Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Development of a H2-selective SiO2-membrane for the catalytic dehydrogenation of propane


Seidel-Morgenstern,  A.
Physical and Chemical Foundations of Process Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society;
Otto-von-Guericke-Universität Magdeburg, External Organizations;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Schäfer, R., Noack, M., Kölsch, P., Thomas, S., Seidel-Morgenstern, A., & Caro, J. (2001). Development of a H2-selective SiO2-membrane for the catalytic dehydrogenation of propane. Separation and Purification Technology, 25(1-3), 3-9. doi:10.1016/S1383-5866(01)00085-5.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-A187-B
Commercial alumina ceramic tubes of asymmetric cross section were used as supports for the deposition of SiO2 layers by the sol-gel technique. The SiO2 gel layer has been built up on the gamma-alumina ultrafiltration (UF)-layer of the support by dip-coating with a SiO2-polymer sol. The sol was prepared by a two-step acidic-base hydrolysis of traethylorthosilicate (TEOS) in alcoholic solution with a relative low content of water (H2O:TEOS= 4.3:1). The following step of hydrolysis and condensation was varied by different amounts of NH4OH. These sols of lowly branched SiO2 polymers with 60-70% Q(3) units were used for dip-coating. After drying (2 h at ambient temperature) the membranes have been calcined at 600 degreesC. The resulting membranes show hydrogen fluxes greater than or equal to 20 m (3)(STP)/m(2) h bar and permselectivities hydrogen: propane between 30 and 75 in a temperature region of 450-550 degreesC. The membranes were tested in membrane supported propane dehydrogenation. The propene yield in the membrane reactor can be higher than in a conventional fixed-bed reactor if the hydrogen is removed by a H-2-selective membrane. After several regeneration cycles, stable and acceptable membrane properties are found. © 2001 Elsevier Science B.V. [accessed 2013 November 29th]