Artículo
New CaO-based adsorbents prepared by solution combustion and high-energy ball-milling processes for CO2 adsorption: Textural and structural influences
Autor
GRANADOS PICHARDO, ABEL; 632820
GRANADOS CORREA, FRANCISCO; 16289
Sánchez Mendieta, Víctor ; 13230
HERNANDEZ MENDOZA, HECTOR; 219312
GRANADOS PICHARDO, ABEL
GRANADOS CORREA, FRANCISCO
Sánchez Mendieta, Víctor
HERNANDEZ MENDOZA, HECTOR
Institución
Resumen
New CaO-based adsorbents prepared by solution combustion and high-energy ball-milling processes for CO2 adsorption: Textural and structural influences In the present work, new CaO-based adsorbents were obtained by a fast solution combustion method and high-energy ball-milling process to study their CO2 capture behavior under different moderate pressure and temperature conditions. The as-prepared CaO products were characterized systematically using different analytical techniques such as X-ray diffraction, scanning electron microscopy and N2 physisorption measurements. The results showed that the CaO prepared by solution combustion and ball-milled during 2.5 h showed the maximum CO2 adsorption capacity of 9.31 mmol/g at 25 C and 1 atm mainly via chemisorption with CaCO3 formation, which was corroborated by infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy studies. In general, the obtained results revealed that the synthesized CaO nanopowders from solution combustion that were treated by high-energy ball-milling enhanced their CO2 adsorption capacity due to improved structural and textural properties, and this CaO-based adsorbent can be used as a promising material for CO2 capture in post-combustion CO2 capture technologies on a large scale, under atmospheric pressure and temperature conditions.