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<p>This study investigates the CO<sub>2</sub> adsorption performance of peanut shell biochars produced under varying thermochemical process conditions, including different atmospheres (N<sub>2</sub> and CO<sub>2</sub>), temperatures (600, 700 and 800&#xa0;°C), and heating rates (5 and 65&#xa0;°C/min). The biochars were characterized for, textural properties (BET surface area and pore volume) and morphology (SEM). CO<sub>2</sub> adsorption capacity of the biochar samples produced under different experimental conditions was also measured using a thermogravimetric analyzer. Results indicate that increasing pyrolysis temperature generally enhances CO<sub>2</sub> adsorption capacity, with chars produced in a CO<sub>2</sub> atmosphere showing superior performance due to the Boudouard reaction. The highest CO<sub>2</sub> adsorption of 64 mgCO<sub>2</sub>/g<sub>char</sub> was achieved at 700&#xa0;°C and a 65&#xa0;°C/min heating rate under CO<sub>2</sub> atmosphere. The study confirms that pyrolysis conditions significantly influence the structural properties and adsorption capabilities of peanut-shell biochars, highlighting their potential as effective and sustainable adsorbents for CO<sub>2</sub> capture.</p>

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CO2 adsorption evaluation of different biochars produced from peanut shell pyrolysis

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月7日

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  • Jairton Luis Bonato,
  • Daniele Perondi,
  • Christian Manera,
  • Marcia Borghetti,
  • Suelem Daiane Ferreira,
  • Oscar de Almeida Neuwald,
  • Marcelo Godinho

摘要

This study investigates the CO2 adsorption performance of peanut shell biochars produced under varying thermochemical process conditions, including different atmospheres (N2 and CO2), temperatures (600, 700 and 800 °C), and heating rates (5 and 65 °C/min). The biochars were characterized for, textural properties (BET surface area and pore volume) and morphology (SEM). CO2 adsorption capacity of the biochar samples produced under different experimental conditions was also measured using a thermogravimetric analyzer. Results indicate that increasing pyrolysis temperature generally enhances CO2 adsorption capacity, with chars produced in a CO2 atmosphere showing superior performance due to the Boudouard reaction. The highest CO2 adsorption of 64 mgCO2/gchar was achieved at 700 °C and a 65 °C/min heating rate under CO2 atmosphere. The study confirms that pyrolysis conditions significantly influence the structural properties and adsorption capabilities of peanut-shell biochars, highlighting their potential as effective and sustainable adsorbents for CO2 capture.