Catalytic Decomposition of Nitrous Oxide over Calcined Hydrotalcite-like Compounds

0166534 - UCHP-M 20020223 RIV CZ eng C - Conference Paper (international conference)
Obalová, L. - Kovanda, F. - Jirátová, Květa - Chmielová, M. - Wichterle, K. - Dorničák, V.
Catalytic Decomposition of Nitrous Oxide over Calcined Hydrotalcite-like Compounds.
Summaries. Vol. 1. Prague: Process Engineering Publisher, 2002, s. 356. ISBN 80-86059-33-2.
[International Congress of Chemical and Process Engineering CHISA 2002 /15./. Prague (CZ), 25.08.2002-29.08.2002]
R&D Projects: GA ČR GA106/02/0523
Institutional research plan: CEZ:AV0Z4072921
Keywords : nitrous oxide * catalytic decomposition * hydrotalcite
Subject RIV: CI - Industrial Chemistry, Chemical Engineering

Mixed oxide based catalysts prepared by the thermal decomposition of Hydrotalcite-like compounds were used in catalytic decomposition of nitrous oxide into nitrogen and oxygen. The catalytic reaction was performed in a fixed-bed reactor at 1000 ppm N2O inlet concentration in the temperature range 603 - 723 K. Ni and Co-containing catalysts showed high activity in nitrous oxide decomposition. A very poor activity was observed for Mg-Al mixed oxide catalyst. The prepared catalysts were characterized by the thermal analysis, powder X-ray diffraction, infrared spectroscopy, BET surface area measurement, temperature-programmed reduction and temperature-programmed desorption. The determined reaction rate constants of N2O decomposition were approximately proportional to the amount of reducible components and inversely proportional to the amount of strong basic centres of catalyst.
Permanent Link: http://hdl.handle.net/11104/0063657