LaNi1-xMnxO3 perovskite-type oxides as catalysts precursors for dry reforming of methane
| Autor: | Gustavo Valderrama, Mireya R. Goldwasser, Caribay Urbina de Navarro, Alain Kiennemann |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Carbon dioxide reforming
Process Chemistry and Technology Oxide Nanoparticle chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Methane 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering 0210 nano-technology Carbon Syngas Perovskite (structure) |
| Zdroj: | Applied Catalysis A: General. 565:26-33 |
| ISSN: | 0926-860X |
| DOI: | 10.1016/j.apcata.2018.07.039 |
| Popis: | A series of ternary perovskite-type oxides LaNi1-xMnxO3 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0) were synthesized by the sol–gel resin method in propionic acid, producing solids solutions of perovskite-type structures with crystallite sizes between 15–20 nm. The LaNi1-xMnxO3 catalysts were thoroughly characterized and tested in the catalytic dry reforming of methane (DRM) reaction. It was observed that the presence of Mn in the perovskite-type oxide increases the Ni3+ to Ni0 reduction temperature giving rise to formation of Ni0 nanoparticles on the MnOx-La2O3 matrix. The LaNi1-xMnxO3 with x ≤0.8 showed higher activities and selectivity’s towards syngas during the CH4–CO2 reforming, due to in situ formation of highly dispersed Ni0-metallic nanoparticles on the La2O2CO3-MnO-Mn2O3 solid matrix responsible for the high activity and high resistance to carbon buildup on the catalyst surface. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect