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Techno-Economic Analysis towards Full-Scale Pressure Retarded Osmosis Plants

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journal contribution
submitted on 2024-07-02, 11:29 and posted on 2024-07-02, 11:31 authored by Elizabeth I. Obode, Ahmed Badreldin, Samer Adham, Marcelo Castier, Ahmed Abdel-Wahab

Pressure retarded osmosis (PRO) is a power generation process that harnesses the salinity gradient between two water bodies of different salinities. Using high salinity water as a draw solution, this work assesses the techno-economic feasibility of the technology to generate electricity using single and multistage systems. This work utilizes a simulator built on the rigorous Q-Electrolattice equation of state and a mass transfer model that accounts for concentration polarization, combined with the Dakota optimization tool to perform sensitivity analysis and optimization studies. The economic indicator of interest is the Levelized Cost of Electricity (LCOE), which serves to compare PRO with other sources of renewable energy. An LCOE value of USD 0.1255/kWh was obtained from the use of commercial membranes at an efficiency of 100% for the mechanical components of the PRO system. This LCOE drops to USD 0.0704/kWh when an ideal membrane is used—thus showing the improvements to economics possible with improved membrane properties. With currently obtainable membrane properties and mechanical equipment, the LCOE of a single-stage process increases to USD 0.352/kWh, which is not cost-competitive with other renewable energy sources. Setting up multistage PRO systems towards minimizing the LCOE was found to be detrimental to the net power production by the plant.

Other Information

Published in: Energies
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Additional institutions affiliated with: Chemical Engineering Program - TAMUQ


Qatar National Research Fund (NPRP10-1231-160069), Sustainable Reuse of Hypersaline Oil-Produced Water for Green Energy Production.

ConocoPhillips Global Water Sustainability Center (N/A).



  • English



Publication Year

  • 2022

License statement

This Item is licensed under the Creative Commons Attribution 4.0 International License.

Institution affiliated with

  • Texas A&M University at Qatar
  • Qatar Science & Technology Park
  • ConocoPhillips Water Technology Ltd QSTP-B

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