Effect of the carburization with CH4/H-2 of (NH4)(4)[NiMo3W3O24H6]center dot 5H(2)O AND (NH4)[NiMo6O24H6]center dot 5H(2)O on thiophene hydrodesulfurization

In this work-was studied the effect of the carburization with CH4(20%Vol.)/H-2 of (NH4)(4)[NiMo(6-x)WxO(24)H(6)]center dot 5H(2)O 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 (A(BET), V-p y D-p), FT-IR and (CHNO-S) elemental analysis. XRD showed signals of beta-Mo2C, NiC, beta-W2C and beta-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-O-2 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.