CO₂ Capture

DMX™

The DMX™ process, a patented process stemming from IFPEN’s Research and marketed by Axens, is a second-generation process using a solvent that reduces the energy intensity for carbon capture by nearly 30% as compared to the MEA (Mono ethanol amine) reference process.

The DMX™ process is a CO₂ post-combustion capture process based on absorption by a demixing solvent, the DMX™ solvent.

The DMX™ process has been developed for CO₂ capture on coal power stations flue gases and steel gas. It can also be used for capturing CO₂ from other type of emitters such as waste incinerator, cement plant, district heating as well as production of electricity from biomass. This process is well adapted for CO₂ capture on industrial smoke or industrial gas when the CO₂ partial pressures are low to medium.

The DMX™ solvent is a specifically designed solvent that is demixing under specific temperature and CO₂ partial pressure’s conditions. When in contact with CO2, the formation of two phases can be observed, which effectively capture the CO₂.

The demixing principle

Currently, one of the main challenge of the industry is to significantly increase the energy performances of CO₂ capture solutions. They represent the costliest part of the CCS process. The DMX™ solvent tackles this issue. It has a high cyclic capacity (4 times higher as compared with the MEA reference) and only the CO₂ rich phase needs to be regenerated. As it is very stable, it may be regenerated at higher temperature than amine solvents such as MEA, which allows producing the CO₂ in pressure.

DMX™ solvent is also less corrosive and carbon steel may be used as principal material thus reducing also the CAPEX compared to other first-generation solvents.

AdvAmine™

CO₂ capture on syngas can be achieved using mature technology such as EnergizedMDEA which is part of the AdvAmine portfolio. CO₂ absorption on syngas is easily achieved as it is typically at high pressure and there is a large driving force to absorb the CO₂ and the syngas is quite pure and does not contain any oxygen. Alternate regeneration schemes and energy integration can reduce the energy requirement.