Effect of the composition and structural and size characteristics of composites based on stabilized zirconia and transition metal (Cu, Co, Ni) oxides on their catalytic properties in methane oxidation reactions

• Published in: Kinetics and catalysis Vol. 55; no. 5; pp. 599 - 610
• Main Authors: Orlyk, S. N., Shashkova, T. K.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-09-2014
• Subjects: Catalysis; Chemistry; Chemistry and Materials Science; Physical Chemistry; Temperature Program Reduction; Oxide Composite; Methane Oxidation; Methane Conversion; Sulfur Dioxide
• ISSN: 0023-1584; 1608-3210
• DOI: 10.1134/S0023158414050140

The effects of transition metal (Cu, Co, Ni) oxides and platinum-group metals (Pt, Pd, Rh) in composites based on Y(Sc)-stabilized zirconia on their catalytic properties (activity, selectivity, sulfur resistance) and service life characteristics (thermal stability, performance stability) in methane oxidation reactions have been investigated. The high activity of the composites (75–99% methane conversion at 600–800°C) correlates with the amount and mobility of surface oxygen in these materials. The promoting effect of the platinum-group metals depends on the composition of the reaction medium (on whether it corresponds to the partial or total methane oxidation and on whether it contains sulfur dioxide).