At the heart of the future
Air Liquide has developed a suite of robust & competitive technologies for carbon capture and liquefaction suitable for various industries to decarbonize, advance the energy transition and accompany customers in meeting their sustainability objectives.
Our customized carbon capture utilization and storage solutions cover the entire value chain for producers of hydrogen, renewable fuels, methanol and more. One of the key technologies helping customers today is Cryocap™, a carbon capture technology that is unique in the world.
CryoCap™ is a technological innovation for carbon capture which uses a cryogenic process involving low temperatures, around -50°C, combined with membrane separation, that is unique in the world. CryoCap™ can be adapted to fit the needs of a variety of industries including refining and hydrogen production plants in particular, steel (blast furnace off gases), and oxy-combustion processes which really includes any fuel burning industry.
Used to capture CO2 in hydrogen production plants, CryoCap™ H2 involves compressing and drying offgas from the production process and sending it to a cryogenic unit. Partial condensation and distillation techniques are then applied to separate the CO2 from other components. As a result, a pure and pressurized CO2 flow is produced by the cold box.
Non-condensed gases are recycled through a membrane system to recover H2 and further CO2, and any residual gas is sent to burners in the reformer furnace. Finally, the resulting CO2 product is compressed to supercritical pressure or liquefied and stored in liquid storage.
Designed to capture CO2 in power plants, Cryocap™ Oxy uses oxy-combustion flue gas as its feedstock. The gas initially enters a pre-treatment unit, where it is cooled down and components such as sulfur oxides, hydrofluoric acid, hydrochloric acid and dust are removed, plus most of the nitrogen oxides. Before entering the cryogenic purification unit, the gas is compressed and dried. Inside the cold box, partial condensation and distillation techniques separate the CO2, removing heavy compounds such as any remaining nitrogen oxides, and light elements such as oxygen, argon, nitrogen, nitrogen oxide and carbon monoxide.The CO2 product is pressurized to supercritical pressure. Further CO2 is then recovered by recycling non-condensed gases through a membrane system. Finally, residual gas is expanded for energy savings and sent to the stack.
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