喷雾热解制备氧化铈过程的数值模拟  

Numerical simulation of process of preparing cerium oxide by spray pyrolysis

作　　者：吕超 张录录 周佟 张廷安 吕国志 LÜChao;ZHANG Lulu;ZHOU Tong;ZHANG Ting'an;LÜGuozhi(Key Laboratory of Vibration and Control of Aviation Power Equipment,Ministry of Education,Northeastern University,Shenyang 110819,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学航空动力装备振动及控制教育部重点实验室,沈阳110819 [2]东北大学冶金学院,沈阳110819

出　　处：《中国有色金属学报》2025年第1期209-221,共13页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51904069)。

摘　　要：喷雾热解技术具有工艺简单、成本低、生产效率高等诸多优点,已广泛应用在催化剂材料、薄膜材料制备以及超细粉体制备等领域。本文采用DPM-ED模型模拟喷雾热解法制备氧化铈(CeO_(2)),考察了不同热解温度(550、650、750和850℃)对产物CeO_(2)分布、喷雾贯穿距以及液滴直径的影响,还考察了不同气速(1.0、1.2、1.4和1.6 m/s)对产物CeO_(2)分布以及温度场的影响。结果表明:温度越高,产物CeO_(2)质量分数越大,喷雾贯穿距越小,液滴直径减小得越快;不同气速导致产物颗粒在反应器内滞留或沉积量不同,同时流场内温度梯度分布很不均匀。模拟结果可为今后喷雾热解制备CeO_(2)工艺的改进和优化提供理论依据。Spray pyrolysis has advantages such simple process,low cost and high production efficiency,which make it widely applicable in the preparation of catalyst materials,thin films and ultrafine powders.In this study,the DPM-ED model was used to simulate the spray pyrolysis process for synthesizing cerium oxide(CeO_(2)).The effects of different temperatures(550,650,750 and 850℃)on CeO_(2) distribution,spray penetration distance and droplet size were investigated.Additionally,the effects of various gas velocities(1.0,1.2,1.4 and 1.6 m/s)on CeO_(2) distribution and temperature fields were also analyzed.The results indicate that the higher temperatures lead to increased mass fractions of CeO_(2),shorter spray penetration distances,and faster reductions in droplet size.The different gas velocities result in varying levels of particle retention and deposition within the reactor,alongside a significant gradient in temperature distribution within the flow field.These simulation results provide a theoretical basis for future optimization and improvement of the spray pyrolysis process in cerium oxide production.

关 键 词：喷雾热解 液滴群 氧化铈 离散相 数值模拟 

分 类 号：TQ133.3[化学工程—无机化工]