It's their name for combining oxyfuel combustion with amine capture. Oxyfuel is where you feed the combustion process using pure oxygen mixed with exhaust gas,

It's their name for combining oxyfuel combustion with amine capture. Oxyfuel is where you feed the combustion process using pure oxygen mixed with exhaust gas, instead of air. Since you're not pulling in all that nitrogen gas from the air, the exhaust is much richer in CO2, which is then easier to catch. Amine capture is where you use an amine solvent liquid that is sprayed as droplets into a large column, where the droplets fall down and absorb CO2 into the liquid, while the exhaust gas flows up and leaves the column free from CO2. Then the liquid that collects at the bottom is moved to a stripper cylinder, where the liquid is heated up and the CO2 is released as pure gas. Specifically for the cement process, using both of these technologies together, it turns out you can do some cool process integration where the byproduct of one is the requirement of the other, and vice versa, so you can make the whole setup a lot cheaper in both CAPEX and OPEX.