Catalysis Letters

, Volume 108, Issue 3–4, pp 179–186

Liquid-phase Dehydration of d-xylose over Microporous and Mesoporous Niobium Silicates

  • Ana S. Dias
  • Sérgio Lima
  • Paula Brandão
  • Martyn Pillinger
  • João Rocha
  • Anabela A. Valente


Microporous AM-11 crystalline niobium silicates were studied as solid acid catalysts for the dehydration of xylose in a water-toluene solvent mixture at 140–180 °C. After 6 h at 160 °C, xylose conversions of up to 90% and furfural yields of up to 50% were achieved, and the catalysts could be reused without loss of activity or selectivity. The calcined AM-11 catalysts gave higher furfural yields than HY zeolite and mordenite, under identical reaction conditions. Ordered mesoporous MCM-41-type niobium silicates with Si/Nb molar ratios of either 25 or 50 were also found to be recyclable catalysts for xylose dehydration, and gave furfural yields consistently in the range of 34–39% (after 6 h reaction at 160 °C).


xylose furfural dehydration acid catalysis niobium silicates microporous mesoporous 


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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Ana S. Dias
    • 1
  • Sérgio Lima
    • 1
  • Paula Brandão
    • 1
  • Martyn Pillinger
    • 1
  • João Rocha
    • 1
  • Anabela A. Valente
    • 1
  1. 1.Department of ChemistryCICECO, University of AveiroAveiroPortugal

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