Simulation and experimental study of spray pyrolysis of polydispersed droplets
Simulation and experimental study of spray pyrolysis of polydispersed droplets
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DOI：
10.1557/jmr.2007.0235
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发表时间：
2007-07
影响因子：
2.7
通讯作者：
W. Widiyastuti;Wei-Ning Wang;I. Lenggoro;Ferry Iskandar;K. Okuyama
中科院分区：
文献类型：
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作者：
W. Widiyastuti;Wei-Ning Wang;I. Lenggoro;Ferry Iskandar;K. Okuyama
通过实验和理论研究了喷雾热解中多分散液滴产生的颗粒（致密或空心）的尺寸分布和形态。选择由羟基氯化氧锆前体产生的氧化锆作为模型材料。我们课题组之前开发的模拟方法[J. Mater.资源。 , 15, 733 (2000)]，其中假设液滴是均匀的，进行了改进以评估液滴中的多分散性对所得颗粒的尺寸和形态的影响。对于许多离散类别的液滴尺寸分布，对液滴内溶剂蒸发和溶质传质的传热传质联立方程进行了数值求解。在多分散液滴的蒸发阶段之后还包括分解反应的作用，试图解释颗粒的致密化。在中空粒子生成中，该模拟用于评估粒子壳的厚度。实验结果与模拟数据非常吻合，表明该模型提供了更真实的预测。
The size distribution and morphology of particles (dense or hollow) produced from polydispersed droplets in spray pyrolysis were studied both experimentally and theoretically. Zirconia, generated from a zirconyl hydroxychloride precursor, was selected as a model material. The simulation method that was previously developed by our group [ J. Mater. Res. , 15 , 733 (2000)], in which droplets were assumed to be uniform, was improved to evaluate the effect of polydispersity in droplets on the size and morphology of the resulting particles. Simultaneous equations for heat and mass transfer of solvent evaporation and solute mass transfer inside droplets were solved numerically for a number of discrete classes of droplet size distribution. The role of the decomposition reaction was also included after the evaporation stage of polydispersed droplets in an attempt to explain the densification of particles. In hollow particle generation, this simulation was used to evaluate the thickness of a particle shell. The experimental results were in good agreement with the simulation data, suggesting that the model provides a more realistic prediction.