Mechanical vibration reactor achieves CO2 methanation assisted by ruthenium modified nickel milling balls

A mechano-catalysis approach is introduced into “heterogeneously catalyzed gas phase reaction” with continuous gas flow, and Ruthenium (Ru) doped Nickel (Ni) milling balls (Ru/Ni) serve as CO 2 methanation catalyst. Under mechanical vibration conditions, Ru/Ni presented a state-of-the-art TOF CH4 of 15995.6 h −1 and higher CH 4 selectivity (>95%) at 340 ∼ 390 ℃. Compared with conventional Ru-Ni/Al 2 O 3 catalyst, Ru/Ni also exhibited intact Ru-Ni structure without deactivation and coke formation over 200 hrs. The surface and spatial distribution of Ru species on Ni substrate were studied by XRD, SEM, XPS, TOF-SIMS and XANES . In situ DRIFTs were also conducted to examine the reaction intermediates and boosting impact of Ru species on hydrogenation ability, and the advantages of mechanical vibration reactor for CO 2 methanation are proposed finally. This work pioneers a new idea for low energy consumption and high efficiency CO 2 hydrogenation.