Aplicação de óxidos de metais como catalisadores heterogêneos na isomerização da glicose em meio aquoso
DOI:
https://doi.org/10.17648/diversitas-journal-v6i1-1600Abstract
ABSTRACT: Currently, the use of renewable and sustainablesources to produce energy and chemicalsassociatedwiththedevelopment of heterogeneous catalystsis a promisingstrategy, as theyhavetheadvantage of beingrecovered and reused, reducingcosts and contamination. In thissense, biomassderivedsugars, suchas glucose and fructose, canbeused as buildingblocks to producechemical inputs, whichcancomplementorreplace some petrochemicalderivatives and presentgreat industrial potential and high addedvalue. Thus, theisomerization of glucose to fructose in aqueousmediumwasstudiedusing metal oxides SnO2, MoO3 and SnO2/MoO3compared to thereactionwithoutcatalyst. The catalyticactivitieswereevaluated in terms of conversion and yield to fructoseattemperatures of 50 and 70ºC withreaction times of 0,25 to 6h.The catalystswerecharacterizedusingtechniquessuch as infraredabsorptionspectroscopy (FTIR), thermogravimetric analysis (TG / DTA) and X-ray diffraction (XRD). The resultsdemonstratethatthemainfactorthatinfluencesthe glucose conversion are theacidic sites present in thecatalytic systems. Withthisstudy it canbeseenthatmolybdenum oxide and mixed oxide led to high conversions, howevermolybdenum oxide showedbetterresults in terms of fructose yield. In addition, otherminorityproductssuch as glyceraldehyde and pyruvaldehydehavebeenidentified and quantified.
KEYWORDS:Biomass. Catalysis. Monosaccharides.
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Copyright (c) 2021 Evellyn Patricia Santos da Silva, Thatiane Veríssimo dos Santos, Simoni Margareti Plentz Meneghetti
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