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Stabilisation of β-NiMoO4 in TiO2-supported catalysts

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: R. Zãvoianu, C.R. Dias, M.F. Portela

Editorial: Catalysis Communications, 2, p.37-42, 2001.

Rezumat:

NiMoO4 catalysts supported on TiO2 (anatase) were prepared using two procedures: (i) wet impregnation of the support with an aqueous suspension of NiMoO4 and (ii) direct precipitation of NiMoO4 on the support surface using solutions of nickel nitrate and ammonia heptamolybdate. The catalysts and their precursors were characterised by XRD and TG/DTA and the catalytic behaviour of TiO2-supported NiMoO4 for the oxidative dehydrogenation of isobutane was compared to that of unsupported NiMoO4.
Results show that, in TiO2-supported catalysts, β-NiMoO4 is stabilised even at room temperature. The catalyst with higher amount of β-NiMoO4 shows higher selectivity to isobutene and less coke formation.

Cuvinte cheie: NiMoO4, TiO2, oxidative dehydrogenation, isobutane

URL: http://www.sciencedirect.com.ux4ll8xu6v.useaccesscontrol.com/science/article/pii/S1566736701000048