Development of a rotating reactor for uniform solid treatments: Application to the steaming of HY zeolites

A laboratory scale rotating reactor designed for high temperature treatments of powders under controlled atmosphere is described. It was used for HY zeolite steamings. This rotating reactor allowed the lattice dealumination level to be governed with a good accuracy and to minimize concomitant amorphization. A series of well-defined steamed HY zeolites characterized by their lattice Si/Al ratio varying from 7.6 to 40 was obtained.