Title :

Kinetic modelling of the glycerol oxidation in the liquid phase: comparison of Pt, Au and Ag AS active phases

Author(s) :

Díaz, José Antonio [Auteur]
Institut de recherches sur la catalyse et l'environnement de Lyon [IRCELYON]
Skrzyńska, Elżbieta [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Zaid, Soraya [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Girardon, Jean-Sébastien [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Capron, Mickael [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Dumeignil, Franck [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Fongarland, Pascal [Auteur]
Laboratoire de Génie des Procédés Catalytiques [LGPC]

Journal title :

Journal of Chemical Technology & Biotechnology

Volume number :

92

Pages :

2267-2275

Publication date :

2017

HAL domain(s) :

Chimie/Catalyse

English abstract : [en]

BACKGROUND Unlike Pt and Au, Ag has recently been reported to be an active catalyst for the synthesis of glycolic acid from the liquid phase oxidation of glycerol (GLY). In order to provide comparative information about ...
Show more >BACKGROUND Unlike Pt and Au, Ag has recently been reported to be an active catalyst for the synthesis of glycolic acid from the liquid phase oxidation of glycerol (GLY). In order to provide comparative information about the kinetics of this reaction using Pt, Au or Ag, a kinetic model was derived for each catalyst (Ag/, Pt/ and Au/Al2O3), using the experimental results obtained at different temperatures. RESULTS A power‐law kinetic model was proposed for each catalyst, which included the Khang–Levenspiel model to evaluate potential catalyst deactivation. All three kinetic models predicted well the experimental concentrations. Pt/ and Au/Al2O3 showed higher kinetic rate constants, the highest being that of the production of glyceric acid. The lower the metal particle size, the higher the kinetic rate constant of the production of glyceric acid was. Deactivation parameters played an important role in the model of Pt/Al2O3, so that Au/ and Ag/Al2O3 seemed to be more resistant to deactivation. CONCLUSIONS This work reports the first kinetic model for the oxidation of GLY using an Ag‐based catalyst. It showed a noticeable kinetic rate constant for the production of glycolic acid. The activation energies obtained were in the range 48–97 kJ mol−1.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

Matériaux pour la catalyse (MATCAT)
Valorisation des alcanes et de la biomasse (VAALBIO)

Submission date :

2019-09-25T14:05:31Z
2020-09-21T09:45:32Z