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Conversion of glycerol to hydroxyacetone over Cu and Ni catalysts.

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Title: Conversion of glycerol to hydroxyacetone over Cu and Ni catalysts.
Authors: Morales, Bárbara C. Miranda1 (AUTHOR) barbara.mirandamorales@ucr.ac.cr, Quesada, Braulio Andrés Ortega1 (AUTHOR)
Source: Catalysis Today. Jul2021, Vol. 372, p115-125. 11p.
Subjects: Glycerin, Hydroxypropanone, Copper catalysts, Nickel catalysts, Catalysts, Atmospheric nitrogen
Abstract: [Display omitted] • The higher selectivity to hydroxyacetone was obtained with the Cu/γ-Al 2 O 3 catalyst. • High selectivity to lactic acid was obtained over Cu/TiO 2. • The Cu/γ-Al 2 O 3 catalyst was totally regenerated by oxidation-reduction treatment. The conversion of glycerol to hydroxyacetone, in gas phase and atmospheric pressure, was investigated over γ-Al 2 O 3 and TiO 2 supported copper and nickel catalysts. The catalysts were prepared by co-impregnation and pre-treated with hydrogen at 450 °C. It was studied eight different catalysts at 280 °C under nitrogen atmosphere. The higher glycerol conversion and selectivity to hydroxyacetone were obtained with the monometallic Cu/γ-Al 2 O 3 and Cu/TiO 2 catalysts. Furthermore, high selectivity to lactic acid was obtained over Cu/TiO 2. These catalysts were characterized by XRD, SEM, EDS, TEM, N 2 -physisoption, and NH 3 -TPD. Furthermore, the Cu/γ-Al 2 O 3 catalyst was studied on different reaction temperature and gas flow conditions. It was obtained that the selectivity to hydroxyacetone is favors at lower temperatures. However, the catalyst suffer deactivation. Carbonaceous deposits over the used sample were not revealed by Raman and FTIR. Finally, a regeneration treatment by oxidation–reduction reactivated the Cu/γ-Al 2 O 3 catalyst successfully. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:[Display omitted] • The higher selectivity to hydroxyacetone was obtained with the Cu/γ-Al 2 O 3 catalyst. • High selectivity to lactic acid was obtained over Cu/TiO 2. • The Cu/γ-Al 2 O 3 catalyst was totally regenerated by oxidation-reduction treatment. The conversion of glycerol to hydroxyacetone, in gas phase and atmospheric pressure, was investigated over γ-Al 2 O 3 and TiO 2 supported copper and nickel catalysts. The catalysts were prepared by co-impregnation and pre-treated with hydrogen at 450 °C. It was studied eight different catalysts at 280 °C under nitrogen atmosphere. The higher glycerol conversion and selectivity to hydroxyacetone were obtained with the monometallic Cu/γ-Al 2 O 3 and Cu/TiO 2 catalysts. Furthermore, high selectivity to lactic acid was obtained over Cu/TiO 2. These catalysts were characterized by XRD, SEM, EDS, TEM, N 2 -physisoption, and NH 3 -TPD. Furthermore, the Cu/γ-Al 2 O 3 catalyst was studied on different reaction temperature and gas flow conditions. It was obtained that the selectivity to hydroxyacetone is favors at lower temperatures. However, the catalyst suffer deactivation. Carbonaceous deposits over the used sample were not revealed by Raman and FTIR. Finally, a regeneration treatment by oxidation–reduction reactivated the Cu/γ-Al 2 O 3 catalyst successfully. [ABSTRACT FROM AUTHOR]
ISSN:09205861
DOI:10.1016/j.cattod.2020.11.025