Mechanochemical approach for preparation of Mo-containing image-zeolite Original Research Article

The catalytically active solid materials were prepared by mechanochemical synthesis and impregnation. The starting material used as a support was ββ-zeolite with a ratio SiO2/Al2O3=66SiO2/Al2O3=66. The molybdenum precursor was 12-molybdophosphoric heteropoly acid (HPMo). The samples were characterized by TPR and IR methods. The test reaction was thiophene hydrodesulfurization at atmospheric pressure. The interaction between HPMo and ββ-zeolite in the catalyst sample, prepared by mechanochemical synthesis, is a weak one compared to that in the sample obtained on the basis of impregnation. The hydrodesulfurization activity of the milling sample is stabilized at a level about 50% higher than that of the sample prepared by impregnating HPMo on ββ-zeolite. The higher hydrogenating activity of the mechanochemically treated sample is an additional advantage.