Preparation and Characterisation of Activated Ni(Mn)/Mg/Al Hydrotalcites for Combustion Catalysis

0166601 - UCHP-M 20020295 RIV NL eng J - Journal Article
Jirátová, Květa - Čuba, Pavel - Kovanda, F. - Hilaire, L. - Pitchon, V.
Preparation and Characterisation of Activated Ni(Mn)/Mg/Al Hydrotalcites for Combustion Catalysis.
Catalysis Today. Roč. 76, č. 1 (2002), s. 43-53. ISSN 0920-5861. E-ISSN 1873-4308.
[European Congress on Catalysis EuropaCat V /5./. Limerick, 02.09.2001-07.09.2001]
R&D Projects: GA ČR GA106/02/0523
Institutional research plan: CEZ:AV0Z4072921
Keywords : hydrotalcites * metal oxide catalysts * methane combustion
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
Impact factor: 2.146, year: 2002

Hydrotalcite-type compounds containing different amounts of Ni2+ and Mg2+ cations (molar ratio Ni2+: Mg2+: Al3+ in brucite-like layers varied as follows: 4 : 0 : 2; 1 : 3 : 2; 2 : 2 : 2) and Mg:Mn:Al hydrotalcite-like compounds with molar ratios 4:2:0, 4:1:1 were prepared by coprecipitation. The products were characterised by chemical analysis and XRD measurements. After calcination at different temperatures properties of the resulting materials (surface area, porous structure, surface concentration of metals by XPS) were examined. From the catalysts calcined at 800 °C Ni4Al2 showed the highest surface area and the highest catalytic activity. The oxidation activity in methane combustion (related to the surface area of mesopores) depended on the amount of surface concentration of nickel or Mn3+component linearly. The lower activity of manganese over nickel in methane combustion was proved.
Permanent Link: http://hdl.handle.net/11104/0063719