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Effect of the introduction of niobium carbide on non-oxidative dehydro-aromatization of methane over MoMCM-22

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Abstract

The effect of the introduction of niobium carbide was studied on the dehydro-aromatization of methane over a molybdenum containing HMCM-22 zeolite at 973 K. The introduction of niobium decreased Brønsted acidity, affecting catalyst behavior on the dehydro-aromatization of methane. Niobium carbide containing zeolite showed lower activity, lower coke deposition and predominant formation of naphthalene, in the expenses of benzene, the major product observed for Mo containing zeolite. Besides carbidic carbon, two other types of coke were observed: one associated to molybdenum and the other associated to Brønsted acid sites located both on the catalyst surface and inside zeolite pores.

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  1. Alexandre Carlos Camacho Rodrigues

    Present address: ANP, Agência Nacional de Petróleo, Gás Natural e Biocombustíveis, Rio de Janeiro, Brazil

Authors and Affiliations

  1. NUCAT/PEQ/COPPE/UFRJ, P.O. Box 68502, Rio de Janeiro, 21945-970, Brazil

    Alexandre Carlos Camacho Rodrigues & José Luiz Fontes Monteiro

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  1. Alexandre Carlos Camacho Rodrigues
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  2. José Luiz Fontes Monteiro
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Correspondence to Alexandre Carlos Camacho Rodrigues.

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Rodrigues, A.C.C., Monteiro, J.L.F. Effect of the introduction of niobium carbide on non-oxidative dehydro-aromatization of methane over MoMCM-22. Reac Kinet Mech Cat 105, 441–450 (2012). https://doi.org/10.1007/s11144-011-0401-5

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  • DOI: https://doi.org/10.1007/s11144-011-0401-5

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