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首页> 外文期刊>Journal of Materials Research >Simulation and experimental study of spray pyrolysis of polydispersed droplets
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Simulation and experimental study of spray pyrolysis of polydispersed droplets

机译：多分散液滴喷雾热解的模拟与实验研究

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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.
机译：对喷雾热解过程中多分散液滴产生的颗粒（致密或中空）的尺寸分布和形态进行了实验和理论研究。选择从氧化锆羟基氯化物前体产生的氧化锆作为模型材料。我们小组先前开发的仿真方法[J.母校Res。，15，733（2000）]，其中液滴被认为是均匀的，已得到改进，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。针对许多离散的液滴尺寸分布类别，数值求解了溶剂蒸发的热量和质量传递以及液滴内部的溶质传质的联立方程。为了解释颗粒的致密化，在多分散液滴的蒸发阶段之后还包括了分解反应的作用。在空心粒子生成中，此模拟用于评估粒子壳的厚度。实验结果与仿真数据吻合良好，表明该模型提供了更现实的预测。

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