Cryocap™ Oxy

Cryogenic technology to capture and process CO₂ emissions from oxycombustion boilers and kilns.

Download our brochure Contact us

Oxycombustion is a low-carbon route for power/manufacturing. Air Liquide's Cryocap™ Oxy uses advanced flue gas treatment and cryogenic distillation to capture up to 98% of CO₂ from oxy-boilers.

Specialized purification for oxycombustion flue gas

In an oxycombustion process, fuel is burned utilizing pure oxygen instead of ambient air, resulting in a flue gas composed primarily of water vapor and highly concentrated carbon dioxide. Cryocap™ Oxy interfaces with this kiln configuration to enrich, clean, and liquefy the gas stream.

The process four distinct, highly reliable technological bricks:

Flue Gas conditioning & filtration: Cools the incoming stream, performs initial SOx removal, and utilizes dust filtration to eliminate particulate matter, protecting downstream operations.
Compression & drying: Compresses the gas and eliminates residual moisture to prepare the stream for sub-zero processing.
Cryogenic separation: Utilizes low-temperature thermodynamic columns to safely isolate impurities (including high NOx levels) and condense the clean product.
Membrane recovery: Advanced polymeric membranes recover any CO₂ lost during the cryogenic section and seamlessly recycle it back into the compression stage.

By closing the process loop with this final membrane stage, the setup effectively enriches the final flue gas stream above 60% CO₂ while achieving an exceptional overall carbon capture rate of up to 99%.

Fully integrated clean manufacturing systems

Cryocap™ Oxy is highly compatible with heavy manufacturing complexes, notably power generation stations and cement manufacturing kilns. Air Liquide provides a complete, circular integration loop by supplying the baseline oxygen required for the initial oxycombustion process while simultaneously deploying the Cryocap™ Oxy block to liquefy the resulting emissions.

Because our cryogenic processing blocks use physical separation instead of chemicals, they require no toxic or volatile fluids. They deliver highly purified gaseous or liquid carbon dioxide matching the exact storage, re-injection, or merchant-market purity grades requested by project operators.

Frequently Asked Questions (FAQ)

What type of industrial plants are best suited for Cryocap™ Oxy?

Cryocap™ Oxy is explicitly tailored for heavy industrial facilities utilizing oxycombustion systems, such as advanced power generation stations and carbon-neutral cement or lime kilns.

What is the carbon capture rate of the Cryocap™ Oxy system?

The process delivers a highly efficient carbon capture rate between 90% and 98%, enabling operators to meet strict environmental regulations.

What specific technological steps are included in the unit?

The system integrates three core engineering bricks: flue gas drying, automated dust filtration, and a low-temperature cryogenic purification unit.

Industrial scale demonstrations: Callide, Ciuden, and Total Lacq

The thermodynamic integration and process stability of Cryocap™ Oxy have been successfully validated across multiple operational pilot initiatives globally, including major installations at Callide, Ciuden, and the Total Lacq project. These sites confirmed the process's rugged impurity management and stable run factors under diverse combustion loads.
Project K6: Delivering Europe’s first carbon-neutral Cement plant

In a strategic collaboration selected for financial support by the European Commission's 2021 Innovation Fund, Air Liquide has partnered with EQIOM on "Project K6". The goal is to transform the existing Lumbres cement facility in France into a pioneering carbon-neutral plant. The plant uses a first-of-a-kind oxyfuel kiln layout where Air Liquide provides bulk oxygen while implementing Cryocap™ Oxy to capture and liquefy 8 million tonnes of CO₂ over the first 10 years of operation.