Carbon dioxide recovery and removalAs a global leader in gas processing, Linde Engineering can deliver the right CO₂ recovery technology for individual customer and process requirements.

Our pressure swing adsorption (PSA) system is an innovative and highly efficient technology. It is the perfect solution for the recovery and removal of carbon dioxide from process gases such as synthesis gas streams and steel-work gases.

In the case of synthesis gases, PSA technology is used to recover CO₂ from upstream, high-pressure raw syngas streams or low-pressure off-gas streams generated by steam methane reforming or gasification processes. In many cases, PSA technology is a more cost-effective alternative to conventional washing systems due to its lower investment and operating costs.

In the steel industry, PSA technology can be used to efficiently remove CO₂ in direct reduction or blast furnace off-gases. The process removes maximum amounts of CO₂ yet leaves valuable gas components such as H₂, CO, CH₄ in the gas stream for further processing.

PSA systems for the recovery or removal of CO₂ can operate with feed gas pressure levels ranging from approximately 7 to 35 bar(g) and with a minimum CO₂ feed gas content of around 10 vol.-%.

A CO₂ PSA unit can achieve a product purity of up to 95 vol.-%, with unit capacities ranging from a few thousand Nm³/h to around 300,000 Nm³/h.