“…Different types of reactors have been proposed for the methanation reaction, including packed-bed, monolith, [39][40][41] fluidized bed [42,43] and heat-exchanger reactors [44][45][46] carrying microchannels. [44,[47][48][49] The aim of current studies is the determination of the effect of the presence of methane and hydrogen sulfide in the feed stream on activity, selectivity and durability of ceria and alumina supported nickel catalysts in CO 2 methanation reaction for biogas valorization. Studies were carried out by the application of packed-bed and microchannel microreactors, operated under 2 and 12.5 bar pressure, respectively.…”