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Received March 17, 2003
Accepted August 11, 2003
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The Effect of Humidity on the Durability of Inorganic Membranes
Department of Applied Chemistry, Kyushu University, Fukuoka 812-8581, Japan
Korean Journal of Chemical Engineering, November 2003, 20(6), 1079-1084(6), 10.1007/BF02706940
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Abstract
Porous oxide membranes of γ-alumina, zirconia and silica were prepared on porous α-alumina tubes by sol-gel processes. γ-Alumina and zirconia membranes impregnated with platinum were also prepared. The permeation properties of these membranes were investigated by using unary and binary feeds of H2 and CO2 at 423 K. After permeation for 5 h with humidification at a concentration of 3 mol%, no large changes were found for the zirconia and γ-alumina membranes, but the permeances to H2 and CO2 for the silica membrane were decreased by 10-20%. A 70-h exposure to humidified feeds showed that the zirconia- and γ-alumina-based membranes were more resistant than the silica membrane. The decrease in H2 permeance was only 5% for the zirconia-based membranes and 17.4% for the silica membrane. The Pt-loaded γ-alumina membrane remained defect-free after one-month of exposure to the humidified feeds at 423 K.
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References
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Gu YF, Kusakabe K, Morooka S, Sep. Sci. Technol., 36(16), 3689 (2001)
Gu Y, Kusakabe K, Morooka S, Sep. Purif. Technol., 24, 489 (2001)
Gu YF, Kusakabe K, Morooka S, J. Chem. Eng. Jpn., 35(5), 421 (2002)
Guan GQ, Kusakabe K, Morooka S, J. Chem. Eng. Jpn., 34(8), 990 (2001)
Hasegawa Y, Ueda A, Kusakabe K, Morooka S, Appl. Catal. A: Gen., 225(1-2), 109 (2002)
Hasegawa Y, Tanaka T, Watanabe K, Jeong BH, Kusakabe K, Morooka S, Korean J. Chem. Eng., 19(2), 309 (2002)
Iler RK, "The Chemistry of Silica," Wiley, New York (1979)
Ioannides T, Verykios XE, Catal. Lett., 36(3-4), 165 (1996)
Ismail AF, David LIB, J. Membr. Sci., 193(1), 1 (2001)
Kim YS, Kusakabe K, Morooka S, Yang SM, Korean J. Chem. Eng., 18(1), 106 (2001)
Kusakabe K, Sakamoto S, Saie T, Morooka S, Sep. Purif. Technol., 16, 139 (1999)
Morooka S, Yan S, Kusakabe K, Akiyama Y, J. Membr. Sci., 101(1-2), 89 (1995)
Morooka S, Kusakabe K, MRS Bull., 24, 25 (1999)
Pan M, Cooper C, Lin YS, Meng GY, J. Membr. Sci., 158(1-2), 235 (1999)
Poshusta JC, Tuan VA, Pape EA, Noble RD, Falconer JL, AIChE J., 46(4), 779 (2000)
Tsapatsis M, Gavalas G, J. Membr. Sci., 87(3), 281 (1994)
Uhlhorn RJR, Keizer K, Burggraaf AJ, J. Membr. Sci., 66, 271 (1992)
Wu JC, Sabol H, Smith GW, Flowers DL, Liu PK, J. Membr. Sci., 96(3), 275 (1994)
Yoldas BE, Ceram. Bull., 54, 289 (1975)
