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多孔陶瓷膜在毛细管冷凝传质机理的作用下能够有效地分离吸附性气体。而毛细管冷凝膜分离传质机理的研究还很不充分,目前,文献报道仅局限于纯组分气体的传质模型研究。本文以改性氧化铝膜对乙醇-水物系的蒸气渗透分离过程为研究对象,优选出了二元气体在毛细管冷凝膜分离过程中的组分渗透系数的计算模型;建立了多孔陶瓷膜的传质模型,对蒸气渗透分离过程的模拟证实了该模型的可靠性。
Porous ceramic membrane in the capillary condensation mass transfer mechanism under the effect of the separation of adsorbed gas. However, the research on the mechanism of the separation and mass transfer of the capillary condensation membrane is still inadequate. At present, the literature reports that it is limited to the mass transfer model of the pure component gas. In this paper, the vapor-permeation separation process of ethanol-water system with modified alumina membrane is taken as the research object, the calculation model of the component permeability coefficient of binary gas in the process of capillary condensation membrane is optimized, and the porous ceramic membrane The mass transfer model, which simulates the steam permeation separation process, confirms the reliability of the model.