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    • Química Inorgánica, Cristalografía y Mineralografía - (QICM)
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    •   RIUMA Principal
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    • Química Inorgánica, Cristalografía y Mineralografía - (QICM)
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    Porous aluminosilicates as acid catalysts for glucose dehydration to 5-hydroxymethylfurfural

    • Autor
      Moreno Recio, Mercedes; Moreno-Tost, RamonAutoridad Universidad de Málaga; Merida-Robles, Josefa MariaAutoridad Universidad de Málaga; Santamaria-Gonzalez, JoseAutoridad Universidad de Málaga; Maireles-Torres, Pedro JesúsAutoridad Universidad de Málaga
    • Fecha
      2015-05-12
    • Palabras clave
      Catálisis heterogénea; Silicatos de aluminio
    • Resumen
      In the present work, the catalytic behavior of micro- and mesoporous aluminosilicates in glucose dehydration is compared. In this sense, different commercial zeolites (Beta, Y and ZSM-5, in their protonic form) and aluminum-doped mesoporous MCM-41 silica have been characterized by using different physico-chemical techniques and the dehydration of glucose has been studied by using bi-phasic systems, where the influence of experimental variables, such as nature of co-solvent, inorganic salt addition, catalyst loading and temperature and time reaction, has been optimized. Concerning the catalytic behavior, by using a biphasic water/MIBK as reaction medium and a 30 wt.% of the 10Al-MCM catalyst with respect to the substrate weight (glucose), 87 % of glucose conversion and 36 % of HMF yield were attained at 195ºC after 150 min of reaction time. However, a very positive effect was observed by using a sodium chloride aqueous solution. The large pore dimensions of aluminium doped MCM-41 silica and H-Beta catalysts together with their high acidity, with both Brönsted and Lewis centres, have led to very active acid catalysts in the dehydration of glucose to HMF. Thus, by using a biphasic water/MIBK solution, after addition of a 20 wt% NaCl, the catalytic activity is largely improved, attaining glucose conversion values higher than 94 % and 70 % of HMF yields, in a short reaction time (30 min). Moreover, no levulinic acid nor furfural were detected.
    • URI
      http://hdl.handle.net/10630/9758
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    ISGC2015_Mairelesetal.pdf (278.3Kb)
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    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA
    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA