Jump to main content
Jump to site search

Issue 49, 2017, Issue in Progress
Previous Article Next Article

Hydrothermal conversion of high-concentrated glycerol to lactic acid catalyzed by bimetallic CuAux (x = 0.01–0.04) nanoparticles and their reaction kinetics

Author affiliations

Abstract

Catalytic hydrothermal conversion of highly concentrated glycerol to lactic acid was investigated over bimetallic CuAux (x = 0.01–0.04) nanoparticle catalysts. The bimetallic CuAux nanoparticles were prepared by the wetness chemical reduction method and characterized by XRD, TEM, HRTEM, XPS, and atomic absorption spectrophotometry techniques. Metallic Cu and Au nanoparticles coalesced to form secondary bimetallic nanoparticles with an alloy trend. The bimetallic CuAux nanoparticles exhibited higher catalytic activity for the conversion of highly concentrated glycerol (2−3 mol L−1) to lactic acid than both sole monometallic Cu and Au nanoparticles, probably due to the alloying tendency between the metallic Cu and Au nanoparticles. When the reaction was carried out with the initial glycerol and NaOH concentrations of 3.0 and 3.3 mol L−1 at 200 °C for 2 h, the yields of lactic acid over the bimetallic CuAu2, CuAu3, and CuAu4 catalysts were above 83% and the formation rate of lactic acid was more than 0.17 mol gcat−1 h−1. The carbon balance values ranged from 89.2% to 92.9%. The reaction activation energies for glycerol conversion over the bimetallic CuAu1, CuAu2, CuAu3, and CuAu4 catalysts were 64.0, 53.4, 46.8, and 36.9 kJ mol−1, respectively. The hydrothermal conversion of high-concentrated glycerol to lactic acid catalyzed by the bimetallic CuAux nanoparticles is an alternative to the conventional fermentation process starting from carbohydrate.

Graphical abstract: Hydrothermal conversion of high-concentrated glycerol to lactic acid catalyzed by bimetallic CuAux (x = 0.01–0.04) nanoparticles and their reaction kinetics

Back to tab navigation

Supplementary files

Publication details

The article was received on 19 Apr 2017, accepted on 07 Jun 2017 and first published on 14 Jun 2017


Article type: Paper
DOI: 10.1039/C7RA04415A
RSC Adv., 2017,7, 30725-30739
  • Open access: Creative Commons BY license
  •   Request permissions

    Hydrothermal conversion of high-concentrated glycerol to lactic acid catalyzed by bimetallic CuAux (x = 0.01–0.04) nanoparticles and their reaction kinetics

    L. Shen, X. Zhou, A. Wang, H. Yin, H. Yin and W. Cui, RSC Adv., 2017, 7, 30725
    DOI: 10.1039/C7RA04415A

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements