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Highly Selective Lanthanum-Modified Zirconia Catalyst for the Conversion of Ethanol to Propylene: A Combined Experimental and Simulation Study.
- Source :
-
Catalysis Letters . Jan2020, Vol. 150 Issue 1, p150-158. 9p. - Publication Year :
- 2020
-
Abstract
- La/ZrO2 catalysts were prepared by co-precipitation method. The physical and chemical properties of the catalysts were characterized by N2 adsorption–desorption method, X-ray diffraction and temperature programmed desorption. The selective conversions of ethanol to propylene over these synthesized La/ZrO2 catalysts were also investigated. The optimum propylene yield reached 42.3% over La(1)/ZrO2 catalyst. A coordination of redox and acid–base properties accounts for the remarkable improvement of reaction performance over La/ZrO2 catalysts. On the basis of calculation results, the introduction of oxygen vacancy or La results in significant charge transfer. The Lewis acid–base (Zr–O) pair sites become more active as a result of charge transfer over La/ZrO2 catalysts. Furthermore, the formation of O vacancies over La/ZrO2 (101) is easier than that over t-ZrO2(101). Therefore, La modification improves the performance of ZrO2 on conversion of ethanol to propylene. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PROPENE
*CHEMICAL properties
*CATALYSTS
*CHARGE transfer
*ETHANOL
Subjects
Details
- Language :
- English
- ISSN :
- 1011372X
- Volume :
- 150
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Catalysis Letters
- Publication Type :
- Academic Journal
- Accession number :
- 141099627
- Full Text :
- https://doi.org/10.1007/s10562-019-02916-2