Experimental and Theoretical Study on Small Gas Permeation Properties through Amorphous Silica Membranes Fabricated at Different Temperatures

The sol–gel method was applied to fabrication of amorphous silica membranes, which have different silica network sizes caused by control of the calcination temperatures. The effects of fabrication temperature on small gas (He, H2, Ne, NH3, CO2, N2, and CH4) permeation properties through silica membranes were evaluated quantitatively using modified gas translation (GT) model. A silica membrane fired at 550 °C showed He and H2 permeances of 8.6 × 10–7 and 5.5 × 10–7 mol m–2 s–1 Pa–1 with He/CH4 and H2/CH4 permeance ratios of 2350 and 1500 at 500 °C, respectively. The thermal stability was dramatically improved by the fabrication of deposited silica glass intermediate layer because N2 permeance showed slight change, and the membrane showed a H2/N2 permeance ratio above 100 even heat-treated at 750 °C. The estimated silica network size decreased from 0.385 to 0.347 nm when a membrane was fabricated at 750 °C, which was consistent with the trend in activation energy of gas permeation. H2 molecules were more pe...

[1]  Masakoto Kanezashi,et al.  Hydrogen Permeation Properties and Hydrothermal Stability of Sol–Gel‐Derived Amorphous Silica Membranes Fabricated at High Temperatures , 2013 .

[2]  Masakoto Kanezashi,et al.  Micropore size estimation on gas separation membranes: A study in experimental and molecular dynamics , 2013 .

[3]  Yi Zhao,et al.  Effect of chemical modification on carbon dioxide adsorption property of mesoporous silica. , 2012, Journal of colloid and interface science.

[4]  Masakoto Kanezashi,et al.  Gas permeation properties of silica membranes with uniform pore sizes derived from polyhedral oligomeric silsesquioxane , 2012 .

[5]  Masakoto Kanezashi,et al.  Organic–Inorganic Hybrid Silica Membranes with Controlled Silica Network Size for Propylene/Propane Separation , 2012 .

[6]  T. Sugawara,et al.  Review on mechanisms of gas permeation through inorganic membranes , 2011 .

[7]  C. Arean,et al.  Silanol-Related and Unspecific Adsorption of Molecular Ammonia on Highly Dehydrated Silica , 2011 .

[8]  Masakoto Kanezashi,et al.  Evaluation and fabrication of pore‐size‐tuned silica membranes with tetraethoxydimethyl disiloxane for gas separation , 2011 .

[9]  Masakoto Kanezashi,et al.  Permeation properties of hydrogen and water vapor through porous silica membranes at high temperatures , 2011 .

[10]  Masakoto Kanezashi,et al.  Extremely thin Pd-silica mixed-matrix membranes with nano-dispersion for improved hydrogen permeability. , 2010, Chemical communications.

[11]  Masakoto Kanezashi,et al.  Characteristics of ammonia permeation through porous silica membranes , 2009 .

[12]  Y. S. Lin,et al.  Exposing the Molecular Sieving Architecture of Amorphous Silica Using Positron Annihilation Spectroscopy , 2008 .

[13]  T. Tsuru,et al.  Characterization of Co‐Doped Silica for Improved Hydrothermal Stability and Application to Hydrogen Separation Membranes at High Temperatures , 2008 .

[14]  J. E. Elshof,et al.  Hydrothermal stability of microporous silica and niobia-silica membranes , 2008 .

[15]  Shaomin Liu,et al.  Metal doped silica membrane reactor: Operational effects of reaction and permeation for the water gas shift reaction , 2008 .

[16]  G. V. Gibbs,et al.  Activation energies for permeation of He and H2 through silica membranes: An ab initio calculation study , 2008 .

[17]  T. Tsuru.  Nano/subnano-tuning of porous ceramic membranes for molecular separation , 2008 .

[18]  S. Oyama,et al.  Hydrothermally stable silica–alumina composite membranes for hydrogen separation , 2008 .

[19]  S. Nakao,et al.  Relationship between the mesoporous intermediate layer structure and the gas permeation property of an amorphous silica membrane synthesized by counter diffusion chemical vapor deposition , 2007 .

[20]  T. Nenoff,et al.  Membranes for hydrogen separation. , 2007, Chemical reviews.

[21]  S. Oyama,et al.  High Molecular Permeance in a Poreless Ceramic Membrane , 2007 .

[22]  Sadao Araki,et al.  Synthesis, characterization and gas permeation properties of a silica membrane prepared by high-pressure chemical vapor deposition , 2007 .

[23]  M. Asaeda,et al.  Stability of H2-Permeselective Ni-doped Silica Membranes in Steam at High Temperature , 2005 .

[24]  R. Saraf,et al.  Theory of hydrogen permeability in nonporous silica membranes , 2004 .

[25]  R. Saraf,et al.  Synthesis, characterization, and gas permeation properties of a hydrogen permeable silica membrane supported on porous alumina , 2004 .

[26]  Kaoru Onuki,et al.  Hydrogen separation in H2–H2O–HI gaseous mixture using the silica membrane prepared by chemical vapor deposition , 1999 .

[27]  A. V. Rao,et al.  Influence of temperature on the physical properties of TEOS silica xerogels , 1999 .

[28]  Midori Watanabe,et al.  Hydrogen recovery from a H2-H2O-HBr mixture utilizing silica-based membranes at elevated temperatures. 1. Preparation of H2O- and H2-selective membranes , 1998 .

[29]  M. V. Leeuwen.  Derivation of Stockmayer potential parameters for polar fluids , 1994 .

[30]  Michael Tsapatsis,et al.  Structure and aging characteristics of H2-permselective SiO2-Vycor membranes , 1994 .

[31]  James Wei,et al.  Diffusion mechanism of hydrocarbons in zeolites—I. Theory , 1992 .

[32]  J. Dumesic,et al.  Microcalorimetric measurements of basic molecule adsorption on silica and silica-alumina , 1991 .

[33]  R. Fulrath,et al.  Diffusivity of helium in fused silica , 1973 .

[34]  D. R. Begeal,et al.  Diffusion and Permeation of He, Ne, Ar, Kr, and D2 through Silicon Oxide Thin Films , 1971 .

[35]  A. Dixon,et al.  Theory of gas diffusion and permeation in inorganic molecular-sieve membranes , 1995 .