当前位置：
X-MOL 学术
›
Ind. Eng. Chem. Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Multiphysics Modeling for Microwave Freeze-Drying of Initially Porous Frozen Material Assisted by Wave-Absorptive Medium
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-10-23 , DOI: 10.1021/acs.iecr.0c03852 Wei Wang 1 , Shuo Zhang 1 , Yanqiu Pan 2 , Jing Yang 1 , Yujia Tang 1 , Guohua Chen 3
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-10-23 , DOI: 10.1021/acs.iecr.0c03852 Wei Wang 1 , Shuo Zhang 1 , Yanqiu Pan 2 , Jing Yang 1 , Yujia Tang 1 , Guohua Chen 3
Affiliation
|
To investigate the enhanced impact of initially porous frozen material and wave-absorptive medium-assisted microwave heating on traditional freeze-drying, a multiphysics model coupling temperature, concentration, and electric fields was formulated and numerically solved, and microwave freeze-drying experiments of aqueous mannitol solution were conducted with silicon carbide as the wave-absorptive medium. The results demonstrated that the use of porous frozen material and wave-absorptive medium could dramatically enhance the microwave freeze-drying process. Under 30 °C and 22 Pa of the tested conditions, the microwave freeze-drying time spent for the initially porous sample can be 18 and 30%, respectively, shorter than traditional freeze-drying times for porous and solid samples. Excellent accordance was achieved between simulated and measured drying curves. Based on the profiles of temperature, saturation, and electrical field strength, mechanisms of mass and heat transfer, as well as propagation and dissipation of electromagnetic wave within a sample, were analyzed during drying. There were similar quantities of cumulatively absorbed energy for traditional freeze-drying of solid and porous samples and microwave freeze-drying of porous samples. Theoretical and experimental results indicated that the proposed method can significantly increase the freeze-drying rate and improve the process economy.
中文翻译：
吸波介质辅助的多孔初冻材料微波冷冻干燥的多物理场建模
为了研究最初的多孔冷冻材料和波吸收介质辅助微波加热对传统冷冻干燥的增强影响，建立了一个耦合温度，浓度和电场的多物理场模型，并对其进行了数值求解，并对水溶液进行了微波冷冻干燥实验。甘露醇溶液是用碳化硅作为吸波介质进行的。结果表明，使用多孔冷冻材料和吸波介质可以显着增强微波冷冻干燥过程。在30°C和22 Pa的测试条件下，最初用于多孔样品的微波冷冻干燥时间分别为18％和30％，比传统的多孔和固体样品的冷冻干燥时间短。在模拟和测量的干燥曲线之间实现了极好的一致性。根据温度，饱和度和电场强度的曲线，分析了干燥过程中质量和热传递的机理以及样品中电磁波的传播和耗散。对于固体和多孔样品的传统冷冻干燥以及多孔样品的微波冷冻干燥，累积的吸收能量的数量相近。理论和实验结果表明，该方法可以显着提高冷冻干燥速度，提高工艺经济性。在干燥过程中进行了分析。对于固体和多孔样品的传统冷冻干燥以及多孔样品的微波冷冻干燥，累积的吸收能量的数量相近。理论和实验结果表明，该方法可以显着提高冷冻干燥速度，提高工艺经济性。在干燥过程中进行了分析。对于固体和多孔样品的传统冷冻干燥以及多孔样品的微波冷冻干燥，累积的吸收能量的数量相近。理论和实验结果表明，该方法可以显着提高冷冻干燥速度，提高工艺经济性。
更新日期：2020-11-25
中文翻译：
吸波介质辅助的多孔初冻材料微波冷冻干燥的多物理场建模
为了研究最初的多孔冷冻材料和波吸收介质辅助微波加热对传统冷冻干燥的增强影响，建立了一个耦合温度，浓度和电场的多物理场模型，并对其进行了数值求解，并对水溶液进行了微波冷冻干燥实验。甘露醇溶液是用碳化硅作为吸波介质进行的。结果表明，使用多孔冷冻材料和吸波介质可以显着增强微波冷冻干燥过程。在30°C和22 Pa的测试条件下，最初用于多孔样品的微波冷冻干燥时间分别为18％和30％，比传统的多孔和固体样品的冷冻干燥时间短。在模拟和测量的干燥曲线之间实现了极好的一致性。根据温度，饱和度和电场强度的曲线，分析了干燥过程中质量和热传递的机理以及样品中电磁波的传播和耗散。对于固体和多孔样品的传统冷冻干燥以及多孔样品的微波冷冻干燥，累积的吸收能量的数量相近。理论和实验结果表明，该方法可以显着提高冷冻干燥速度，提高工艺经济性。在干燥过程中进行了分析。对于固体和多孔样品的传统冷冻干燥以及多孔样品的微波冷冻干燥，累积的吸收能量的数量相近。理论和实验结果表明，该方法可以显着提高冷冻干燥速度，提高工艺经济性。在干燥过程中进行了分析。对于固体和多孔样品的传统冷冻干燥以及多孔样品的微波冷冻干燥，累积的吸收能量的数量相近。理论和实验结果表明，该方法可以显着提高冷冻干燥速度，提高工艺经济性。
京公网安备 11010802027423号