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Strong Brønsted acid-modified chromium oxide as an efficient catalyst for the selective oxidation of methacrolein to methacrylic acid
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| Title: | Strong Brønsted acid-modified chromium oxide as an efficient catalyst for the selective oxidation of methacrolein to methacrylic acid |
| Authors: | Yasuda, Shuhei Browse this author | | Iwakura, Atsuki Browse this author | | Hirata, Jun Browse this author | | Kanno, Mitsuru Browse this author | | Ninomiya, Wataru Browse this author | | Otomo, Ryoichi Browse this author →KAKEN DB | | Kamiya, Yuichi Browse this author →KAKEN DB |
| Keywords: | Methacrolein oxidation | | Acid modification | | Chromium oxide | | Keggin-type heteropoly acid | | Gas phase oxidation |
| Issue Date: | 10-May-2019 |
| Publisher: | Elsevier |
| Journal Title: | Catalysis communications |
| Volume: | 125 |
| Start Page: | 43 |
| End Page: | 47 |
| Publisher DOI: | 10.1016/j.catcom.2019.03.020 |
| Abstract: | Gas–phase oxidation of methacrolein to methacrylic acid was carried out over an acid-modified Cr2O3/SiO2 catalyst. While only total oxidation occurred over bare Cr2O3/SiO2, the acid-modified Cr2O3/SiO2 showed catalytic activity for the formation of methacrylic acid. In particular, H3PW12O40 strong Brønsted acid was the most effective modifier for improving both activity and selectivity. The interface between Cr2O3 and H3PW12O40 particles on SiO2 appears to be responsible for the formation of active sites for the selective formation of methacrylic acid. The strong Brønsted acid would help the activation of methacrolein through rendering it more electrophilic, which is a key step for the formation of methacrylic acid over the present catalyst. |
| 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/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/81126 |
| 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: 神谷 裕一
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