Chemical transformations of glucose to value added products using Cu-based catalytic systems

Abstract

Cu nanoparticles have been supported by two types of aluminosilicate materials with and without Zn in their composition in view of their application in the microwave-assisted conversion of glucose to valuable products via tandem formic acid-promoted dehydration (to 5-hydroxymethylfurfural--HMF) and further selective hydrogenation to 5-methylfurfuryl alcohol (MFA). Results show that interesting selectivities (up to 60% to MFA or HMF) could be achieved after short times of reaction (typically 2-30 min) using Cu-containing nanomaterials. Zn was found to play an interesting role in the selectivity to reduced products, even if present in very small quantities (0.2 wt%).

A highly sensitive nonenzymatic glucose sensor based on CuO nanoparticles decorated carbon spheres

“…The Cu 2p spectrum showed two main peaks at about 937.8 and 958.0 eV, corresponding to Cu 2p 3/2 and Cu 2p 1/2 , respectively, which confirms that the Cu species was CuO[35][36][37]. Moreover, two satellite peaks could be visualized at 945.8 and 966.6 eV, which were characteristic contributions of Cu 2+ species, particularly of CuO (no shake-up peaks are observed in the absence of Cu 2+ species)[35][36][37].…”

Catalytic chemical processes for biomass conversion: Prospects for future biorefineries

“…Brought to you by | West Virginia University Authenticated Download Date | 11/20/14 5:52 PM Along these lines, our group has been recently focused on the development of a simple and efficient methodologies for the conversion of (hemi)celluloses and polysaccharides (starting from glucose as model compound) to value-added products including HMF, furfural and furan derivatives (Scheme 5) [36].…”

“…3 [36]. The reactions involved in this methodology include a preliminary dehydration of sugars to furfural (C5 sugars) and HMF (glucose and fructose) followed by subsequent hydrogenation/hydrogenolysis steps to different products as depicted in Scheme 5.…”

“…The process generally involves relatively mild reaction conditions -reaction temperature typically under 180 °C, reaction time on the order of 15-30 min, and the use of formic acid both as co-catalyst to promote the initial dehydration step of the sugar to the furan (HMF or furfural) as well as the hydrogen donating solvent (generating in-situ hydrogen for the hydrogenation/hydrogenolysis step in a similar way to that of lignin depolymerization [9][10][11]). Quantitative conversion could be obtained in the systems with a high selectivity to reduced products ( > 85 %) [36].…”

“…Scheme 5 Reproduced by permission of the Royal Society of Chemistry from reference[36]. Possible reaction products obtained from hydrogenation of HMF.…”