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Updated: Jun 5, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

H2 separation using defect-free, inorganic composite membranes.

Miao Yu¹, Hans H Funke, Richard D Noble

¹Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309-0424, United States. miao.yu@colorado.edu

Journal of the American Chemical Society

|January 21, 2011

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Defect-free alumina/SAPO-34 zeolite composite membranes show high efficiency for hydrogen separation. These advanced inorganic membranes offer superior H(2)/N(2) selectivity, paving the way for new gas separation technologies.

Area of Science:

Materials Science
Chemical Engineering
Nanotechnology

Background:

Zeolite membranes are crucial for gas separation.
SAPO-34 membranes exhibit limitations in selectivity.
Microporous alumina offers potential for enhancing membrane performance.

Purpose of the Study:

To develop defect-free alumina/SAPO-34 zeolite composite membranes.
To evaluate the hydrogen separation efficiency of these composite membranes.
To investigate the impact of alumina coating on membrane selectivity.

Main Methods:

Hydrothermal growth of SAPO-34 zeolite membranes.
Coating with microporous alumina using molecular layer deposition.
Testing H(2)/N(2) and H(2)/CO(2) separation selectivity under various conditions.

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Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO₂/Si/SiO₂ Wafers for Green Desalination

Published on: March 1, 2020

Related Experiment Videos

Last Updated: Jun 5, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO₂/Si/SiO₂ Wafers for Green Desalination

Published on: March 1, 2020

Main Results:

Achieved defect-free Al(2)O(3)/SAPO-34 composite membranes.
Demonstrated significantly enhanced H(2)/N(2) selectivity (up to 1040) compared to SAPO-34 alone (selectivity 8).
Maintained high H(2)/N(2) selectivity (750) at 473 K and 1.5 MPa; H(2)/CO(2) selectivity was 20.

Conclusions:

Alumina coating enhances SAPO-34 membrane performance for hydrogen separation.
The enhanced selectivity is attributed to pore size modification by the alumina layer.
These composite membranes represent a promising new class of inorganic membranes for gas separation.