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Bimodal cesium hydrogen salts of 12-tungstosilicic acid, CsxH4-xSiW12O40, as highly active solid acid catalysts for transesterification of glycerol tributyrate with methanol
| Title: | Bimodal cesium hydrogen salts of 12-tungstosilicic acid, CsxH4-xSiW12O40, as highly active solid acid catalysts for transesterification of glycerol tributyrate with methanol |
| Authors: | Iwase, Yukari Browse this author | | Sano, Shogo Browse this author | | Mahardiani, Lina Browse this author | | Abe, Ryu Browse this author →KAKEN DB | | Kamiya, Yuichi Browse this author →KAKEN DB |
| Keywords: | Heteropolyacid | | Mesopore | | Bimodal | | Biodiesel | | Solid acid | | Dissolution |
| Issue Date: | Oct-2014 |
| Publisher: | Elsevier |
| Journal Title: | Journal of Catalysis |
| Volume: | 318 |
| Start Page: | 34 |
| End Page: | 42 |
| Publisher DOI: | 10.1016/j.jcat.2014.07.008 |
| Abstract: | Bimodal CsxH4-x[SiW12O40] (Csx-bimodal) with mesopores interconnected with micropores were synthesized from microporous CsxH4-x[SiW12O40 (Csx-micro) with x = 1.0-2.5, which were prepared in advance by titrating an aqueous solution of H-4[SiW12O40] with an aqueous solution of Cs2CO3, followed by treatment in refluxing ethanol to mainly dissolve the H-4[SiW12O40] in the particles. Mesopore size distributions and their pore volumes changed depending on x in Csx-micro. Microporous Cs2.5-micro transformed into bimodal Cs2.5-bimodal with mesopores having average diameters of 3.7 nm and large mesopore volumes. Although Cs2.5-bimodal exhibited only low catalytic activity for the decomposition of isopropyl acetate, post-treatment in H2SO4 enhanced the catalytic activity due to substitution of the Cs' ions on the surface with H+center dot H2SO4-treated Csx-bimodal showed high activity toward transesterification of glyceryl tributyrate with methanol due to its strong acid strength and mesoporosity. |
| Rights: | (C) 2014 Elsevier Inc. All rights reserved. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/57501 |
| 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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