Journal
ARABIAN JOURNAL OF CHEMISTRY
Volume 13, Issue 1, Pages 171-183Publisher
ELSEVIER
DOI: 10.1016/j.arabjc.2017.03.005
Keywords
CaO-based adsorbents; CO2 capture; Solution combustion synthesis; Ball-milling process; Textural properties; Structural influences
Categories
Funding
- National Institute of Nuclear Research (ININ) [ININ CB-406]
- Department of Chemistry [ININ CB-406]
- UAEMex (CONACYT project) [388496]
- CONACYT
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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 N-2 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 degrees 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. (C) 2017 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University.
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