(35b) Rate-Based 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 rate-based process model has been developed to describe the intrastage cooling that takes place within this device by coupling together heat and mass transfer. Experimental results with different solvents 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.