Synthesis of organized mesoporous alumina by high gravity technology
Organized mesoporous alumina was synthesized in a rotating packed bed(RPB) by the traditional precipitation method.Aluminum nitrate was used as the source of aluminum,ammonium carbonate was used as precipitator,and polyethylene glycol 1540(PEG 1540) was used as template.Then the effects of rotation speed,reactant mixing style,temperature and the addition rate of precipitator on the structure of mesopores were investigated.The experimental results indicated that the structure of mesoporous alumina was controlled by the high gravity technology.High surface area,narrow pore size distributions and ordered wormlike pores were obtained,and the high gravity technology had a significant effect on pore structure in the synthesis of mesoporous alumina.