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Preparation of Mixed-Matrix Carbon Molecular-Sieve (CMS) Membranes Using Nano-Sized Particles

Thursday, October 20, 2011: 3:33 PM
200 D (Minneapolis Convention Center)
Faezeh Bagheri-Tar1, Muhammad Sahimi1 and Theodore Tsotsis2, (1)University of Southern California, Los Angeles, CA, (2)Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA

We have evaluated the technical feasibility of utilizing mixed-matrix
 (MM) carbon molecular-sieve (CMS) membranes in the separations of H2 and
 CO2 from gas mixtures of relevance to power generation. The MM membranes
 are fabricated by incorporating CMS nanoparticles into a polymer matrix.
 The CMS nanoparticles are prepared by wet-grinding of pyrolyzed pellets
 of polyetherimide. Supported MM-CMS and MM polymeric membranes were both
 prepared. For the MM-CMS membranes, the incorporation of the CMS
 nanoparticles greatly enhanced the permeability and selectivity. An ideal
 CO2/CH4 separation factor of 120 was obtained with a CO2 permeance around
 9.0 × 10-8 mol/m2.s.Pa for membranes with a CMS particle loadings of 10
 wt.%. The corresponding H2 separation factor was 130 and with a H2
 permeance of 9.7 × 10-8 mol/m2.s.Pa. We have also investigated the
 influence of the pyrolysis temperature and total solid% on the permeation
 properties of MM-CMS and CMS membranes. The effect of the CMS
 content on the performances of polymeric supported membranes have also
 been studied.

Extended Abstract: File Not Uploaded
See more of this Session: Membranes for Gas Separations II
See more of this Group/Topical: Separations Division