Abstract

Abstract

In this paper, the preparation of calcium oxide (CaO) nanoparticles (NPs) is reported by a precipitation method, using CaCl2 and NaOH as starting raw materials. The produced NPs were characterized for chemical composition, phase composition, particle size distribution, morphological features, specific surface area, and crystallite sizes. It is shown that calcination of Ca(OH)2 in vacuum takes place faster/at a lower temperature compared to the calcination in air due to the higher entropy of the gaseous product of calcination. It is also shown that when these CaO nanoparticles are kept at room temperature in air, they fully and spontaneously transform into CaCO3 within 3 weeks. Therefore, if this material is disposed in open fields (not necessarily in industrial conditions), it is able to capture carbon dioxide from normal air slowly, but surely. However, when the CaO nanoparticles are kept in the air at 100–200 °C, they mostly capture water vapor from the air instead of carbon dioxide, and the resulting calcium hydroxide blocks the carbon dioxide capture by CaO nanoparticles.

Details

Title
Synthesis and characterization of calcium oxide nanoparticles for CO2 capture
Author
Khine, Ei Ei 1 ; Koncz-Horvath, Daniel 1 ; Kristaly, Ferenc 2 ; Ferenczi, Tibor 3 ; Karacs, Gabor 4 ; Baumli, Peter 1 ; Kaptay, George 5   VIAFID ORCID Logo 

1  University of Miskolc, Institute of Physical Metallurgy, Metal Forming and Nanotechnology, Miskolc, Hungary (GRID:grid.10334.35) (ISNI:0000 0001 2254 2845) 
2  University of Miskolc, Institute of Mineralogy and Geology, Miskolc, Hungary (GRID:grid.10334.35) (ISNI:0000 0001 2254 2845) 
3  University of Miskolc, Institute of Metallurgy, Miskolc, Hungary (GRID:grid.10334.35) (ISNI:0000 0001 2254 2845) 
4  University of Miskolc, ELKH-ME Materials Science Research Group, ELKH, Miskolc, Hungary (GRID:grid.10334.35) (ISNI:0000 0001 2254 2845) 
5  University of Miskolc, Institute of Physical Metallurgy, Metal Forming and Nanotechnology, Miskolc, Hungary (GRID:grid.10334.35) (ISNI:0000 0001 2254 2845); University of Miskolc, ELKH-ME Materials Science Research Group, ELKH, Miskolc, Hungary (GRID:grid.10334.35) (ISNI:0000 0001 2254 2845) 
Publication year
2022
Publication date
Jul 2022
Publisher
Springer Nature B.V.
ISSN
13880764
e-ISSN
1572896X
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1007/s11051-022-05518-z
ProQuest document ID
2682982478
Copyright
© The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.