Spatially Formed Tenacious Nickel-Supported Bimetallic Catalysts for CO2 Methanation under Conventional and Induction Heating

The paper introduces spatially stable Ni-supported bimetallic catalysts for CO2 methanation. The catalysts are a combination of sintered nickel mesh or wool fibers and nanometal particles, such as Au, Pd, Re, or Ru. The preparation involves the nickel wool or mesh forming and sintering into a stable shape and then impregnating them with metal nanoparticles generated by a silica matrix digestion method. This procedure can be scaled up for commercial use. The catalyst candidates were analyzed using SEM, XRD, and EDXRF and tested in a fixed-bed flow reactor. The best results were obtained with the Ru/Ni-wool combination, which yields nearly 100% conversion at 248 degrees C, with the onset of reaction at 186 degrees C. When we tested this catalyst under inductive heating, the highest conversion was observed already at 194 degrees C.

Automated summary

The paper presents the development of spatially stable Ni-supported bimetallic catalysts for CO2 methanation. The catalysts consist of sintered nickel mesh or wool fibers and nanometal particles (Au, Pd, Re, or Ru). A scalable preparation method involving forming and sintering of the nickel wool or mesh, followed by impregnation with metal nanoparticles generated by a silica matrix digestion method, is proposed. The catalyst candidates are characterized by SEM, XRD, and EDXRF, and tested in a fixed-bed flow reactor. The Ru/Ni-wool combination exhibits the best performance, achieving nearly 100% conversion at 248 degrees C, with the reaction onset at 186 degrees C. Notably, under inductive heating, the catalyst shows the highest conversion at a lower temperature of 194 degrees C.