Pore structure and hydrothermal stability control strategies of spherical γ-Al2O3 carrier
Supported catalysts have been widely used in important fields such as petrochemicals and fine chemicals,in which the carrier plays an important role.Porous spherical alumina carrier accounts for the largest share in industrial carriers due its numerous crystal forms,excellent pore structure,and stable chemical properties.However,its performance is closely related to the corresponding pore structure and hydrothermal stability.Herein,the recent research progress,home and abroad,on the pore structure and the corresponding hydrothermal stability control strategies of spherical alumina was summarized,with the pore structure regulation rules analyzed from the aspects of Al2O3 precursor,oil ammonia column forming process,and post-treatment,while regulation strategies from regulation mechanism and enhancement methods of alumina pore structure hydrothermal stability,such as surface hydroxyl passivation and γ-Al2O3 content.Some suggestions were put forward for the future development of domestic high-end spherical alumina industrial carriers.
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