PROCESS FOR CO-PRODUCING AMMONIA AND METHANOL WITH REDUCED CARBON

Process for the co-production of ammonia and methanol with reduced carbon dioxide emission comprising the steps of (a) providing a hydrocarbon feed stock; (b) preheating the hydrocarbon feed stock in a fired heater and/or a reformer waste heat section; (c) steam reforming the preheated hydrocarbon feed stock in at least one steam re- former to a raw synthesis gas comprising hydrogen and carbon oxides where the module M is < 2.05; (d) splitting the raw synthesis gas into a first and second stream; (e) passing the first stream of the raw synthesis gas to water gas shift section comprising one or more shift reactors for generating a shifted synthesis gas; (f) passing the shifted synthesis gas to a carbon dioxide removal section for generating a carbon dioxide depleted synthesis gas; (g) cleaning the carbon depleted synthesis gas in a cleaning unit to a cleaned synthesis gas comprising hydrogen or hydrogen and nitrogen, optionally adding nitrogen to the cleaned synthesis gas to generate an ammonia synthesis gas with a molar ratio of hydrogen to nitrogen of between 2.9 - 3.1; (h) converting the ammonia synthesis gas to ammonia; and (i) passing the second stream of the raw synthesis gas to a cooling and water separation section to generate a water depleted synthesis gas; (j) adding a part of the of the carbon depleted synthesis gas from step (f) to the water depleted synthesis gas to generate a methanol synthesis gas with a module M >1.95; (k) converting the methanol synthesis gas in at least one methanol reactor to methanol and withdrawing a raw methanol product and a purge gas stream containing unconverted methanol synthesis gas; wherein the purge gas stream from step (k) is added to the first stream of the raw synthesis gas upstream to step (e) and/or to the steam reforming in step (c). L'invention concerne un procédé de co-production d'ammoniac et de méthanol à émission de dioxyde de carbone réduite comprenant les étapes consistant à (a) fournir une charge d'alimentation d'hydrocarbures ; (b) préchauffer la charge d'alimentation d'hydrocarbures dans un dispositif de chauffage à combustible et/ou une section de chaleur perdue de reformeur ; (c) reformer à la vapeur la charge d'alimentation d'hydrocarbures préchauffée dans au moins un reformeur à vapeur en un gaz de synthèse brut comprenant de l'hydrogène et des oxydes de carbone où le module M est < 2,05 ; (d) diviser le gaz de synthèse brut en un premier et un second flux ; (e) faire passer le premier flux d