梯度孔分布氧化铝载体的制备工艺研究

Aluminium oxide is one of the most common catalyst supports, which can improve the performance of the catalyst enormously relying on its reasonable pore structure and suitable pore size distribution. In order to optimize the pore size distribution, different template agents were used in experiments, and aluminium oxide supports with different hierarchical pore distribution were prepared by reaming. The effects of combination modes of template agent, the amount of template agent, water/powder quality ratio and calcination temperature on the pore size distribution of aluminium oxide support were investigated, and aluminium oxide supports were characterized by nitrogen adsorption/desorption isotherms and high pressure mercury porosimetry. The experimental results show that the effect of combination modes of template agent on pore size distribution is the most obvious. Aluminium oxide support with reasonable pore size distribution was prepared by adding three different sizes of carbon black to optimize pore structure, which potentially can be applied for improving the performance of catalysts.