Hydrotalcite-derived Co-containing mixed metal oxide catalysts for methanol incineration Role of cobalt content, Mg/Al ratio and calcination temperature
Basag, S; Kovanda, F; Piwowarska, Z; Kowalczyk, A; Pamin, K; Chmielarz, L
| HERO ID | 4458623 |
|---|---|
| In Press | No |
| Year | 2017 |
| Title | Hydrotalcite-derived Co-containing mixed metal oxide catalysts for methanol incineration Role of cobalt content, Mg/Al ratio and calcination temperature |
| Authors | Basag, S; Kovanda, F; Piwowarska, Z; Kowalczyk, A; Pamin, K; Chmielarz, L |
| Journal | Journal of Thermal Analysis and Calorimetry |
| Volume | 129 |
| Issue | 3 |
| Page Numbers | 1301-1311 |
| Abstract | The Co-Mg-Al mixed metal oxides were prepared by calcination of co-precipitated hydrotalcite-like precursors at various temperatures (600-800 A degrees C), characterised with respect to chemical (AAS) and phase (XRD) composition, textural parameters (BET), form and aggregation of cobalt species (UV-vis-DRS) and their redox properties (H-2-TPR, cyclic voltammetry). Moreover, the process of thermal decomposition of hydrotalcite-like materials to mixed metal oxide systems was studied by thermogravimetric method combined with the analysis of gaseous decomposition products by mass spectrometry. Calcined hydrotalcite-like materials were tested as catalysts for methanol incineration. Catalytic performance of the oxides depended on cobalt content, Mg/Al ratio and calcination temperature. The catalysts with lower cobalt content, higher Mg/Al ratio and calcined at lower temperatures (600 or 700 A degrees C) were less effective in the process of methanol incineration. In a series of the studied catalysts, the best results, with respect to high catalytic activity and selectivity to CO2, were obtained for the mixed oxide with Co:Mg:Al molar ratio of 10:57:33 calcined at 800 A degrees C. High activity of this catalyst was likely connected with the presence of a Co-Mg-Al spinel-type phases, containing easy reducible Co3+ cations, formed during high-temperature treatment of the hydrotalcite-like precursor. |
| Doi | 10.1007/s10973-017-6348-7 |
| Wosid | WOS:000407309900003 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | Hydrotalcite-like materials; Co-Mg-Al mixed oxide catalysts; Spinel formation; VOC total oxidation; Methanol incineration |