Prof. Pen-Chi Chiang
Graduate Institute of Environmental Engineering, Taiwan University
Abstract: The application of a high-gravity rotating packed bed (HiGee RPB) for multiple air pollutants (i.e., SO2, NOx, VOCs and particle matters (PM)) abatement 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 thereby creating the synergetic removal of NOx-SOx-CO2 and PM process was developed 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 reduction. The combination of oxidation and absorption by introducting ClO2 in the HiGee RPB can reduce both the NOx and VOCs emissions. The design criterial of HiGee RPB for acid gas pollutant including liquid-to-gas-ratio and rotating speed provide a theoretical approach to investigate the mass transfer rate and enhancement factor caused by high-gravity field and chemical reaction. In addition, the PM collection performance using a HiGee RPB is superior to the conventional wet scrubber. The process exhibits a relatively higher removal efficiency with a short residence time under ambient temperature and pressure which indicates the HiGee technology can be considered as a promising technology for multiple air pollutants abatement and CO2 mineralization.
In addition, a systematic approach to evaluating the environmental-economic benefits of multiple air pollutants abatement and CO2 mineralization exemplified by municipal solid waste incineration (MSWI) fly ash using the HiGee technology was also investigated. Technical-economic analysis (TEA) and life cycle analysis (LCA) were integrated for comprehensively evaluating the prioritized alternatives. In terms of environmental benefits, the installed HiGee system not only can reduce multiple air pollutants but also can reduce water and energy consumption towards carbon neutrality in the course of carbon mineralization.
Host：Prof. Wenchao Zhang
Central South University
EEH Early Career Board Member
Time：08:00pm Dec 27, 2022 (Beijing time)
Zoom ID: 816 9975 7155
Bilibili: 25002335
