Methane OSR over Pt-Ni/δ-Al 2 O 3 : Performance and power law type kinetics
| Autor: | Burcu Selen Caglayan, A. Erhan Aksoylu, Elif Erdinç |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Kinetics Analytical chemistry Energy Engineering and Power Technology 02 engineering and technology Atmospheric temperature range 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Kinetic energy 01 natural sciences Methane 0104 chemical sciences Catalysis Steam reforming chemistry.chemical_compound Fuel Technology chemistry A value 0210 nano-technology Bimetallic strip |
| Zdroj: | International Journal of Hydrogen Energy. 42:20568-20578 |
| ISSN: | 0360-3199 |
| Popis: | Methane oxidative steam reforming (OSR) performance of two bimetallic Pt-Ni/δ-Al 2 O 3 catalysts, having Pt:Ni loadings, 0.2:10 and 0.3:10, were tested first. In the tests, residence time (W/F), carbon-to-oxygen (C/O 2 ) feed ratio, and temperature were used as the experimental parameters. Increase in temperature resulted in direct and indirect - through enhanced TOX yielding higher energy - increase in SR rate. As Pt:Ni metal loading ratio did not lead to significant changes in activity, the preliminary kinetic tests to determine merely kinetically controlled region were conducted over 0.2Pt-10Ni catalyst. Considering the outcomes of the preliminary tests, the kinetic experiments were performed for practical reaction conditions extending up to 20% methane conversion with feed ratio intervals of 4.0 2 −1 and pre-exponential factor as 0.110 μmol mgcat −1 s −1 kPa −2.85 for the 375–450 °C temperature interval. The same analysis performed for a narrower temperature range, 375–425 °C, gave k 0 and E A values as 0.251 μmol mgcat −1 s −1 kPa −2.85 and 29.17 kJ mol −1 , respectively, confirming the high sensitivity of OSR pathway to temperature. |
| Databáze: | OpenAIRE |
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