Abstract: A method comprising the steps of: a) capturing carbon dioxide in a carbon dioxide absorption unit using a carbon dioxide absorption solution; b) feeding the carbon dioxide absorption solution comprising absorbed carbon dioxide and generated in step a) to the high-pressure regenerator of a heat exchange system comprising the high-pressure regenerator and a steam-fired reboiler; and c) supplying low-pressure steam at a pressure ranging from 3.2 to 3.5 kg/cm2 to the steam-fired reboiler for supplying heat to the high-pressure regenerator wherein, the carbon dioxide absorption solution is heated, thereby producing a steam condensate and a regenerated carbon dioxide absorption solution; characterized in that the method further comprises the step of: d) directly supplying the steam condensate produced in step c) to a de-aerator, thereby producing an aqueous solution suitable for producing steam with an oxygen content lower than 20 ppb.

Abstract: A method for heating a feed of natural gas, used as feed for a steam reformer of an ammonia production system, wherein the system comprises a steam reformer, operably connected to a heat recovery unit comprising at least two heating coils maintained at a different temperature, wherein the feed of natural gas passes through the at least two heating coils, the method comprising: a) recovering heat in the heat recovery unit from the ammonia production system and b) exchanging at least part of the heat recovered in step a) with at least a portion of the feed of natural gas, thereby obtaining a heated feed of natural gas, wherein the feed of natural gas does not comprise steam.