Resumo

PUELLO-POLO, Esneyder; ROMERO-BANOS, Melissa  e  FALS, Jayson. Catalytic precursors of β zeolite supported anderson-evans type femo, como and nimo polyoxometalates on thiophene hydrodesulfurization. Prospect. [online]. 2018, vol.16, n.1, pp.34-40. ISSN 1692-8261.  https://doi.org/10.15665/rp.v16i1.1298.

The catalytic precursors of β zeolite supported Anderson-Evans type FeMo, CoMo and NiMo polyoxometalates on thiophene hydrodesulfurization (HDS) was investigated. The solids were characterized by elemental analyses (ICP plasma), surface area (SBET), X-ray diffraction (XRD) and infrared spectroscopy (FTIR). The support was impregnated with an aqueous solution of Anderson-Evans type FeMo, CoMo and NiMo polyoxometalates. Elemental analyses for Fe, Co, Ni and Mo gave results for all compounds in agreement, within experimental accuracy, with the nominal atomic ratio for each precursor. The presence of β zeolite, (NH4)3(FeMo6O24H6)•7H2O, (NH4)3(CoMo6O24H6)•7H2O and (NH4)4(NiMo6O24H6)•5H2O was verified by XRD, whereas FTIR analysis could be assigned the stretching and bending of the functional groups present in the structure of Anderson-Evans polyoxomolibdate and β zeolite. FeMo6/ zeolita β, CoMo6/zeolita β and NiMo6/zeolita β catalytic precursors showed higher values of surface area (204-268 m2/g) than the Anderson-Evans type polyoxometalates (1-3 m2/g). The catalysts derived from β zeolite supported Anderson-Evans type FeMo, CoMo and NiMo polyoxometalates showed higher HDS activity than those obtained from precursors unsupported (FeMo6/zeolita β and CoMo6/zeolita β), which was associated with the formation of the largest number of active sites.

Palavras-chave : Anderson-Evans polyoxomolibdate; β zeolite; FeMo, CoMo and NiMo; Thiophene hydrodesulfurization.

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