کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
51276 | 46837 | 2009 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Enhanced production of hydroxymethylfurfural from fructose with solid acid catalysts by simple water removal methods Enhanced production of hydroxymethylfurfural from fructose with solid acid catalysts by simple water removal methods](/preview/png/51276.png)
This paper demonstrates two simple ways to increase 5-hydroxymethylfurfural (HMF) yield (selectivity) in fructose dehydration with various solid acid catalysts. One is a water removal from the reaction mixture by a mild evacuation at 0.97 × 105 Pa; it increases HMF yield for various catalysts (heteropoly acid, zeolite, and acidic resin). The removal of water suppresses two undesired reactions: the hydrolysis of HMF to levulinic acid and the reaction of partially dehydrated intermediates to condensation products. The other method is a decrease in the particle (bead) size of the resin (Amberlyst-15). The crushed and sieved Amberlyst-15 powder in a size of 0.15–0.053 mm shows 100% HMF yield at high fructose concentration (50 wt.% in DMSO), which is to our knowledge the highest yield to date. Near-infrared spectroscopic characterization of adsorbed water suggests that the enhanced yield can be caused by an improved removal of adsorbed water in a small-size resin particle.
Journal: Catalysis Communications - Volume 10, Issue 14, 25 August 2009, Pages 1849–1853