Effect of Alumina Grinding on the Properties of Alumina Supported Palladium Catalysts in Selective Hydrogenation of Acetylene
Title | Effect of Alumina Grinding on the Properties of Alumina Supported Palladium Catalysts in Selective Hydrogenation of Acetylene PDF eBook |
Author | |
Publisher | |
Pages | 190 |
Release | 2008 |
Genre | Acetylene |
ISBN |
In this study, the effects of alumina grinding and mixed oxides (ZnO-Al2O3 and NiO-Al2O3) grinding with various Zn/Al and Ni/Al molar ratios (0.1 and 0.5) prepared by an attrition ball mill on catalytic performance of alumina supported Pd catalysts for selective hydrogenation of acetylene were investigated. It was found that catalytic performances of the Pd catalyst supported on Al2O3 milled for 12 h were superior compared to those of Pd-supported on the unmilled Al2O3. However, all the catalysts prepared from milled mixed oxides presented lower acetylene conversion and ethylene selectivity than that of the catalyst prepared from alumina milled for 12 h. From X-ray diffraction, it was suggested that varying milling time directly affected the crystallite size, surface area and acidity of alumina supports. As revealed by CO chemisorption, milling of Al2O3 supports could increase metal active sites of Pd/Al2O3 catalysts without change in the interaction between Pd and the alumina support so that the catalysts exhibited higher acetylene activity and ethylene selectivity. Moreover, increasing of acidity affected coke formation on the catalysts.
The Selective Hydrogenation of Nitrobenzene at Elevated Temperatures Over Alumina-supported Palladium Catalysts
Title | The Selective Hydrogenation of Nitrobenzene at Elevated Temperatures Over Alumina-supported Palladium Catalysts PDF eBook |
Author | James Warren Campbell |
Publisher | |
Pages | 190 |
Release | 2019 |
Genre | Aniline |
ISBN |
The Selective Hydrogenation of Acetylene Over Pd and Pd-Cu on Alumina Catalysts
Title | The Selective Hydrogenation of Acetylene Over Pd and Pd-Cu on Alumina Catalysts PDF eBook |
Author | Stephen Claude LeViness |
Publisher | |
Pages | 500 |
Release | 1984 |
Genre | Acetylene |
ISBN |
Selective Hydrogenation of Trace Acetylene in Ethylene Over Pd-Cu Alumina Catalysts
Title | Selective Hydrogenation of Trace Acetylene in Ethylene Over Pd-Cu Alumina Catalysts PDF eBook |
Author | Vinayan Nair |
Publisher | |
Pages | 404 |
Release | 1983 |
Genre | Acetylene |
ISBN |
The Effect of Alumina Supports on the Properties of Supported Nickel Catalysts
Title | The Effect of Alumina Supports on the Properties of Supported Nickel Catalysts PDF eBook |
Author | Shih-Li Chen |
Publisher | |
Pages | 168 |
Release | 1990 |
Genre | Nickel catalysts |
ISBN |
Chemical Abstracts
Title | Chemical Abstracts PDF eBook |
Author | |
Publisher | |
Pages | 2616 |
Release | 2002 |
Genre | Chemistry |
ISBN |
Inelastic Electron Tunneling Spectroscopic Study of Acetylene Chemisorbed on Alumina Supported Palladium Particles
Title | Inelastic Electron Tunneling Spectroscopic Study of Acetylene Chemisorbed on Alumina Supported Palladium Particles PDF eBook |
Author | A. Bayman |
Publisher | |
Pages | 30 |
Release | 1983 |
Genre | |
ISBN |
Inelastic electron tunneling spectroscopy was used to study the adsorption of acetylene on palladium particles supported by alumina. Low peak intensities in the spectra complicated the analysis of the multiple species present. Nevertheless, some species could be tentatively identified including weakly bonded acetylene, two types of strongly bonded acetylenic species and two other further rehybridized species. The prospect for the future application of tunneling spectroscopy to the study of other hydrocarbons adsorbed on model supported metal catalysts is discussed. (Author).