The Effect of Physicochemical Properties and Surface Chemistry on CO 2 Adsorption Capacity of Potassium Acetate-Treated Carbon Pellets

Farihahusnah Hussin (), Nur Nadira Hazani and Mohamed Kheireddine Aroua
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Farihahusnah Hussin: Research Centre for Carbon Dioxide Capture and Utilisation (CCDCU), School of Engineering and Technology, Sunway University, Bandar Sunway, Petaling Jaya 47500, Selangor, Malaysia
Nur Nadira Hazani: Research Centre for Carbon Dioxide Capture and Utilisation (CCDCU), School of Engineering and Technology, Sunway University, Bandar Sunway, Petaling Jaya 47500, Selangor, Malaysia
Mohamed Kheireddine Aroua: Research Centre for Carbon Dioxide Capture and Utilisation (CCDCU), School of Engineering and Technology, Sunway University, Bandar Sunway, Petaling Jaya 47500, Selangor, Malaysia

Sustainability, 2023, vol. 15, issue 6, 1-21

Abstract: The aim of this study is to prepare a carbon pellet using low-cost material and a green process with excellent surface properties for carbon dioxide (CO 2 ) capture application. To enhance the surface properties of the carbon pellet, a chemical activation method was introduced by modifying the pellet with potassium acetate. Then, the carbon pellet was tested in a packed-bed adsorption column to evaluate their performance for breakthrough time and CO 2 adsorption. The effect of the physicochemical and surface chemistry of the carbon pellet on CO 2 adsorption was also studied. The SEM image showed remarkable changes in the surface morphology of the carbon pellet after modification with potassium acetate. In addition, the presence of oxygen-containing functional groups such as hydroxyl and carbonyl groups in the modified carbon pellet could effectively enhance the CO 2 adsorption capacity. Thus, it is proven that the carbon pellet modified with potassium acetate is suitable for CO 2 adsorption. The results revealed that the CAC-PA 2M obtained the longest breakthrough time (19.4 min), higher adsorption capacity (0.685 mmol/g), and good recyclability (the regenerated sample can be reused for more than five cycles). The comprehensive characterization study and CO 2 adsorption experimental data on new carbon pellets can provide a direction for new researchers that are venturing into the CO 2 capture field.

Keywords: activated carbon; carbon pellet; cellulose; CO 2 adsorption; potassium acetate; regeneration (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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