Modeling the thermochemical degradation of biomass inside a fast pyrolysis fluidized bed reactor
Modeling the thermochemical degradation of biomass inside a fast pyrolysis fluidized bed reactor
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DOI：
10.1002/aic.13705
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发表时间：
2012-10-01
期刊：
影响因子：
3.7
通讯作者：
Brown, R. C.
中科院分区：
文献类型：
--
作者：
Bruchmueller, J.;van Wachem, B. G. M.;Brown, R. C.
利用欧拉/拉格朗日联合模拟方法，对鼓泡流化床中的快速热解过程进行了建模、彻底再现和仔细研究。将三维模型与100 g/h鼓泡流化床热解装置的实验结果进行比较，包括出口颗粒组成和气体/蒸汽/水产量等变量（流化条件、生物质水分浓度和床层温度的函数）。在高端计算机上进行了多处理器模拟，以跟踪80万个独立的沙子和生物质颗粒，从而可以在整个颗粒生命周期内查看准确而详细的多尺度信息（即任何所需的颗粒属性，轨迹，颗粒相互作用）。生物质的整体热化学降解过程受到局部流动和颗粒特性的影响，因此，准确和详细的建模揭示了对此类复杂过程的前所未有的深入了解。研究发现，表面流化速度对最终的生物油收率有重要影响，而颗粒含水量对最终的生物油收率影响较小。(c) 2011化学工程学报，58:30303042,2012
A fast pyrolysis process in a bubbling fluidized bed has been modeled, thoroughly reproduced and scrutinized with the help of a combined Eulerian/Lagrangian simulation method. The 3-D model is compared to experimental results from a 100 g/h bubbling fluidized bed pyrolyzer including such variables as particle composition at the outlet and gas/vapor/water yields as a function of fluidization conditions, biomass moisture concentrations, and bed temperatures. Multiprocessor simulations on a high-end computer have been carried out to enable the tracking of each of the 0.8 million individual discrete sand and biomass particles, making it possible to look at accurate and detailed multiscale information (i.e., any desired particle property, trajectory, particle interaction) over the entire particle life time. The overall thermochemical degradation process of biomass is influenced by local flow and particle properties and, therefore, accurate and detailed modeling reveals unprecedented insight into such complex processes. It has been found, that the superficial fluidization velocity is important while the particle moisture content is less significant for the final bio-oil yield. (c) 2011 American Institute of Chemical Engineers AIChE J, 58: 30303042, 2012