Author |
Rodrigues, Raphael
![]() Mandelli, Dalmo ![]() Goncalves, Norberto Sanches ![]() ![]() Pescarmona, Paolo P. ![]() Carvalho, Wagner A. ![]() |
Abstract | Niobium-aluminum-based catalysts were synthesized by a sol-gel process and successfully applied to the reaction of acetalization of acetone with glycerol yielding 2,2-dimethyl-1,3-dioxolane-4-methanol (solketal) and 2,2-dimethyl-1,3-dioxan-5-ol. The synthesis procedure was developed using high throughput techniques and the materials prepared with molar ratio1 Metal (1Nb:xAl): 100H(2)O: 1.5NH(4)OH (in which x =1, 0.6, 0.3, 0.1 and 0.05) were selected to be further investigated. The obtained series of mixed oxides displayed high catalytic activity reaching glycerol conversion up to 84%, with 98% of selectivity towards solketal. The physicochemical properties of the investigated catalysts were characterized by N-2-adorption/desorption, thermal analysis, X-rays diffraction, FTIR and Raman spectroscopy, and by adsorption of pyridine monitored by FT-IR spectroscopy and TGA. The catalysts are truly heterogeneous and can be reused in consecutive runs without loss of activity. (C) 2016 Elsevier B.V. All rights reserved. |
Keywords |
Niobium
Aluminum Acetalization Solketal Glycerol |
xmlui.dri2xhtml.METS-1.0.item-coverage | Amsterdam |
Language | English |
Sponsor |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) FWO START1 (KU Leuven) |
Grant number |
|
Date | 2016 |
Published in | Journal Of Molecular Catalysis A-Chemical. Amsterdam, v. 422, p. 122-130, 2016. |
ISSN | 1381-1169 (Sherpa/Romeo, impact factor) |
Publisher | Elsevier Science Bv |
Extent | 122-130 |
Origin |
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Access rights | Closed access |
Type | Article |
Web of Science ID | WOS:000384789200015 |
URI | https://repositorio.unifesp.br/handle/11600/57025 |
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