Significance of methanation reactor dynamics on the annual efficiency of power-to-gas -system

Power-to-gas (PtG) is one option to integrate more renewable electricity production the energy system, by offering flexible load, seasonal storage and low-GWP (Global Warming Potential) methane. The first step of PtG process, hydrogen water electrolysis, requires with low specific CO2 emissions. Therefore, operation electrolyser most likely variating according intermittency production. downstream processes should be capable follow dynamics utilize produced hydrogen, avoiding curtailment. This could done a very dynamic reactor or aid buffer storages for feed gases. paper studies effect properties methanation reactor, full load hours on system efficiency. following intermittent markets, leading varying (FLH) different characteristics. Enhancement single parameters related thermal improve efficiency than loading reactor. Coupled threshold were found FLH H2 size, after which average efficiencies became nearly similar as in steady-state operation.