SÍNTESIS Y CARACTERIZACIÓN DE (NH4)4[NiMo6O24H6]•7H2O/V2O5/Al2O3–ZnO PARA LA DESULFURACIÓN OXIDATIVA DE MEZCLAS DE DIBENZOTIOFENO
DOI:
https://doi.org/10.15665/rp.v20i2.2944Keywords:
polyoxomolybdates, Oxidative desulfurization, ɣ-Al2O3-ZnO, DBTAbstract
Synthesis of NiMo Anderson-type polyoxomolybdates supported on ZnO-modified V2O5/Al2O3 was evaluated in the oxidative desulfurization of DBT. The catalyst was characterized by XRF, B.E.T specific area, FTIR, surface acidity by potentiometric titration with n-Butylamine and SEM-EDS. XRF analysis revealed no significant changes between the experimental (Ni:Mo 1:7) and theoretical (Ni:Mo 1:6) molar ratios. The BET specific area followed the order ɣ-Al2O3 (207m2/g) > ɣ-Al2O3-ZnO (185m2/g) > VNiMo/ɣ-Al2O3-ZnO (74m2/g) > VNiMo/ɣ-Al2O3 (56m2/g). FTIR showed bands of Mo-O2 and N-H bonds assignable to polyoxomolybdates. The VNiMo/ɣ-Al2O3 catalyst (57.7 µeq/m2) has a higher density of acid sites than the VNiMo/ɣ-Al2O3-ZnO catalyst (38.2 µeq/m2). SEM revealed laminar texture and irregular morphology, while its EDS analysis indicates the presence of elements that constitute solids: V, Ni, Mo, Al, Zn.
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