Phichairatanaphong Orrakanya, Poo-Arporn Yingyot, Chareonpanich Metta, Donphai Waleeporn
KU-Green Catalysts Group, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand.
Synchrotron Light Research Institute, Nakhon Ratchasima 30000, Thailand.
ACS Omega. 2022 Apr 14;7(16):14264-14275. doi: 10.1021/acsomega.2c01016. eCollection 2022 Apr 26.
Catalytic methane decomposition has been considered suitable for the green and sustainable production of high-purity H to help reduce greenhouse gas emissions. This research developed a copper-modified nickel-supported mesocellular silica NiCu/MS() catalyst synthesized at different calcination temperatures to improve the activity and stability in the CH decomposition reaction at 600 °C. Ni and Cu metals were loaded on a mesocellular silica (MS) support using a co-impregnation method and calcined at different temperatures (500, 600, 700, and 800 °C). The NiCu/MS(600) catalyst not only had the highest H yield (32.78%), which was 1.47-3.87 times higher than those of the other NiCu/MS() catalysts, but also showed better stability during the reaction. Calcination at 600 °C helps improve the active nickel dispersion, the reducibility of the NiCu catalyst, and the interaction of the NiCu-MS support, leading to the formation of fishbone and platelet carbon nanofibers via a tip-growth mechanism, resulting in the NiCu metals remaining active during the reaction.
催化甲烷分解被认为适用于绿色可持续地生产高纯度氢气，以帮助减少温室气体排放。本研究开发了一种在不同煅烧温度下合成的铜改性镍负载介孔二氧化硅NiCu/MS(x)催化剂，以提高其在600℃下甲烷分解反应中的活性和稳定性。采用共浸渍法将镍和铜金属负载在介孔二氧化硅（MS）载体上，并在不同温度（500、600、700和800℃）下煅烧。NiCu/MS(600)催化剂不仅具有最高的氢气产率（32.78%），比其他NiCu/MS(x)催化剂高1.47至3.87倍，而且在反应过程中表现出更好的稳定性。600℃煅烧有助于提高活性镍的分散度、NiCu催化剂的还原性以及NiCu-MS载体之间的相互作用，通过尖端生长机制导致鱼骨状和片状碳纳米纤维的形成，使得NiCu金属在反应过程中保持活性。
