Abstract
Cs exchanged heteropolyacid catalysts functionalized with various Sn contents were prepared by wet impregnation method. These catalysts were characterized by X-ray diffraction, FT-IR, Raman spectroscopy, temperature programmed desorption of ammonia and BET surface area measurements. The catalytic properties of Sn–CsPW catalysts were evaluated for the synthesis of glycerol carbonate and they exhibit an unprecedented activity for the higher glycerol conversion and selectivity towards glycerol carbonate under vacuum conditions. Sn-functionalized Cs exchanged heteropolyacid catalysts (CsPW) play a significant role in the enhancement of acidity, catalytic activity and stability. The glycerol conversion and the selectivity of carbonate formation mainly depend on the Sn content and acidity of the catalysts. Different reaction parameters such as Sn molar ratio, glycerol to urea molar ratio, reaction temperature were investigated and also optimum conditions were established. The catalyst containing molar ratio of 3:1 Sn–CsPW has shown highest conversion and glycerol carbonate selectivity.
Highlights
There has been an increasing demand in recent years on the biomass-derived fuels as an alternative energy sources for petroleum crudes
The catalytic properties of Sn– CsPW catalysts were evaluated for the synthesis of glycerol carbonate and they exhibit an unprecedented activity for the higher glycerol conversion and selectivity towards glycerol carbonate under vacuum conditions
The above results suggest that the active phase Sn/CsPW was well dispersed on the primary structure of Keggin ion and intensity of Keggin ion bands decreased
Summary
There has been an increasing demand in recent years on the biomass-derived fuels as an alternative energy sources for petroleum crudes. The catalyst containing molar ratio of 3:1 Sn–CsPW has shown highest conversion and glycerol carbonate selectivity. A systematic study has been made on the different molar ratios of Sn and CsPW during preparation of the catalysts, surface area and acidic functionalities.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call