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- Title
Alumina supported tungsten hydrides, new efficient catalysts for alkane metathesis.
- Authors
Taoufik, Mostafa; Le Roux, Erwan; Thivolle-Cazat, Jean; Copéret, Christophe; Basset, Jean-Marie; Maunders, Barry; Sunley, Glenn J.
- Abstract
Silica and alumina supported tantalum and tungsten hydrides were tested in alkane metathesis, for comparison of their catalytic properties. In propane metathesis [W]–H/Al2O3 proves to be twice more efficient than the usual [Ta]–H/SiO2 catalyst which is still better than [Ta]–H/Al2O3 and [W]–H/SiO2. Tungsten based catalysts lead to a narrower distribution in the products selectivity and to a higher amount of linear products than [Ta]–H/SiO2. [W]–H/Al2O3 is also a better catalyst than [Ta]–H/SiO2 for butane metathesis but is less efficient with ethane. Whereas the results in the case of propane or butane can involve the higher initial activity and a lower deactivation of the tungsten catalyst, in the case of ethane, mechanistic or kinetic aspects can be envisaged in particular concerning the difficulty to dehydrogenate ethane into ethylene.
- Subjects
ALKANES; METATHESIS reactions; TANTALUM; TUNGSTEN; HYDRIDES; CATALYSIS
- Publication
Topics in Catalysis, 2007, Vol 40, Issue 1-4, p65
- ISSN
1022-5528
- Publication type
Article
- DOI
10.1007/s11244-006-0108-4