Kubo, Miwako ; Mano, Ryota ; Kojima, Misako ; Naniwa, Kenichi ; Daiko, Yusuke ; Honda, Sawao ; Ionescu, Emanuel ; Bernard, Samuel ; Riedel, Ralf ; Iwamoto, Yuji (2020)
Hydrogen Selective SiCH Inorganic–Organic Hybrid/γ-Al2O3 Composite Membranes.
In: Membranes, 10 (10)
doi: 10.3390/membranes10100258
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Solar hydrogen production via the photoelectrochemical water-splitting reaction is attractive as one of the environmental-friendly approaches for producing H2. Since the reaction simultaneously generates H2 and O2, this method requires immediate H2 recovery from the syngas including O2 under high-humidity conditions around 50 °C. In this study, a supported mesoporous gamma-Al2O3 membrane was modified with allyl-hydrido-polycarbosilane as a preceramic polymer and subsequently heat-treated in Ar to deliver a ternary SiCH organic-inorganic hybrid/gamma-Al2O3 composite membrane. Relations between the polymer/hybrid conversion temperature, hydrophobicity, and H2 affinity of the polymer-derived SiCH hybrids were studied to functionalize the composite membranes as H2-selective under saturated water vapor partial pressure at 50 °C. As a result, the composite membranes synthesized at temperatures as low as 300-500 °C showed a H2 permeance of 1.0-4.3 * 10-7 mol m-2 s-1 Pa-1 with a H2/N2 selectivity of 6.0-11.3 under a mixed H2-N2 (2:1) feed gas flow. Further modification by the 120 °C-melt impregnation of low molecular weight polycarbosilane successfully improved the H2-permselectivity of the 500 °C-synthesized composite membrane by maintaining the H2 permeance combined with improved H2/N2 selectivity as 3.5 * 10-7 mol m-2 s-1 Pa-1 with 36. These results revealed a great potential of the polymer-derived SiCH hybrids as novel hydrophobic membranes for purification of solar hydrogen.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Kubo, Miwako ; Mano, Ryota ; Kojima, Misako ; Naniwa, Kenichi ; Daiko, Yusuke ; Honda, Sawao ; Ionescu, Emanuel ; Bernard, Samuel ; Riedel, Ralf ; Iwamoto, Yuji |
| Art des Eintrags: | Bibliographie |
| Titel: | Hydrogen Selective SiCH Inorganic–Organic Hybrid/γ-Al2O3 Composite Membranes |
| Sprache: | Englisch |
| Publikationsjahr: | 25 September 2020 |
| Ort: | Basel |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Membranes |
| Jahrgang/Volume einer Zeitschrift: | 10 |
| (Heft-)Nummer: | 10 |
| Kollation: | 19 Seiten |
| DOI: | 10.3390/membranes10100258 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Solar hydrogen production via the photoelectrochemical water-splitting reaction is attractive as one of the environmental-friendly approaches for producing H2. Since the reaction simultaneously generates H2 and O2, this method requires immediate H2 recovery from the syngas including O2 under high-humidity conditions around 50 °C. In this study, a supported mesoporous gamma-Al2O3 membrane was modified with allyl-hydrido-polycarbosilane as a preceramic polymer and subsequently heat-treated in Ar to deliver a ternary SiCH organic-inorganic hybrid/gamma-Al2O3 composite membrane. Relations between the polymer/hybrid conversion temperature, hydrophobicity, and H2 affinity of the polymer-derived SiCH hybrids were studied to functionalize the composite membranes as H2-selective under saturated water vapor partial pressure at 50 °C. As a result, the composite membranes synthesized at temperatures as low as 300-500 °C showed a H2 permeance of 1.0-4.3 * 10-7 mol m-2 s-1 Pa-1 with a H2/N2 selectivity of 6.0-11.3 under a mixed H2-N2 (2:1) feed gas flow. Further modification by the 120 °C-melt impregnation of low molecular weight polycarbosilane successfully improved the H2-permselectivity of the 500 °C-synthesized composite membrane by maintaining the H2 permeance combined with improved H2/N2 selectivity as 3.5 * 10-7 mol m-2 s-1 Pa-1 with 36. These results revealed a great potential of the polymer-derived SiCH hybrids as novel hydrophobic membranes for purification of solar hydrogen. |
| Freie Schlagworte: | Research Project for Future Development: Artificial Photosynthetic Chemical Process (ARPChem), (METI/NEDO, Japan: 2012-2022), New Energy and Industrial Technology Development Organization, allyl-hydrido-polycarbosilane (AHPCS); hydrogen affinity; hydrogen separation; hydrophobicity; membrane; organic-inorganic hybrid; polymer-derived ceramics (PDCs) |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 20 Okt 2020 05:29 |
| Letzte Änderung: | 04 Dez 2023 13:05 |
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Verfügbare Versionen dieses Eintrags
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Hydrogen Selective SiCH Inorganic−Organic Hybrid/γ-Al₂O₃ Composite Membranes. (deposited 01 Dez 2023 13:56)
- Hydrogen Selective SiCH Inorganic–Organic Hybrid/γ-Al2O3 Composite Membranes. (deposited 20 Okt 2020 05:29) [Gegenwärtig angezeigt]
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