Modeling and predicting total hydrogen adsorption in nanoporous carbon materials for advanced nuclear systems
| Autor: | Stephen T. Lam, Ronald G. Ballinger, Charles Forsberg |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Hydrogen 020209 energy chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Adsorption Nuclear Energy and Engineering chemistry Amorphous carbon Chemical engineering Chemisorption 0202 electrical engineering electronic engineering information engineering medicine General Materials Science Freundlich equation Graphite 0210 nano-technology Carbon Activated carbon medicine.drug |
| Zdroj: | Journal of Nuclear Materials. 511:328-340 |
| ISSN: | 0022-3115 |
| Popis: | The retention of hydrogen in a variety of disordered carbon materials including graphene nanoplatelets and amorphous carbon was measured by volumetric adsorption and modeled using thermodynamic methods. To date, high temperature hydrogen adsorption research in carbon has predominately focused on graphite used as plasma-facing materials in fusion systems, moderators in high temperature gas reactors, and fuel components in molten-salt cooled reactors. Tritium, a hydrogen isotope that is produced in these systems, adsorbs on carbon surfaces that could be used effectively as sinks to remove tritium. Since hydrogen has chemical similarity to tritium, it can be used as a surrogate to simplify experimental studies, greatly expediting materials exploration. Thus, an understanding and prediction of hydrogen behavior on carbon materials is essential for evaluation of performance and safety of present and future reactor designs. Chemisorption experiments were conducted on 9 different materials with a range of surface areas, pore volumes, and pore size distributions. The results showed that carbons with higher surface area and pore volume exhibit higher hydrogen adsorption, which is attributed to larger quantities of active sites. Further, hydrogen adsorption was found to increase in materials with greater micropore ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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