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将膜分离技术与微流体技术的优势相结合,开发设计了新型膜微反应器,该设备比表面积大且扩散距离短,可以强化渗透汽化过程。以正丁醇-水体系的分离效果为实验模型,分析了膜微反应器的渗透汽化性能。在不同料液温度、料液水含量及料液流速条件下,对膜微反应器中正丁醇-水体系的分离性能进行了系统的研究。当料液温度升高时,渗透通量增大。当进口料液水含量升高时,渗透通量明显增大。当流速升高时,渗透通量增大且趋势逐渐变缓。在实验研究的基础上,建立了渗透汽化传质模型,模型计算值与实验值吻合良好。
The membrane separation technology and the advantages of microfluidic technology combine to develop and design a new type of membrane microreactor, the device surface area and diffusion distance is short, can enhance the pervaporation process. Taking the separation effect of n-butanol-water system as an experimental model, the pervaporation performance of the membrane microreactor was analyzed. The separation performance of n-butanol-water system in membrane microreactor was systematically studied under different feed liquid temperature, feed water content and feed flow rate. As the feed temperature increases, the permeate flux increases. When the feed liquid water content increased, the permeate flux increased significantly. As the flow rate increases, the permeate flux increases and the trend becomes slower. Based on the experimental study, a model of pervaporation and mass transfer was established. The calculated values agree well with the experimental data.