Effect of The Preparation of Ir-Mo/Al2O3 Sulfide Catalyst on Activity and HDN/HDS Selectivity

0166956 - UCHP-M 20040013 RIV NL eng J - Journal Article
Cinibulk, Josef - Gulková, Daniela - Yoshimura, Y. - Vít, Zdeněk
Effect of The Preparation of Ir-Mo/Al2O3 Sulfide Catalyst on Activity and HDN/HDS Selectivity.
Applied Catalysis A - General. Roč. 255, č. 2 (2003), s. 321-329. ISSN 0926-860X. E-ISSN 1873-3875
R&D Projects: GA AV ČR IAA4072103
Institutional research plan: CEZ:AV0Z4072921
Keywords : hydrodenitrogenation * hds * iridium
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 2.825, year: 2003

Two series of Ir-Mo/alumina catalysts were prepared by deposition of Ir4(CO)12 on oxidic and sulfidic Mo/alumina catalyst. The catalysts were tested in the HDN of pyridine and HDS of thiophene and characterized by TPR, transmission electron microscopy (TEM) and X-ray diffraction. Ir addition had positive effect on both reactions. A much larger effect on HDS activity was observed when Ir was deposited on presulfided instead of oxidic Mo catalyst. Catalysts prepared in this way displayed a promotive effect of about 3 in HDS and between 2-3 in HDN. The larger increase of HDS activity was explained by improved contact between Ir and Mo sulfide phases.
Permanent Link: http://hdl.handle.net/11104/0001392