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IS-AUR-Samarb.progr. Norge Frankrike

Combining Electrochemistry and Ultrasound for Selective Biomass Conversion

Awarded: NOK 74,725

The use of biomass as an alternative raw material to fossil resources is of great interest for the industry. Lignocellulosic biomass consists mainly of cellulose, lignin, and hemicellulose. Various treatments (mainly thermal) allow the depolymerization or deconstruction of these solid materials and the separation into major constituents. Sugars (glucose, xylose etc) are obtained as a result of acidic or enzymatic hydrolysis of cellulose and hemicellulose, which in turn serve as reagents for the synthesis of "platform" molecules such as polyols (xylitol, sorbitol and glycerol). The oxidation products of these compounds, in particular acids and carboxylic diacids, lead to the formation of important compounds for various applications ranging from cosmetic and detergents (surfactants) to bio-sourced polymers Non-thermal activation methods, such as electrochemistry and sonochemistry (power ultrasound in chemistry), are known to increase the catalytic activity of biomass conversion while allowing excellent control of the selectivity. These two methods allow very high potential for use in the fields of organic synthesis and catalysis. The development of these non-thermal activation methods is also a very important research area towards a transition to cleaner and more sustainable chemical processes. In this project it is proposed to study the mechanisms and selectivity of conversion of cellulosic biomass-derived molecules under the combined effect of power ultrasound and electrochemistry. In order to carry out a fundamental study to understand the electrochemical conversion mechanisms under ultrasonic irradiation, both teams will lead work on targeted molecules: glucose, sorbitol and glycerol. From the proposers knowledge, no studies have been conducted to assess the use of power ultrasound for the electrochemical or sonoelectrochemical conversion of molecules from biomass.

Funding scheme:

IS-AUR-Samarb.progr. Norge Frankrike