期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 4, 期 5, 页码 1357-1368出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cy00129j
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资金
- Spanish Ministerio de Economia y Competitividad [CTQ-2012-38204-C03-03]
- Gobierno Vasco (Programa de Formacion de Personal Investigador del Departamento de Educacion, Universidades e Investigacion)
The current furfural production yield is low due to the use of non-selective homogeneous catalysts and expensive separation. In this work, partially hydroxylated MgF2 catalysts, synthesized using different water contents, were screened during xylose dehydration in water-toluene at 160 degrees C. The different Lewis/Bronsted ratios on the MgF2 catalysts showed that under-coordinated Mg can isomerize xylose to xylulose, whilst the surface OH-groups were responsible for the dehydration reactions. The presence of glucose as a co-carbohydrate reduced the furfural selectivity from 86 to 81%, whilst it also led to high 5-hydroxymethylfurfural selectivity. The tests catalyzed by MgF2 in combination with simultaneous N-2-stripping showed that a furfural selectivity of 87% could be achieved using low xylose loadings. Moreover, the catalysts regenerated by H2O2 showed high activity during the dehydration tests in water-toluene at 160 degrees C.
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