TY - JOUR
T1 - Poly(1-trimethylsilyl-1-propyne)/MFI composite membranes for butane separations
AU - Woo, M.
AU - Choi, J.
AU - Tsapatsis, M.
N1 - Funding Information:
We gratefully acknowledge the financial support of NSF NIRT, CBET-0403574, and CBET-0522518. All characterizations were performed at the Minnesota Characterization Facility, which receives support from NSF through the National Nanotechnology Infrastructure Network (NNIN). We thank S. Maheshwari (University of Minnesota) for the microtomy work.
PY - 2008/4/15
Y1 - 2008/4/15
N2 - The separation of equimolar mixtures of i-butane and n-butane through poly(1-trimethylsilyl-1-propyne)/MFI composite membranes was studied. Membranes were characterized by XRD and SEM. Addition of 50 wt% MFI particles into a PTMSP matrix showed increased permeability and simultaneous improved selectivity in the temperature range 25-200 °C. The best improvement was seen at 150 °C for the composites, giving almost threefold increase in permeability and 56% higher n-butane/i-butane selectivity over the pure polymer. To our knowledge, this is the first successful demonstration of the incorporation of a molecular sieve into a polymer matrix for butane isomer separations. The composite membranes were also tested for separations of n-hexane/2,2-dimethylbutane and p-xylene/o-xylene.
AB - The separation of equimolar mixtures of i-butane and n-butane through poly(1-trimethylsilyl-1-propyne)/MFI composite membranes was studied. Membranes were characterized by XRD and SEM. Addition of 50 wt% MFI particles into a PTMSP matrix showed increased permeability and simultaneous improved selectivity in the temperature range 25-200 °C. The best improvement was seen at 150 °C for the composites, giving almost threefold increase in permeability and 56% higher n-butane/i-butane selectivity over the pure polymer. To our knowledge, this is the first successful demonstration of the incorporation of a molecular sieve into a polymer matrix for butane isomer separations. The composite membranes were also tested for separations of n-hexane/2,2-dimethylbutane and p-xylene/o-xylene.
KW - Hybrid materials
KW - Membranes
KW - Permeation properties
KW - Poly(1-trimethylsilyl-1-propyne)
KW - Zeolites
UR - http://www.scopus.com/inward/record.url?scp=39849084077&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2007.06.044
DO - 10.1016/j.micromeso.2007.06.044
M3 - Article
AN - SCOPUS:39849084077
SN - 1387-1811
VL - 110
SP - 330
EP - 338
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
IS - 2-3
ER -