K‐Promoted Hydrotalcites for CO2 Capture in Sorption Enhanced Reactions. Issue 4 (7th March 2013)

• Record Type: Journal Article
• Authors: Wu, Y.‐J.; Li, P.; Yu, J.‐G.; Cunha, A. F.; Rodrigues, A. E.
• Is Part Of: Chemical engineering & technology. Volume 36:Issue 4(2013:Apr.)
• Page Start: 567
• Page End: 574
• Publication Date: 2013-03-07
• Subjects: Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.201200694
• Languages: English
• ISSNs: 0930-7516

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Potassium‐promoted hydrotalcite‐like material was prepared with potassium nitrate as the K precursor. The highest ever reported CO₂ adsorption capacity (1.13 mol kg^–1) was obtained at 656 K with <italic>p</italic><mml:math overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mtext> </mml:mtext><mml:mrow><mml:mtext>CO</mml:mtext><mml:msub><mml:mtext> </mml:mtext><mml:mrow><mml:mtext>2</mml:mtext></mml:mrow></mml:msub></mml:mrow></mml:msub></mml:math><inline-graphic xlink:href="ark:/27927/pgg1v7jk1q6" mimetype="image" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /> = 0.5 bar 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 656 K to 708 K), where a complete regeneration was achieved within 60 min, which reduced to half the time required for regeneration under isothermal conditions.</p> </abstract>