Products Cited in Publications Worldwide Catalytic Valorization of Humins by Selective Oxidation Using Transition-Metal-Substituted Keggin-Type Polyoxometalate Catalysts

Catalytic Valorization of Humins by Selective Oxidation Using Transition-Metal-Substituted Keggin-Type Polyoxometalate Catalysts

Tobias Esser; André Wassenberg; Jan-Christian Raabe; Dorothea Voß; Jakob Albert

DOI:

Abstract

The main objective of this study was to gain a deeper understanding of oxidative valorization of humins using polyoxometalate (POM) catalysts. Based on experiments using individual monofuran derivatives as a substrate, evident reaction pathways for the conversion to were postulated. By analogous routes, difuran derivatives or branched rings could also be converted to and formic acid, respectively. Hereby, the monovanadium-substituted catalyst was found to be superior compared to other structures in terms of activity and selectivity due to its unique electrochemical properties. In detail, H4[PVMo11O40] showed the lowest peak potential in Square-Wave-Voltammetry measurements, achieving the highest activity and selectivity. Hereby, a deeper understanding of the selective oxidation of humin model substrates like derivatives of varying complexity could be achieved. Therefore, helpful conclusions can be drawn for the transformation of humins representing a decisive step toward efficient processes for their valorization.

Keywords

biomass ; polyoxometalate catalysts ; humin ; selective oxidation ; maleic acid

Purchased from AmBeed

A14103814032-66-796%

5-Hydroxyfuran-2(5H)-one

45.0/100mg

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