Hexane total oxidation on LaMO 3 (M = Mn, Co, Fe) perovskite-type oxides
| Autor: | A. Tofanari, Ida Pettiti, M. Faticanti, R. Spinicci, Piero Porta |
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| Rok vydání: | 2001 |
| Předmět: |
Alkane
chemistry.chemical_classification Chemistry adsorptive properties hexane oxidation lamo3 (m = mn co fe) perovskites Process Chemistry and Technology Inorganic chemistry chemistry.chemical_element Heterogeneous catalysis Oxygen Catalysis law.invention Hexane chemistry.chemical_compound Hydrocarbon law Calcination Physical and Theoretical Chemistry Perovskite (structure) |
| Zdroj: | Journal of Molecular Catalysis A: Chemical. 176:247-252 |
| ISSN: | 1381-1169 |
| DOI: | 10.1016/s1381-1169(01)00264-3 |
| Popis: | LaMO 3 (M=Mn, Fe, Co) perovskites were prepared by calcining the citrate precursors at 800°C for 5 h. PdO 3% /Al 2 O 3 , a largely used combustion catalyst, was also studied for comparison. The catalytic behavior was examined in the hexane total oxidation. The following activity scale was found: LaFeO 3 >LaCoO 3 >LaMnO 3 . >3% PdO/Al 2 O 3 , the three perovskites activating the C H bond cleavage of hexane better than PdO/Al 2 O 3 . At temperature around 250–300°C mobile surface oxygen species are involved in the oxidation process, whereas at T >300°C oxygen mobile species are no more present and so, particularly for LaCoO 3 and PdO/Al 2 O 3 , the activation mechanism becomes more energetic. The activity values were compared with those obtained from the total oxidation of methane. |
| Databáze: | OpenAIRE |
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