For a sample of zeolite which has undergone heat treatments (ion exchange, impregnation) presents a drx diagram without peaks, but during the reaction gave an acceptable yield; explanations thank you.
You question is obvious, but what you mean heat traitement with ions exchange and impregnation. You are heated your zeolite sample and treated it, it's correct? And, when you have characterized it with XRD , you don't find any peaks, I don't understand which peak you mean ? Another peak after traitement?
For appropriate answer you must define concrete type of zeolite that you use (there is more than 250 zeolite structure today), substances used for ion-exchange and impregnation, and the temperature used for heat treatment. Moreover, even amorphous alumosilicates, that can be obtained after amorhisation of zeolites under specified conditions, could be catalytically active.