Bimodal cesium hydrogen salts of 12-tungstosilicic acid, CsxH4-xSiW12O40, as highly active solid acid catalysts for transesterification of glycerol tributyrate with methanol

Iwase, Yukari; Sano, Shogo; Mahardiani, Lina; Abe, Ryu; Kamiya, Yuichi

Bimodal cesium hydrogen salts of 12-tungstosilicic acid, CsxH4-xSiW12O40, as highly active solid acid catalysts for transesterification of glycerol tributyrate with methanol

Iwase, Yukari; Sano, Shogo; Mahardiani, Lina et al.

Journal of Catalysis, 2014, 318, 34-42

Permalink : https://hdl.handle.net/2115/57501

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アクセス権	open access
URI	https://hdl.handle.net/2115/57501
タイトル	Bimodal cesium hydrogen salts of 12-tungstosilicic acid, CsxH4-xSiW12O40, as highly active solid acid catalysts for transesterification of glycerol tributyrate with methanol
著者	Iwase, Yukari ; Sano, Shogo ; Mahardiani, Lina ; Abe, Ryu ; Kamiya, Yuichi
著者名 Iwase, Yukari
著者名 Sano, Shogo
著者名 Mahardiani, Lina
e-Rad_Researcher 60356376 著者名 Abe, Ryu
e-Rad_Researcher 10374638 著者名 Kamiya, Yuichi
言語	英語
キーワード	Heteropolyacid
	Mesopore
	Bimodal
	Biodiesel
	Solid acid
	Dissolution
発行日	2014-10
出版者	Elsevier
収録物名	Journal of Catalysis
巻(号)	318
ページ	34-42
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	(C) 2014 Elsevier Inc. All rights reserved.
PISSN	0021-9517
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.jcat.2014.07.008