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首页> 外文期刊>Advanced Powder Technology: The internation Journal of the Society of Powder Technology, Japan >Numerical simulation of gas-solid flows in fluidized bed gasification reactor
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Numerical simulation of gas-solid flows in fluidized bed gasification reactor

机译：流化床气化反应器中气固流量的数值模拟

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A numerical model for simulating a fluidized bed gasifier should include appropriate parameters to capture the dynamics of gas-solid flows, gasification kinetics and the interaction between these two. The focus of the present study is to analyze the effects of coal gasification chemistry models reported in literature on the prediction of product gas composition in a fluidized bed gasification reactor. Numerical results are validated against the experimental data available in literature. The validated model is used to examine the available chemical kinetics schemes for water gas shift reaction, steam methane reforming reaction and char heterogeneous reactions. It is also used to assess the effects of hydrodynamic models parameters such as drag model, particle-particle restitution coefficient and specularity coefficient on exit gas composition. Results show that the predictions of product gas composition are notably affected by the choices of the kinetics schemes for water gas shift and steam methane reforming reactions. Systematic analysis using the available choices to simulate initial processes such as moisture removal, volatile and tar cracking is reported. Drag models and the value of specularity coefficient are shown to have no effect on product gas composition, and the particle-particle restitution coefficient slightly influences the predicted gas composition. (C) 2019 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
机译：模拟流化床气化器的数值模型应包括适当的参数，以捕获气体固体流动，气化动力学和这两个之间的相互作用的动态。本研究的重点是分析文献中报告的煤气化化学模型对流化床气化反应器中产品气体组合物的预测的影响。根据文献中提供的实验数据验证了数值结果。验证的模型用于检查水煤气变换反应，蒸汽甲烷重整反应和炭异质反应的可用化学动力学方案。它还用于评估流体动力学模型参数，例如拖曳模型，粒子恢复系数和镜面系数在出口气体组合物上的影响。结果表明，产品气体组合物的预测尤其受水煤气变换和蒸汽甲烷重整反应的动力学方案的选择的影响。报道了使用可用选择来模拟初始方法的系统分析，例如水分去除，挥发性和焦油裂解。拖曳模型和镜面系数的值显示对产物气体组合物没有影响，颗粒粒子恢复系数略微影响预测的气体组合物。 （c）2019年日本粉末技术学会。由elsevier b.v发表。和日本粉末科技会。版权所有。

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