Cryocap™FG and Cryocap™ Steel

Smart combination of proprietary Advanced cryogenic and Adsorption carbon capture solutions tailored to decarbonize any flue gas above 12% CO₂ (cement, lime, Steam methane reformers, biomass boilers, FCC…) and blast furnaces.

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Cryocap™ FG and Steel offer robust, scalable, non-chemical cryogenic separation to decarbonize heavy industry and biomass power, capturing up to 98% of CO₂ emissions from complex gas streams.

Low-carbon solutions for heavy industry

Our cryogenic carbon capture portfolio applies optimized thermodynamic technology blocks to cleanly separate CO₂ without the consumption of chemical solvents. Depending on your primary facility operations, the system is deployed in two targeted configurations:

Cryocap™ FG (Flue Gas): Engineered explicitly for combustion gases from Steam Methane Reformers (SMR), Fluid Catalytic Crackers (FCC), waste incineration, and cement or lime production. It efficiently processes off-gases with a CO₂ content equal to or greater than 12% (dry basis) using pressure swing adsorption (PSA)-assisted CO₂ condensation. This process provides smart impurities management to handle demanding feed gases with high NOx levels.
Cryocap™ Steel: Purpose-built for integrated ironmaking and steel production facilities, seamlessly retrofitting into both existing and greenfield blast furnaces or direct reduction gas networks. It handles feedstock streams containing 12% to 50% CO₂. By extracting carbon molecules from the system, it enables a 80% to 90% CO recovery rate to reuse valuable fuel loops. This optimization yields a significant performance boost, cutting plant coke consumption by up to 20% while increasing overall hot metal production by up to 5%.

A solvent-free, electrified approach

Unlike traditional chemical absorption methods, the entire Cryocap™ suite relies on a physical, solvent-free cryogenic separation process.

Zero chemicals: Eliminates the environmental and operational complexities of managing, handling, or disposing of chemical amines.
Powered by electricity: The process is driven by electrical compressors and refrigeration units rather than thermal energy.
Renewable integration: By running on renewable electricity, facilities can push their environmental footprint even closer to true net-zero.

How Cryocap™ FG works?

The Cryocap™ FG process breaks down into seven key steps, enabling CO₂ emissions to be transformed from a gas into a liquid that is easy to transport and store:

Cleaning and filtration: industrial fumes are first cleaned to remove impurities that could disrupt the process.
Compression: the gas is then compressed, the first essential condition for CO₂ to become liquid.
Drying: residual moisture is removed from the gas.
Concentration of CO₂: the process separates CO₂ from other gaseous components (mainly oxygen and nitrogen). The decarbonized and cleaned flue gas is evacuated.
Further compression: the isolated CO₂ is further compressed.
Cooling: the gas is cooled to very low temperatures, the second condition to obtain CO₂ in liquid form.
Transport: once liquefied, CO₂ can be easily transported to geological storage sites, such as depleted natural gas fields.

Frequently Asked Questions (FAQ)

What is the minimum CO₂ concentration required for Cryocap™ FG?

Cryocap™ FG is optimized for flue gas streams containing a CO₂ concentration of 12% or higher on a dry basis, making it ideal for SMR flue gases, cement plants, and refineries. When integrated with a local heat district network, CryocapTM becomes a almost zero energy loss technology since heat generated by its compressors is then recovered.

How does Cryocap™ Steel improve the productivity of a blast furnace?

By separating and recovering 80% to 90% of valuable carbon monoxide (CO) from the process loops, the system reduces a steel plant's coke consumption by up to 20% while boosting hot metal yield by up to 5%.

Do Cryocap™ systems use chemical solvents or hazardous materials?

No. Cryocap™ technology relies entirely on physical and cryogenic separation techniques. It uses no volatile chemical solvents, meaning zero toxic or flammable gases are introduced into your plant's environment.

Decarbonizing lime production: The Réty project

Air Liquide has partnered with Lhoist to deploy our innovative carbon capture technology to decarbonize a world-scale lime plant in Réty, France. As an industry inherently prone to high process emissions from limestone decomposition, this project represents a massive structural step forward for hard-to-abate sectors.

Air Liquide will construct and operate a dedicated unit utilizing our proprietary Cryocap™ FG process. The facility is engineered to reliably capture and purify 95% of the CO₂ arising from the existing lime production units, avoiding more than 600,000 tonnes of CO₂ emissions per year starting in 2028.