Next Article in Journal
Mixed-Oxide Catalysts with Spinel Structure for the Valorization of Biomass: The Chemical-Loop Reforming of Bioethanol
Next Article in Special Issue
Preparation and Application of Biochar-Based Catalysts for Biofuel Production
Previous Article in Journal
Constructing A Rational Kinetic Model of the Selective Propane Oxidation Over A Mixed Metal Oxide Catalyst
Previous Article in Special Issue
Acid–Base Bifunctional Hf Nanohybrids Enable High Selectivity in the Catalytic Conversion of Ethyl Levulinate to γ-Valerolactone
Article Menu
Issue 8 (August) cover image

Export Article

Open AccessArticle
Catalysts 2018, 8(8), 331; https://doi.org/10.3390/catal8080331

Ru-(Mn-M)OX Solid Base Catalysts for the Upgrading of Xylitol to Glycols in Water

1
Institut de recherches sur la catalyse et l’environnement de Lyon, University of Lyon, Univ. Claude Bernard Lyon 1, CNRS, IRCELYON, UMR5256, 2 Avenue Albert Einstein, 69626 Villeurbanne, France
2
IFP Energies Nouvelles, Rond-Point de l’Echangeur de Solaize, BP 3, 69360 Solaize, France
*
Author to whom correspondence should be addressed.
Received: 26 July 2018 / Revised: 10 August 2018 / Accepted: 11 August 2018 / Published: 14 August 2018
(This article belongs to the Special Issue Solid Catalysts for the Upgrading of Renewable Sources)
Full-Text   |   PDF [5280 KB, uploaded 14 August 2018]   |  

Abstract

A series of Ru-(Mn-M)OX catalysts (M: Al, Ti, Zr, Zn) prepared by co-precipitation were investigated in the hydrogenolysis of xylitol in water to ethylene glycol, propylene glycol and glycerol at 200 °C and 60 bar of H2. The catalyst promoted with Al, Ru-(Mn-Al)OX, showed superior activity (57 h−1) and a high global selectivity to glycols and glycerol of 58% at 80% xylitol conversion. In comparison, the catalyst prepared by loading Ru on (Mn-Al)OX, Ru/(Mn-Al)OX was more active (111 h−1) but less selective (37%) than Ru-(Mn-Al)OX. Characterization of these catalysts by XRD, BET, CO2-TPD, NH3-TPD and TEM showed that Ru/(Mn-Al)OX contained highly dispersed and uniformly distributed Ru particles and fewer basic sites, which favored decarbonylation, epimerization and cascade decarbonylation reactions instead of retro-aldol reactions producing glycols. The hydrothermal stability of Ru-(Mn-Al)OX was improved by decreasing the xylitol/catalyst ratio, which decreased the formation of carboxylic acids and enabled recycling of the catalyst, with a very low deactivation. View Full-Text
Keywords: hydrogenolysis; ethylene glycol; propylene glycol; xylitol; solid base catalyst; aqueous phase; alditol hydrogenolysis; ethylene glycol; propylene glycol; xylitol; solid base catalyst; aqueous phase; alditol
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Rivière, M.; Perret, N.; Delcroix, D.; Cabiac, A.; Pinel, C.; Besson, M. Ru-(Mn-M)OX Solid Base Catalysts for the Upgrading of Xylitol to Glycols in Water. Catalysts 2018, 8, 331.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Catalysts EISSN 2073-4344 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top