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Cu-Mn composite oxides: A highly efficient and reusable acid-base catalysts for the carbonylation reaction of glycerol with urea

Abstract

A series of Cu-Mn composite oxides were prepared by co-precipitation. Interestingly, catalysts with varied Cu/Mn molar ratios showed different catalytic performance for glycerol carbonylation.The physico-chemical properties of the catalyst are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FI-IR), temperature-programmed desorption (TPD) of CO2 and NH3 and temperature-programmed reduction (H2-TPR) technology. The results showed that the Cu1.4Mn1.6O4 crystal phase is the active component of the catalyst for the carbonylation of glycerol, this phase can effectively provide Mn4+ and lattice oxygen (O2-), and the existence of the Mn4+-O2- Lewis acid-base pair can promote the formation of glycerol carbonate. Various reaction parameters, such as reaction temperature, time, molar ratio of glycerol to urea and the amount of catalyst are studied. Under optimal reaction conditions, the conversion of glycerol is 91.0% with 99.1% glycerol carbonate selectivity.

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Publication details

The article was received on 17 Oct 2018, accepted on 07 Nov 2018 and first published on 09 Nov 2018


Article type: Paper
DOI: 10.1039/C8CY02155D
Citation: Catal. Sci. Technol., 2018, Accepted Manuscript
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    Cu-Mn composite oxides: A highly efficient and reusable acid-base catalysts for the carbonylation reaction of glycerol with urea

    W. Luo, L. Sun, Y. Yang, Y. Chen, Z. Zhou, J. Liu and F. Wang, Catal. Sci. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C8CY02155D

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