煤孔隙中甲烷吸附的多重分形表征

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-05-29 DOI:10.1021/acs.langmuir.5c01807

Kunpeng Feng, Gaofeng Liu, Zhen Zhang, Huan Liu, Runsheng Lv, Xiaoming Wang, Ping Chang, Jia Lin, George Barakos

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引用次数: 0

摘要

目前对煤孔隙中甲烷（CH4）吸附的复杂非均相特征的研究尚未揭示。本文运用多重分形理论探讨了煤孔隙中CH4吸附的复杂性和非均质性。结果表明：广义分形维数D(q)随q的增大呈单调递减的逆s形，多重分形奇异谱函数f（α）与α呈凸函数关系，表明煤孔隙中CH4吸附具有多重分形特征；作为关键的多重分形参数，CH4吸附的广义维谱（q ~ D(q)）和多重分形奇异谱（α ~ f(α)）与煤孔隙(包括微孔（< 2nm）、介孔（2 ~ 50nm）和大孔（> 50nm）的吸附表现出良好的定量关系。这一发现表明，多重分形孔隙结构对CH4吸附的多重分形行为具有控制作用。本研究实现了一种新的表征煤孔隙中CH4吸附的复杂性和非均质性的方法，并从多重分形的角度揭示了煤孔隙中CH4吸附的机理。所得结果在基于分形设计策略的煤基材料合成中具有潜在的理论和应用价值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

$Multifractal Characterization of Methane Adsorption in Coal Pores$

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Multifractal Characterization of Methane Adsorption in Coal Pores

The present research on the complex and heterogeneous characterization of methane (CH₄) adsorption in coal pores has not yet been revealed. In this article, the multifractal theory is employed to explore the complexity and heterogeneity of CH₄ adsorption in coal pores. The results show that the generalized fractal dimension D(q) follows a monotonically decreasing inverse S-shape as q increases, and the multifractal singularity spectrum function f(α) displays a convex functional relationship with α, indicating the presence of multifractal characteristics of the CH₄ adsorption in coal pores. As the key multifractal parameters, the generalized dimension spectrum (q ∼ D(q)) and the multifractal singularity spectrum (α ∼ f(α)) of the CH₄ adsorption present a favorable quantitative relation with that of coal pores, including micropores (<2 nm), mesopores (2–50 nm), and macropores (>50 nm). This finding demonstrates that the multifractal pore structure has a controlled effect on the multifractal behavior of CH₄ adsorption. This study achieves a novel characterizing method on the complexity and heterogeneity of CH₄ adsorption in coal pores and reveals the mechanism of CH₄ adsorption in coal pores from the multifractal perspective. The derived results display potential theoretical and application values in the synthesis of coal-based materials based on a fractal design strategy.

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).