Life cycle assessment of power-to-methane systems with CO2 supplied by the chemical looping combustion of biomass

Power-to-methane (PtM) systems may allow fluctuations in the renewable energy supply to be smoothed out by storing surplus form of methane. These work combining hydrogen produced electrolysis with carbon dioxide from different sources produce methane via Sabatier reaction. The present studies PtM based on CO2 supplied chemical looping combustion (CLC) biomass (PtM-bioCLC). Life- cycle- assessment (LCA) was performed PtM-bioCLC evaluate their environmental impact respect a specific reference case. proposed configurations have potential reduce value global warming (GWP) climate change indicator lowest values reported literature date. Moreover, possibility effectively removing atmosphere through concept negative emissions also assessed. In addition GWP, as many 16 LCA indicators were evaluated and for studied found similar those case considered or even significantly lower such categories resource use-depletion, ozone depletion, human health, acidification eutrophication. results obtained highlight these newly schemes.