Solvent-Free Production of Glycerol Carbonate from Bioglycerol with Urea Over Nanostructured Promoted SnO2 Catalysts

Mallesham, Baithy and Rangaswamy, Agolu and Rao, Bolla Govinda and Rao, Tumula Venkateshwar and Reddy, Benjaram M. (2020) Solvent-Free Production of Glycerol Carbonate from Bioglycerol with Urea Over Nanostructured Promoted SnO2 Catalysts. Catalysis Letters, 150 (12). pp. 3626-3641. ISSN 1011-372X

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Abstract: In this study nanostructured MoO3 and WO3 promoted SnO2 solid acid catalysts were explored for the production of glycerol carbonate via carbonylation of bioglycerol with urea. The investigated reference SnO2 and promoted catalysts were synthesized by fusion and wet-impregnation methods, respectively. The physicochemical properties of the prepared catalysts were thoroughly analyzed by XRD, Raman, BET surface area, TEM, FTIR, pyridine adsorbed FTIR, NH3-TPD, and XPS techniques. It was found from the characterization studies that integration of SnO2 with MoO3 and WO3 promoters leads to remarkable structural, textural, and acidic properties. Especially, a high quantity of acidic sites were observed over the MoO3/SnO2 catalyst (~ 81.45 μmol g−1) followed by WO3/SnO2 (61.81 μmol g−1) and pure SnO2 (46.47 μmol g−1), which played a key role in the carbonylation of bioglycerol with urea. The BET specific surface area and oxygen vacancies of SnO2 were significantly enhanced after the addition of MoO3 and WO3 promoters. TEM images revealed the formation of nanosized particles with a diameter of around 5–25 nm for the synthesized catalysts. The MoO3/SnO2 catalyst exhibited a high conversion and selectivity towards glycerol carbonate in comparison to other catalysts. The observed better performance is attributed to unique properties of MoO3/SnO2 catalyst including smaller crystallite size, high specific surface area, abundant oxygen vacancies, and more number of acidic sites. This catalyst also exhibited remarkable stability with no significant loss of activity in the recycling experiments. Graphic Abstract: Nanostructured MoO3/SnO2 solid acid catalyst exhibited an excellent catalytic activity and a high selectivity to glycerol carbonate in the carbonylation of bioglycerol with urea under solvent-free and mild conditions.[Figure not available: see fulltext.] © 2020, Springer Science+Business Media, LLC, part of Springer Nature.

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Item Type: Article
Additional Information: BM thanks DST-SERB, New Delhi for the award of National Post-Doctoral Fellowship (PDF/2018/002244). AR and BGR thank the Council of Scientific and Industrial Research (CSIR), New Delhi, for the award of research fellowships. BMR thanks the Department of Atomic Energy (DAE), Mumbai for the award of the Raja Ramanna Fellowship. Authors thank the Director, CSIR-IICT for support of this work.
Uncontrolled Keywords: Acidic sites; Bioglycerol; Glycerol carbonate; MoO3/SnO2; SnO2; Urea
Subjects: Chemical Engineering
Chemical Engineering > Biochemical Engineering
Divisions: Department of Chemical Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 23 Nov 2022 07:08
Last Modified: 23 Nov 2022 07:08
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