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Oscillating syngas production on NiO/YSZ catalyst from methane oxidation
Andrew C Chien1,2, Brian Y Liao1
1Department of Chemical Engineering, Feng Chia University Taichung 40724 Taiwan cyinchien@fcu.edu.tw +886 424510890 +886 424517250 ext 3691.
RSC Advances
|May 6, 2022
Summary
Methane oxidation on NiO/YSZ cermets produces synthesis gas by controlling oxygen flow. Intermittent oxygen supply drives lattice oxygen diffusion and redox cycles for oscillatory syngas generation.
Area of Science:
- Catalysis
- Materials Science
- Chemical Engineering
Background:
- Synthesis gas production is crucial for chemical synthesis and energy.
- Methane oxidation is a key process, but efficient methods are needed.
- Nickel Oxide/Yttria-Stabilized Zirconia (NiO/YSZ) cermets show potential for catalytic applications.
Purpose of the Study:
- To investigate the mechanism of synthesis gas production via methane oxidation on a NiO/YSZ cermet.
- To explore the role of oxygen flow interruption in controlling the reaction.
- To demonstrate a novel catalytic technique applicable to other material systems.
Main Methods:
- Methane oxidation was performed on a NiO/YSZ cermet with controlled interruptions of oxygen flow.
- Infrared spectroscopy and mass spectroscopy were employed to analyze reaction products and intermediates.
- The Ni/NiO redox cycle and oxygen diffusion within the cermet were studied.
Main Results:
- Oscillatory synthesis gas production was achieved by interrupting and resuming oxygen flow.
- Lattice oxygen diffusion and activation on YSZ were identified as key steps.
- The Ni/NiO redox cycle was confirmed as the driving force for syngas generation.
- The reaction mechanism was elucidated using spectroscopic data.
Conclusions:
- Intermittent oxygen supply enables controlled methane oxidation for oscillatory syngas production.
- The NiO/YSZ cermet facilitates syngas generation through lattice oxygen diffusion and redox cycling.
- This technique offers a new approach for catalysis in metal/anion or cation conductor systems.
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