关键词: 共沉淀法, 氧化铝, 氧化锆, 二氧化硅, 载体, 挤压

Abstract: ZrO2/SiO2-Al2O3 complex support was prepared by co-precipitation and extrusion respectively, and it was characterized by means of BET, XRD, XPS and NH3-TPD techniques. Test results showed that preparation method had significant influence on the structure and property of the complex support. When ZrO2 was added into the complex support by co-precipitation method, it was propitious to the dispersion of SiO2 on the surface of the complex support and in favor of reducing the binding force between metals and support, thus the prepared catalyst exhibited enhanced hydrogenation activity.

Key words: co-precipitation, alumina, zirconia, silicon dioxide, support, extrusion