Michael Daramola


Julianalaan 136, 2628 BL Delft
ChemE 0.471B
Tel: +31 (0) 15 2784396
Fax: *31 (0)15 2785006 


Selective Removal of Water using Hydroxy Sodalite Membranes   

Virtually all industrial processes use water. Water removal/purification at low cost and low energy is, thus, essential! Water removal/separation via distillation is energy intensive because it involves huge equipment costs & lacks potential for in situ water removal. Current membrane-based technologies, e.g. seawater reverse osmosis (SWRO) is associated with low water recovery (50%) and high energy consumption (3-5 kWhm-3) leading to an increase in operating costs. Development of affordable alternative technologies with high energy efficiencies for in situ water removal is inevitable for water sustainability.

In this project, application of hydrophilic Hydroxy Sodalite (H-SOD) membranes for selective removal of water is proposed. In particular, the project is aimed at developing a reproducible, robust and easy-to-scale-up technique for a single-step synthesis of H-SOD membranes on α-alumina substrate. The developed technique will be applied in the synthesis of defect-free H-SOD membranes applicable in the following industrial processes:

  • Production of ultra-pure water from seawater
  • In situ separation of water from CO2/H2O mixtures under supercritical CO2 conditions
  • In situ removal of water in membrane reactors.

Significance of research

This project is expected to result into the development of energy-efficient membrane-based technologies for selective removal of water from industrial processes. Specifically, the idea is to scale-up reproducible defect-free high flux single H-SOD membrane fibres into fibre bundles (see Figure) for industrial applications.


Strategies that would be employed to achieve the aforementioned goal include:

  • Labscale development and synthesis of H-SOD  membranes on α-alumina supports
  • Application of  the as-synthesized membranes to selected industrial processes
  • Optimization  and scale-up studies 


Technology Foundation STW, The Netherlands and Hyflux CEPAration Technologies Europe BV are gratefully acknowledged for financial support through the partnership programme STW-Hyflux CEPAration Inorganic and Hybrid Membranes.