SINTERING- A CATALYTIC CHALLENGE IN HETEROGENEOUS CATALYSIS

Catalysts have been used commercially from many years ago and are one of the most important parts of the chemical processes. In this paper the deactivation of heterogeneous catalysts bysintering, an irreversible, slow and inevitable phenomenon and its mechanisms and kinetics arediscussed. Thermal, or thermo-chemical degradation, is probably the main and greatest cause for the deactivation of catalysts, especially for late transition metal particles dispersed on oxides or other supports and begins in the temperature area of 800°–900°C, or in some cases even at lowertemperatures, depending on the materials used.

کلیدواژه ها:

Heterogeneous Catalysts ، Deactivation ، Sintering