| アイテムタイプ |
文献 / Documents(1) |
| 公開日 |
2019-10-18 |
| 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/10.3390/catal9080638 |
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関連名称 |
10.3390/catal9080638 |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| タイトル |
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タイトル |
Gas-Phase Epoxidation of Propylene to Propylene Oxide on a Supported Catalyst Modified with Various Dopants |
| 著者 |
杉山, 茂
サクワ, ヤスヒロ
オギノ, トモヤス
サカモト, ナオタカ
霜田, 直宏
加藤, 雅裕
キムラ, ノブヒロ
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| 抄録 |
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内容記述 |
In the present study, the production of propylene oxide (PO) from propylene via gas-phase epoxidation was investigated using various catalysts. Although Ag is known to be a highly active catalyst for the epoxidation of ethylene, it was not active in the present reaction. Both Al and Ti showed high levels of activity, however, which resulted in confusion. The present study was conducted to solve such confusion. Although the employment of MCM-41 modified with Ti and/or Al was reported as an active catalyst for epoxidation, the combination resulted in the formation of PO at a less than 0.1% yield. Since this research revealed that the acidic catalyst seemed favorable for the formation of PO, versions of ZSM-5 that were both undoped and doped with Na, Ti, and Ag were used as catalysts. In these cases, small improvements of 0.67% and 0.57% were achieved in the PO yield on H‒ZSM-5 and Ti‒ZSM-5, respectively. Based on the results of the Ti-dopant and acidic catalysts, Ag metal doped on carbonate species with a smaller surface area was used as a catalyst. As reported, Ag‒Na/CaCO3 showed a greater yield of PO at 1.29%. Furthermore, the use of SrCO3 for CaCO3 resulted in a further improvement in the PO yield to 2.17%. An experiment using CO2 and NH3 pulse together with SEM and TEM examinations for Ag‒Na/CaCO3 revealed that the greatest activity was the result of the greater particle size of metallic Ag rather than the acid‒base properties of the catalysts. |
| キーワード |
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主題 |
epoxidation |
| キーワード |
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主題 |
propylene |
| キーワード |
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主題 |
propylene oxide |
| キーワード |
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主題 |
Ag |
| キーワード |
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主題 |
alkaline carbonates |
| 書誌情報 |
en : Catalysts
巻 9,
号 8,
p. 638,
発行日 2019-07-26
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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 |
20734344 |
| 出版者 |
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出版者 |
MDPI |
| 権利情報 |
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権利情報 |
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
| EID |
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識別子 |
353607 |
| 言語 |
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言語 |
eng |
catal_9_8_638.pdf (626 KB)
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