resumo
Micro/mesoporous chromium, aluminium-containing silicates of the type TUD-1 (Al-TUD-1, Cr-TUD-1, CrAl-TUD-1) and zeolite BEA, Cr-BEA, and related composites BEA/TUD-1 and Cr-BEA/TUD-1, were prepared, characterised, and tested as solid acids coupled with the ionic liquid (IL) 1-butyl-3-methylimidazolium chloride ([bmim] Cl) as solvent, in the transformation of D-glucose into 5-(hydroxymethyl)-2-furaldehyde (Hmf), at 120 degrees C. The chromium-containing catalytic systems lead to considerably higher Hmf yields in comparison to the related systems without chromium. The IL is a favourable solvent for this target reaction (in terms of Hmf yields reached) compared to water or dimethylsulfoxide. A detailed study on the stabilities of the nanoporous solid acids in the IL medium is presented.
palavras-chave
ACID-CATALYZED CONVERSION; FURANIC ALDEHYDES; METAL CHLORIDES; CELLULOSE; TUD-1; SACCHARIDES; ADSORPTION; CHEMICALS; AL-TUD-1; SOLVENTS
categoria
Chemistry
autores
Antunes, MM; Lima, S; Pillinger, M; Valente, AA
nossos autores
Anabela Tavares Aguiar Valente
Investigador Principal
Maria Margarida Feitor Pintão Moreno Antunes
Investigador Júnior
Martyn Pillinger
Investigador Principalagradecimentos
This work was partly funded by the Fundacao para a Ciencia e a Tecnologia (FCT; project POCTI/QUI/56112/2004), Programa Operacional Ciencia e Inovacao (POCI) 2010, Orcamento do Estado (OE), Fundo Europeu de Desenvolvimento Regional (FEDER). The authors are grateful to Marta A. C. Ferro for help with the TEM studies, and we acknowledge the Portuguese network of electron microscopy, the RNME, FCT Project REDE/1509/RME/2005. We thank the FCT for a PhD grant to M. M. A. (SFRH/BD/61648/2009) and a post-doctoral grant to S. L. (SRFH/BPD/23765/2005).