فهرست نشریات علمی دسترسی آزاد ایران

An increase in the concentration of carbon dioxide in the atmosphere endangers the lives of all living organisms. This research was conducted to investigate the efficiency of nanocrystalline cellulose in adsorbing CO 2 and to improve its performance by modifying it with amine. For this purpose, nanocrystalline cellulose adsorbent was synthesized by acid hydrolysis method, and two types of amine monoethanolamine and diethanolamine were used to improve its performance in CO 2 absorption. To investigate the formation of chemical groups, the morphology of the samples, and their adsorption capacity, FTIR, SEM and TGA were employed. The adsorption study was utilized at temperatures of 25 and 50 °C, and CO 2 concentrations of 10 and 90 vol.%. The results demonstrated that at 25 °C and 90 vol.% CO 2 , the nanocrystalline cellulose modified with 20 wt% monoethanolamine exhibited an adsorption capacity of 1.52 mmol/g. Under the same conditions, the adsorption capacity of pure nanocrystalline cellulose was 0.25 mmol/g. This clearly demonstrates the positive effect of amine modification on nanocrystalline cellulose, leading to a significant increase in its adsorption capacity. According to investigations and comparisons with similar research works, nanocrystalline cellulose, especially in its modified type, can be used as a novel and biodegradable adsorbent in the field of CO 2 adsorption.