Adsorption of CO2 on CoII3[CoIII(CN)6]2 Using DRIFTS
Journal Article
·
· Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, 74(3):629-634
Adsorption of CO2 on dehydrated Prussian blue analogue CoII3[CoIII(CN)6]2 was studied using diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). An infrared peak at 2340 cm-1 assigned to adsorbed CO2 was identified and used semi-quantitatively to construct an isotherm at 298 K that followed the Langmuir-Freundlich equation in the low coverage Henry’s limit with CO2 pressure below about 25 kPa. Temperature-dependence at 6.8 kPa CO2 was used to determine the adsorption enthalpy (-23 +/- 3 kJ mol-1) in this limit as well. Deviation from the Langmuir-Freundlich model was significant at temperatures above 298 K and attributed primarily to a loss of reliability of the DRIFT spectra at higher CO2 pressures, particularly at higher temperatures, and the accompanying uncertainties in the difference spectra when correcting for the presence of gaseous CO2. Based on this work, the application of DRIFTS to study CO2 adsorption on Prussian blue analogues and other adsorbents appears promising, although the range of conditions over which it can be applied appears to be more limited than with other techniques.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 974979
- Report Number(s):
- PNNL-SA-65974; AA3010000
- Journal Information:
- Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, 74(3):629-634, Journal Name: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, 74(3):629-634 Journal Issue: 3 Vol. 74
- Country of Publication:
- United States
- Language:
- English
Similar Records
Competitive Adsorption Study of CO2 and SO2 on CoII3[CoIII(CN)6]2 Using DRIFTS
Adsorption Properties of Hydrogen and Carbon Dioxide in Prussian Blue Analogues M3[Co(CN)6]2, M ) Co, Zn
Journal Article
·
Wed Sep 15 00:00:00 EDT 2010
· Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, 77(1):287–291
·
OSTI ID:1000622
Adsorption Properties of Hydrogen and Carbon Dioxide in Prussian Blue Analogues M3[Co(CN)6]2, M ) Co, Zn
Journal Article
·
Wed Jan 17 23:00:00 EST 2007
· Journal of Physical Chemistry. C
·
OSTI ID:912853