Dynamic Methanation of CO₂ – Effect of Concentration Forcing

Abstract

Abstract Investigating the effect of concentration forcing of the CO 2 methanation is not only relevant for power‐to‐gas plants but also for the study of dynamic phenomena of this reaction. In this study a Ni/Al 2 O 3 catalyst is investigated under concentration forcing at industrially relevant conditions. The dynamic experiments allow an evaluation in terms of the reaction rate and enable the study of the reaction mechanism. The experiments show that no methane is formed in the CO 2 ‐rich part of the cycle, whereas a fast hydrogenation of carbonaceous species to methane takes place upon switching to H 2 .