Background and Objective: The global increase in energy consumption has led to a rise in carbon dioxide emissions, causing significant and often irreparable damages such as global warming. This study investigates the adsorption capacity of hairy nanocrystalline cellulose as a novel adsorbent and seeks to enhance its performance in carbon dioxide capture by modifying it with two types of amines: monoethanolamine and diethanolamine.
Materials and Methods: Hairy nanocrystalline cellulose was synthesized through oxidation and amine modification. The formation of chemical groups and sample morphology was analyzed using Fourier transform infrared spectroscopy and field emission scanning electron microscopy. Additionally, thermogravimetric analysis was performed at two temperatures (25 and 50 °C) and two concentrations (10% and 90% carbon dioxide in nitrogen) to evaluate the adsorption capacity of the samples.
Results: The results showed that at 25 °C and a carbon dioxide concentration of 90%, the adsorption capacities of hairy nanocrystalline cellulose, cellulose modified with 20% by weight of monoethanolamine, and cellulose modified with 20% by weight of diethanolamine were 1.74, 2.5, and 1.96 mmol/g, respectively. These findings indicate that modifying the adsorbent with monoethanolamine increased its carbon dioxide adsorption capacity by approximately 44%, while modification with diethanolamine resulted in a 13% improvement.
Conclusion: The findings suggest that hairy nanocrystalline cellulose, particularly in its modified forms, holds significant promise as a novel and effective adsorbent for carbon dioxide capture.
