(383f) Study of the Effect of the Polyamine Absorbents for CO2 Capture Using Rotating Packed Bed (RPB)

Amine-based chemical absorption process is one of the promising CO₂ capture technologies for a large amount of CO₂ emission facilities such as fossil fuel power plants, cement, steel, and petrochemicals. In particular, the conventional packed bed process has been incorporated to remove acid gas (CO₂ and H₂S). However, this process has the disadvantages of such a large footprint and pressure drop. In addition, there is a demand for a compact CO₂ capture process due to that the lack of footprint near the real industrial complex. Rotating Packed Bed (RPB) has an alternative CO₂ capture system as a solution to the footprint issue. However, there are few studies on the in-depth CO₂ capture solvent for the customized RPB equipment.

Therefore, it was explored that the CO₂ capture solvent screening is carried out with various polyamine-based solvents under the RPB prototype experimental equipment. The feed gas composition is based on the Fluid Catalytic Cracking (FCC) flue gas. In the experiment, a variety of solvent concentrations and L/G ratios are investigated to verify the CO₂ capture rate with consideration of polyamine solvents. In addition, the physical properties of each solvent like absorption, heat of reaction, cyclic capacity, viscosity, etc. are estimated by KIER analysis equipment.

In the future, it can be investigated that the blended amine solvents are incorporated to reduce the CO₂ regeneration energy against the single polyamine cases. Various amine solvents and promotors are candidate for the blending amine solvent. Also, this study can be carried out with the full-scale CO₂ capture system, which provides enough estimated information related to the CO₂ regeneration energy.

This work was supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (No. 20224C10300050).