Defect‐free palladium membranes on porous stainless‐steel support

AICHE Journal - Tập 44 Số 2 - Trang 310-322 - 1998
Peter Mardilovich1, Ying She1, Yi Hua1, Min‐Hon Rei2
1Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609
2China Technical Consulting, Inc., Taipei, Taiwan, R.O.C.

Tóm tắt

AbstractDefect‐free Pd membranes were prepared by an electroless plating technique on porous stainless‐steel tubes. The effective surface of Pd membranes was up to 75 cm2. The helium flux was not detected at room temperature and pressure difference of 3 atm. At 350°C hydrogen permeances of up to \documentclass{article}\pagestyle{empty}\begin{document}$ 8\ m^3 /(m^2 \cdot \overrightarrow h \cdot atm^{0.5}) $\end{document} were obtained. A t a pressure difference of 1 atm and 350°C, selectivity coefficients as high as J(H2/JN2) = 5,000 were observed. Fluxes of gases, impermeable through the Pd, were quantitatively described as a combination of Knudsen diffusion and viscous flow through the gaps created in the Pd layer at high temperatures. The stability of the prepared membranes at temperatures up to 700°C was investigated. The membranes were stable at 350°C over a period of 1,100 h, with no significant changes in the steady‐state hydrogen flux and with a recrystallization texture and aggregation of Pd grains.

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Tài liệu tham khảo

10.1016/0376-7388(94)00042-5

Berry L. G., 1974, Powder Diffraction File, 4‐783 and 5‐0681

10.1016/0921-5093(95)09950-6

10.1016/S0927-5193(96)80012-X

10.1016/0376-7388(93)85004-G

10.1021/ie950105o

10.1021/ie00024a008

Cullity B. D., 1978, Elements of X‐Ray Difiaction

10.1016/0376-7388(95)00110-X

10.1016/0376-7388(93)85074-7

10.1021/ie00051a024

10.1016/0926-860X(93)80003-9

Honma H. andK.Kanemitsy “Electroless Nickel Plating on Alumina Ceramics ”Plat. Surf: Finish. 62(1987).

10.1063/1.1701003

10.1016/0025-5408(91)90118-6

10.1016/0376-7388(94)00213-I

10.1016/0376-7388(95)00040-J

10.1016/0376-7388(94)00212-H

10.1016/0950-4214(91)80035-4

10.1016/S0376-7388(00)83072-0

10.1016/0376-7388(93)80004-H

Lide D. R., 1996, Handbook of Chemistry and Physics

Mardilovich P. P., 1996, Gas Permeability of Anodized Alumina Membranes with a Palladium‐Ruthenium Alloy Layer, Russ. J. Phys. Chem., 70, 514

Mardilovich P. P. Y.She M.‐H.Rei andY. H.Ma “Permeation Characterization of Defect Free Pdflorous Stainless Steel Membranes ” Int. Conf. on Inorganic Membranes Gatlinburg TN (1996b).

McBride R. B., 1965, A New Hydrogen Recovery Route, Chem Eng. Progr., 61, 81

Melashschenko N. F. Galvanic Coatings of Dielectrics Belarus Minsk (1987).

10.1080/01496399508013720

Mott Metallurgical Corporation or Newmet Krebsoge Inc. Manufacturer literature (1995).

10.1016/0376-7388(95)00298-7

10.1080/01614949408013927

10.1002/cjce.5450690503

10.1016/0376-7388(93)85068-8

10.1246/cl.1988.1687

10.1016/S0376-7388(00)83040-9

10.1016/S0376-7388(00)83041-0

10.1016/S0376-7388(00)80337-3

10.1021/ie00027a019

10.1002/aic.690410912

10.1016/S0167-2991(96)80347-8

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AICHE Journal

Tập 44 Số 2

310-322

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