摘要
引言
在硅橡胶膜的渗透蒸发传质动力学研究中,膜内的扩散传质是一个主要问题.膜内扩散传质阻力决定于有机物在膜-水两相中的分配系数(K)、有机物在膜内的扩散系数(Dmem)和膜厚度(δ).
The pervaporation of organics from dilute aqueous solution through a novel plate composite silicone rubber membrane was investigated. The measured and derived data indicated that the composite membrane possessed very high permeation flux and stable selectivity for dilute organic aqueous solution. Based upon the well- known resistance-in- series model, diffusive mass transfer behavior in membrane was investigated by calculation from the measured data with different skin layer thickness of membranes. The experimental results showed that the diffusive mass transfer coefficient conformed to Arrhenius correlation with temperature and was independent of the flow status. The diffusivities of the given alcohols in membrane had an order of magnitude 10 m-10·s-1 at a wider range of temperature, which is similar to those reported in literatures.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2002年第12期1315-1319,共5页
CIESC Journal
基金
国家自然科学基金(No.20176030)
江苏省自然科学基金(No.BK2001037)资助项目.
