Simulation of Water Vapor Sorption Profiles on Activated Carbons in the Context of the Nuclear Industry
Activated carbons (ACs) are employed in the nuclear industry to mitigate the emission of potential radioactive iodine species. Their retention performances towards iodine are mainly dependent on the relative humidity due to the competitive effect induced by adsorbed water molecules. Thus, this work...
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2025-05-01
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| author | Felipe Cabral Borges Martins Mouheb Chebbi Céline Monsanglant-Louvet Bénoit Marcillaud Audrey Roynette |
| author_facet | Felipe Cabral Borges Martins Mouheb Chebbi Céline Monsanglant-Louvet Bénoit Marcillaud Audrey Roynette |
| author_sort | Felipe Cabral Borges Martins |
| collection | DOAJ |
| description | Activated carbons (ACs) are employed in the nuclear industry to mitigate the emission of potential radioactive iodine species. Their retention performances towards iodine are mainly dependent on the relative humidity due to the competitive effect induced by adsorbed water molecules. Thus, this work will focus on the prediction of AC behavior toward the capture of water vapor to better assess the poisoning effect on radiotoxic iodine removal. For the first time, H<sub>2</sub>O breakthrough curves (BTCs) on nuclear grade ACs are predicted through a specific methodology based on the combination of transport phenomena with adsorption kinetics and equilibrium. Three ACs, similar to those deployed in the nuclear context, are considered within the present study. Our model is based on the Linear Driving Force Model (LDF), governed by an intraparticle diffusion mechanism, notably surface and Knudsen diffusions. In addition, the type V isotherms obtained for H<sub>2</sub>O and the investigated carbon supports were described through the Klotz equation, taking into account the formation and progressive growth of H<sub>2</sub>O clusters within the internal porosity. This methodology allowed us to successfully simulate the H<sub>2</sub>O adsorption by a non-impregnated AC, where only physisorption phenomena are involved. In addition, promising results were highlighted when extrapolating to the two other impregnated ACs (AC 5KI and AC Nuclear). |
| format | Article |
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| institution | DOAJ |
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| language | English |
| publishDate | 2025-05-01 |
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| spelling | doaj-art-ec24dab7303f4b28bc239e70a7e1dd582025-08-20T03:12:18ZengMDPI AGSeparations2297-87392025-05-0112512610.3390/separations12050126Simulation of Water Vapor Sorption Profiles on Activated Carbons in the Context of the Nuclear IndustryFelipe Cabral Borges Martins0Mouheb Chebbi1Céline Monsanglant-Louvet2Bénoit Marcillaud3Audrey Roynette4Autorité de Sûreté Nucléaire et de Radioprotection (ASNR), PSN-RES/SCA/LECEV, F-91400 Saclay, FranceAutorité de Sûreté Nucléaire et de Radioprotection (ASNR), PSN-RES/SCA/LECEV, F-91400 Saclay, FranceAutorité de Sûreté Nucléaire et de Radioprotection (ASNR), PSN-RES/SCA/LECEV, F-91400 Saclay, FranceAutorité de Sûreté Nucléaire et de Radioprotection (ASNR), PSN-RES/SCA/LECEV, F-91400 Saclay, FranceAutorité de Sûreté Nucléaire et de Radioprotection (ASNR), PSN-RES/SCA/LECEV, F-91400 Saclay, FranceActivated carbons (ACs) are employed in the nuclear industry to mitigate the emission of potential radioactive iodine species. Their retention performances towards iodine are mainly dependent on the relative humidity due to the competitive effect induced by adsorbed water molecules. Thus, this work will focus on the prediction of AC behavior toward the capture of water vapor to better assess the poisoning effect on radiotoxic iodine removal. For the first time, H<sub>2</sub>O breakthrough curves (BTCs) on nuclear grade ACs are predicted through a specific methodology based on the combination of transport phenomena with adsorption kinetics and equilibrium. Three ACs, similar to those deployed in the nuclear context, are considered within the present study. Our model is based on the Linear Driving Force Model (LDF), governed by an intraparticle diffusion mechanism, notably surface and Knudsen diffusions. In addition, the type V isotherms obtained for H<sub>2</sub>O and the investigated carbon supports were described through the Klotz equation, taking into account the formation and progressive growth of H<sub>2</sub>O clusters within the internal porosity. This methodology allowed us to successfully simulate the H<sub>2</sub>O adsorption by a non-impregnated AC, where only physisorption phenomena are involved. In addition, promising results were highlighted when extrapolating to the two other impregnated ACs (AC 5KI and AC Nuclear).https://www.mdpi.com/2297-8739/12/5/126adsorptionbreakthrough curvesequilibriumKlotz equationkineticsLDF model |
| spellingShingle | Felipe Cabral Borges Martins Mouheb Chebbi Céline Monsanglant-Louvet Bénoit Marcillaud Audrey Roynette Simulation of Water Vapor Sorption Profiles on Activated Carbons in the Context of the Nuclear Industry Separations adsorption breakthrough curves equilibrium Klotz equation kinetics LDF model |
| title | Simulation of Water Vapor Sorption Profiles on Activated Carbons in the Context of the Nuclear Industry |
| title_full | Simulation of Water Vapor Sorption Profiles on Activated Carbons in the Context of the Nuclear Industry |
| title_fullStr | Simulation of Water Vapor Sorption Profiles on Activated Carbons in the Context of the Nuclear Industry |
| title_full_unstemmed | Simulation of Water Vapor Sorption Profiles on Activated Carbons in the Context of the Nuclear Industry |
| title_short | Simulation of Water Vapor Sorption Profiles on Activated Carbons in the Context of the Nuclear Industry |
| title_sort | simulation of water vapor sorption profiles on activated carbons in the context of the nuclear industry |
| topic | adsorption breakthrough curves equilibrium Klotz equation kinetics LDF model |
| url | https://www.mdpi.com/2297-8739/12/5/126 |
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