Bikogiannakis Alexandros K, Lymperi Andriana, Dimitropoulos Paraskevas, Bourikas Kyriakos, Katsaounis Alexandros, Kyriakou Georgios
Department of Chemical Engineering, University of Patras, 26504 Patras, Greece.
Institute of Chemical Engineering Sciences, Foundation for Research and Technology, 26504 Patras, Greece.
Molecules. 2025 May 12;30(10):2135. doi: 10.3390/molecules30102135.
The CO (Dry) Reforming of Methane (DRM) is a key process for reducing CO and CH emissions while producing syngas with an H/CO ratio of 1, ideal for Fischer-Tropsch synthesis. This study explores DRM and the Reverse Water Gas Shift (RWGS) reaction under mild conditions using Ru-based catalysts supported on CeO, YSZ, TiO, and SiO, with three reactant ratios: (i) stoichiometric, PCO = 1 kPa, PCH = 1 kPa, (ii) oxidizing, PCO = 2 kPa, PCH = 1 kPa, and (iii) reducing, PCO = 1 kPa, PCH = 4 kPa. The results highlight the importance of redox support for catalyst stability, with mobile lattice oxygen aiding carbon gasification. While Ru/CeO is stable at high temperatures, it rapidly deactivates at low temperatures, emphasizing the need for precise metal particle size control. This work demonstrates the necessity of fine-tuning catalyst properties for more sustainable DRM, offering insights for next-generation CO utilization catalysts.
甲烷干重整（DRM）是减少一氧化碳（CO）和甲烷（CH）排放的关键过程，同时可生产出氢碳比为1的合成气，这对于费托合成来说是理想的。本研究探索了在温和条件下，使用负载在CeO、YSZ、TiO和SiO上的钌基催化剂进行DRM和逆水煤气变换（RWGS）反应，采用了三种反应物比例：（i）化学计量比，PCO = 1 kPa，PCH = 1 kPa；（ii）氧化型，PCO = 2 kPa，PCH = 1 kPa；（iii）还原型，PCO = 1 kPa，PCH = 4 kPa。结果突出了氧化还原载体对催化剂稳定性的重要性，其中可移动的晶格氧有助于碳气化。虽然Ru/CeO在高温下稳定，但在低温下会迅速失活，这强调了精确控制金属颗粒尺寸的必要性。这项工作证明了微调催化剂性能以实现更可持续的DRM的必要性，为下一代CO利用催化剂提供了见解。
