01804nas a2200241   4500008004100000022001400041245008800055210006900143260007300212300001000285490000800295520097000303653001201273653001301285653001601298653001301314653002701327100001901354700001901373700001801392700003301410856011901443       2013                        eng d  a1387-181100aDehydration of fructose to 5-hydroxymethyl furfural over ordered AlSBA-15 catalysts0 aDehydration of fructose to 5hydroxymethyl furfural over ordered   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcNOV  a38-460 v1813 a<p>5-Hydroxymethyl furfural is an important platform chemical. It is successfully synthesized from renewable carbohydrates using mesoporous AlSBA-15 catalysts under biphasic conditions. Fine tuning of the catalyst acidity is important to drive the reaction to give good yields of furan compound. Al-SBA-15 catalysts with different Si/Al ratios were prepared and characterized by XRD, Al-27 MASNMR, SEM, TEM, N-2 sorption, ICP-OES and TPD of ammonia. Results show that part of aluminium is substituted into tetrahedral positions. The catalyst with lower acid site density but medium to strong acid strength favours selective formation of HMF. Under the optimized conditions, HMF selectivity was as high as 88% at 59 mol% conversion of fructose. Leaching of part of aluminium occurs under hydrothermal conditions, if solvent mixtures containing water are used, while activity can be retained if DMSO is used as solvent. (c) 2013 Elsevier Inc. All rights reserved.</p>10aAcidity10aAlSBA-1510adehydration10afructose10aHydroxymethyl furfural1 aLucas, Nishita1 aKokate, Ganesh1 aNagpure, Atul1 aChilukuri, Satyanarayana, V.  uhttps://library.ncl.res.in/content/dehydration-fructose-5-hydroxymethyl-furfural-over-ordered-alsba-15-catalysts-002147nas a2200265   4500008004100000022001400041245008300055210006900138260010100207300001200308490000800320520121000328653000601538653002001544653003001564653002901594653001601623653001301639100001901652700002601671700002201697700001901719700003301738856011001771       2014                        eng d  a0974-362600aNovel catalysts for valorization of biomass to value-added chemicals and fuels0 aNovel catalysts for valorization of biomass to valueadded chemic  aC V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIAbCatalysis Soc IndiacMAR  a403-4130 v1263 a<p>Key furan compounds such as 5-hydroxymethylfurfural (HMF), 2,5-furandicarboxylic acid (FDCA) and 2,5-dimethylfuran (DMF) were synthesized from renewable feedstocks. Dehydration of fructose was carried out in biphasic conditions employing several solid acid catalysts by targeting selective formation of HMF. Its selectivity is linearly dependent on total acidity clearly revealing that lower acidity favours selective formation of HMF. Oxidation and hydrogenolysis of HMF has been explored using 2 wt% Ru-K-OMS-2. The catalysts used for each transformation were subjected to detailed characterization using XRD, BET surface area, temperature-programmed desorption and transmission electron microscopy. The effect of various reaction parameters was also investigated for obtaining high yields of desired chemical intermediates. High FDCA yields of 93.4 mol% and 66 mol% were achieved in alkaline and base-free conditions, respectively. The 2 wt% Ru-K-OMS-2 is a versatile catalyst as it also catalyses HMF hydrogenolysis giving 33 mol% of DMF. Thus, utility of various novel materials as catalysts has been demonstrated in the multistep transformations of hexoses to furan-based fuels and chemicals.</p>10a210a5-dimethylfuran10a5-furan dicarboxylic acid10a5-hydroxymethyl furfural10adehydration10afructose1 aLucas, Nishita1 aKanna, Narasimha, Rao1 aNagpure, Atul, S.1 aKokate, Ganesh1 aChilukuri, Satyanarayana, V.  uhttps://library.ncl.res.in/content/novel-catalysts-valorization-biomass-value-added-chemicals-and-fuels-0