Power-to-Gas: Synthetic Natural Gas (SNG) from Renewable Energies

Abstract

The Power-to-gas (PtG) is an auxiliary solution for long-term and large-scale storing renewable electrical energy in a chemical energy carrier. PtG concept not a solution for storage but it also reduces the CO₂ emission by using it in process and produce CO₂ neutral gas as synthetic natural gas (SNG) for transportation, industry, and households. PtG involves electrolysis as the production of H₂ and CO₂ methanation as the main process for the production of SNG from renewable sources. The interconnected multi-energy system is considered the solution for an efficient and environment-friendly energy system in the future. However, before the implementation of this technology, some key aspects need in-depth analysis. This paper discusses a technical overview as well as an economic overview of the interconnected multi-energy system.