High-performance hybrid pervaporation membranes with superior hydrothermal and acid stability

Share/Save/Bookmark

Castricum, Hessel L. and Kreiter, Robert and Veen van, Henk M. and Blank, Dave H.A. and Vente, Jaap F. and Elshof ten, Johan E. (2008) High-performance hybrid pervaporation membranes with superior hydrothermal and acid stability. Journal of Membrane Science, 324 (1-2). pp. 111-118. ISSN 0376-7388

[img]PDF
Restricted to UT campus only
: Request a copy
776Kb
Abstract:A new organic–inorganic hybrid membrane has been prepared with exceptional performance in dewatering applications. The only precursor used in the sol–gel synthesis of the selective layer was organically linked 1,2-bis(triethoxysilyl)ethane (BTESE). The microporous structure of this layer enables selective molecular sieving of small molecules from larger ones. In the dehydration of n-butanol with 5% of water, the membrane shows a high separation factor of over 4000 and ultra-fast water transport at a rate of more than 20 kg m−2 h−1 at 150 °C. This can be related to the high adsorption capacity of the material and the sub-micron thickness of the selective layer. The selectivity has now remained constant over almost one and a half years under continuous process testing conditions. Apart from the hydrothermal stability, the membrane exhibits a high tolerance for acid contamination. A slow performance decline in flux and separation factor is only observed at a pH lower than 2. The high stability and effective separation indicate a broad industrial application potential of the hybrid membrane material.
Item Type:Article
Copyright:© 2008 Elsevier
Faculty:
Science and Technology (TNW)
Research Group:
Link to this item:http://purl.utwente.nl/publications/78907
Official URL:http://dx.doi.org/10.1016/j.memsci.2008.07.014
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 250721