1. Glycerol carbonylation with CO2 to glycerol carbonate over CeO2 catalyst and the influence of CeO2 preparation methods and reaction parameters.
- Author
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Liu, Jiaxiong, Li, Yuming, Zhang, Juan, and He, Dehua
- Subjects
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GLYCERIN , *CARBONYLATION , *METAL catalysts , *CERIUM oxides , *CARBON dioxide , *X-ray powder diffraction , *PRECIPITATION (Chemistry) - Abstract
The synthesis of glycerol carbonylation with CO 2 to glycerol carbonate over CeO 2 catalyst was investigated. CeO 2 with different morphologies was prepared by traditional precipitation (TP), hydrothermal (TH) and citrate sol-gel (SG) methods, and the reaction of glycerol with CO 2 was carried out in the presence of a dehydrating agent and solvent. The effect of preparation methods of CeO 2 and reaction parameters on the activity and selectivity of the catalysts were examined. The structures, morphologies and surface properties of the catalysts were characterized by XRD, TEM, BET, CO 2 -TPD, H 2 -TPR, Raman and XPS. CeO 2 exhibited high catalytic activity for the formation of glycerol carbonate under mild reaction conditions. The carbonylation of glycerol was influenced by the redox property of CeO 2 . The effects of different types of dehydrating agent and solvent were also studied. The dehydrating agent (2-cyanopyridine) and solvent (Dimethyl Formamide(DMF)) contributed to the increase of glycerol conversion and the yield of glycerol carbonate. The yield of glycerol carbonate could reach as high as 78.9%, and the catalysts could be easily regenerated by calcination at 400 °C for 5 h without loss of activity after 5 recycling times. The proper reaction conditions were 150 °C, 4 MPa and 5 h. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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