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Cs-Beta with an Al-rich composition as a highly active base catalyst for Knoevenagel condensation
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| Title: | Cs-Beta with an Al-rich composition as a highly active base catalyst for Knoevenagel condensation |
| Authors: | Otomo, Ryoichi Browse this author →KAKEN DB | | Osuga, Ryota Browse this author →KAKEN DB | | Kondo, Junko N. Browse this author →KAKEN DB | | Kamiya, Yuichi Browse this author →KAKEN DB | | Yokoi, Toshiyuki Browse this author →KAKEN DB |
| Keywords: | Beta | | Ion exchange | | Knoevenagel condensation | | OSDA-free | | Solid base |
| Issue Date: | 5-Apr-2019 |
| Publisher: | Elsevier |
| Journal Title: | Applied catalysis A-general |
| Volume: | 575 |
| Start Page: | 20 |
| End Page: | 24 |
| Publisher DOI: | 10.1016/j.apcata.2019.02.014 |
| Abstract: | Ion-exchange of an Al-rich zeolite beta, synthesized by organic structure-directing agent-free method (Beta-OF), was studied for application as a base catalyst. While the as-synthesized Beta-OF in Na-form itself had base sites and showed moderate catalytic activity for Knoevenagel condensation, the ion-exchange with Cs+ improved the catalytic activity. For Knoevenagel condensation of benzaldehyde with ethyl acetoacetate, the catalytic activity of Beta-OF ion-exchanged with Cs+ largely surpassed that of the conventional zeolite beta with less Al content. CO2-TPD and IR observation with chloroform as a probe molecule revealed that the Cs-exchanged Beta-OF had strong base sites comparable to Cs-exchanged Y zeolite. Base strength of Beta-OF was stronger than that expected by Sanderson's theory. A local high density of Al atoms in the framework of Beta-OF resulted in the unexpected base property and high catalytic activity. |
| Rights: | © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | https://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/80825 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 大友 亮一
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