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Microporous inorganic membranes for high temperature hydrogen purification
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10.1063/1.3041061
/content/aip/journal/jap/104/12/10.1063/1.3041061
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/12/10.1063/1.3041061

Figures

Image of FIG. 1.
FIG. 1.

Correlation of permeance of individual component with its molecular weight at different temperatures (solid curves are for visual guide) (Ref. 39).

Image of FIG. 2.
FIG. 2.

Schematic depiction of the zeolite membrane formation on a porous substrate: (a) nucleation on the surface and (b) crystal growth into the continuous polycrystalline membrane.

Image of FIG. 3.
FIG. 3.

Topological structures of the ten-member ring MFI zeolite pore openings.

Image of FIG. 4.
FIG. 4.

MFI-type zeolite membrane synthesized by seeded secondary growth method: (a) and (b) surface and cross section of the nanoparticle seed layer and (c) and (d) surface and cross section of the resultant zeolite membrane after secondary growth from a template free precursor solution.

Image of FIG. 5.
FIG. 5.

Structure of the eight-member ring DDR zeolite pore opening.

Image of FIG. 6.
FIG. 6.

SEM pictures of a DDR-type zeolite membrane: (a) surface and (b) cross section (Ref. 52).

Image of FIG. 7.
FIG. 7.

Permeation of equimolar gas mixture during the process of membrane modification (Ref. 55).

Image of FIG. 8.
FIG. 8.

Single gas permeation as a function of temperature before and after membrane modification: (a) permeance and (b) permselectivity.

Image of FIG. 9.
FIG. 9.

Calculated activation energy of gas diffusion for counterdiffusion CVD modified MFI-type (circle symbols) zeolite membranes and that of counterdiffusion CVD modified DDR-type (square symbols) zeolite membranes (Ref. 52) as a function of the ratio of kinetic diameter of the diffusion gas molecule to the zeolite pore diameter .

Image of FIG. 10.
FIG. 10.

TEM image of the cross section of a microporous silica membrane prepared by sol-gel technique on an alumina substrate (Ref. 105).

Image of FIG. 11.
FIG. 11.

Gas permeance through sol-gel-derived microporous silica membranes at different temperatures (Refs. 128 and 129).

Image of FIG. 12.
FIG. 12.

Long-term hydrothermal stability between the pure silica membrane and the composite membrane 03Si–Al prepared using a molar ratio of TEOS/aluminum-tri-sec-butoxide of 33.3 (Ref. 133).

Image of FIG. 13.
FIG. 13.

Proposed mechanism of the pore structure stabilization in the CTMSS material as opposed to the hydrothermal instability of the MSS material (Ref. 140).

Image of FIG. 14.
FIG. 14.

Molecular size dependence of permeation in the silica/-alumina multilayer membrane at (Ref. 143).

Tables

Generic image for table
Table I.

Kinetic diameter and molecular mass for some small gases.

Generic image for table
Table II.

Single gas permeance through MFI zeolite membrane at elevated temperatures.

Generic image for table
Table III.

Single gas permeation in DDR-type membranes.

Generic image for table
Table IV.

Summary of reported gas separation results of CVD-derived silica membranes.

Generic image for table
Table V.

Summary of reported gas separation results of sol-gel-derived silica membranes.

Generic image for table
Table VI.

Summary of reported separation in metal-doped silica membranes.

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/content/aip/journal/jap/104/12/10.1063/1.3041061
2008-12-18
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Microporous inorganic membranes for high temperature hydrogen purification
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/12/10.1063/1.3041061
10.1063/1.3041061
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