期刊
APPLIED CATALYSIS A-GENERAL
卷 590, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcata.2019.117313
关键词
Glycerol; Glycerol carbonate; CaO-ZrO2; Fixed-bed
资金
- Key Research and Development Program of Shandong Province [2018GGX107010]
- Natural Science Foundation of Shandong Province [ZR2016BL21, ZFt2018LB030]
- Science and Technology Research Program for Colleges and Universities in Shandong Province [J18KA107]
- Zaozhuang independent innovation and achievements transformation projects [201502]
- National Training Programs of Innovation and Entrepreneurship for Undergraduates [201710904063, 201710904064]
Recently, transformation of glycerol into glycerol carbonate (GLC) has been of critical importance. Although traditional Ca-based catalysts present high activity for the GLC synthesis, their industrial applications are hindered by the leaching of Ca2+. Here, a series of mesoporous CaO-ZrO2 with high surface area were obtained without template. CO2 temperature-programmed desorption displayed that the basic properties of the catalysts can be controlled by the content of Ca dopant. Importantly, Ca2+ can be introduced into t-ZrO2 lattice, resulting in the formation of a solid solution structure. Based on systematic experiments, a correlation between their basic properties and catalytic behavior was explained. Under the optimized conditions, the catalyst with a certain ratio of Ca: Zr = 0.6: 1 showed an excellent performance with a 97% glycerol conversion and a 93% selectivity of GLC. Furthermore, the solid solution structure rendered this catalyst high resistance to reactant flushing in a fixed-bed, without leaching of active sites.
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