TEXTURAL STABILITY AS A CHARACTERIZATION TOOL OF HIGH-TEMPERATURE CATALYSTS

Factors, both physical and chemical, influencing the pore-structure st ability of high temperature catalysts and/or catalyst supports were di scussed with a view to formulate strategies to design and develop high temperature catalyst supports. Factors influencing the sintering beha vior and techniques to manipulate them are discussed. Chemical ways of modifying porosity reduction behavior can lead to changes in catalyti c behavior. Therefore several physical techniques like control of pack ing and coordination by post precipitation treatment and nanocomposite formation, changing particle morphology and introducing rigid constra ints were discussed.