Mechanism of Gas Separation through Amorphous Silicon Oxycarbide Membranes
- 7 December 2015
- journal article
- research article
- Published by Wiley in Advanced Engineering Materials
- Vol. 18 (5) , 721-727
Abstract
Polymer‐derived amorphous silicon oxycarbide (SiOC) ceramics are designed for hydrogen separation at high temperatures. To form amorphous SiOC top‐coating with the thickness of about 300 nm, tubular porous γ‐Al2O3/α‐Al2O3 substrates with gradient porosity are threefold coated by vinyl‐functionalized polysiloxane and pyrolyzed at 700 °C under argon. N2‐physisorption measurement confirms formation of microporous material with a specific surface area of about 400 m2 g–1. Single gas permeance characterization of the SiOC membrane at 300 °C reveals H2/CO2 and H2/SF6 ideal permselectivities of about 10 and 320, respectively. The experimental gas permeance data are modeled using solid‐state diffusion (for He and H2) and gas translational diffusion (for CO2 and SF6) mechanisms.Keywords
This publication has 49 references indexed in Scilit:
- An economic survey of hydrogen production from conventional and alternative energy sourcesInternational Journal of Hydrogen Energy, 2010
- Polymer‐Derived Ceramics: 40 Years of Research and Innovation in Advanced CeramicsJournal of the American Ceramic Society, 2010
- Microporous inorganic membranes for high temperature hydrogen purificationJournal of Applied Physics, 2008
- Front Matter2008
- Relationship between the Mesoporous Intermediate Layer Structure and the Gas Permeation Property of an Amorphous Silica Membrane Synthesized by Counter Diffusion Chemical Vapor DepositionJournal of the American Ceramic Society, 2007
- Precursors-Derived Ceramic Membranes for High-Temperature Separation of HydrogenJournal of the Ceramic Society of Japan, 2007
- High-temperature membranes in power generation with CO2 captureChemical Engineering and Processing - Process Intensification, 2004
- State-of-the-Art of Supported Metal Membranes for Gas SeparationSeparation and Purification Methods, 1999
- Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendations 1984)Pure and Applied Chemistry, 1985
- Adsorption of Gases in Multimolecular LayersJournal of the American Chemical Society, 1938