Pressure retarded osmosis: Advancement in the process applications for power generation and desalination

Ali Altaee, Adel Sharif

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

The current study highlights the advancement in Pressure Retarded Osmosis (PRO) process and covers most recent development in the process applications. The first application of PRO process goes back to 1973 by Sidney Loeb who suggested using the concept of osmotic energy for power generation. In principle, two solutions of different concentrations are separated by semipermeable membrane of, relatively, high water permeability and solute rejection rate. The high-concentration solution is usually known as the draw solution while the low-concentration solution is called the feed solution. The draw solution is pressurized before entering the membrane. Due to the osmotic pressure gradient across the membrane, fresh water transports in the direction of the osmotic pressure gradients resulting in the dilution of the high-concentration solution. After leaving the membrane, the diluted draw solution is depressurized in a turbine system for power generation. Different types of membrane materials and solute gradient resources were proposed and their impact on the performance of PRO process was investigated. In addition to power generation, the hybridization of PRO process with membrane and thermal processes for power generation and seawater desalination is not unusual nowadays. The current study provides a critical review about the recent advancements in the PRO process and research outcomes.

Original languageEnglish
Pages (from-to)31-46
Number of pages16
JournalDesalination
Volume356
DOIs
Publication statusPublished - 5 Jan 2015

Fingerprint

Osmosis
Desalination
osmosis
power generation
desalination
Power generation
membrane
Membranes
Pressure gradient
pressure gradient
solute
Water
Seawater
turbine
Dilution
dilution
Turbines
permeability
seawater
water

Keywords

  • Desalination
  • Osmotic energy
  • Osmotic power
  • Pressure retarded osmosis
  • Renewable energy
  • Salt energy

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Chemistry(all)
  • Materials Science(all)
  • Water Science and Technology

Cite this

Pressure retarded osmosis : Advancement in the process applications for power generation and desalination. / Altaee, Ali; Sharif, Adel.

In: Desalination, Vol. 356, 05.01.2015, p. 31-46.

Research output: Contribution to journalArticle

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