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Aluminophosphates f...
Aluminophosphates for CO2 Separation
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- Liu, Qingling (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK),Department of Matrials and Environmental Chemistry, Berzelii Center Exselent on Porous Materials, Arrhenius Laboratory, Stockholm University, Stockholm
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- Cheung, Ngo Chuen Ocean (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK),Department of Matrials and Environmental Chemistry, Berzelii Center Exselent on Porous Materials, Arrhenius Laboratory, Stockholm University, Stockholm
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- Garcia-Bennett, Alfonso E. (författare)
- Uppsala universitet,Nanoteknologi och funktionella material
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- Hedin, Niklas (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK),Department of Matrials and Environmental Chemistry, Berzelii Center Exselent on Porous Materials, Arrhenius Laboratory, Stockholm University, Stockholm
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(creator_code:org_t)
- 2010-11-29
- 2011
- Engelska.
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Ingår i: ChemSusChem. - : Wiley. - 1864-5631. ; 4:1, s. 91-97
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The pressure-swing adsorption method for carbon dioxide capture would ideally be facilitated by adsorbents with a high capacity and a high selectivity for CO2. Several aluminophosphates with 8-ring window apertures (AlPO4-17, AlPO4-18, AlPO4-53, and AlPO4-25) were synthesized by hydrothermal crystallization, calcined, and their CO2 uptake and CO2/N-2 selectivity were studied. CO2 and N-2 uptake was determined for pressures up to 101 kPa at 273 and 293 K. Langmuir and Toth adsorption models were used to describe the adsorption isotherms. The CO2 and N-2 uptakes strongly indicated that the squeezed 8-ring windows of certain aluminophosphates can sieve CO2 from a CO2 and N-2 gas mixture. Both AlPO4-53 and AlPO4-25 exhibited a remarkably higher uptake of CO2 compared to N-2. The hydrophilicity of the AlPO4 materials was investigated by means of water adsorption, and the results showed that all of the tested aluminophosphates were less water sensitive than a benchmark zeolite (13X). In particular, AlPO4-53 and AlPO4-25 showed a very low degree of water uptake with up to 20-30% relative humidity. Determination of cyclic adsorption and desorption confirmed the relatively hydrophobic nature of the aluminophosphates, which render them less energy costly for the regeneration of adsorbents.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- adsorption
- aluminophosphates
- carbon dioxide fixation
- hydrophilicity
- sustainable chemistry
- TECHNOLOGY
- TEKNIKVETENSKAP
- Teknisk fysik med inriktning mot nanoteknologi och funktionella material
- Engineering Science with specialization in Nanotechnology and Functional Materials
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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