(335a) Enhanced Multiple Air Pollutant Abatement in the High-Gravity Rotating Packed Bed: Theoretical Approach Towards Practical Application

The application of a high-gravity rotating packed bed (HiGee RPB) for multiple air pollutants (i.e., SO₂, NO_x and particle matters (PM) ) reduction from industrial flue gas emissions was developed and deployed. In this research work, a green process intensification by using the industrial alkaline wastes such as slags or fly ash leachate as the absorbent was developed, creating the synergetic removal of NO_x-SO_x-CO₂ and PM process to save the chemicals and energy consumption. High alkalinity solution and calcium ions contents in the solid leachate facilitate the accelerated carbonation and other acid gas. The combination of oxidation and absorption in the HiGee RPB can reduce the NO_x emission. The design criterial of HiGee RPB for acid gas pollutant including the determination of key operating factors such as liquid-to-gas-ratio and rotating speed as well as the mass transfer characteristics. The theoretical approach goes to investigate the mass transfer rate and enhancement factor caused by high-gravity field and chemical reaction. In addition, the PM collection performance using HiGee RPB is superior to the conventional wet scrubber. The process exhibits a high removal efficiency with a short residence time under ambient temperature and pressure. Several sub-pilot HiGee systems for air pollutants emission reduction were successfully deployed at the industries in Taiwan. The results showed that the application of the HiGee technology was a proven technology.