TY - JOUR
T1 - A novel precursor for the sol-gel and CVD methods to prepare alumina permselective membranes
AU - Kim, Ju H.
AU - Choi, Guang J.
AU - Lee, Joong K.
AU - Sim, Sang J.
AU - Kim, Young D.
AU - Cho, Young S.
N1 - Funding Information:
Our research was conducted under a KIST Innovative Research Programme sponsored by the Minister of Science and Technology in Korea.
PY - 1998
Y1 - 1998
N2 - A novel metalorganic compound, AI(OPri)2(etac), was synthesized and used for the preparation of alumina permselective membranes. Membranes were produced by forming permselective thin layers on porous alumina support tubes, either by dip-coating of alumina sol, by the chemical vapour deposition (CVD) technique, or by a combination of the two. In CVD processing, a commercial precursor, AI(OPri)3 was also studied and compared with our novel precursor. Characterization of alumina-producing materials was performed by scanning electron microscopy. X-ray diffraction, transmission electron microscopy, Fourier transform-infrared spectroscopy, thermogravimetric analysis/differential thermal analysis and 1H-nuclear magnetic resonance. The gas separation performance of alumina permselective membranes was measured by permeation experiment using hydrogen and nitrogen gases. For each membrane, gas permeation rates and H2/N2 selectivity were determined. There was a significant difference in the mechanism of CVD deposition between the two compounds. The maximum H2/N2 selectivity among our results was attained by combining sol dip-coating techniques with CVD of our novel precursor, AI(OPri)2(etac).
AB - A novel metalorganic compound, AI(OPri)2(etac), was synthesized and used for the preparation of alumina permselective membranes. Membranes were produced by forming permselective thin layers on porous alumina support tubes, either by dip-coating of alumina sol, by the chemical vapour deposition (CVD) technique, or by a combination of the two. In CVD processing, a commercial precursor, AI(OPri)3 was also studied and compared with our novel precursor. Characterization of alumina-producing materials was performed by scanning electron microscopy. X-ray diffraction, transmission electron microscopy, Fourier transform-infrared spectroscopy, thermogravimetric analysis/differential thermal analysis and 1H-nuclear magnetic resonance. The gas separation performance of alumina permselective membranes was measured by permeation experiment using hydrogen and nitrogen gases. For each membrane, gas permeation rates and H2/N2 selectivity were determined. There was a significant difference in the mechanism of CVD deposition between the two compounds. The maximum H2/N2 selectivity among our results was attained by combining sol dip-coating techniques with CVD of our novel precursor, AI(OPri)2(etac).
UR - http://www.scopus.com/inward/record.url?scp=0032028649&partnerID=8YFLogxK
U2 - 10.1023/A:1004338012233
DO - 10.1023/A:1004338012233
M3 - Article
AN - SCOPUS:0032028649
VL - 33
SP - 1253
EP - 1262
JO - Journal of Materials Science
JF - Journal of Materials Science
SN - 0022-2461
IS - 5
ER -