(NL1010288-C2)   NOVELTY - Methane-rich gas is produced by feeding biomass and/or fossil fuels to a first reactor to form gaseous reaction products, where the first reactor has a hydrogasification reactor which is fed with hydrogen coming from an external source. The product gas has a Wobbe-index of 40-45, preferably 42-45 MJ/m3 (s.t.p.), and a methane molar% of at least 75, preferably 80%.    USE - For producing methane-rich product gas (SNG).    ADVANTAGE - The invention provides a process, in which a hydrogen can be stored efficiently and economically in chemically bound form with relatively little carbon monoxide being present in the synthesis gas formed, and a simple and a relatively small methanation reactor used in the process. The use of the high-temperature plasma process to produce hydrogen from natural gas in combination with the hydrogasification process has the advantage that the Carbon Black and Hydrogen (CBandH) process yields pure carbon. The reduction in calorific value as a result of the conversion of natural gas into hydrogen being compensated for by more than 100%, by back-reaction of the hydrogen to form SNG. This ensures that the fossil carbon disappears from the chain, where sustainable carbon is fed from the biomass with a net gain in energy, owing to the introduction of biomass to an amount roughly 60%.    (EP1127038-A1)   NOVELTY - Methane-rich gas is produced by feeding biomass and/or fossil fuels to a first reactor to form gaseous reaction products, where the first reactor has a hydrogasification reactor which is fed with hydrogen coming from an external source. The product gas has a Wobbe-index of 40-45, preferably 42-45 MJ/m3 (s.t.p.), and a methane molar% of at least 75, preferably 80%.    USE - For producing methane-rich product gas (SNG).    ADVANTAGE - The invention provides a process, in which a hydrogen can be stored efficiently and economically in chemically bound form with relatively little carbon monoxide being present in the synthesis gas formed, and a simple and a relatively small methanation reactor used in the process. The use of the high-temperature plasma process to produce hydrogen from natural gas in combination with the hydrogasification process has the advantage that the Carbon Black and Hydrogen (CBandH) process yields pure carbon. The reduction in calorific value as a result of the conversion of natural gas into hydrogen being compensated for by more than 100%, by back-reaction of the hydrogen to form SNG. This ensures that the fossil carbon disappears from the chain, where sustainable carbon is fed from the biomass with a net gain in energy, owing to the introduction of biomass to an amount roughly 60%.