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Absorption increment of various physical/chemical CO2 absorbents using CeO2/SiO2/TiO2 nanocomposite

Abbas Elhambakhsh, Seyedeh Maryam Mousavi, Mohammad Noor Ghasemi, Feridun Esmaeilzadeh, Peyman Keshavarz, Khadijeh Asadi, Ramin Khalifeh Haghighi, and Xiaopo Wang

Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, Shiraz, Iran



Received: 27 September 2021  Accepted: 26 March 2022


In this investigation, CeO2/SiO2/TiO2 nanocomposite was synthesized and used for carbon dioxide (CO2) absorption in a high-pressure batch mode. To do so, the nanocomposite with the concentration range of 0.05–0.15 wt.% was dispersed in distilled water (DW), methyl diethanolamine (MDEA) as a chemical CO2 absorbent and N-Methyl-2-pyrrolidone (NMP) as a physical CO2 absorbent to enhance the absorption of CO2. The influences of initial pressure, solvent type and nanocomposite mass concentration on the CO2 absorption were elucidated. Experimental results demonstrated that the CeO2/SiO2/TiO2/MDEA nanofluid could increase the CO2 absorption up to 8.71% as compared to MDEA solvent alone, the CeO2/SiO2/TiO2/DW nanofluid enhanced the CO2 gas absorption more than 23.47% as compared to DW, and eventually CeO2/SiO2/TiO2/NMP nanofluid improved the CO2 gas absorption more than 13.5% as compared to NMP solution. Moreover, the results obtained from the Zeta potential tests showed that the nanofluids with different base fluids with the nanocomposite concentration of less than 0.1 wt.% have significant stability as compared to those with the nanocomposite concentration of more than 0.1 wt.%. Experimental results of CO2 absorption demonstrated that stable nanofluids have greater CO2 absorption performance in comparison to unstable nanofluids.

Keywords: CO2 absorption; CeO2/SiO2/TiO2; Nanocomposite; MDEA; NMP

Full paper is available at

DOI: 10.1007/s11696-022-02214-z


Chemical Papers 76 (8) 4817–4834 (2022)

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