Temperature drop of feed liquid during pervaporation |
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| Affiliation: | 1. Natural Fluids Refrigeration Center, Faculty of Mechanical Engineering, GIK Institute of Engineering Sciences and Technology, Topi, Pakistan;2. Isotherm, Inc., 7401 Commercial Blvd. E., Arlington, TX;3. Mechanical Engineering Department, Petroleum Institute, Abu Dhabi, United Arab Emirates |
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| Abstract: | Heat transfer during pervaporation through a membrane module of silicone-rubber microtubes was studied for ammonia/water and ethanol/water feeds. The temperature drops of the feed mixture were measured as a function of flow rate, concentration and permeate side pressure. A model calculation with a vapor-phase driving force was compared with the data. The vapor permeability of the permeate components needed in the model were independently measured using an original measurement method with a differential transformer. The present simple model for heat and mass transfer during pervaporation proved to be applicable to the theoretical calculation for a membrane module of pervaporation to be used as a heat-transfer unit. |
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