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Silicoaluminophosph...
Silicoaluminophosphates as CO2 sorbents
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- Cheung, Ocean (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Liu, Qingling (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Bacsik, Zoltan (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Hedin, Niklas (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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(creator_code:org_t)
- Elsevier BV, 2012
- 2012
- Engelska.
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Ingår i: Microporous and Mesoporous Materials. - : Elsevier BV. - 1387-1811 .- 1873-3093. ; 156, s. 90-96
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Silicoaluminophosphates (SAPO-17, SAPO-35, SAPO-56 and SAPO-RHO) synthesised via hydrothermal means are tested for their abilities to adsorb carbon dioxide. These 8-ring microporous phosphates show high capacities to adsorb CO2. SAPO-RHO has a high uptake of CO2 and a very low uptake of N-2 due to its narrow pore window aperture at 273 K. Its significant uptake of N-2 at 77 K is rationalised by a temperature induced shrinkage effect. SAPO-56 has a slightly higher CO2 capacity (5.42 mmol/g, 273 K, 101 kPa) and is less water sensitive than zeolite 13X. Cyclic adsorption and in situ infrared spectroscopy (IR) reveal that SAPOs retain 95% of their original CO2 capacity after six cycles and that adsorption occurs via physisorption. The calculated heat of adsorption for CO2 (at 0.2-0.7 mmol/g loading) on SAPO-56 and SAPO-RHO lies in the physisorption range (similar to 35 kJ/mol). SAPOs, in particular SAPO-56 and SAPO-RHO, possess many desirable properties and are potentially good adsorbents for CO2 capture in swing adsorption processes.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- Carbon capture
- Silicoaluminophosphates
- Adsorption
- Carbon dioxide
- SAPO-56
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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