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<p>In this paper, low-cost carbonaceous materials were obtained from Turkish coffee grounds by one-pot physical activation under an air atmosphere at 300 and 500&#xa0;°C for CO<sub>2</sub> capture. The characterization of these adsorbents was conducted to investigate their structural properties. One of these adsorbents, which was calcined at 500&#xa0;°C, exhibits an impressive CO<sub>2</sub> capturing performance (20.07 mmol/g) at ambient conditions (25&#xa0;°C, 1&#xa0;atm). The experimental data were found to be in complete correlation with the Freundlich isotherm model. Thermodynamic data proved that the reaction occurred spontaneously. Briefly, the results reveal that calcinated Turkish Coffee Grounds have high potential to adsorb the main greenhouse gas without utilizing any pretreatment with hazardous solvents and chemicals in their preparation. The success of this material was primarily based on its high surface area (2,534&#xa0;m²/g), natural carbonate content, and layered structure.</p>

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Unraveling the effects of calcination on the properties and CO2 capture performance of Turkish coffee grounds

  • 期刊论文

  • 发表日期：

    2026年5月12日

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  • Gamze Özçakır

摘要

In this paper, low-cost carbonaceous materials were obtained from Turkish coffee grounds by one-pot physical activation under an air atmosphere at 300 and 500 °C for CO2 capture. The characterization of these adsorbents was conducted to investigate their structural properties. One of these adsorbents, which was calcined at 500 °C, exhibits an impressive CO2 capturing performance (20.07 mmol/g) at ambient conditions (25 °C, 1 atm). The experimental data were found to be in complete correlation with the Freundlich isotherm model. Thermodynamic data proved that the reaction occurred spontaneously. Briefly, the results reveal that calcinated Turkish Coffee Grounds have high potential to adsorb the main greenhouse gas without utilizing any pretreatment with hazardous solvents and chemicals in their preparation. The success of this material was primarily based on its high surface area (2,534 m²/g), natural carbonate content, and layered structure.