In this paper, the Cu and ZnO nanoparticles were mixed by the ultrasonic dispersion method. The catalysts were used for dehydrogenation of 2-butanol. Comparing to the Cu and ZnO catalysts, the Cu-ZnO catalyst showed a...In this paper, the Cu and ZnO nanoparticles were mixed by the ultrasonic dispersion method. The catalysts were used for dehydrogenation of 2-butanol. Comparing to the Cu and ZnO catalysts, the Cu-ZnO catalyst showed a high catalytic activity and stability. The fresh and reacted catalysts were characterized by XRD, BET and EPR, which showed that the nano-scaled Cu and ZnO catalysts were deactivated during the reaction because of sintering and carbon deposition, respectively. In Cu-ZnO catalyst, the gathering of Cu particles was restrained by adding ZnO, and carbon deposition was avoided due to some interactions between Cu and ZnO.展开更多
A series of mesoporous Cu-Zn-Al2O3 materials have been synthesized at ambient temperature and their structure was characterized by XRD, N2 physical adsorption and TPR techniques. Their catalytic applications for the d...A series of mesoporous Cu-Zn-Al2O3 materials have been synthesized at ambient temperature and their structure was characterized by XRD, N2 physical adsorption and TPR techniques. Their catalytic applications for the dehydrogenation of 2-butanol to methyl ethyl ketone （MEK） were evaluated in a fixed-bed flow reactor at atmospheric pressure. It is demonstrated from the XRD patterns that both the as-synthesized samples and calcined samples have the typical XRD patterns of meso-structured materials and the results of N20 chemical adsorption showed that Cu was embedded in the framework of the mesoporous materials and homogeneously dispersed in the mesoporous Cu-Zn-Al2O3 materials. The catalytic activity of 2-butanol dehydrogenation was varied in the order of CZA（10） 〈 CZA（CP） 〈 CZA（20） 〈 CZA（30）; while the selectivity of MEK was increased in the order of CZA（CP） 〈 CZA（10） 〈 CZA（20） 〈CZA（30）.展开更多
文摘In this paper, the Cu and ZnO nanoparticles were mixed by the ultrasonic dispersion method. The catalysts were used for dehydrogenation of 2-butanol. Comparing to the Cu and ZnO catalysts, the Cu-ZnO catalyst showed a high catalytic activity and stability. The fresh and reacted catalysts were characterized by XRD, BET and EPR, which showed that the nano-scaled Cu and ZnO catalysts were deactivated during the reaction because of sintering and carbon deposition, respectively. In Cu-ZnO catalyst, the gathering of Cu particles was restrained by adding ZnO, and carbon deposition was avoided due to some interactions between Cu and ZnO.
基金supported by Science and Technology Development Project of Shandong Province. 2007GG3 WZ03018
文摘A series of mesoporous Cu-Zn-Al2O3 materials have been synthesized at ambient temperature and their structure was characterized by XRD, N2 physical adsorption and TPR techniques. Their catalytic applications for the dehydrogenation of 2-butanol to methyl ethyl ketone （MEK） were evaluated in a fixed-bed flow reactor at atmospheric pressure. It is demonstrated from the XRD patterns that both the as-synthesized samples and calcined samples have the typical XRD patterns of meso-structured materials and the results of N20 chemical adsorption showed that Cu was embedded in the framework of the mesoporous materials and homogeneously dispersed in the mesoporous Cu-Zn-Al2O3 materials. The catalytic activity of 2-butanol dehydrogenation was varied in the order of CZA（10） 〈 CZA（CP） 〈 CZA（20） 〈 CZA（30）; while the selectivity of MEK was increased in the order of CZA（CP） 〈 CZA（10） 〈 CZA（20） 〈CZA（30）.
