Fractal Strategy for Improving Characterization of N<sub>2</sub> Adsorption–Desorption in Mesopores
The current studies primarily analyze the heterogeneity and complexity of mesopore structures based on low-temperature nitrogen (N<sub>2</sub>) adsorption curves and the Frenkel–Halsey–Hill (FHH) fractal model. However, these studies ignore the fact that the low-temperature N<sub>2...
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2024-10-01
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| Series: | Fractal and Fractional |
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| Online Access: | https://www.mdpi.com/2504-3110/8/11/617 |
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| author | Kunpeng Feng Gaofeng Liu Zhen Zhang Huan Liu Runsheng Lv Xiaoming Wang Ping Chang Jia Lin George Barakos |
| author_facet | Kunpeng Feng Gaofeng Liu Zhen Zhang Huan Liu Runsheng Lv Xiaoming Wang Ping Chang Jia Lin George Barakos |
| author_sort | Kunpeng Feng |
| collection | DOAJ |
| description | The current studies primarily analyze the heterogeneity and complexity of mesopore structures based on low-temperature nitrogen (N<sub>2</sub>) adsorption curves and the Frenkel–Halsey–Hill (FHH) fractal model. However, these studies ignore the fact that the low-temperature N<sub>2</sub> desorption curve can also reflect the desorption performance of the mesopore structure. In this research, novel fractal indicators for characterizing the adsorption–desorption performance of mesopores based on the fractal dimension from the N<sub>2</sub> adsorption curves and N<sub>2</sub> desorption curves are proposed. The novel fractal indicators <i>I</i><sub>1</sub> and <i>I</i><sub>2</sub> are applied to evaluate the adsorption–desorption performance of mesopores with pore size 2–5 nm and pore size 5–50 nm, respectively. The fractal indicator <i>I</i><sub>1</sub> shows an increasing trend with coalification, reflecting that the gas adsorption performance of 2–5 nm mesopores is enhanced with coalification. The fractal indicator <i>I</i><sub>2</sub> exhibits a trend of first increasing and then decreasing with coalification, indicating the gas desorption performance of mesopores with pore size 5–50 nm decreases first and then increases. The proposed indicators provide novel analytical parameters for further understanding the gas adsorption–desorption mechanism of porous coal-based or carbon-based materials. |
| format | Article |
| id | doaj-art-a9e69c8f9eaa49b18cc966c83a84d315 |
| institution | OA Journals |
| issn | 2504-3110 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
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| series | Fractal and Fractional |
| spelling | doaj-art-a9e69c8f9eaa49b18cc966c83a84d3152025-08-20T02:04:57ZengMDPI AGFractal and Fractional2504-31102024-10-0181161710.3390/fractalfract8110617Fractal Strategy for Improving Characterization of N<sub>2</sub> Adsorption–Desorption in MesoporesKunpeng Feng0Gaofeng Liu1Zhen Zhang2Huan Liu3Runsheng Lv4Xiaoming Wang5Ping Chang6Jia Lin7George Barakos8School of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, ChinaKey Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Wuhan 430074, ChinaWA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Kalgoorlie, WA 6430, AustraliaWA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Kalgoorlie, WA 6430, AustraliaWA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Kalgoorlie, WA 6430, AustraliaThe current studies primarily analyze the heterogeneity and complexity of mesopore structures based on low-temperature nitrogen (N<sub>2</sub>) adsorption curves and the Frenkel–Halsey–Hill (FHH) fractal model. However, these studies ignore the fact that the low-temperature N<sub>2</sub> desorption curve can also reflect the desorption performance of the mesopore structure. In this research, novel fractal indicators for characterizing the adsorption–desorption performance of mesopores based on the fractal dimension from the N<sub>2</sub> adsorption curves and N<sub>2</sub> desorption curves are proposed. The novel fractal indicators <i>I</i><sub>1</sub> and <i>I</i><sub>2</sub> are applied to evaluate the adsorption–desorption performance of mesopores with pore size 2–5 nm and pore size 5–50 nm, respectively. The fractal indicator <i>I</i><sub>1</sub> shows an increasing trend with coalification, reflecting that the gas adsorption performance of 2–5 nm mesopores is enhanced with coalification. The fractal indicator <i>I</i><sub>2</sub> exhibits a trend of first increasing and then decreasing with coalification, indicating the gas desorption performance of mesopores with pore size 5–50 nm decreases first and then increases. The proposed indicators provide novel analytical parameters for further understanding the gas adsorption–desorption mechanism of porous coal-based or carbon-based materials.https://www.mdpi.com/2504-3110/8/11/617mesoporefractal strategyN<sub>2</sub> adsorptiondesorptioncoal |
| spellingShingle | Kunpeng Feng Gaofeng Liu Zhen Zhang Huan Liu Runsheng Lv Xiaoming Wang Ping Chang Jia Lin George Barakos Fractal Strategy for Improving Characterization of N<sub>2</sub> Adsorption–Desorption in Mesopores Fractal and Fractional mesopore fractal strategy N<sub>2</sub> adsorption desorption coal |
| title | Fractal Strategy for Improving Characterization of N<sub>2</sub> Adsorption–Desorption in Mesopores |
| title_full | Fractal Strategy for Improving Characterization of N<sub>2</sub> Adsorption–Desorption in Mesopores |
| title_fullStr | Fractal Strategy for Improving Characterization of N<sub>2</sub> Adsorption–Desorption in Mesopores |
| title_full_unstemmed | Fractal Strategy for Improving Characterization of N<sub>2</sub> Adsorption–Desorption in Mesopores |
| title_short | Fractal Strategy for Improving Characterization of N<sub>2</sub> Adsorption–Desorption in Mesopores |
| title_sort | fractal strategy for improving characterization of n sub 2 sub adsorption desorption in mesopores |
| topic | mesopore fractal strategy N<sub>2</sub> adsorption desorption coal |
| url | https://www.mdpi.com/2504-3110/8/11/617 |
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