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Carbon Deposition Assisting the Enhancement of Catalytic Activity with Time-on-Stream in the Dehydrogenation of Isobutane over NiO/Al2O3
https://tokushima-u.repo.nii.ac.jp/records/2009996
https://tokushima-u.repo.nii.ac.jp/records/2009996cf5c4f71-6309-46a0-ae50-09ebec04de41
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jcej_55_7_248.pdf (1.74 MB)
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| Item type | 文献 / Documents(1) | |||||||||||||||||||||||||||||||||||
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| 公開日 | 2022-09-06 | |||||||||||||||||||||||||||||||||||
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| アクセス権 | open access | |||||||||||||||||||||||||||||||||||
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| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||||||||||||||||||||||
| 資源タイプ | journal article | |||||||||||||||||||||||||||||||||||
| 出版社版DOI | ||||||||||||||||||||||||||||||||||||
| 関連識別子 | https://doi.org/10.1252/jcej.22we031 | |||||||||||||||||||||||||||||||||||
| 関連名称 | 10.1252/jcej.22we031 | |||||||||||||||||||||||||||||||||||
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| 出版タイプ | AM | |||||||||||||||||||||||||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||||||||||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||||||||||||||
| タイトル | Carbon Deposition Assisting the Enhancement of Catalytic Activity with Time-on-Stream in the Dehydrogenation of Isobutane over NiO/Al2O3 | |||||||||||||||||||||||||||||||||||
| タイトル別表記 | ||||||||||||||||||||||||||||||||||||
| その他のタイトル | Carbon Deposition Assisting the Enhancement of Catalytic Activity with Time-on-Stream in the Dehydrogenation of Isobutane on NiO/Al2O3 | |||||||||||||||||||||||||||||||||||
| 著者 |
杉山, 茂
× 杉山, 茂
WEKO
67
× ヨシダ, タシュウ
× 霜田, 直宏
WEKO
914
× 植木, 智之× カトウ, ユウキ
× ニノミヤ, ワタル
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| 内容記述 | In the transformation reaction of alkanes to alkenes via catalytic dehydrogenation, it is generally accepted that the so-called catalytic deactivation behavior will occur. This phenomenon causes a drastic reduction in activity with time-on-stream. It is understood that carbon deposition generated during the reaction then covers the surface of the catalyst, and this leads to a drastic decrease in activity. However, contrary to this common wisdom, our laboratory reported that the dehydrogenation of isobutane to isobutene on NiO/γ-Al2O3 within a specific range of NiO loading in the presence of CO2 actually improved the yield of isobutene with time-on-stream. Since few such cases have been reported, in this study, isobutane was dehydrogenated in the presence of CO2 using NiO/α-Al2O3 as the catalyst with 20% NiO loading and improvement was again observed. In order to investigate the cause of the improvement, both NiO/γ-Al2O3 and NiO/α-Al2O3 with 20% NiO loading were examined in detail following the reaction. According to TEM analysis, both catalysts were covered with a large amount of carbon deposition after the reaction, but there was a difference in the types. The carbon deposition on NiO/γ-Al2O3 had a fibrous nature while that on NiO/α-Al2O3 appeared to be a type of nanowire. Raman spectroscopy revealed that the carbonaceous crystal growth properties of two forms differed depending on the support. In particular, a catalytically active species of metallic nickel was formed in a high degree of dispersion in and on the above two forms of carbon deposition during the reaction, and this resulted in high activity even if the catalyst was covered with a carbon deposition. | |||||||||||||||||||||||||||||||||||
| キーワード | ||||||||||||||||||||||||||||||||||||
| 主題 | Dehydrogenation | |||||||||||||||||||||||||||||||||||
| キーワード | ||||||||||||||||||||||||||||||||||||
| 主題 | Isobutane | |||||||||||||||||||||||||||||||||||
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| 主題 | Nickel Oxide | |||||||||||||||||||||||||||||||||||
| キーワード | ||||||||||||||||||||||||||||||||||||
| 主題 | Catalyst Deactivation | |||||||||||||||||||||||||||||||||||
| キーワード | ||||||||||||||||||||||||||||||||||||
| 主題 | Carbon Deposition | |||||||||||||||||||||||||||||||||||
| 書誌情報 |
en : Journal of Chemical Engineering of Japan 巻 55, 号 7, p. 248-254, 発行日 2022-07-20 |
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| 収録物識別子タイプ | ISSN | |||||||||||||||||||||||||||||||||||
| 収録物識別子 | 00219592 | |||||||||||||||||||||||||||||||||||
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| 収録物識別子タイプ | NCID | |||||||||||||||||||||||||||||||||||
| 収録物識別子 | AA00709658 | |||||||||||||||||||||||||||||||||||
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| 出版者 | The Society of Chemical Engineers, Japan | |||||||||||||||||||||||||||||||||||
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| 識別子 | 385796 | |||||||||||||||||||||||||||||||||||
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| 言語 | eng | |||||||||||||||||||||||||||||||||||
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杉山, 茂, ヨシダ, タシュウ, 霜田, 直宏, 植木, 智之, カトウ, ユウキ, ニノミヤ, ワタル, 2022, Carbon Deposition Assisting the Enhancement of Catalytic Activity with Time-on-Stream in the Dehydrogenation of Isobutane over NiO/Al2O3: The Society of Chemical Engineers, Japan, 248–254 p.
