Zhuang Shujuan, Han Ning, Zou Qingchuan, Zhang Shuguang, Song Feng
School of Chemical Engineering, Shandong University of Technology, Zibo 255049, China.
Department of Materials Engineering, KU Leuven, 3001 Leuven, Belgium.
Membranes (Basel). 2020 Jul 25;10(8):164. doi: 10.3390/membranes10080164.
A dynamic model based on BaCeYO (BCY10) perovskite membrane for steam permeation process is presented here to essentially investigate the internal mechanism. The transient concentration distribution and flux of the charged species and the electric potential distribution within the membrane on the steam permeation process are analyzed in detail via simulation based on this model. The results indicate that the flux of steam can be improved via elevating operating temperatures, enlarging the difference of the partial steam pressure between two sides of the membrane, increasing the membrane density, and reducing the membrane thickness. Moreover, it was found that the polarization electric potential between both sides of the membrane occurs during the steam permeation process, especially at the steady state of the steam permeation process. The polarization electric potential reaches the maximum value at about 1050 K in this membrane. The evolution of electric potential can explain the influence of the above-mentioned factors on the steam permeation process. This study advances the mechanism of steam permeation through perovskite membrane, which provides a new strategy for the fundamental investigation of related species permeation (oxygen, carbon dioxide, hydrogen, etc.) on inorganic membranes via transient modeling.
本文提出了一种基于BaCeYO（BCY10）钙钛矿膜的蒸汽渗透过程动态模型，以深入研究其内部机理。基于该模型，通过模拟详细分析了蒸汽渗透过程中膜内带电物种的瞬态浓度分布、通量以及电势分布。结果表明，提高操作温度、增大膜两侧蒸汽分压差、增加膜密度以及减小膜厚度均可提高蒸汽通量。此外，研究发现蒸汽渗透过程中膜两侧会出现极化电势，尤其是在蒸汽渗透过程的稳态时。在该膜中，极化电势在约1050 K时达到最大值。电势的变化可以解释上述因素对蒸汽渗透过程的影响。本研究推进了钙钛矿膜蒸汽渗透机理的研究，为通过瞬态建模对无机膜上相关物种（氧气、二氧化碳、氢气等）渗透进行基础研究提供了新策略。
