The impact of effective pore percentage on CH4/N2 separation in coal-based activated carbon
The efficient separation of CH/N using activated carbon depends on the strict regulation of carbon pore structure. However, the relationship between pore structure and separation performance remains inadequately explored in the literature. This study employed a sample set comprising 38 coal-based granular activated carbons with diverse pore structural parameters to investigate the impact of pore size distribution on CH/N separation using advanced statistical methods. Through Pearson’s correlation analysis, this study reveals that the effective pores for CH/N separation in coal-based activated carbon are those with diameters less than 1 nm, with the optimal pore size range being 0.4–0.7 nm. A novel pore structural parameter, effective pore percentage, was proposed, which exhibits a stronger correlation to separation performance and predicts the separation performance of the activated carbon more accurately than commonly used parameters. Ridge regression analysis revealed that a high proportion of effective pores (< 1 nm) generally results in higher separation efficiency, while an excessively high proportion of larger pores (> 1 nm) can diminish the separation performance of CH/N. This study has important implications for investigating the separation mechanism of coal-based activated carbon for CH/N and for developing efficient coal-based activated carbon for purifying coalbed gas. Graphical abstract: [Figure not available: see fulltext.].
Chongqing Science and Technology Commission[cstc2018jcyj-yszxX0005];Natural Science Foundation Project of Chongqing, Chongqing Science and Technology Commission[cstc2018jcyj-yszxX0005];Chongqing Science and Technology Commission[cstc2020yszx-jcyjX0008];Natural Science Foundation Project of Chongqing, Chongqing Science and Technology Commission[cstc2020yszx-jcyjX0008];
|WOS Research Area|
Materials Science, Multidisciplinary
|WOS Accession No|
|ESI Research Field|
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||Department of Earth and Space Sciences|
1.State Key Laboratory of Coal Mine Disaster Dynamics and Control,School of Resources and Safety Engineering,Chongqing University,Chongqing,400044,China
2.Department of Earth and Space Science,Southern University of Science and Technology,Shenzhen,518055,China
|Corresponding Author Affilication||Department of Earth and Space Sciences|
Xu，Ran,Xian，Xuefu,Song，Zhenlong,et al. The impact of effective pore percentage on CH4/N2 separation in coal-based activated carbon[J]. Journal of Materials Science,2023,58(34):13635-13648.
Xu，Ran,Xian，Xuefu,Song，Zhenlong,&Gu，Min.(2023).The impact of effective pore percentage on CH4/N2 separation in coal-based activated carbon.Journal of Materials Science,58(34),13635-13648.
Xu，Ran,et al."The impact of effective pore percentage on CH4/N2 separation in coal-based activated carbon".Journal of Materials Science 58.34(2023):13635-13648.
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