期刊
CHEMSUSCHEM
卷 5, 期 9, 页码 1812-1819出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201200072
关键词
acidity; biphasic catalysis; heterogeneous catalysis; renewable resources; spectroscopy
资金
- CatchBio program [053.70.001]
- Smart Mix Program of the Netherlands Ministry of Economic Affairs
- Netherlands Ministry of Education, Culture and Science
Different acidic heterogeneous catalysts like alumina, aluminosilicate, zirconium phosphate, niobic acid, ion-exchange resin Amberlyst-15, and zeolite MOR have been studied in fructose dehydration to 5-hydroxymethylfurfural (HMF). The acidity of these materials was characterized using temperature-programmed desorption of NH3 and IR spectroscopy of adsorbed pyridine. The nature and strength of acid sites was shown to play a crucial role in the selectivity towards HMF. Bronsted acid sites in the case of zeolites and ion-exchange resin led to high selectivities in the dehydration of fructose with an increase in selectivity with the addition of an organic phase. Lewis acidity in the case of phosphate and oxides resulted in the intensive production of humins from fructose at the initial stages of the process, whereas organic phase addition did not affect selectivity.
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