Direct transformation of ethanol to ethyl acetate was investigated on a series of Cu（ZrO2）/SiO2 catalysts. Inductively coupled plasma（ICP）, surface area analysis, X-ray diffraction（XRD）, H2-temperature programme...Direct transformation of ethanol to ethyl acetate was investigated on a series of Cu（ZrO2）/SiO2 catalysts. Inductively coupled plasma（ICP）, surface area analysis, X-ray diffraction（XRD）, H2-temperature programmed reduc- tion（H2-TPR）, X-ray photoelectron spectroscopy（XPS）, NH3-temperature programmed desorption（NH3-TPD） and Fourier transform-infrared spectroscopy（FTIR） techniques were used to characterize the catalysts. The results reveal that ZrO2 can improve the dispersion of copper species and increase the acidity of the Cu（ZrO2）/SiO2 catalysts. The Cu0 is responsible for ethanol dehydrogenation to acetaldehyde, and both the Lewis acid and Bronsted acid sites were in favor of the selectivity to ethyl acetate. The synergistic effect of Cu0 and an appropriate amount of acidic sites played an important role in the production of ethyl acetate.展开更多
基金Supported by the Natural Science Foundation of Science and Technology Department of Jilin Province, China（No.20130101015JC）, the Open Project Supported by State Key Laboratory of Inorganic Synthesis and Preparative Chemistry of Jilin University, China （No.2012-15）, and the Innovation Project of Frontiers of Science and New Interdiscipline of Jilin University, China.
文摘Direct transformation of ethanol to ethyl acetate was investigated on a series of Cu（ZrO2）/SiO2 catalysts. Inductively coupled plasma（ICP）, surface area analysis, X-ray diffraction（XRD）, H2-temperature programmed reduc- tion（H2-TPR）, X-ray photoelectron spectroscopy（XPS）, NH3-temperature programmed desorption（NH3-TPD） and Fourier transform-infrared spectroscopy（FTIR） techniques were used to characterize the catalysts. The results reveal that ZrO2 can improve the dispersion of copper species and increase the acidity of the Cu（ZrO2）/SiO2 catalysts. The Cu0 is responsible for ethanol dehydrogenation to acetaldehyde, and both the Lewis acid and Bronsted acid sites were in favor of the selectivity to ethyl acetate. The synergistic effect of Cu0 and an appropriate amount of acidic sites played an important role in the production of ethyl acetate.
