Structure–function relations for gravimetric and volumetric methane storage capacities in activated carbon
The complex structure of activated carbon can be described as a three-dimensional network of graphene layers oriented in random directions. In this work, we propose a new model of the microporous structure, taking into account the degree of activation. We derive a structural relation between porosit...
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| Other Authors: | , , , , |
| Format: | article |
| Published: |
2018
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| Online Access: | http://hdl.handle.net/10725/11406 https://doi.org/10.1021/acsomega.8b02233 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://pubs.acs.org/doi/abs/10.1021/acsomega.8b02233 |
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| Summary: | The complex structure of activated carbon can be described as a three-dimensional network of graphene layers oriented in random directions. In this work, we propose a new model of the microporous structure, taking into account the degree of activation. We derive a structural relation between porosity, skeletal density, specific surface area, and the number of graphitic blocks per unit volume. In addition, we present a new approach to evaluate the interdependency between porosity and specific surface area by combining high-resolution scanning transmission electron microscopy and subcritical nitrogen adsorption. Finally, we propose a structural metric that predicts the relation between the volumetric storage capacity and the gravimetric storage capacity of supercritical methane at room temperature. |
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