The potential of “Power to Gas†technology integrated with biomethane production
conference paper
A feasibility study on integration of “Power to Gas” technology with bio-methane production from bio-syngas produced by biomass gasification shows that a significant amount of excess electricity can be accommodated in bio-SNG production. By adding hydrogen produced from intermittent renewable sources to the methanation section, production capacity of methane can be doubled in a flexible operation scheme, while gas quality and cold gas efficiency are hardly affected. Considering two possible limits for H2 allowed in the natural gas product, it was found that a limit of 10 % v/v can be easily reached. However, a much stricter limit 0.5 % v/v also considered by some pipeline operators cannot be reached with the conventional reactor studied. Simulation and experimental results show however, that with an advanced reactor using sorption enhanced (SE)-methanation the stricter H2 limit can also be reached. The corresponding CO and CO2 conversions where close to 100%. The methanation and SNG upgrade section mode need to deal with a considerable variation in mass flows and variations in the heat balance when switching between hydrogen addition and CO2 removal mode.
TNO Identifier
822019
Publisher
ECN
Collation
13 p.
Place of publication
Petten
Pages
13 p.
Files