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

Incorporation of Mn/Zr/Ce into CaO-based sorbents for efficiency CO₂ capture by sol–gel method

Chun-Yan Zhao, Xiu-Li Hu, and Wei Zhou

College of Chemical Engineering, Hebei University of Technology, Tianjin, China

E-mail: 362200922@163.com

Received: 2 September 2024  Accepted: 15 March 2025

Abstract:

Calcium looping represents a high-temperature method designed to capture CO₂, making it appropriate for CO₂ capture from flue gases post-combustion in power plants after combustion or for integration with fuel transformation techniques in pre-combustion CO₂ sequestration systems. This method employs solid sorbents of CaO sourced from natural limestone, leveraging the chemical interaction of CaO with CO₂, which ultimately results in the formation of CaCO₃, thereby facilitating effective CO₂ capture. In this research, multiple metal-incorporated CaO-based sorbents were produced through the sol–gel method. Notably, the CaO-based sorbent with a Ca/Ce doping ratio of 15 demonstrates exceptional CO₂ capture ability and stability, maintaining 13.20 mmol/g of CO₂ adsorption capacity after 20 carbonation/calcination cycles. Various characterization techniques, including X-ray diffraction (XRD), N₂ physisorption, scanning electron microscopy (SEM), high-angle annular dark field scanning transmission electron microscopy/energy dispersive spectroscopy (HAADF-STEM/EDS), temperature-programmed-desorption with CO₂ (CO₂-TPD), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) are employed to demonstrate that the presence of nanoscale CeO₂ significantly enhanced the diffusion of CO₂ during the adsorption process.

Keywords: Caecum; Calcium-based cement; Calcium; Glass-ionomer cement; Porous Materials; Supercapacitors; CO2 capture; Calcium looping; Calcium-based sorbent; Sol–gel method

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-025-04017-4

Chemical Papers 79 (6) 3601–3612 (2025)