Catalytic Decomposition of Nitrous Oxide on nano-sized Palladium Catalysts: The influence of Precursor and the Method of Preparation
Advancing the chemical engineering fundamentals
Catalysis (T2-13P)
Keywords: N2O decomposition; Temperature-programmed reduction; X- ray diffraction; Pd catalyst; DRIFTS.
CATALYTIC DECOMPOSITION OF NITROUS OXIDE ON NANO-SIZED PALLADIUM CATALYSTS: THE INFLUENCE OF PRECURSOR AND THE METHOD OF PREPARATION
P. Siva Sankar Reddy, N. Lingaiah, P. S. Sai Prasad ,
I & PC Division, Indian Institute of Chemical Technology, Hyderabad 500 007, India
I.V.Rao*
College of Technology, Osmania University, Hyderabad 500 007, India
Abstract
Alumina-supported palladium catalysts were prepared by the deposition–precipitation (DP) and impregnation (IMP) methods. The DP catalysts showed higher activity than those of their IMP analogues for decomposition of nitrous oxide. The DRIFTS analysis revealed preferential formation of partially oxidized Pd+1 species on the surface of DP-Cl catalyst. The temperatures at which the peak maxima appeared were higher in the TPR patterns of the DP-Cl catalysts, indicating greater interaction between Pd and alumina leading to formation of cationic Pd species. The high activity of DP-Cl catalyst prepared by DP method is related to the formation of electron deficient Pd sites during the preparation and their occupancy in the octahedral vacancies of alumina. Kinetic analysis has been carried out on these catalysts in the reaction temperature range 200-400 oC. The performance of the catalysts is explained in terms of the respective activation energies.
* Corresponding author: Tel NO: -91-40-27098901; fax: -91-40-27098472
See the full pdf manuscript of the abstract.
Presented Wednesday 19, 13:30 to 15:00, in session Catalysis (T2-13P).
