The present invention concerns a plant (100) for the generation of methanol (116) and for providing output power, preferably in the form of heat and/or electric energy. The plant (100) comprises - a water electrolysis facility (210) which can be supplied by electric energy (E4) and water (105) and which is designed in order to produce hydrogen gas (107) and oxygen gas. The water electrolysis facility (210) comprises a hydrogen gas outlet (211) and an oxygen gas outlet (212)； - a thermal engine with at least one combustion chamber (200) designed for maintaining an oxygen-based combustion process in order to provide output power (E8). The combustion chamber (200) comprises an input side (201), and a flue gas outlet (204) for releasing a flue gas (104) which contains more than 65 vol.-% carbon dioxide. - The plant (100) further comprises a gas connection (250) for feeding the oxygen gas from the oxygen gas outlet (212) to the input side (201) of the combustion chamber (200)； and - a gas connection (202) for feeding a combustion gas composition (CGC) comprising a hydrocarbon gas and carbon dioxide to the input side (201) of the combustion chamber (200)； and - a gas mixer (53) for providing a gas mixture, said gas mixer (53) being connectable to said hydrogen gas outlet (211) and being directly or indirectly connectable to said flue gas outlet (204)； and - a catalytic reactor (220) for carrying out a catalytic process which processes said gas mixture in order to provide said methanol (116).Cette invention concerne une installation (100) qui produit du méthanol (116) et génère une énergie de sortie, de préférence, sous la forme d'énergie thermique et/ou électrique. L'installation (100) comprend - une unité d'électrolyse de l'eau (210) qui peut être alimentée en énergie électrique (E4) et en eau (105) et qui est conçue pour produire du gaz hydrogène (107) et du gaz oxygène. L'unité d'électrolyse d'eau (210) comprend une sortie de gaz hydrogène (211) et une sortie de gaz ox
