Abstract
Pressure swing adsorption (PSA) processes are frequently used in the (petro)chemical industry, but they suffer from ineffective use of the sorbent and slow heat transfer. A pressurized multi-stage fluidized bed (MSFB) for continuous PSA is proposed in this work to overcome these drawbacks. A one stage fluidized bed adsorber was used to determine minimum fluidization velocities of the used amine sorbent at various pressures up to 10 bara. The design of a pilot scale experimental setup is described, together with supporting experiments to show the proof of concept. Removal from 37,000 mol ppm CO2 to <10 mol ppm CO2 in a few seconds was demonstrated in the pressurized MSFB adsorber. The tray efficiencies were high: often larger than 0.85. Using a numerical particle model, it was concluded that the CO2 adsorption rate is controlled via intraparticle mass transfer.
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