| アイテムタイプ |
文献 / Documents(1) |
| 公開日 |
2018-02-09 |
| アクセス権 |
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アクセス権 |
open access |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版社版DOI |
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関連識別子 |
https://doi.org/10.1252/jcej.16we380 |
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関連名称 |
10.1252/jcej.16we380 |
| 出版タイプ |
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出版タイプ |
AM |
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出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| タイトル |
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タイトル |
Catalyst deactivation of a silica-supported bismuth-molybdenum complex oxide and the related complex oxides for the oxidative dehydrogenation of 1-butene to 1,3-butadiene |
| 著者 |
杉山, 茂
ナガイ, コウタ
ナカオ, ユキ
馬場, 雄三
加藤, 雅裕
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| 抄録 |
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内容記述 |
This study was an examination of the catalyst deactivation of a silica-supported bismuth-molybdenum complex oxide, and that of catalysts used in the absence of bismuth, for the oxidative dehydrogenation of 1-butene. Due to the detection of deactivation, the molar ratio of 1-butene against oxygen in the reactant gas was adjusted to a ratio similar to that used in industrial processes where reaction temperatures average 100 K higher. Regardless of the presence or absence of bismuth in the catalysts, the conversion of 1-butene was decreased by 6 h on-stream. Both the progress of the coking from the inlet to the outlet of the catalyst and the reduction of molybdenum in the catalysts directly contributed to the deactivation. X-ray photoelectron spectrometry revealed that a greater reduction of molybdenum in the near-surface region and a smaller partial pressure of oxygen (P(O2)) in the reactant gas, although the molybdenum on the surface was not reduced at all. This indicated that the lattice oxygen was pumped from the near-surface region to the surface during the reaction and the oxygen-poor conditions of the near-surface region both in the gas and catalyst phases were formed at a smaller P(O2), which resulted in the enhancements of both the reduction of molybdenum and that of coking. Based on the thermogravimetric analysis, the silica-supported bismuth-molybdenum complex oxide used at P(O2) = 4.1 kPa (color of the catalyst = black) was increased in weight while that used at P(O2) = 16.4 kPa (color of the catalyst = gray) showed a weight decrease, which indicated that the weight decrease caused by the reduction in molybdenum in the near-surface region used at 4.1 kPa was greater than the weight increase from the coking. It was concluded that the reduction in molybdenum followed by the coking on the catalyst surface were the main factors in the catalyst deactivation. |
| キーワード |
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主題 |
Catalyst deactivation |
| キーワード |
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主題 |
Bismuth-molybdenum oxide |
| キーワード |
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主題 |
Oxidative dehydrogenation |
| キーワード |
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主題 |
1-Butene |
| キーワード |
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主題 |
1,3-Butadiene |
| 書誌情報 |
en : Journal of Chemical Engineering of Japan
巻 50,
号 8,
p. 641-647,
発行日 2017-08-20
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| 収録物ID |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
00219592 |
| 収録物ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA00709658 |
| 収録物ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA12022538 |
| 出版者 |
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出版者 |
The Society of Chemical Engineers, Japan |
| 権利情報 |
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権利情報 |
Copyright © 2017 The Society of Chemical Engineers, Japan |
| EID |
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識別子 |
322946 |
| 言語 |
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言語 |
eng |
jcej_50_8_641.pdf (803 KB)
