Synthesis and characterization of calcium oxide nanoparticles for CO2 capture

• DOI: 10.1007/s11051-022-05518-z
• Publication Date: 2022-07-01T14:04:51Z
• Authors: Ei Ei Khine; Daniel Koncz-Horvath; Ferenc Kristaly; Tibor Ferenczi; Gabor Karacs; Peter Baumli; George Kaptay
• Keywords: 01 natural sciences; 0104 chemical sciences

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