TY - JOUR

T1 - Propane/propene permeation through Na-X membranes

T2 - The interplay of separation performance and pre-synthetic support functionalization

AU - Mundstock, Alexander

AU - Wang, Nanyi

AU - Friebe, Sebastian

AU - Caro, Jürgen

N1 - Funding Information: Financial support by DFG priority program 1570 “Porous media with defined pore structure in chemical engineering - modeling, application, synthesis” ( CA 147/17-1 and 2) is acknowledged.

PY - 2015/10/1

Y1 - 2015/10/1

N2 - The influence of different pre-synthetic support modifications on membrane quality for paraffin/olefin and H2/CO2 separation has been investigated. It could be shown that when modifying the alumina support surface by agents like PDA (polydopamine) or APTES (3-aminopropyltriethoxysilane) as molecular linkers between the FAU layer and the alumina support, well intergrown dense membranes with less defects and, therefore, increased separation selectivities can be obtained. As model system, the propane/propene separation has been used. For binary mixtures at room temperature and 1 bar at both sides of the FAU membrane, the mixed gas separation factors of C3H8/C3H6 are found to be 3.3 for membranes grown on APTES and 2.0 for PDA functionalized supports in comparison to 1.4 for FAU membranes grown on the non-treated neat alumina supports. The improved FAU membrane quality when applying APTES and PDA for support modification in comparison with the neat untreated alumina support, has been proven for the separation of H2/CO2. Thanks to the relative thin FAU layers (3-4 μm), moderate fluxes can be obtained.

AB - The influence of different pre-synthetic support modifications on membrane quality for paraffin/olefin and H2/CO2 separation has been investigated. It could be shown that when modifying the alumina support surface by agents like PDA (polydopamine) or APTES (3-aminopropyltriethoxysilane) as molecular linkers between the FAU layer and the alumina support, well intergrown dense membranes with less defects and, therefore, increased separation selectivities can be obtained. As model system, the propane/propene separation has been used. For binary mixtures at room temperature and 1 bar at both sides of the FAU membrane, the mixed gas separation factors of C3H8/C3H6 are found to be 3.3 for membranes grown on APTES and 2.0 for PDA functionalized supports in comparison to 1.4 for FAU membranes grown on the non-treated neat alumina supports. The improved FAU membrane quality when applying APTES and PDA for support modification in comparison with the neat untreated alumina support, has been proven for the separation of H2/CO2. Thanks to the relative thin FAU layers (3-4 μm), moderate fluxes can be obtained.

KW - APTES modification

KW - FAU membrane

KW - Olefin-paraffin separation

KW - Polydopamine modification

KW - Support modification

UR - http://www.scopus.com/inward/record.url?scp=84930642827&partnerID=8YFLogxK

U2 - 10.1016/j.micromeso.2015.05.019

DO - 10.1016/j.micromeso.2015.05.019

M3 - Article

AN - SCOPUS:84930642827

VL - 215

SP - 20

EP - 28

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

SN - 1387-1811

ER -