CO2 Adsorption Properties of Amine-Modified Zeolites Synthesized Using Different Types of Solid Waste

In this study, organic amines were used to modify zeolite NaA and analcime synthesized using fly ash iron tailing slag as raw materials, respectively, the adsorption properties of modified zeolites toward CO2 determined. We found that when tetraethylenepentamine (TEPA) was used, had highest nitrogen content. The capacity for 4.02 mmol/g 1.16 temperature 70 °C flow rate 50 mL/min. According isotherm, kinetic, thermodynamic model fitting, surface not uniform, classified chemical adsorption. a mixed atmosphere 15% CO2/85% N2, dynamic selection coefficients 3.8942 2.9509, respectively; thus, two amine-modified good selectivity CO2. After five cycles, efficiencies 92.8% 89%, respectively. Therefore, showed recycling performance.