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Structured adsorbents with High CO2 over N2 selectivity and CO2 uptake capacity
Department of Materials and Environmental Chemistry, Stockholm University.ORCID iD: 0000-0003-4888-6237
2012 (English)In: 2012 AIChE annual meeting: David L. Lawrence Convention Center, Pittsburgh, PA, October 28-November 2, 2012 : conference proceedings., New York: American Institute of Chemical Engineers, 2012Conference paper, Published paper (Refereed)
Abstract [en]

Structured adsorbents with high CO2 adsorption capacity, CO2 over N2 selectivity and rapid adsorption and desorption kinetics are ideal for CO2 capture from power-plant flue gas at a low cost. We report here binder-free zeolite monoliths with high CO2 over N2 selectivity (> 500) and uptake capacity (4mmolg-1) at 298 K and 101 kPa. Binder-free zeolite monoliths were consolidated by a rapid and facile processing approach called pulse current processing (PCP) from partially K exchanged NaA powders. The pore widow size of NaA was optimized by partially exchanging Na with K cations to achieve a high CO2 over N2 selectivity while maintaining a high CO2 uptake capacity. The CO2 uptake from binary mixtures of 0.10CO2-0.90N2 was obtained from the single component CO2 and N2 adsorption isotherms by applying Ideal adsorption solution (IAS) and Fast IAS theories. The binder-free adsorbents with an optimum degree of ion exchange display extraordinarily high CO2 over N2 selectivity and high CO2 uptake, together with a rapid CO2 adsorption and desorption kinetics and high mechanical stability. The performance of the new adsorbent has been compared with other potential candidates for efficient swing adsorption processes by a figure of merit. Key words: CO2 Capture; Zeolite monoliths; Pulse current processing; Selectivity; Adsorption; Ideal adsorbed solution (IAS) theory

Place, publisher, year, edition, pages
New York: American Institute of Chemical Engineers, 2012.
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-32788Local ID: 76425da7-6239-461b-ba61-9ead6226f226ISBN: 9780816910731 (print)OAI: oai:DiVA.org:ltu-32788DiVA, id: diva2:1006022
Conference
AIChE Annual Meeting : 28/10/2013 - 02/11/2013
Note
Upprättat; 2012; 20150513 (andbra)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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Akhtar, Farid

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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More styles
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