Hydrolysis-oxidation of starch to formic acid in the presence of vanadium-containing molybdophosphoric heteropoly acid (H3+xPMo12-xVxO40): Effect of acidity and vanadium content on the yield of formic acid

Nikolay V. Gromov, Tatiana B. Medvedeva, Ivan A. Lukoyanov, Olga L. Ogorodnikova, Valentina N. Panchenko, Valentin N. Parmon and Maria N. Timofeeva

Renewable Energy, 2024, vol. 220, issue C

Abstract: Formic acid (FA) is an important chemical commodity as well as a promising medium for hydrogen storage and hydrogen production. Herein, a one-pot hydrolysis-oxidation of starch to formic acid (FA) catalyzed by molybdovanadophosphoric heteropoly acids (H3+xPMo12-xVxO40, x = 1, 2, 4, and 5) (PMo12-xVx) as bifunctional catalysts was demonstrated. The reaction was investigated at 120–150 °C. 2–5 MPa of gas mixture (O2/N2 - 20/80 vol/vol) was used as the oxidant. The rate of starch hydrolysis to glucose was found to decrease with decreasing the strength of PMo12-xVx. The yield of FA was demonstrated to depend on the number of V atoms in the framework of heteropoly anion. The initial rate of FA formation rose with an increasing number of V atoms. However, multi-substituted HPA favors overoxidation of the reaction mixture. Maximum yield of formic acid reached 67 % in 7 h under optimal conditions.

Keywords: Hydrolysis-oxidation; Starch; Formic acid; Bifunctional catalyst; Heteropoly acid (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:220:y:2024:i:c:s0960148123014490

DOI: 10.1016/j.renene.2023.119534

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