Effect of Preparation Method on Catalytic Properties of Co-Mn-Al Mixed Oxides for N2O Decomposition.

0467588 - ÚCHP 2017 RIV NL eng J - Journal Article
Klyushina, A. - Pacultová, K. - Karásková, K. - Jirátová, Květa - Ritz, M. - Fridrichová, D. - Volodorskaja, A. - Obalová, L.
Effect of Preparation Method on Catalytic Properties of Co-Mn-Al Mixed Oxides for N2O Decomposition.
Journal of Molecular Catalysis A-Chemical. Roč. 425, DEC 15 (2016), s. 237-247. ISSN 1381-1169
R&D Projects: GA ČR GA14-13750S
Institutional support: RVO:67985858
Keywords : Co-Mn-Al mixed oxide * N2O decomposition * preparation methods
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
Impact factor: 4.211, year: 2016

Co-Mn-Al mixed oxides (Co:Mn:Al molar ratio of 4:1:1) were prepared by three different methods (i) calcination of hydrotalcite-like precursors (Co-Mn-Al-HT-ex), (ii) calcination of corresponding nitrates (Co-Mn-Al-nitr) and (iii) calcination of the product of mechanochemical reaction of Co, Mn, Al nitrates with NH4HCO3 (Co-Mn-Al-carb). Different conditions of synthesis led to the formation of spinel-like phase with different structural properties leading to different catalytic activity.N2O conversions decreased with decreasing specific surface area in order Co-Mn-Al-carb > Co-Mn-Al-HT-ex > Co-Mn-Al-nitr. Highest catalyst activity was determined by the lowest bond strength of active site − oxygen while specific surface area and amount of active sites per unit surface were not decisive parameters for activities order.
Permanent Link: http://hdl.handle.net/11104/0267709