Abstract: The mechanical strength, bulk density, pore volume, specific surface, crystalline phase and acidity of hydrogenation catalyst support treated by heat radiation or hot air circulation calcination were characterized and compared using N2 adsorption-desorption,FT-IR,NH3-TPD and XRD. The results showed that the thermal radiation treated support had higher strength and lower density, and the crystal growth process was more stable. The support obtained by hot air circulating calcination technology possessed larger specific surface area, larger proportion of small pores, more suitable acidic center distribution and higher hydrogenation activity.

Key words: hydrogenation catalyst support, alumina hydrate, hot air circulation, hea tradiation