In this paper the anode porous diffusion layer model of dmfc for mass transfer has been described on the basis that all components are gaseous and well mixed . the purpose of the model is to determine the variation in concentration of species in the diffusion layer and thus the concentration of the reactive species at the edge of the reaction layer 本文还推导出了气相进料的dmfc阳极多孔扩散层模型，模型详细描述了甲醇，水以及二氧化碳在扩散层中的传递和反应，使用本模型可以确定各种物质在阳极多孔扩散层中浓度的变化，并可由此确定气体扩散层催化剂层边界处反应物质的浓度。
