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Título del libro: Advances On The Carbon Dioxide (co2) Reactivity On Lithium And Sodium Ceramics And Its Catalytic Conversion To Added Value Products
Título del capítulo: CO2 chemisorption and structural analyses of the Na2(Zr1-xAlx)O3-x/2 solid solution

Autores UNAM:
JOSE FRANCISCO GOMEZ GARCIA; GUSTAVO TAVIZON ALVARADO; ENRIQUE JAIME LIMA MUÑOZ; HERIBERTO PFEIFFER PEREA;
Autores externos:

Idioma:
Inglés
Año de publicación:
2015
Resumen:

To determine the influence of the aluminum content in the sodium zirconate during the CO2chemisorption process, specific compounds of the Na2(Zr1-xAlx)O3-x/2 solid solution were synthesized via a solid-state reaction. Samples were characterized using X-ray diffraction and 27Al solid-state nuclear magnetic resonance. Then, samples were tested as CO2 captors using dynamic and isothermal analyses. Additionally, ionic conduction experiments were performed in different sodium containing phases to determine the effect of these phases in the CO2chemisorption process. Characterization results show that aluminum ions can occupy zirconium or sodium sites in the Na2ZrO3 structure. Thus, the aluminum dissolution is compensated by different structural defects. The CO2 capture evaluation shows that the aluminum presence into the Na2ZrO3 structure improves the CO2 chemisorption within certain aluminum content under specific thermal conditions. The CO2 chemisorption differences were attributed to different sodium secondary phases produced in each case and their corresponding diffusion properties. Finally, cyclic performance tests indicate that Na2(Zr1-xAlx)O3-x/2 ceramics exhibited high and stable CO2 capture behaviors. © 2015 The Authors.


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