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Tytuł:
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Development of CVD Silica Membranes Having High Hydrogen Permeance and Steam Durability and a Membrane Reactor for a Water Gas Shift Reaction.
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Autorzy:
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Nishida R; Inorganic Membranes Research Center, Research Institute of Innovative Technology for the Earth (RITE), Kyoto 619-0237, Japan. .
Tago T; Inorganic Membranes Research Center, Research Institute of Innovative Technology for the Earth (RITE), Kyoto 619-0237, Japan. .
Saitoh T; Inorganic Membranes Research Center, Research Institute of Innovative Technology for the Earth (RITE), Kyoto 619-0237, Japan. .
Seshimo M; Inorganic Membranes Research Center, Research Institute of Innovative Technology for the Earth (RITE), Kyoto 619-0237, Japan. .
Nakao SI; Inorganic Membranes Research Center, Research Institute of Innovative Technology for the Earth (RITE), Kyoto 619-0237, Japan. .
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Źródło:
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Membranes [Membranes (Basel)] 2019 Oct 30; Vol. 9 (11). Date of Electronic Publication: 2019 Oct 30.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: Basel, Switzerland : MDPI Publishing
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Grant Information:
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P16003 New Energy and Industrial Technology Development Organization
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Contributed Indexing:
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Keywords: amorphous silica membrane; counter-diffusion CVD; hydrogen; membrane reactor; water gas shift reaction
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Entry Date(s):
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Date Created: 20191102 Latest Revision: 20200928
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Update Code:
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20240104
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PubMed Central ID:
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PMC6918252
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DOI:
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10.3390/membranes9110140
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PMID:
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31671562
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Water gas shift reaction of carbon monoxide (CO) with membrane reactors should be a promising method for hydrogen mass-production because of its high CO conversion, high hydrogen purity and low carbon dioxide emission. For developing such membrane reactors, we need hydrogen permselective membranes with high hydrogen permeance with order of 10 -6 mol m -2 s -1 Pa -1 at 573 K and high steam durability. In this study, we have optimized the kind of substrates, precursors, vapor concentration, and chemical vapor deposition (CVD) time using the counter-diffusion CVD method for developing such membranes. The developed membrane prepared from hexamethyldisiloxane has a hydrogen permeance of 1.29 × 10 -6 mol m -2 s -1 Pa -1 at 573 K and high steam durability. We also conducted water gas shift reactions with membrane reactors installed the developed silica membranes. The results indicated that reactions proceed efficiently with the conversion around 95-97%, hydrogen purity around 94%, and hydrogen recovery around 60% at space velocity (SV) 7000.
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