NDLI: Supercritical fluid deposition of Ru nanoparticles onto SiO<sub>2</sub> SBA-15 as a sustainable method to prepare selective hydrogenation catalysts

Content Provider	Royal Society of Chemistry (RSC)
Author	Pando, C. Renuncio, J. A. R. Cabañas, A. Morère, J. Torralvo, M. J.
Copyright Year	2015
Abstract	Ru nanoparticles were successfully deposited onto mesoporous SiO2 SBA-15 using supercritical CO2 (scCO2). The use of scCO2 favoured the metal dispersion and Ru nanoparticles uniformly distributed throughout the support were obtained. Different precursors and methodologies were employed: impregnation with Ru(tmhd)2(COD) in scCO2 at 80 °C and 13.5 and 19.3 MPa and further reduction in H2/N2 at 400 °C at low pressure, reactive deposition of Ru(tmhd)2(COD) with H2 in scCO2 at 150 °C and reactive deposition of RuCl3·xH2O with ethanol in scCO2 at 150 and 200 °C. The size of the particles was limited in one dimension by the pore size of the support. The metal loading varied with the methodology and experimental conditions from 0.9 to 7.4% Ru mol. These materials exhibited remarkable catalytic activity. The Ru/SiO2 SBA-15 materials prepared by reactive deposition with H2 in scCO2 were selective catalysts for the hydrogenation reactions of benzene and limonene, allowing the production of partly hydrogenated hydrocarbons that may serve as building blocks for more complex chemicals. scCO2 is shown to be a green solvent that allows the preparation of efficient heterogeneous catalysts to design sustainable processes. Furthermore, in the hydrogenation of limonene, scCO2 was also used as the solvent.
Starting Page	38880
Ending Page	38891
Page Count	12
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	5
Issue Number	49
Journal	RSC Advances
DOI	10.1039/c5ra04969e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Mesoporous material Supercritical carbon dioxide Ethanol Benzene Limonene Green chemistry Hydrogenation Solvent London dispersion force
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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