Kubo, Miwako ; Mano, Ryota ; Kojima, Misako ; Naniwa, Kenichi ; Daiko, Yusuke ; Honda, Sawao ; Ionescu, Emanuel ; Bernard, Samuel ; Riedel, Ralf ; Iwamoto, Yuji (2023)
Hydrogen Selective SiCH Inorganic−Organic Hybrid/γ-Al₂O₃ Composite Membranes.
In: Membranes, 2020, 10 (10)
doi: 10.26083/tuprints-00015972
Artikel, Zweitveröffentlichung, Verlagsversion
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
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 γ-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/γ-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: | 2023 |
| 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: | Zweitveröffentlichung |
| Titel: | Hydrogen Selective SiCH Inorganic−Organic Hybrid/γ-Al₂O₃ Composite Membranes |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Dezember 2023 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2020 |
| Ort der Erstveröffentlichung: | Basel |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Membranes |
| Jahrgang/Volume einer Zeitschrift: | 10 |
| (Heft-)Nummer: | 10 |
| Kollation: | 19 Seiten |
| DOI: | 10.26083/tuprints-00015972 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/15972 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| 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 γ-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/γ-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: | allyl-hydrido-polycarbosilane (AHPCS), organic–inorganic hybrid, hydrophobicity, membrane, hydrogen separation, hydrogen affinity, polymer-derived ceramics (PDCs) |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-159722 |
| Zusätzliche Informationen: | This article belongs to the Special Issue Organic–Inorganic Hybrid Membranes for Separation and Purification Applications |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| 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: | 01 Dez 2023 13:56 |
| Letzte Änderung: | 04 Dez 2023 13:05 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Hydrogen Selective SiCH Inorganic−Organic Hybrid/γ-Al₂O₃ Composite Membranes. (deposited 01 Dez 2023 13:56) [Gegenwärtig angezeigt]
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