Chien Andrew C, Liao Brian Y
Department of Chemical Engineering, Feng Chia University Taichung 40724 Taiwan
Green Energy Development Center, Feng Chia University Taichung 40724 Taiwan.
RSC Adv. 2020 Jul 16;10(45):26693-26698. doi: 10.1039/d0ra02051f. eCollection 2020 Jul 15.
Synthesis gas was produced by methane oxidation on a NiO/YSZ cermet by interrupting the oxygen flow. Stopping the oxygen flow provoked the diffusion of lattice oxygen in the cermet, which in turn replenished the Ni-O bond that was consumed by methane. Resuming the oxygen flow brought about the activation of oxygen on the extrinsic vacancy site of YSZ. The activation, followed by the diffusion of oxygen and a Ni/NiO redox cycle, led to oscillatory syngas production. The infrared and mass spectroscopy results provide the reaction mechanism that governs the oxidation of methane on the NiO/YSZ cermet. This study presents a technique that can be applied to the catalysis of other metal/anion or cation conductor systems.
通过中断氧气流，在NiO/YSZ金属陶瓷上进行甲烷氧化反应来生产合成气。停止氧气流会引发金属陶瓷中晶格氧的扩散，进而补充被甲烷消耗的Ni - O键。恢复氧气流会使YSZ的外在空位上的氧活化。这种活化，随后是氧的扩散以及Ni/NiO氧化还原循环，导致合成气的振荡产生。红外光谱和质谱结果提供了控制NiO/YSZ金属陶瓷上甲烷氧化反应的反应机理。本研究提出了一种可应用于其他金属/阴离子或阳离子导体体系催化的技术。
