System for generating an inert gas for an aircraft using liquid hydrogen

A method for generating an inert fluid in an aircraft having a tank of liquid hydrogen, from a primary fluid initially collected from compressed hot air, the primary fluid comprising, as components, water, carbon dioxide, dioxygen, and nitrogen, the method comprising:

• a first step of separating components of said primary fluid by cooling said primary fluid to extract water from said primary fluid in liquid form,
• a second step of separating components of said primary fluid by cooling said primary fluid to extract carbon dioxide from said primary fluid in liquid form,
• a third step of separating components of the primary fluid, by cooling said primary fluid after said second step to extract dioxygen from said primary fluid in liquid form,
• a step of liquefying said primary fluid after said third step of separating components to form liquid nitrogen by cooling the primary fluid with the liquid hydrogen, and followed by a step of pumping said liquid nitrogen towards a tank,
• wherein the first step of separating components of said primary fluid comprises cooling of the primary fluid in a first heat exchanger using ambient air;
• wherein the second step of the separating components of the primary fluid comprises cooling of the primary fluid in a second heat exchanger with said dioxygen extracted during the third step;
• wherein the third step of separating components of the primary fluid comprises a cooling of the primary fluid using said liquid nitrogen;
• wherein the first step of separating components, the second step of separating components, and the third step of separating components of said primary fluid occur by a change of a phase of a component of the primary fluid.