Partial oxidation of methane over Ni 0 /La 2 O 3 bifunctional catalyst IV: Simulation of methane total oxidation, dry reforming and partial oxidation using the Quasi-Steady State Approximation
| Autor: | Tri Huu Nguyen, Gérald Djéga-Mariadassou, Andrzej Krztoń, Agata Łamacz |
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| Rok vydání: | 2016 |
| Předmět: |
Carbon dioxide reforming
Process Chemistry and Technology Kinetics Thermodynamics 02 engineering and technology Rate equation 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Methane 0104 chemical sciences Bifunctional catalyst chemistry.chemical_compound chemistry Catalytic cycle Organic chemistry Partial oxidation 0210 nano-technology General Environmental Science |
| Zdroj: | Applied Catalysis B: Environmental. 199:424-432 |
| ISSN: | 0926-3373 |
| Popis: | Simulations of methane total oxidation (TOM) at 873 K on La 2 O 3 and dry reforming (DRM) at 693 K reactions over Ni 0 /LaO 3 were calculated for low and high conversions of reactants, based on experimental power rate law equations described in a previous paper and classical kinetics. According to Boudart’s school approach of Classical Kinetics, kinetic rate equations of TOM and DRM reactions were then established based on the Quasi-Steady State Approximation (QSSA) theory. The concept of two-step sequences was used for TOM and DRM which occur in the indirect process of partial oxidation of methane (POM). The QSSA simulation of POM process was subsequently developed at 1053 K and compared to the simulation of TOM, at the same temperature, to kinetically demonstrate that the TOM catalytic cycle is the rate determining cycle (rdc) of the POM process. Synthesis of a novel POM catalyst in the future can be based on the present model and conclusion, taking into account that the methane combustion reaction provides the rate determining catalytic cycle (rdc) of the overall POM process. |
| Databáze: | OpenAIRE |
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