What question did this study set out to answer?

This research aims to evaluate the CO2 adsorption and desorption capabilities of activated carbon derived from almond shells.

March 18, 2026

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Key Points

This research aims to evaluate the CO2 adsorption and desorption capabilities of activated carbon derived from almond shells.
Conducted cyclic CO2 adsorption-desorption experiments at ~295 K and up to 10 bar pressure
Utilized laboratory-synthesized activated carbon pellets from almond shells
Assessed adsorption efficiency and desorption yields over 20 cycles
Fitted data to the Freundlich isotherm model for equilibrium analysis
CO2 adsorption efficiency ranged from 1 to 0.8 after 9 cycles
Desorption yields stabilized around 40%
Freundlich isotherm model showed strong fit with regression coefficients near 1

Abstract

Cyclic carbon dioxide CO2 adsorption-desorption experiments were conducted at ~295 K and a maximum pressure of 10 bar using laboratory-synthesized activated carbon pellets derived from almond shells. Over 20 cycles, the CO2 adsorption equilibrium on these CA-Am-Pas pellets demonstrated stability from the 9th cycle onward, with adsorption efficiencies ranging from 1 to 0.8 and desorption yields around 40%. Equilibrium modelling across all cycles consistently showed the Freundlich isotherm as the best fit, achieving regression coefficients very close to 1.

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Sonia Ben Yahia

Abdelmottaleb Ouederni

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