INVESTIGADORES
MORALES Maria Roxana
artículos
Título:
Role of the surface chemistry of carbon xerogel-based supports and Cu catalysts in the oxidation reaction of glycerol
Autor/es:
SAMANTHA FLORES; NAILA GÓMEZ GONZÁLEZ; ANA ARENILLAS DE LA PUENTE; CADUS, LUIS E.; MARIA R. MORALES
Revista:
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Editorial:
KOREAN SOC INDUSTRIAL ENGINEERING CHEMISTRY
Referencias:
Año: 2023 vol. 130 p. 657 - 672
ISSN:
1226-086X
Resumen:
Carbon xerogel with pore size of about 10 nm were obtained using the sol–gel method and applying differentthermal treatments. Catalysts were prepared depositing 3 wt% of copper on the xerogel. The catalytic activities ofcatalysts and supports were evaluated in the selective oxidation of glycerol (GLY). The supports showed goodconversion and selectivity to glyceric acid (GA) and lactic acid (LA), with higher preference to GA. For thecatalysts, the conversions were slightly higher, and the order of selectivity changed, benefiting the production ofLA. Changes in selectivity between supports and catalysts were mainly associated with the different acid-basesurface characteristics and the presence of the Cu domains in the catalysts. In the supports, even if the thermaltreatment applied modifies the type and content of oxygenated functional groups (OFG) on the surface,predominates a superficial acid character, addressing the selectivity to GA. On the other hand, the basic characterof the catalysts due to the Cu presence and the large metallic domain sizes favoured the production of LA. Duringthe recycle test, supports and catalysts showed a decrease in catalytic activity. After three recycles, the catalyticperformances of catalysts and supports were similar due to metal leaching.