Adaptive pore network modelling of thermochemical processes in single porous particles (B04)

单个多孔颗粒热化学过程的自适应孔隙网络建模 (B04)

• 批准号: 447186528
• 金额: --
• 依托单位: Lehrstuhl für Thermische Verfahrenstechnik
• 依托单位国家: 德国
• 项目类别: CRC/Transregios
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/447186528?language=en
• 关键词: Adaptive; pore; network; modelling; thermochemical

B4 investigates the reactive transport phenomena at the scale of a single particle and under realistic process conditions. The void space within a single particle will be approximated by a network of pores with size distribution that will vary over time due to shrinkage during drying or consumption of solid phase during chemical reactions. To validate the adaptive pore network models, drying measurements (with silica gel and wood particles) as well as calcination experiments (with magnesite particles) will be carried out in thermo-balance reactors. The measured mass loss kinetic data will be exploited to assess the prediction quality of new pore network models. The transport and reaction parameters of existing macroscopic continuum models for thermochemical conversions of a single particle will be computed from volume-averaged data obtained from microscopic pore network simulations.

B4研究了在单个颗粒尺度和实际工艺条件下的反应传输现象。单个颗粒内的空隙空间将近似为具有尺寸分布的孔的网络，该尺寸分布将由于干燥期间的收缩或化学反应期间固相的消耗而随时间变化。为了验证自适应孔隙网络模型，将在热平衡反应器中进行干燥测量（硅胶和木材颗粒）以及煅烧实验（菱镁矿颗粒）。将利用测得的质量损失动力学数据来评估新孔隙网络模型的预测质量。现有的宏观连续模型的单个粒子的热化学转化的传输和反应参数将计算从微观孔隙网络模拟获得的体积平均数据。