Preparation and investigation of properties of methane dehydroaromatization catalysts based on ZSM-5 zeolites and Mo nanopowders

The Mo/ZSM-5 catalysts using various forms (Na-, NH4- and H-form) of the ZSM-5 high-silica zeolite are prepared for the non-oxidative conversion of methane. It is shown that the physicochemical and catalytic properties of the systems under study depend on the form of zeolite and the number of heat treatments used in the course of their preparation. The SiK and MoL distribution profiles for catalysts obtained on the basis of NH4 and hydrogen zeolites are studied. It is shown that the catalyst obtained on the basis of NH4 zeolite is characterized by a more uniform distribution of molybdenum in zeolite particles. It is also established that the Mo/ZSM-5 catalyst prepared using NH4 zeolite exhibits the highest catalytic activity in the methane dehydroaromatization reaction.