Adsorption Equilibrium of CO 2 on Microporous Activated Carbon Produced from Avocado Stone Using H 2 SO 4 as an Activating Agent

Joanna Siemak and Beata Michalkiewicz ()
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Joanna Siemak: Department of Catalytic and Sorbent Materials Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów Ave. 42, 71-065 Szczecin, Poland
Beata Michalkiewicz: Department of Catalytic and Sorbent Materials Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów Ave. 42, 71-065 Szczecin, Poland

Sustainability, 2023, vol. 15, issue 24, 1-28

Abstract: In this study, we conducted a comprehensive investigation into activated carbons derived from avocado stones produced through chemical activation using sulfuric acid. The analysis encompassed X-ray diffraction (XRD) spectra, FTIR, SEM and essential textural parameters, namely specific surface area, total pore volume, and micropore volume. Moreover, we scrutinized carbon dioxide adsorption isotherms and subjected the experimental data to fit with both two-parameter and four-parameter equilibrium isotherm models. To achieve the most accurate parameter estimation, five error functions were employed. Furthermore, we calculated the isosteric heat of adsorption for the most promising CO 2 sorbent, providing valuable insights into the thermodynamic aspects of the adsorption process.

Keywords: CO 2 adsorption; adsorption equilibrium; adsorption isotherms; error functions (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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