Abstract

PARRA, Ronald; PUELLO-POLO, Esneyder  and  BRITO, Joaquín. EFFECT OF THE CARBURIZATION WITH CH ₄ /H ₂ OF (NH ₄ ) ₄ [NIMO ₃ W ₃ O ₂₄ H ₆ ]•5H ₂ O AND (NH ₄ ) ₄ [NIMO ₆ O ₂₄ H ₆ ]•5H ₂ O ON THIOPHENE HYDRODESULFURIZATION. Iteckne [online]. 2018, vol.15, n.1, pp.17-23. ISSN 1692-1798.  https://doi.org/10.15332/iteckne.v15i1.1960.

In this work-was studied the effect of the carburization with CH4(20%Vol.)/H2 of (NH4)4[NiMo6-xWxO24H6]•5H2O Anderson type polyoxometalates with (AR) atomic ratio = 1:6:0 and 1:3:3 on the thiophene hydrodesulfurization reaction. The carburized solids were characterized by XRD, textural properties (ABET, Vp y Dp), FT-IR and (CHNO-S) elemental analysis. XRD showed signals of β-Mo2C, NiC, β-W2C and β-WC. Carburized materials presented type IV isotherms and hysteresis loop H2 and H3, the specific surface area was between 3 and 6 m2/g, and pore size between 9 and 14 nm. The FT-IR analysis of carbides showed signals of Mo-O2 and O-H. The catalytic activity of trimetallic catalyst was higher than that of bimetallic catalyst: NiMo3W3-C (30%) > NiMo6-C (23%), while the selectivity was directed toward the formation of 1,3 butadiene by NiMo3W3-C and 1-butene and cis-butene by NiMo6-C.

Keywords : Thiophene hydrodesulfurization; Anderson type heteropolyoxometalates; Ni-Mo-W carbides atomic ratios.

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