Application of Activated Alumina as Catalyst and Carrier

Alumina used as a catalyst carrier can be summarized into the following types according to its physical and chemical properties and the role of alumina:

(1) High temperature alumina carrier. This type of alumina has a small specific surface area, high temperature resistance, chemical resistance and high mechanical strength, so it can withstand harsh operating conditions. Due to the inertness of alumina, the high-temperature alumina carrier will not become a potential source of activity that causes side reactions and selectivity reduction, nor will it become a potential source of poison for the catalyst system.

(2) Interactive carrier. This type of alumina is the most widely used. It can react with the active components of the catalyst to disperse the active components into the carrier, providing an effective specific surface area and appropriate pore structure for the active components to improve the thermal stability and antitoxic properties of the catalyst.

(3) Act as a synergistic or dual-functional carrier. In addition to serving as a skeleton for active components, this type of alumina also provides a gain effect for the catalytic effect of the catalyst.