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<p>This study presents a novel hybrid approach for producing mesoporous activated carbon (AC) from date palm leaves by integrating conventional carbonization with microwave-assisted activation. K₂CO₃ was utilized for chemical activation to enhance adsorption performance. Three critical parameters, namely microwave power, residence time, and activation temperature, were investigated focusing on yield, temperature ramp-up time, and CO₂ capture capacity. Results reveal that both microwave power and activation temperature were pivotal in influencing the yield and adsorption efficiency. Microwave-assisted activation (850&#xa0;W, 500&#xa0;°C, 7&#xa0;min) yielded an optimal CO₂ adsorption capacity of 126.7&#xa0;mg/g at 25&#xa0;°C and 1&#xa0;bar, with 78% and 76% reductions in activation energy and processing time, respectively. This method enhanced the textural properties of the activated carbon, increasing the surface area to 411&#xa0;m²/g and improving pore size distribution, as compared to conventional thermal activation (60&#xa0;min under CO₂), which achieved only 88&#xa0;mg/g uptake and a surface area of 286&#xa0;m²/g. Compared to conventional methods, the hybrid approach reduced energy and time demands to about 25%.</p>

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Microwave-assisted enhanced activation of date palm leaf char for optimized CO2 adsorption

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月7日

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  • S. K. Al-Janabi,
  • Hind Shabbani,
  • James M. Courtney,
  • Andrew R. Barron,
  • M. R. Othman

摘要

This study presents a novel hybrid approach for producing mesoporous activated carbon (AC) from date palm leaves by integrating conventional carbonization with microwave-assisted activation. K₂CO₃ was utilized for chemical activation to enhance adsorption performance. Three critical parameters, namely microwave power, residence time, and activation temperature, were investigated focusing on yield, temperature ramp-up time, and CO₂ capture capacity. Results reveal that both microwave power and activation temperature were pivotal in influencing the yield and adsorption efficiency. Microwave-assisted activation (850 W, 500 °C, 7 min) yielded an optimal CO₂ adsorption capacity of 126.7 mg/g at 25 °C and 1 bar, with 78% and 76% reductions in activation energy and processing time, respectively. This method enhanced the textural properties of the activated carbon, increasing the surface area to 411 m²/g and improving pore size distribution, as compared to conventional thermal activation (60 min under CO₂), which achieved only 88 mg/g uptake and a surface area of 286 m²/g. Compared to conventional methods, the hybrid approach reduced energy and time demands to about 25%.