防止气体混合有有利影响，但它会使固体燃料颗粒泄漏到空气反应器中。这是由于反应器之间的固体循环增加，从而导致生物质颗粒被氧载体颗粒夹带。模拟结果还揭示了空气反应器流化率对固体循环的影响比燃料反应器流化率的影响更大。