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Permeation of Light Gases through Hexagonal Ice

1 and 1,2,*
IBMC—Institute for Molecular and Cell Biology, University of Porto Porto, Rua do Campo Alegre 823, Porto 4150-180, Portugal
ICBAS—Institute of Biomedical Sciences Abel Salazar, Porto 4099-003, Portugal
Author to whom correspondence should be addressed.
Materials 2012, 5(9), 1593-1601;
Received: 16 July 2012 / Revised: 21 August 2012 / Accepted: 27 August 2012 / Published: 5 September 2012
PDF [252 KB, uploaded 5 September 2012]


Gas separation using porous solids have attracted great attention due to their energetic applications. There is an enormous economic and environmental interest in the development of improved technologies for relevant processes, such as H2 production, CO2 separation or O2 and N2 purification from air. New materials are needed for achieving major improvements. Crystalline materials, displaying unidirectional and single-sized pores, preferentially with low pore tortuosity and high pore density, are promising candidates for membrane synthesis. Herein, we study hexagonal ice crystals as an example of this class of materials. By slowly growing ice crystals inside capillary tubes we were able to measure the permeation of several gas species through ice crystals and investigate its relation with both the size of the guest molecules and temperature of the crystal. View Full-Text
Keywords: ice; light gases; diffusion ice; light gases; diffusion

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Durão, J.; Gales, L. Permeation of Light Gases through Hexagonal Ice. Materials 2012, 5, 1593-1601.

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