关键词: CO₂ capture, Catalyst fluidization, Mass transfer, DFT, Energy consumption, Field synergy

Abstract: There are great interests to capture the CO₂ to control the greenhouse gas emission. Amine absorption of CO₂ is being taken as an effective way to capture CO₂ in industry. However, the amine absorption of CO₂ is cost-ineffective due to great energy consumption and solution consumption. In order to reduce the capture cost, catalyst fluidization is proposed here to intensify the mass transfer and heat transfer. Catalyst fluidization with field synergy and DFT model is developed by incorporating the effects of catalyst reaction kinetics, drag force and multi-field into the mass transfer, heat transfer, fluid flow and catalyst collision. Experiments with an improved distributor are performed well to validate the model. The reaction kinetics is determined by the DFT simulation and experiment. The mass transfer coefficient in the fluidized reactor is identified as 17% higher than the conventional packed reactor. With the field synergy of catalyst fluidization, the energy consumption for CO₂ desorption is reduced by 9%. Stepwise operation and inclination reactor are used to improve catalyst fluidization process.

Key words: CO₂ capture, Catalyst fluidization, Mass transfer, DFT, Energy consumption, Field synergy