-5-Hydroxymethylfurfural (HMF) is a key renewable platform compound for production of fuels and chemical intermediates. The production of 5-hydroxymethylfurfural (HMF) from fructose dehydration was studied using H 3 PO 4 as catalyst, in organic/water system with different solvents (acetone, 2-butanol and ethyl ether). The effect of fructose concentration, temperature and acid concentration was investigated in acetone/water medium. The increase in fructose concentration favors the formation of condensation products and rehydration products are favored at high acid concentration. The solvents exhibited similar performance when the volume ratio of organic to aqueous phase was 1:1, but when this ratio increases to 2:1, the HMF yield obtained with ether was much lower. NaCl addition to the aqueous phase promoted the extraction of HMF to the organic phase, with an HMF yield of 80% in the case of 2:1 acetone/water medium.
RESUMO-Este estudo teve como objetivo sintetizar e caracterizar catalisadores de níquel suportados em nióbia e alumina (15% Ni/ x% Nb2O5/ Al2O3 onde x = 0, 5, 10 e 20) pelo método de co-precipitação para a reação de reforma a vapor de metano. Os catalisadores foram caracterizados por difração de raios X, fisissorção de N2 e redução à temperatura programada. No teste reacional, observou-se que os catalisadores dopados com nióbia são uma alternativa promissora, pois apresentaram maior conversão de metano.
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