Modification of cobalt spinel catalyst for removal of N2O from nitric acid plant tail gases
VSB-Technical University of Ostrava, Institute of Environmental Technology and Faculty of Metallurgy and Materials Engineering, 17. listopadu 15, 708 33 Ostrava, Czech Republic, Tel.: +420 597 321 532,
Multicomponent K-doped Co-Mn-Al mixed oxide deN2O catalysts were prepared by calcination of Co-Mn-Al layered double hydroxide and following impregnation by KNO3. Tuning of the catalyst properties was guided by catalytic tests of N2O decomposition including the effect of water, oxygen and NOx inhibitors, TPR-H2 and in-situ work function measurements. The optimal composition of the catalyst revealed in the laboratory experiments was successfully reproduced in large scale synthesis and shaping. In the pilot plant tests (130 days), high output in N2O removal from the tail gases of the nitric plant was reached.