High-selectivity, high-flux silica membranes for gas separation

  title={High-selectivity, high-flux silica membranes for gas separation},
  author={RM deVos and Verweij},
  volume={279 5357},
Process improvements in silica membrane fabrication, especially the use of clean-room techniques, resulted in silica membranes without detectable mesoscopic defects, resulting in significantly improved transport properties. Supported membranes calcined at 400 degreesC were 30 nanometers in thickness, showed a H2 permeance at 200 degreesC of 2 x 10(-6) moles per square meter per second per Pascal (mol m-2 s-1 Pa-1), and had a CH4 permeance more than 500 times smaller. Molecules larger than CH4… CONTINUE READING
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These results signify an important step toward the industrial application of these membranes such as purification of H2 and natural gas as well as the selective removal of CO2 .
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