NDLI: Synthesis of glycerol carbonate by direct carbonylation of glycerol with CO<sub>2</sub> over solid catalysts derived from Zn/Al/La and Zn/Al/La/M (M = Li, Mg and Zr) hydrotalcites

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Bingsheng Zhao, Ning Xiao, Fukui Wei, Wei Sun, Yuhan Li, Lei Jiao, Xi Li, Hongguang
Copyright Year	2015
Abstract	Zn/Al/La and Zn/Al/La/M (M = Li, Mg, Zr) mixed oxides were obtained by calcination of hydrotalcite precursors and tested for glycerol carbonate (GC) synthesis from CO2 carbonylation. The results indicated the catalytic activity may be associated with the large specific surface area, the high surface content of Zn and the high binding energy of Zn atoms as well as the high density of moderately basic sites. The good result was obtained on the catalyst with a molar ratio of Zn : La : Al = 4 : 1 : 1 and, within a certain range, glycerol conversion and GC yield increase linearly upon the increase of the density of moderately basic sites. In addition, the catalytic activity was obviously improved upon introduction of Li, Mg and Zr. The effect of reaction parameters on the carbonylation of glycerol was also studied. The DRIFTS results suggest that the activated CO2 may be in the form of a bridged bidentate carbonate that inserts into zinc glycerolate to form an intermediate species of a seven-membered ring ester followed by intramolecular rearrangement to produce GC. Theoretical calculation results indicated that the seven-membered ring ester has good stability and the formation process happens spontaneously.
Starting Page	989
Ending Page	1005
Page Count	17
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	5
Issue Number	2
Journal	Catalysis Science & Technology
DOI	10.1039/c4cy01237b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ester Zirconium Hydrotalcite Carbonylation Binding energy Denticity Glycerol Calcination Specific surface area Concentration Li Zinc
Content Type	Text
Resource Type	Article
Subject	Catalysis

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