Steam reforming of clean biogas over Rh and Ru open-cell metallic foam structured catalysts
Artikel i vetenskaplig tidskrift, 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
Författare
Pilar Tarifa
Universidad de Zaragoza
Universita di Bologna
Nicola Schiaroli
Universita di Bologna
Hoang Phuoc Ho
Chalmers, Kemi och kemiteknik, Kemiteknik
Universita di Bologna
Fernando Canaza
Universidad de Zaragoza
Francesca Ospitali
Universita di Bologna
Giancosimo Sanghez de Luna
Universita di Bologna
Carlo Lucarelli
Universita degli Studi dell'Insubria
Giuseppe Fornasari
Universita di Bologna
Angelo Vaccari
Universita di Bologna
Antonio Monzon
Universidad de Zaragoza
Patricia Benito
Universita di Bologna
Catalysis Today
0920-5861 (ISSN)
Vol. 383 74-83Ämneskategorier (SSIF 2011)
Oorganisk kemi
Annan kemiteknik
Annan kemi
DOI
10.1016/j.cattod.2021.03.024