Steam reforming of clean biogas over Rh and Ru open-cell metallic foam structured catalysts
Journal article, 2022
The valorisation of clean biogas (CH4/CO2 = 60/40 v/v) by steam reforming over metal open-cell foam-based structured catalysts was investigated. NiCrAl foams were coated by RuMgAl or RhMgAl hydrotalcite-type compounds through electrodeposition to obtain, after calcination, a thin and stable catalytic film of oxides. The active sites for the reforming reactions are highly dispersed Rh or Ru nanoparticles stabilized by a strong metal support interaction, large Ni particles segregated from the support during reduction and reaction, and Rh/Ni bimetallic particles formed by the interaction of the two formers. Rh-based catalysts show superior activity and stability with the time on stream than Ru catalysts, and a low carbon deposition, which is mainly ascribable to the presence of large Ni particles. In comparison to a pelletized catalyst, the structured catalysts are allowed to operate at high space velocities and low Steam to CH4 ratio, increasing the biogas valorisation and thus the productivity.
Rh
Ni
Open-cell foam
Reforming
Clean biogas
Author
Pilar Tarifa
University of Zaragoza
University of Bologna
Nicola Schiaroli
University of Bologna
Hoang Phuoc Ho
Chalmers, Chemistry and Chemical Engineering, Chemical Technology
University of Bologna
Fernando Canaza
University of Zaragoza
Francesca Ospitali
University of Bologna
Giancosimo Sanghez de Luna
University of Bologna
Carlo Lucarelli
University of Insubria
Giuseppe Fornasari
University of Bologna
Angelo Vaccari
University of Bologna
Antonio Monzon
University of Zaragoza
Patricia Benito
University of Bologna
Catalysis Today
0920-5861 (ISSN)
Vol. 383 74-83Subject Categories
Inorganic Chemistry
Other Chemical Engineering
Other Chemistry Topics
DOI
10.1016/j.cattod.2021.03.024