Iron carbide or iron carbide/cobalt nanoparticles for magnetically-induced CO₂ hydrogenation over Ni/SiRAlOx catalysts

Abstract

Magnetic nanoparticles have been used as heating agents in CO2 methanation under continuous flow catalyzed by nickel nanoparticles (Ni/SiRAlOx).

Engineering Iron–Nickel Nanoparticles for Magnetically Induced CO2Methanation in Continuous Flow

“…NPs 2/SiRAlOx were characterized by STEM-EDX at the end of the reaction (Supporting Information, Figure S16). Most of the NPs were sintered as observed with the catalytic system composed by Fe 2.2 C NPs supported on Ni/SiRAlOx previously reported in our group, [5] but interestingly, their optimized catalytic performances are preserved. Finally, stability of NPs 2/ SiRAlOx was evaluated.…”

“…The spatial separation of the heating agent and the catalyst, by depositing Fe 2.2 C NPs on an inorganic support previously impregnated Ru or Ni NPs, led to CH 4 yields higher than 90 % at low magnetic field (ca. 20 mT) . Almost simultaneously, Mortensen et al .…”

“…Magnetic induction has recently appeared as an alternative heating source for heterogeneous catalytic reactions . It consists in applying high‐frequency alternating magnetic fields to ferromagnetic materials to release heat through hysteresis losses.…”

“…Magnetic induction has recently appeared as an alternative heating source for heterogeneous catalytic reactions. [1][2][3][4][5][6][7][8][9] It consists in applying high-frequency alternating magnetic fields to ferromagnetic materials to release heat through hysteresis losses. The target temperature is reached within few seconds and the energy is directly transferred inside the material without the need for heating the whole reactor system.…”

“…20 mT). [4,5] Almost simultaneously, Mortensen et al [15,16] and Varsano et al [17] demonstrated that NiCo NPs could be used as both an heating agent and a catalyst for steam methane reforming under magnetic field, leading to excellent catalytic results (95 % of H 2 yield). In parallel, induction heating of ferromagnetic iron oxide-based NPs has been used to heat reactions in solution.…”