(45d) CO2 Capture Modeling with Intrastage Cooling

A new structured packing device has been designed recently at Oak Ridge National Laboratory that utilizes additive manufacturing. This device combines external gas-liquid contacting for mass transfer with internal coolant channels for heat transfer that results in process intensification for CO₂ capture with amine-based solvents. A process model has been developed to describe the intrastage cooling that takes place within this device. Experimental results with aqueous monoethanolamine (MEA) and with a low-aqueous solvent (LAS) are compared with this process model to demonstrate how CO₂ capture may be described within this novel structured packing device. The device achieves comparative separation efficiency as commercial structured packing while removing heat generated from reaction of CO₂ with amines. Further simulation work will be used to study process trade-offs between amine-based solvents to reach high CO₂ capture rates with intrastage cooling.