Adsorption Equilibrium and Modeling of Water Vapor on Reduced and Unreduced Silver-Exchanged Mordenite
Abstract
This work is related to the removal of tritiated water and radioactive iodine from off-gases released during spent nuclear fuel reprocessing. Specifically, it is focused on the adsorption equilibrium of water on reduced silver mordenite (Ag0Z), which is the state-of-art solid adsorbent for iodine retention in the off-gas treatment. As the off-gases contain different gas species, including iodine and water, Ag0Z would take up iodine and water simultaneously during the adsorption process. Therefore, understanding the adsorption of water on Ag0Z is important and necessary for studying the performance of Ag0Z in off-gas treatment processes. The isotherms of water (nonradioactive water) on Ag0Z were obtained at temperatures of 25, 40, 60, 100, 150, and 200 °C with a continuous-flow adsorption system. The data were analyzed using the Heterogeneous Langmuir and generalized statistical thermodynamic adsorption (GSTA) models, and thermodynamic parameters of the isotherms were obtained from both models. Both models were found capable of describing the isotherms. Isotherms of water on the unreduced silver mordenite (AgZ) were also obtained at 25, 40, and 60 °C and parametrized by the GSTA model. Through the comparison of the isotherms of Ag0Z and AgZ, it was found that Ag0Z had a higher water adsorption capacitymore »
- Authors:
-
[1];
[2];
[1]
- Syracuse Univ., NY (United States)
- Georgia Inst. of Technology, Atlanta, GA (United States)
- Georgia Inst. of Technology, Atlanta, GA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Nuclear Energy (NE)
- OSTI Identifier:
- 1399935
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Industrial and Engineering Chemistry Research
- Additional Journal Information:
- Journal Volume: 56; Journal Issue: 28; Journal ID: ISSN 0888-5885
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Nan, Yue, Lin, Ronghong, Liu, Jiuxu, Crowl, Tyler B., Ladshaw, Austin, Yiacoumi, Sotira, Tsouris, Costas, and Tavlarides, Lawrence L. Adsorption Equilibrium and Modeling of Water Vapor on Reduced and Unreduced Silver-Exchanged Mordenite. United States: N. p., 2017.
Web. doi:10.1021/acs.iecr.7b01180.
Nan, Yue, Lin, Ronghong, Liu, Jiuxu, Crowl, Tyler B., Ladshaw, Austin, Yiacoumi, Sotira, Tsouris, Costas, & Tavlarides, Lawrence L. Adsorption Equilibrium and Modeling of Water Vapor on Reduced and Unreduced Silver-Exchanged Mordenite. United States. https://doi.org/10.1021/acs.iecr.7b01180
Nan, Yue, Lin, Ronghong, Liu, Jiuxu, Crowl, Tyler B., Ladshaw, Austin, Yiacoumi, Sotira, Tsouris, Costas, and Tavlarides, Lawrence L. Mon .
"Adsorption Equilibrium and Modeling of Water Vapor on Reduced and Unreduced Silver-Exchanged Mordenite". United States. https://doi.org/10.1021/acs.iecr.7b01180. https://www.osti.gov/servlets/purl/1399935.
@article{osti_1399935,
title = {Adsorption Equilibrium and Modeling of Water Vapor on Reduced and Unreduced Silver-Exchanged Mordenite},
author = {Nan, Yue and Lin, Ronghong and Liu, Jiuxu and Crowl, Tyler B. and Ladshaw, Austin and Yiacoumi, Sotira and Tsouris, Costas and Tavlarides, Lawrence L.},
abstractNote = {This work is related to the removal of tritiated water and radioactive iodine from off-gases released during spent nuclear fuel reprocessing. Specifically, it is focused on the adsorption equilibrium of water on reduced silver mordenite (Ag0Z), which is the state-of-art solid adsorbent for iodine retention in the off-gas treatment. As the off-gases contain different gas species, including iodine and water, Ag0Z would take up iodine and water simultaneously during the adsorption process. Therefore, understanding the adsorption of water on Ag0Z is important and necessary for studying the performance of Ag0Z in off-gas treatment processes. The isotherms of water (nonradioactive water) on Ag0Z were obtained at temperatures of 25, 40, 60, 100, 150, and 200 °C with a continuous-flow adsorption system. The data were analyzed using the Heterogeneous Langmuir and generalized statistical thermodynamic adsorption (GSTA) models, and thermodynamic parameters of the isotherms were obtained from both models. Both models were found capable of describing the isotherms. Isotherms of water on the unreduced silver mordenite (AgZ) were also obtained at 25, 40, and 60 °C and parametrized by the GSTA model. Through the comparison of the isotherms of Ag0Z and AgZ, it was found that Ag0Z had a higher water adsorption capacity than AgZ. The comparison of their thermodynamic parameters suggested that the interaction of water molecules with the H+ in Ag0Z was stronger than that with the Ag+ in AgZ.},
doi = {10.1021/acs.iecr.7b01180},
journal = {Industrial and Engineering Chemistry Research},
number = 28,
volume = 56,
place = {United States},
year = {Mon Jun 26 00:00:00 EDT 2017},
month = {Mon Jun 26 00:00:00 EDT 2017}
}
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Works referencing / citing this record:
Hydrogen Isotope (H 2 and D 2 ) Sorption Study of CHA-Type Zeolites
journal, February 2020
- Taguchi, Akira; Nakamori, Takumi; Yoneyama, Yuki
- Fusion Science and Technology, Vol. 76, Issue 3