Matches in SemOpenAlex for { <https://semopenalex.org/work/W2087750045> ?p ?o ?g. }
Showing items 1 to 89 of
89
with 100 items per page.
- W2087750045 endingPage "51" @default.
- W2087750045 startingPage "37" @default.
- W2087750045 abstract "Silica membranes with extremely low defect concentrations have been prepared using sol–gel synthesis starting from tetraethyl orthosilicate (TEOS). An asymmetric structure is obtained by applying two silica layers on top of a γ-Al2O3 layer, supported by an α-Al2O3 support. The selective silica top layers have a total thickness of 30 nm and micropores with a pore diameter 5 A, determined by physical adsorption on unsupported silica membrane material. The morphology of the homogenous silica layer is analysed by FE-SEM and TEM. The transport properties of the membranes are measured in the temperature range of 50–300°C and at pressure differences ranging from 0.5 to 3 bar. The membranes have reproducible high permeances (2×10−6 mol/m2·s·Pa) for H2 and much lower permeances for CO2, N2, and O2 (10× lower), CH4 (500× lower). The silica membranes show a slight increase of permeance with increasing temperature for H2, CH4, N2, O2 and a slight decrease for CO2. For the time being the pore size of the microporous supported silica membranes can be estimated best from the relation between the permeance and kinetic diameter (dk) of the gases used. The pore size can be derived from the value of the dk of the smallest gas where permeance is no more observed. The silica membranes can be applied for different types of separations: CO2/CH4 with a permselectivity (Fα) of 75, O2/N2 with Fα=4, H2/CH4 with Fα>500 and H2/CO2 with Fα=70, all at 200°C. Separation factors obtained from gas separation experiments with 50/50 (vol.%) gas mixtures are very similar to permselectivities calculated from single gas permeance experiments." @default.
- W2087750045 created "2016-06-24" @default.
- W2087750045 creator A5003070533 @default.
- W2087750045 creator A5024794478 @default.
- W2087750045 date "1998-05-01" @default.
- W2087750045 modified "2023-09-25" @default.
- W2087750045 title "Improved performance of silica membranes for gas separation" @default.
- W2087750045 cites W107542209 @default.
- W2087750045 cites W1263490030 @default.
- W2087750045 cites W1519501510 @default.
- W2087750045 cites W1528613852 @default.
- W2087750045 cites W1530624116 @default.
- W2087750045 cites W1978184749 @default.
- W2087750045 cites W1984995107 @default.
- W2087750045 cites W1990316238 @default.
- W2087750045 cites W2021231112 @default.
- W2087750045 cites W2026320966 @default.
- W2087750045 cites W2042170886 @default.
- W2087750045 cites W2042272880 @default.
- W2087750045 cites W2043690253 @default.
- W2087750045 cites W2072746437 @default.
- W2087750045 cites W2094408767 @default.
- W2087750045 cites W2137104397 @default.
- W2087750045 cites W2156469147 @default.
- W2087750045 cites W2886619126 @default.
- W2087750045 cites W99240425 @default.
- W2087750045 doi "https://doi.org/10.1016/s0376-7388(97)00334-7" @default.
- W2087750045 hasPublicationYear "1998" @default.
- W2087750045 type Work @default.
- W2087750045 sameAs 2087750045 @default.
- W2087750045 citedByCount "320" @default.
- W2087750045 countsByYear W20877500452012 @default.
- W2087750045 countsByYear W20877500452013 @default.
- W2087750045 countsByYear W20877500452014 @default.
- W2087750045 countsByYear W20877500452015 @default.
- W2087750045 countsByYear W20877500452016 @default.
- W2087750045 countsByYear W20877500452017 @default.
- W2087750045 countsByYear W20877500452018 @default.
- W2087750045 countsByYear W20877500452019 @default.
- W2087750045 countsByYear W20877500452020 @default.
- W2087750045 countsByYear W20877500452021 @default.
- W2087750045 countsByYear W20877500452022 @default.
- W2087750045 countsByYear W20877500452023 @default.
- W2087750045 crossrefType "journal-article" @default.
- W2087750045 hasAuthorship W2087750045A5003070533 @default.
- W2087750045 hasAuthorship W2087750045A5024794478 @default.
- W2087750045 hasConcept C119857082 @default.
- W2087750045 hasConcept C127413603 @default.
- W2087750045 hasConcept C18411161 @default.
- W2087750045 hasConcept C185592680 @default.
- W2087750045 hasConcept C192562407 @default.
- W2087750045 hasConcept C2776061190 @default.
- W2087750045 hasConcept C41008148 @default.
- W2087750045 hasConcept C41625074 @default.
- W2087750045 hasConcept C42360764 @default.
- W2087750045 hasConcept C43617362 @default.
- W2087750045 hasConcept C55493867 @default.
- W2087750045 hasConceptScore W2087750045C119857082 @default.
- W2087750045 hasConceptScore W2087750045C127413603 @default.
- W2087750045 hasConceptScore W2087750045C18411161 @default.
- W2087750045 hasConceptScore W2087750045C185592680 @default.
- W2087750045 hasConceptScore W2087750045C192562407 @default.
- W2087750045 hasConceptScore W2087750045C2776061190 @default.
- W2087750045 hasConceptScore W2087750045C41008148 @default.
- W2087750045 hasConceptScore W2087750045C41625074 @default.
- W2087750045 hasConceptScore W2087750045C42360764 @default.
- W2087750045 hasConceptScore W2087750045C43617362 @default.
- W2087750045 hasConceptScore W2087750045C55493867 @default.
- W2087750045 hasIssue "1-2" @default.
- W2087750045 hasLocation W20877500451 @default.
- W2087750045 hasOpenAccess W2087750045 @default.
- W2087750045 hasPrimaryLocation W20877500451 @default.
- W2087750045 hasRelatedWork W2094738866 @default.
- W2087750045 hasRelatedWork W2100496925 @default.
- W2087750045 hasRelatedWork W2364204291 @default.
- W2087750045 hasRelatedWork W2421136645 @default.
- W2087750045 hasRelatedWork W2461168814 @default.
- W2087750045 hasRelatedWork W2492885591 @default.
- W2087750045 hasRelatedWork W2761326918 @default.
- W2087750045 hasRelatedWork W2997016554 @default.
- W2087750045 hasRelatedWork W3093391459 @default.
- W2087750045 hasRelatedWork W3165475105 @default.
- W2087750045 hasVolume "143" @default.
- W2087750045 isParatext "false" @default.
- W2087750045 isRetracted "false" @default.
- W2087750045 magId "2087750045" @default.
- W2087750045 workType "article" @default.