The title bed is developed with in situ cryst. growth of zeolite ZSM-5 on different supports; metallic grids and glass fibers. The materials are characterized by diverse physicochem. methods. The chem. pretreatment of the support is a crucial parameter for regular crystal deposition. Partial oxidn. of benzene to phenol with N2O serves as a model reaction for studying the efficacy of this type of coating. [on SciFinder (R)]