Air Liquide and carbon capture
Industrial gases company, Air Liquide, and cement producer, Holcim, co-applied for the European Innovation Fund in hopes of deploying Air Liquide’s Cryocap carbon capture technology at Holcim’s site in Belgium.
A little CO2 capture context. When it comes to point-source CO2 capture, there is really only one proven method of getting it done: the selective absorption of CO2 into aqueous amine-based solution and subsequent desorption. Air Liquide’s cryogenic process works a bit differently — at a high level, they’re basically cooling down fluegas and turning CO2 into dry ice, and then filtering out the solid CO2.
What’s the connection between fluegas and cement? Cement is made by grinding up cement clinker, and cement clinker is made by reacting lime (calcium oxide) with silicon, aluminum, and ferric oxides in a very hot kiln. Firing that kiln burns natural gas, which emits CO2; in addition, lime production emits even more CO2, because CO2 is produced when limestone (calcium carbonate) is converted into lime.
Bigger picture. The decarbonization of material production can be thought of as a race between companies developing CO2 capture technologies, and companies developing ways of making materials without producing CO2. Air Liquide and Holcim are part of the former camp, and Solidia, who just announced plans to expand production of its CO2-free cement alternative in San Antonio, TX, is part of...
Would you like to reuse content from CEP Magazine? It’s easy to request permission to reuse content. Simply click here to connect instantly to licensing services, where you can choose from a list of options regarding how you would like to reuse the desired content and complete the transaction.