Equilibrium and Kinetic Adsorption of Hydrogen Fluoride onto Zeolite 3A
Equilibrium and kinetic adsorption behaviours of hydrogen fluoride (HF) onto zeolite 3A were investigated under different temperatures (298–338 K) and pressures (0.15–1.1 bar). The HF adsorption isotherms on zeolite 3A were well described by the Dubinin–Astakhov (DA) model. The isosteric heat of HF...
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| Format: | Article |
| Language: | English |
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SAGE Publications
2022-01-01
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| Series: | Adsorption Science & Technology |
| Online Access: | http://dx.doi.org/10.1155/2022/5790408 |
| _version_ | 1797287403598118912 |
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| author | Shuo Duan Ke Huang Mengmeng Tao |
| author_facet | Shuo Duan Ke Huang Mengmeng Tao |
| author_sort | Shuo Duan |
| collection | DOAJ |
| description | Equilibrium and kinetic adsorption behaviours of hydrogen fluoride (HF) onto zeolite 3A were investigated under different temperatures (298–338 K) and pressures (0.15–1.1 bar). The HF adsorption isotherms on zeolite 3A were well described by the Dubinin–Astakhov (DA) model. The isosteric heat of HF adsorption was calculated based on the DA model and Clausius–Clapeyron equation, and different kinetic models were used to analyze the HF adsorption kinetic. The results showed HF adsorption isotherms are type I of the IUPAC classification. The maximum adsorption capacities by the DA model are 0.443–0.5631 mg/g. The Hst values decrease with increasing surface loading indicating the surface energy heterogeneity of zeolite 3A. The HF adsorption kinetics on zeolite 3A follows simple first-order kinetics. The calculated film diffusion parameter Bt values show nonlinear characteristics with time. The order of magnitude of interparticle HF diffusion coefficient Dc is 10−9 m2/s. The higher pressure and temperature are in favour of HF diffusion. The intraparticle diffusion curves for HF adsorption on zeolite 3A show quart-linear characteristics, indicating the presence of four consecutive HF adsorption steps including film diffusion, interparticle diffusion, intraparticle diffusion, and surface adsorption. The intraparticle diffusion is a rate-controlling stage. |
| first_indexed | 2024-03-07T18:32:37Z |
| format | Article |
| id | doaj.art-f97d0b4a8acb4488988e5dbcca63e38f |
| institution | Directory Open Access Journal |
| issn | 2048-4038 |
| language | English |
| last_indexed | 2024-03-07T18:32:37Z |
| publishDate | 2022-01-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-f97d0b4a8acb4488988e5dbcca63e38f2024-03-02T06:10:44ZengSAGE PublicationsAdsorption Science & Technology2048-40382022-01-01202210.1155/2022/5790408Equilibrium and Kinetic Adsorption of Hydrogen Fluoride onto Zeolite 3AShuo Duan0Ke Huang1Mengmeng Tao2School of Mining and Geomatics EngineeringState Key Laboratory of Laser Interaction with MatterState Key Laboratory of Laser Interaction with MatterEquilibrium and kinetic adsorption behaviours of hydrogen fluoride (HF) onto zeolite 3A were investigated under different temperatures (298–338 K) and pressures (0.15–1.1 bar). The HF adsorption isotherms on zeolite 3A were well described by the Dubinin–Astakhov (DA) model. The isosteric heat of HF adsorption was calculated based on the DA model and Clausius–Clapeyron equation, and different kinetic models were used to analyze the HF adsorption kinetic. The results showed HF adsorption isotherms are type I of the IUPAC classification. The maximum adsorption capacities by the DA model are 0.443–0.5631 mg/g. The Hst values decrease with increasing surface loading indicating the surface energy heterogeneity of zeolite 3A. The HF adsorption kinetics on zeolite 3A follows simple first-order kinetics. The calculated film diffusion parameter Bt values show nonlinear characteristics with time. The order of magnitude of interparticle HF diffusion coefficient Dc is 10−9 m2/s. The higher pressure and temperature are in favour of HF diffusion. The intraparticle diffusion curves for HF adsorption on zeolite 3A show quart-linear characteristics, indicating the presence of four consecutive HF adsorption steps including film diffusion, interparticle diffusion, intraparticle diffusion, and surface adsorption. The intraparticle diffusion is a rate-controlling stage.http://dx.doi.org/10.1155/2022/5790408 |
| spellingShingle | Shuo Duan Ke Huang Mengmeng Tao Equilibrium and Kinetic Adsorption of Hydrogen Fluoride onto Zeolite 3A Adsorption Science & Technology |
| title | Equilibrium and Kinetic Adsorption of Hydrogen Fluoride onto Zeolite 3A |
| title_full | Equilibrium and Kinetic Adsorption of Hydrogen Fluoride onto Zeolite 3A |
| title_fullStr | Equilibrium and Kinetic Adsorption of Hydrogen Fluoride onto Zeolite 3A |
| title_full_unstemmed | Equilibrium and Kinetic Adsorption of Hydrogen Fluoride onto Zeolite 3A |
| title_short | Equilibrium and Kinetic Adsorption of Hydrogen Fluoride onto Zeolite 3A |
| title_sort | equilibrium and kinetic adsorption of hydrogen fluoride onto zeolite 3a |
| url | http://dx.doi.org/10.1155/2022/5790408 |
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