NDLI: Incorporation of Zn2+ ions into the secondary structure of heteropoly tungstate: catalytic efficiency for synthesis of glycerol carbonate from glycerol and urea

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Incorporation of Zn2+ ions into the secondary structure of heteropoly tungstate: catalytic efficiency for synthesis of glycerol carbonate from glycerol and urea

Content Provider	Semantic Scholar
Author	Jagadeeswaraiah, K. Kumar, C. Ramesh Prasad, Potharaju S. Sai Lingaiah, N.
Copyright Year	2014
Abstract	Zinc exchanged heteropoly tungstate (ZnxTPA) catalysts were prepared and characterized by FT-IR, X-ray diffraction, Laser Raman spectroscopy, temperature programmed desorption of ammonia and pyridine adsorbed FT-IR spectroscopy. The activity of the catalysts was evaluated for the carbonylation of glycerol using urea as a carbonylating agent. ZnxTPA catalysts showed high activity for glycerol carbonate synthesis compared to the parent TPA. The activity of ZnxTPA catalysts depended on the number of Zn2+ ions in the secondary structure of heteropoly tungstate. Catalysts with partial exchange of Zn with the protons of TPA (Zn1TPA) exhibited high activity towards glycerol carbonate synthesis. Exchange of protons of TPA with Zn2+ ions resulted in generation of Lewis acidic sites. The changes in surface and structural properties of Zn1TPA catalysts with change in calcination temperature were also evaluated. The catalytic activities of ZnxTPA catalysts were explained based on the variation in their properties. Reaction conditions such as reaction temperature, catalyst weight and glycerol to urea ratio were also optimized.
Starting Page	2969
Ending Page	2977
Page Count	9
File Format	PDF HTM / HTML
DOI	10.1039/C4CY00253A
Alternate Webpage(s)	https://pubs.rsc.org/en/content/getauthorversionpdf/C4CY00253A
Alternate Webpage(s)	https://doi.org/10.1039/C4CY00253A
Volume Number	4
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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