Journal
CHEMICAL ENGINEERING & TECHNOLOGY
Volume 36, Issue 4, Pages 567-574Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ceat.201200694
Keywords
CO2 sorption; Hydrotalcite-like compound; Sorption-enhanced reaction
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Funding
- China Scholarship Council [2010674011]
- Fundacaopara a Ciencia e Tecnologia (FCT), Portugal [SFRH/BPD/62968/2009]
- [FEDER/POCI/2010]
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Potassium-promoted hydrotalcite-like material was prepared with potassium nitrate as the K precursor. The highest ever reported CO2 adsorption capacity (1.13molkg1) was obtained at 656K with pCO2=0.5bar at humid conditions. A mathematical model was developed and it satisfactorily simulated the adsorption and desorption processes. The stability of the material was tested with repeated adsorption/desorption cycles; the CO2 adsorption capacity decreased around 7% after ten cycles. In addition, regeneration was performed with temperature swing operation (from 656K to 708K), where a complete regeneration was achieved within 60min, which reduced to half the time required for regeneration under isothermal conditions.
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