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

Author

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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)

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.

Suggested Citation

  • Joanna Siemak & Beata Michalkiewicz, 2023. "Adsorption Equilibrium of CO 2 on Microporous Activated Carbon Produced from Avocado Stone Using H 2 SO 4 as an Activating Agent," Sustainability, MDPI, vol. 15(24), pages 1-28, December.
  • Handle: RePEc:gam:jsusta:v:15:y:2023:i:24:p:16881-:d:1300947
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    References listed on IDEAS

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    1. Farihahusnah Hussin & Nur Nadira Hazani & Mohamed Kheireddine Aroua, 2023. "The Effect of Physicochemical Properties and Surface Chemistry on CO 2 Adsorption Capacity of Potassium Acetate-Treated Carbon Pellets," Sustainability, MDPI, vol. 15(6), pages 1-21, March.
    2. Shaojie Li & Shilong Jia & Tetsuya Nagasaka & Hao Bai & Liyun Yang, 2023. "CO 2 Adsorption Properties of Amine-Modified Zeolites Synthesized Using Different Types of Solid Waste," Sustainability, MDPI, vol. 15(13), pages 1-18, June.
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