Abstract
A novel membrane gas dehydration process in a pressure-electric coupled field was proposed to enhance water vapor permeation and water/gas separation. An electric potential gradient generated by an asymmetric electric field across the membrane was utilized as an additional driving force for polar molecules (e.g., water) to transport through the membrane. The enhancement in water permeation was evaluated and the improvement in water/gas separation was confirmed. The effects of operating parameters (including voltage gradient, pressure gradient, and operating temperature) on permeation were investigated. The results also showed that the activation energy for water permeation was reduced by the electric field.
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