ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

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

E-mail: pkeshavarz@shirazu.ac.ir

Received: 27 September 2021  Accepted: 26 March 2022

Abstract:

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 www.springerlink.com.

DOI: 10.1007/s11696-022-02214-z

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