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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

Author

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

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.

Suggested Citation

  • Gromov, Nikolay V. & Medvedeva, Tatiana B. & Lukoyanov, Ivan A. & Ogorodnikova, Olga L. & Panchenko, Valentina N. & Parmon, Valentin N. & Timofeeva, Maria N., 2024. "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," Renewable Energy, Elsevier, vol. 220(C).
    • Handle: RePEc:eee:renene:v:220:y:2024:i:c:s0960148123014490
    DOI: 10.1016/j.renene.2023.119534
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