Kinetics of the one-pot transformation of citronellal to menthols on Ru/H-BEA catalysts

Jutta Plößer, Martin Lucas, Johan Wärnå, Tapio Salmi, Dmitry Murzin, Peter Claus

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9 Citations (Scopus)

Abstract

Temperature, pressure, and concentration variation experiments were conducted in the one-pot-transformation of citronellal to menthol with 1%Ru/H-BEA-25 as bifunctional catalyst. This reaction requires a combination of a cyclization and hydrogenation step, therefore the product distribution strongly depends on reaction conditions, especially on the reaction temperature. At lower temperatures the consecutive hydrogenation of citronellal prevails, whereas at high temperatures defunctionalization of menthols is favored leading to a maximum menthol yield at 373 K. A kinetic model was proposed based on a Langmuir–Hinshelwood mechanism and different active sites for cyclization and hydrogenation reactions. Kinetic parameters (reaction constants, activation energies, and adsorption coefficients) were estimated by using nonlinear regression.
Original languageUndefined/Unknown
Pages (from-to)1647–1653
JournalOrganic Process Research and Development
Volume20
Issue number9
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • engineering education

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