Catalytic oxidation kinetics of arabinose on supported gold nanoparticles

Leolincoln da Silva Correia; Henrik Grénman; Johan Wärnå; Tapio Salmi; Dmitry Murzin

doi:10.1016/j.cej.2019.03.241

Catalytic oxidation kinetics of arabinose on supported gold nanoparticles

Leolincoln da Silva Correia, Henrik Grénman, Johan Wärnå, Tapio Salmi, Dmitry Murzin

Technologies for a Sustainable Future

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Abstract

Oxidation of sugars from hemicelluloses represents an important lignocellulosic biomass valorization process and has been considered as an option to decrease high dependency of chemical industry on fossil feedstock. Gold nanoparticles as an arabinose oxidation catalyst under alkaline conditions result in high selectivity towards aldonic acids. In this work, kinetics of selective oxidation of L-arabinose to arabinonic acid over Au/Al₂O₃ was studied using data from experiments in a semibatch shaker reactor under pH-controlled conditions at atmospheric pressure. A novel model considering molecular adsorption of oxygen, production of H₂O₂ and different skeletal isomers of arabinose as reactants is reported. An experiment with D-arabinose was carried out in a conventional semibatch reactor and the model adequately predicted the results.

Original language	Undefined/Unknown
Pages (from-to)	952–961
Journal	Chemical Engineering Journal
Volume	370
DOIs	https://doi.org/10.1016/j.cej.2019.03.241
Publication status	Published - 2019
MoE publication type	A1 Journal article-refereed

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10.1016/j.cej.2019.03.241

Catalytic oxidation kinetics of arabinose on supported gold nanoparticles.pdfAccepted author manuscript, 1.86 MBLicence: CC BY-NC-ND

Cite this

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title = "Catalytic oxidation kinetics of arabinose on supported gold nanoparticles",

abstract = "Oxidation of sugars from hemicelluloses represents an important lignocellulosic biomass valorization process and has been considered as an option to decrease high dependency of chemical industry on fossil feedstock. Gold nanoparticles as an arabinose oxidation catalyst under alkaline conditions result in high selectivity towards aldonic acids. In this work, kinetics of selective oxidation of L-arabinose to arabinonic acid over Au/Al2O3 was studied using data from experiments in a semibatch shaker reactor under pH-controlled conditions at atmospheric pressure. A novel model considering molecular adsorption of oxygen, production of H2O2 and different skeletal isomers of arabinose as reactants is reported. An experiment with D-arabinose was carried out in a conventional semibatch reactor and the model adequately predicted the results.",

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T1 - Catalytic oxidation kinetics of arabinose on supported gold nanoparticles

AU - da Silva Correia, Leolincoln

AU - Grénman, Henrik

AU - Wärnå, Johan

AU - Salmi, Tapio

AU - Murzin, Dmitry

N1 - tk. begäran om fulltext 13.2.20 /MF 15 August 2019 post-print, 24 mån embargo, CC-BY-NC-ND

PY - 2019

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AB - Oxidation of sugars from hemicelluloses represents an important lignocellulosic biomass valorization process and has been considered as an option to decrease high dependency of chemical industry on fossil feedstock. Gold nanoparticles as an arabinose oxidation catalyst under alkaline conditions result in high selectivity towards aldonic acids. In this work, kinetics of selective oxidation of L-arabinose to arabinonic acid over Au/Al2O3 was studied using data from experiments in a semibatch shaker reactor under pH-controlled conditions at atmospheric pressure. A novel model considering molecular adsorption of oxygen, production of H2O2 and different skeletal isomers of arabinose as reactants is reported. An experiment with D-arabinose was carried out in a conventional semibatch reactor and the model adequately predicted the results.

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