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Comment Separation Processes

Low-cost separation of CO2 from fluegas

By Chemical Engineering |

A novel solvent can reduce the costs of capturing and recovering carbon dioxide from gas mixtures compared to the use of amine-based solvents, such as monoethanolamine (MEA). The solvent, along with an associated cyclic absorption-desorption process, was developed by Carbon Clean Solutions Pvt. Ltd. (CCS; Mumbai, India; www.carboncleansolutions.com) to replace MEA for separating CO2 from fluegas, synthesis gas and other gas mixtures in industrial applications. By combining amine-based compounds with salts, CCS CDRMax solvent can react quickly to absorb CO2, similarly to MEA, but can also reduce the energy requirements for desorption and reduce corrosion, says Aniruddha Sharma, CEO of CCS. The system works by bubbling fluegas (with ash removed) through large cylinders containing the CDRMax to absorb the CO2. In a second vessel, the CO2 is released from the solvent at 100°C. “If you can capture CO2 cheaply, the CO2 can be converted into more valuable products,” says Sharma. CCS says that capital costs for the CO2-removal process can be reduced by 50% because the CDRMax solvent reduces corrosion significantly compared to MEA, and the process loss of solvent can be lowered from 40–95% to around 5–10%. The CDRMax solvent has been…
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