Influence of porous substrate on copper based oxygen carrier efficiency for chemical-looping combustion
| Autor: | Thomas Graule, Christos G. Aneziris, Eugenio H. Otal, Frank Clemens, Noemie van Garderen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Oxygen carrier support
Materials science Mineralogy chemistry.chemical_element Redox law.invention Reaction rate law Specific surface area General Materials Science Calcination Porosity Microstructure Otras Ciencias Químicas Attrition resistance Ciencias Químicas General Chemistry Condensed Matter Physics Copper chemistry Chemical engineering Mechanics of Materials Looping efficiency Chemical looping combustion CIENCIAS NATURALES Y EXACTAS |
| Popis: | The efficiency of impregnated redox material and its cycling behaviour by tailoring macro- to mesoporosity of different support compositions for fluidized-bed application was investigated. Supports are composed of clay and diatomite, alumina, alumina and diatomite, alumina diatomite and silica. The porous supports were impregnated with 1.5 M copper nitrate trihydrate and calcined at 850 °C. Higher presence of copper has been determined on samples composed of higher specific surface area and larger pore size distribution. Presence of CuO and Cu2O phases were obtained in silica based samples (clay, diatomite or silica nanoparticles), whereas CuAl2O4 dominated in samples with high alumina content. Reaction rate during reduction increased with silica, while total conversion was reduced. Highest conversion was obtained for alumina samples because of the aggregation of copper on pure silica surfaces. It is assumed that after infiltration of 10 wt.% copper phase, surface chemistry is of great importance compared to pore size. Wet impregnation had no effect on attrition resistance. Fil: van Garderen, Noemie. Eidgenössische Materialprüfungs- und Forschungsanstalt; Suiza. Technical University Bergakademie Freiberg. Institute for Ceramic, Glass- and Construction Materials; Alemania Fil: Otal, Eugenio Hernan. Universidad Tecnológica Nacional. Facultad Regional Santa Cruz; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina. Eidgenössische Materialprüfungs- und Forschungsanstalt; Suiza Fil: Aneziris, Christos G.. Technical University Bergakademie Freiberg. Institute for Ceramic, Glass- and Construction Materials; Alemania Fil: Graule, Thomas. Eidgenössische Materialprüfungs- und Forschungsanstalt; Suiza. Technical University Bergakademie Freiberg. Institute for Ceramic, Glass- and Construction Materials; Alemania Fil: Clemens, Frank J.. Eidgenössische Materialprüfungs- und Forschungsanstalt; Suiza |
| Databáze: | OpenAIRE |
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