Journal
HELIYON
Volume 7, Issue 1, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.heliyon.2021.e06018
Keywords
1,3-dioxane; 1,3-dioxolane; Glycerol; Benzaldehyde; SO42-/CeO2-ZrO2; Combustion method
Categories
Funding
- Vision Group on Science and Technology [VGST/GRD-691]
- MSRIT
Ask authors/readers for more resources
The focus of this study was the synthesis of 1,3-dioxane and 1,3-dioxolane using sulfated CeO2-ZrO2 catalyst for the acetalization of glycerol with benzaldehyde. The experiments showed that under specific conditions, high product selectivity could be achieved.
Synthesis of 1,3- dioxane and 1,3-dioxolane, using sulfated CeO2 -ZrO2 catalyst for acetalization of glycerol with benzaldehyde, is the focus of present work. SO42-/ CeO2 -ZrO2 catalyst was synthesized using combustion method. Experiments were carried out to analyze the effect of various solvents (n-hexane, toluene, tert-butyl alcohol, pentanol), molar ratios (1:3, 1:5, 1:7), catalyst loadings (3 wt%, 5 wt%, 9 wt %) and temperatures (80 degrees C, 90 degrees C, 100 degrees C) on glycerol conversion and selectivity of the products. Selectivity of 87.20% dioxolane and 12.80% dioxane was obtained at molar ratio of 1:3, 9 wt% catalyst loading and temperature of 100 degrees C.Strong NH3 desorption peak from NH3-TPD study indicated the high acidic strength of sulphated catalyst. Strong surface acidity and surface porosity (observed from TEM and SEM analysis) contributed to an enhanced activity of the catalyst for glycerol acetalization reaction. The kinetics of the reaction was studied using an elementary kinetic law. A correlation coefficient of 0.98 from the selected kinetic model proved that the rate of acetalization reaction was dependent on glycerol concentration and acetal formation was instantaneous. The study demonstrated the application of an environmentally benign, inexpensive, thermally stable, active SO42-/ CeO2 -ZrO2 catalyst for glycerol acetalization reaction to synthesize 1,3-dioxolane as the desired product.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available