Detailed kinetic investigations on the selective oxidation of biomass to formic acid (OxFA process) using model substrates and real biomass

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Details zur Publikation

Autor(en): Albert J, Reichert J
Zeitschrift: ACS Sustainable Chemistry & Engineering
Jahr der Veröffentlichung: 2017
ISSN: 2168-0485


Abstract

A detailed kinetic analysis of the selective catalytic oxidation of different biogenic model substrates to formic acid (OxFA process) is presented using two different polyoxometalate catalysts, HPA-2 (H5PV2Mo10O40) and HPA-5 (H8PV5Mo7O40). By using high oxygen pressures (30$-$60 bar) and temperatures of 80$-$90 °C in aqueous solution, we were able to investigate the rate-determining substrate oxidation step catalyzed by the oxidized form of the polyoxometalates (POMs) by keeping the concentration of the catalytic active species constant. Under these conditions, kinetic parameters like effective reaction order and reaction rate constants could be determined by the differential method for model substrates like glucose, fructose, sorbitol, and gluconic acid. Furthermore, kinetic experiments using the two different catalysts showed a different behavior for various functionalities within the carbon framework of the substrate with the tendency of higher reaction rates with the HPA-5 catalyst. This effect was more pronounced for disaccharides like cellobiose and sucrose than for monosaccharides. Finally, a detailed kinetic study for water-insoluble biomasses like beech and spruce wood showed differences in formic acid (FA) formation and product selectivities depending on the composition of the wood in terms of their ratios of lignin, cellulose, and hemicellulose.


FAU-Autoren / FAU-Herausgeber

Albert, Jakob Dr.-Ing.
Lehrstuhl für Chemische Reaktionstechnik
Reichert, Jenny
Lehrstuhl für Chemische Reaktionstechnik


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Albert, J., & Reichert, J. (2017). Detailed kinetic investigations on the selective oxidation of biomass to formic acid (OxFA process) using model substrates and real biomass. ACS Sustainable Chemistry & Engineering. https://dx.doi.org/10.1021/acssuschemeng.7b01723

MLA:
Albert, Jakob, and Jenny Reichert. "Detailed kinetic investigations on the selective oxidation of biomass to formic acid (OxFA process) using model substrates and real biomass." ACS Sustainable Chemistry & Engineering (2017).

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Zuletzt aktualisiert 2019-14-03 um 12:00