Characterization and reactivity of Ru/single oxides catalysts for the syngas reaction

• Published in: Applied catalysis. A, General General, 2004-10, Vol.274 (1), p.295-301
• Main Authors: Josefina, Pérez-Zurita M., Muriel, Dufour, Yann, Halluin, Anne, Griboval, Lucien, Leclercq, Ginette, Leclercq, Mireya, Goldwasser, Luisa, Cubeiro M., Geoffrey, Bond
• Format: Article
• Language: English
• Subjects: Catalysis; Chemistry; CO hydrogenation; Exact sciences and technology; General and physical chemistry; Ruthenium; Syngas; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; XPS
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/j.apcata.2004.07.013

A series of ruthenium-supported catalysts were prepared and characterised to determine the effect of support interaction in the production of higher alcohol from syngas. Single oxides with various degrees of acidity/reducibility such as MoO 3, ZrO 2, WO 3 and TiO 2 were used as supports. Al 2O 3 was used as reference. XPS and TGA results indicated that, on the studied supports, partial reduction to various extents was attained. The reduction of these supports was very different: while no reduction was observed for Al 2O 3, TiO 2 and ZrO 2, WO 3 was little reduced. MoO 3 being the most reduced support. Catalytic tests indicate that the selectivity towards oxygenates seems to be linked to the reducibility of the support, since with non-easily reducible oxides (Al 2O 3, ZrO 2 and TiO 2) the alcohol production was very low, while higher selectivity was obtained on WO 3 and especially on MoO 3, the reducible oxides. A SMSI effect is invoked.