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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]
Copyright of Catalysis Today is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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  Data: Conversion of glycerol to hydroxyacetone over Cu and Ni catalysts.
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  Data: <searchLink fieldCode="AR" term="%22Morales%2C+Bárbara+C%2E+Miranda%22">Morales, Bárbara C. Miranda</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> barbara.mirandamorales@ucr.ac.cr</i><br /><searchLink fieldCode="AR" term="%22Quesada%2C+Braulio+Andrés+Ortega%22">Quesada, Braulio Andrés Ortega</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Catalysis+Today%22">Catalysis Today</searchLink>. Jul2021, Vol. 372, p115-125. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Glycerin%22">Glycerin</searchLink><br /><searchLink fieldCode="DE" term="%22Hydroxypropanone%22">Hydroxypropanone</searchLink><br /><searchLink fieldCode="DE" term="%22Copper+catalysts%22">Copper catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Nickel+catalysts%22">Nickel catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysts%22">Catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+nitrogen%22">Atmospheric nitrogen</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: [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]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Catalysis Today is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.cattod.2020.11.025
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      – Code: eng
        Text: English
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        PageCount: 11
        StartPage: 115
    Subjects:
      – SubjectFull: Glycerin
        Type: general
      – SubjectFull: Hydroxypropanone
        Type: general
      – SubjectFull: Copper catalysts
        Type: general
      – SubjectFull: Nickel catalysts
        Type: general
      – SubjectFull: Catalysts
        Type: general
      – SubjectFull: Atmospheric nitrogen
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      – TitleFull: Conversion of glycerol to hydroxyacetone over Cu and Ni catalysts.
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            NameFull: Quesada, Braulio Andrés Ortega
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            – D: 15
              M: 07
              Text: Jul2021
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              Y: 2021
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              Value: 372
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