Preparation of Mo/Al2O3 Sulfide Catalysts Modified by Ir Nanoparticles

0166682 - UCHP-M 20020134 RIV NL eng J - Journal Article
Cinibulk, Josef - Vít, Zdeněk
Preparation of Mo/Al2O3 Sulfide Catalysts Modified by Ir Nanoparticles.
Studies in Surface Science and Catalysis. Roč. 143, - (2002), s. 443-451. ISSN 0167-2991.
[International Symposium Scientific Bases for the Preparation of Heterogeneous Catalysts /8./. Louvain-la-Neuve, 09.09.2002-12.09.2002]
R&D Projects: GA AV ČR IAA4072103
Keywords : catalysts modified * sulfide catalysts * Mo/Al2O3
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 3.468, year: 2002

Preparation and catalytic properties of Ir/alumina and Ir-Mo/alumina sulfide catalyst were studied in hydrodenitrogenation (HDN) of pyridine and hydrodesulfurization (HDS) of thiophene. The Ir added to a Mo/alumina catalyst is amount 0.1-0.8 wt % increased activities in both reactions by a factor of about 2-3. The main factors, leading to improvement of activity of modified Ir-Mo catalysts, were Ir dispersion, and amount and of the Mo phase before Ir deposition, i.e. whether oxidic or sulfided and the way of catalyst activation. The effects of starting Ir compounds and deposition order of Ir and Mo seem to be of a smaller importance.
Permanent Link: http://hdl.handle.net/11104/0063797