Catalytic conversion of glycerol to lactic acid over graphite-supported nickel nanoparticles and reaction kinetics

[Display omitted] •Graphite-supported nano Ni0 catalysts were prepared by wet chemical reduction method.•Ni0 nanoparticles and NaOH co-catalyzed the glycerol conversion to lactic acid.•Large-sized Ni0 nanoparticles favored the glycerol conversion to lactic acid.•A power-function type reaction kineti...

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Bibliographic Details
Published inJournal of industrial and engineering chemistry (Seoul, Korea) Vol. 57; pp. 226 - 235
Main Authors Yin, Haixu, Yin, Hengbo, Wang, Aili, Shen, Lingqin
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.2018
한국공업화학회
Subjects
Glycerol
Graphite
Lactic acid
Nickel nanoparticles
Reaction kinetics
화학공학
Glycerol
Lactic acid
Graphite
Reaction kinetics
Nickel nanoparticles
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Summary:[Display omitted] •Graphite-supported nano Ni0 catalysts were prepared by wet chemical reduction method.•Ni0 nanoparticles and NaOH co-catalyzed the glycerol conversion to lactic acid.•Large-sized Ni0 nanoparticles favored the glycerol conversion to lactic acid.•A power-function type reaction kinetics model well fitted the experimental data. Catalytic conversion of biomass glycerol to lactic acid is an alternative to the conventional fermentation process starting from carbohydrate. Graphite-supported metallic Ni0 nanoparticles effectively catalyzed the hydrothermal conversion of glycerol to lactic acid in NaOH aqueous solution. Ni0 nanoparticle and NaOH synergistically catalyzed the glycerol conversion to lactic acid. When the reaction was carried out with the initial glycerol and NaOH concentrations of 1.0 and 1.1molL−1 at 230°C for 3h over Ni0.3/graphite catalyst, the selectivity of lactic acid was 92.2% at the glycerol conversion of 97.6%. The reaction activation energy, Ea, was 69.2kJmolL−1.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2017.08.028