Hybrid silica membrane for water removal from lower alcohols and hydrogen separation
AssigneeStichting Energieonderzoek Centrum Nederland
InventorsRob Kreiter, Hessel Lennart Castricum, Jaap Ferdinand Vente, Johan Evert Ten Elshof, Maria Dirkje Anna Rietkerk, Henk Martin Veen
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Abstract
A microporous organic-inorganic hybrid membrane based on silica of the invention has an average pore diameter of less than 0.6 nm, and comprises bridging organosilane moieties of the formula ≡O1.5Si—CHR—SiO1.5≡ or ≡O1.5Si—CH(CH3)—SiO1.5≡. The membrane can be used in the separation of hydrogen from mixtures comprising hydrogen and CH4, CO2, CO, N2, and the like, and in the separation of water from alcohols having 1-3 carbon atoms, optionally in the presence of an inorganic or organic acid.
Claims17
A microporous organic-inorganic hybrid membrane based on silica having an average pore diameter between 0.1 and 0.6 nm, and comprising bridging organosilane moieties of the formula
- ≡O1.5Si—CHR—SiO1.5≡
- in which R═H or CH3.
A composite membrane comprising:
- a microporous organic-inorganic hybrid membrane based on silica having an average pore diameter between 0.1 and 0.6 nm, and comprising bridging organosilane moieties of the formula
- ≡O1.5Si—CHR—SiO1.5≡
- in which R═H or CH3;
- and
- a mesoporous support which supports the microporous organic-inorganic hybrid membrane.
A method of separating hydrogen from mixtures having hydrogen and at least one gaseous component, the method comprising:
- providing a microporous organic-inorganic hybrid membrane based on silica having an average pore diameter between 0.1 and 0.6 nm, and comprising bridging organosilane moieties of the formula
- ≡O1.5Si—CHR—SiO1.5≡
- in which R═H or CH3;
- and then
- contacting the mixture and the microporous organic-inorganic hybrid membrane.
A method of separating water from organic molecules, the method comprising:
- providing a microporous organic-inorganic hybrid membrane based on silica having an average pore diameter between 0.1 and 0.6 nm, and comprising bridging organosilane moieties of the formula
- ≡O1.5Si—CHR—SiO1.5≡
- in which R═H or CH3;
- and then
- contacting the organic molecules and the microporous organic-inorganic hybrid membrane.
Dependencies are inferred from the claim text.