Conjugated processes of bulk aluminum and hydrogen combustion in water-oxygen mixtures
| Autor: | Oxana N. Fedyaeva, A.V. Shishkin, Anatoly A. Vostrikov |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Aqueous solution
Materials science Hydrogen Renewable Energy Sustainability and the Environment Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Atmospheric temperature range 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Combustion complex mixtures 01 natural sciences Oxygen 0104 chemical sciences chemistry.chemical_compound Fuel Technology chemistry Aluminium 0210 nano-technology Hydrogen peroxide Water vapor |
| Zdroj: | International Journal of Hydrogen Energy. 45:1061-1071 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2019.10.152 |
| Popis: | The article deals with the investigation of the combustion of aluminum bulk samples in water vapor, an aqueous solution of hydrogen peroxide (33.1 wt%), and water-oxygen mixture at uniform heating of the reactor (1 K/min) up to 773 K. It is revealed that the major portion of hydrogen peroxide is decomposed directly in aqueous solution. The resulting oxygen, as well as oxygen added to the water, provided oxidation of only a part of hydrogen (≈25%) released during the complete oxidation of aluminum by water. The time dependences of the reactants’ temperature and pressure, as well as the temperature corresponding to the onset of the H2 release were determined. The most intense oxidation of aluminum in water vapor was noted within the temperature range of 593–769 K, as well as in a hydrogen peroxide solution at 548–693 K, and in H2O/O2 mixture at 567–742 K. It is revealed that the oxidation of hydrogen with oxygen intensifies water oxidation of aluminum to a greater extent than it follows from the heat effects of H2 oxidation. As a result of oxidation, a loose powder of aluminum oxide nanoparticles was obtained. |
| Databáze: | OpenAIRE |
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