فهرست نشریات علمی دسترسی آزاد ایران

The escalating global energy demand has led to increased fossil fuel combustion, elevating atmospheric CO₂ concentrations and exacerbating climate change. This study investigates the enhancement of CO₂ adsorption capacity in biomass-derived materials through amine functionalization, comparing nanocrystalline cellulose (NCC) and activated carbon (AC). Hairy NCC was synthesized via TEMPO-mediated oxidation of cotton linter, while AC was produced through pyrolysis of elderberry kernels. The amine-modified adsorbents were characterized using FTIR spectroscopy and SEM imaging, with CO₂ capture performance evaluated through thermogravimetric analysis at 25°C and 50°C under varying CO₂ concentrations (10-90 vol.%). Results revealed that at 25°C and 90 vol.% CO₂, unmodified NCC and AC exhibited adsorption capacities of 1.74 and 2.78 mmol/g, respectively. After monoethanolamine (MEA) modification, NCC demonstrated improved performance (2.25 mmol/g), while AC capacity decreased to 1.72 mmol/g due to amine-induced pore blockage. The superior performance of amine-modified NCC highlights its potential as an efficient, sustainable alternative to conventional AC for CO₂ capture applications. This study provides critical insights into biomass-derived adsorbents for mitigating anthropogenic CO₂ emissions, with implications for developing cost-effective carbon capture technologies.