Promoted Ru/Al₂O₃ catalysts with improved low‐temperature activity for CO₂ methanation reaction

Abstract

Catalytic thermal hydrogenation of CO2 to CH4 is one of the promising decarbonization technologies, and Ru is considered to be the most active metal for low‐temperature CO2 methanation. In this work, a series of metal‐promoted Ru‐based catalysts were prepared by the impregnation–precipitation method. The catalyst composition, reduction temperature, reaction gas concentration, and reaction conditions were optimized. The reaction mechanism was investigated through CO‐DRIFTS experiments. It was found that the addition of Pt could promote the adsorption of CO on the surface of ruthenium‐based catalysts, which was beneficial to the methanation reaction. In addition, in situ DRIFTS experiments observed surface species of catalysts during the reaction, and it was concluded that bicarbonate was the intermediate species of the reaction. © 2023 Society of Chemical Industry and John Wiley & Sons, Ltd.

Ni‐Based Catalysts for CO2 Methanation: Exploring the Support Role in Structure‐Activity Relationships

“…Metal-based catalysts, for instance, ruthenium (Ru) and nickel (Ni) are usually favored as active phase elements for CO 2 conversion to CH 4 . [12][13][14][15] Ru being a noble metal is uneconomical to be applied in high-grid industrial applications. Ni is inexpensive and widely available, it also possesses high activity when used in CO 2 methanation.…”

“…Metal‐based catalysts, for instance, ruthenium (Ru) and nickel (Ni) are usually favored as active phase elements for CO 2 conversion to CH 4 [12–15] . Ru being a noble metal is uneconomical to be applied in high‐grid industrial applications.…”

Low-temperature methanation of fermentation gas with Ni-based catalysts in a multicomponent system

“…Among the many catalysts based on Ni, Ru, Fe, and Co, Ni has the most comprehensive advantages in efficiency and price. Thus, it has been studied and applied extensively [ 11 – 14 ]. However, Ni-based catalysts still have the disadvantages of easy deactivation and poor thermal stability.…”

Facile surface restructure by one-step sub-millisecond laser exposure promotes the CO2 methanation performance of cobalt oxide supported Pd nanoparticles with copper-oxide cluster decoration

“…Previous studies have highlighted that many group VIII metals exhibit high catalytic activity in CO 2 methanation. While precious metal catalysts like Rh, Ru, and Pd have been extensively investigated, [6][7][8][9][10][11] Ni-based catalysts have attracted attention due to their lower preparation cost and higher availability. 12,13 However, Ni-based catalysts typically exhibit lower activity at low temperatures compared to their precious metal counterparts.…”