1. Catalytic oxidation kinetics of arabinose on supported gold nanoparticles
- Author
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Tapio Salmi, Henrik Grénman, Leolincoln da Silva Correia, Johan Wärnå, and Dmitry Yu. Murzin
- Subjects
Arabinose ,Atmospheric pressure ,General Chemical Engineering ,Kinetics ,Lignocellulosic biomass ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,Raw material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Oxygen ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,chemistry.chemical_compound ,Chemical engineering ,chemistry ,Catalytic oxidation ,Colloidal gold ,Environmental Chemistry ,0210 nano-technology - 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.
- Published
- 2019
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