Simulation-based optimization of cycle timing for CO2 capture and hydrogenation with dual function catalyst

CO2 methanation could play a significant role in the future energy system. The excess of renewable electric can be transformed into storable methane to balance demand when required. Moreover, performed alternating steps storage and reduction, avoiding expensive purification steps. In this work, we will use previously developed validated model optimize by simulation adsorption hydrogenation cycles timing (tCO2/tH2). performance catalyst is quantified conversion (XCO2, %), H2 (XH2, %) CH4 production (YCH4, mmol g?1 cycle?1). Long times result high productions per cycle, however, low conversion. Therefore, close saturation (tCO2=60 s) moderate are preferable. To better select optimal time, new catalytic parameter set, average formation rate (r¯CH4, ?mol s?1). time set at 120 s. addition having CH4, tCO2/tH2= 60/120 cycle would allow work with three identical beds parallel, one mode two regenerating mode. With optimum results 148 cycle?1 (1.2 s?1) 25% 43%, respectively