CO Cold Box – Syngas Separation and Purification

Air Liquide Engineering & Construction has considerable experience in designing Syngas Purification Unit (also known as CO cold boxes) which are used for producing carbon monoxide (CO) from synthesis gas.

Versatility and customization

Air Liquide Engineering & Construction provides a versatile offer composed of three different CO cold box processes: methane wash, partial condensation and CO wash. For each process, the feed gas is pre-treated to remove any impurities that would freeze at cryogenic temperature. The main components of the synthesis gas are then separated using technology that focuses on differences in their boiling points. The economics of the process can vary significantly depending on the type and quality of feedstock and the required CO product specifications.

In all cases, the cryogenic process is fully customized so that it meets the customer's specifications and requirements in terms of co-products.

Advantages

• Offer includes three CO cold box processes: methane wash, partial condensation and CO wash
• The cryogenic process is fully customized to meet clients' specific needs
• Option to implement fast load change
• Option to reach ultra pure CO

Key figures

• Production: CO up to 99.99% purity
• Capacity: up to 2 400 tons per day
• Specific energy: 18 to 600 kilowatt-hour per ton