A numerical study on biomass fast pyrolysis process: A comparison between full lumped modeling and hybrid modeling combined with CFD
A numerical study on biomass fast pyrolysis process: A comparison between full lumped modeling and hybrid modeling combined with CFD
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DOI：
10.1016/j.compchemeng.2015.07.007
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发表时间：
2015-11
期刊：
影响因子：
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通讯作者：
Yu Ri Lee;H. Choi;H. Park;J. E. Lee
中科院分区：
文献类型：
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作者：
Yu Ri Lee;H. Choi;H. Park;J. E. Lee
本研究的重点是生物质快速热解系统的过程建模和仿真。针对生物质快速热解过程的模拟，建立了集总模型和混合模型两种模拟模型。利用上述模型，分析了反应温度对反应速率和最终产物收率的影响。结果表明，混合模型具有显示流化床内多相反应流动的特点。混合模型的这种行为可以归因于混合模型和集总模型的产品产量差异。对于焦油和NCG的产率，混合模型的预测结果比集总模型的预测结果更符合实验结果。而对于炭产率，集总模型和混合模型的计算结果与实验结果接近。
This study focuses on process modeling and simulation of a biomass fast pyrolysis system. For the simulation of the biomass fast pyrolysis process, two types of simulation models were developed: lumped model and hybrid model. Employing the above models, the effect of reaction temperature on reaction rate and final product yields were analyzed. It was found that the hybrid model exhibited a peculiar characteristic of displaying multiphase reacting flow occurring in fluidized bed. This behavior of hybrid model could have attributed for the difference in product yields of the models (hybrid and lumped). For the yields of the tar and NCG, hybrid model prediction was very consistent with the experimental results than the lumped model. However, for char yield, the results of both the lumped model and the hybrid model were close to that of experimental results.