Role of preparation parameters of Cu-Zn mixed oxide catalyst in solvent free glycerol carbonylation with urea

TitleRole of preparation parameters of Cu-Zn mixed oxide catalyst in solvent free glycerol carbonylation with urea
Publication TypeJournal Article
Year of Publication2021
AuthorsCharate, S, Shinde, S, Kondawar, S, Desai, U, Wadgaonkar, P, Rode, C
JournalJournal of the Indian Chemical Society
Volume98
Issue7
Pagination100090
Date PublishedJUL
Type of ArticleArticle
ISSN0019-4522
KeywordsCo-precipitation (CP), Glycerol, Glycerol carbonate, Oxalate gel (OG)
AbstractSolvent-free carbonylation of glycerol with urea to glycerol carbonate (GC) was achieved over heterogeneous Cu-Zn mixed oxide catalyst. Cu-Zn catalysts with different ratios of Cu:Zn were prepared using co-precipitation (CP) and oxalate gel (OG) methods. As compared to CuO-ZnO(2:1) catalyst prepared by oxalate gel (OG) method, much higher conversion of glycerol and highest selectivity towards glycerol carbonate (GC) was achieved with CuO-ZnO_CP(2:1) catalyst. Physicochemical properties of prepared catalysts were investigated by using XRD, FT-IR, BET, TPD of CO2 and NH3 and TEM techniques. The effect of stoichiometric ratio of Cu/Zn, calcination temperature of CuO-ZnO catalysts and effect of reaction parameters such as molar ratio of substrates, time and temperature on glycerol conversion to GC were critically studied. Cu/Zn of 2:1 ratio, glycerol-urea 1:1 molar ratio, 145 degrees C reaction temperatures were found to be optimized reaction conditions to achieve highest glycerol conversion of 86% and complete selectivity towards GC. The continuous expel of NH 3 from reaction the mixture avoided formation of ammonia complex with CuO-ZnO catalyst. As a result of this, CuO-ZnO catalyst could be recycled up to three times without losing its initial activity.
DOI10.1016/j.jics.2021.100090
Type of Journal (Indian or Foreign)Indian
Impact Factor (IF)0.284
Divison category: 
Chemical Engineering & Process Development

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