Development of pressure retarded osmosis system using a novel ionic- barrier charged-membrane

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A forward osmosis (FO) membrane with high ionic barrier properties and high water permeability is needed for commercial pressure retarded osmosis (PRO) power plants that use the FO phenomenon caused by the osmotic difference between salty water and fresh water. A novel ionic-barrier (IB) charged-membrane was developed which has high FO performance. An FO/PRO performance evaluation system for a flat-sheet membrane was developed. The prepared IB charged membrane has higher ionic barrier properties and higher water permselectivity than commercial FO membranes with no charged groups because of the fixed-charged groups of the IB charged membrane. Hence, a PRO system using the IB charged membrane will have high performance for PRO power generation.