期刊
APPLIED CATALYSIS A-GENERAL
卷 580, 期 -, 页码 167-177出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2019.04.010
关键词
Reduced sulfonated graphene oxide; Ascorbic acid reduction; Glycerol etherification; tert-butyl alcohol; Glycerol ethers
资金
- Colciencias [617]
- European Union (ERDF)
- Region Nouvelle Aquitaine
Heterogeneous acid catalysts were obtained based on the functionalization of reduced graphene oxide. The synthesis involves i) the obtaining of graphene oxide by the modified Hummers method ii) the reduction of graphene oxide by three different routes, through the use of hydrazine dihydrochloride, Zn/HCl and ascorbic acid, and iii) the grafting of sulfonic groups in the surface of graphene oxides with 4-diazonium benzene-sulfonate. These solids were characterized and evaluated in the etherification of glycerol with tert-butyl alcohol, finding in general glycerol conversions higher than those obtained with a sulfonic resin (Amberlyst (R) 15). In addition, the selectivity depends on the reduction route used to obtain the catalyst; A larger amount of oxygen groups remaining after the reduction, helps the formation of poly-substituted ethers. These solids also showed stability in their use, converting them into highly efficient catalysts in the valorization of glycerol.
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