CO 2 Adsorption Properties of Amine-Modified Zeolites Synthesized Using Different Types of Solid Waste

Shaojie Li, Shilong Jia, Tetsuya Nagasaka, Hao Bai and Liyun Yang ()
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Shaojie Li: School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30# Xueyuan Road, Haidian District, Beijing 100083, China
Shilong Jia: School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30# Xueyuan Road, Haidian District, Beijing 100083, China
Tetsuya Nagasaka: Department of Metallurgy, Graduate School of Engineering, Tohoku University, 02 Aoba-yama, Sendai 980-8579, Japan
Hao Bai: School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30# Xueyuan Road, Haidian District, Beijing 100083, China
Liyun Yang: School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30# Xueyuan Road, Haidian District, Beijing 100083, China

Sustainability, 2023, vol. 15, issue 13, 1-18

Abstract: In this study, organic amines were used to modify zeolite NaA and analcime synthesized using fly ash and iron tailing slag as raw materials, respectively, and the adsorption properties of the modified zeolites toward CO 2 were determined. We found that when tetraethylenepentamine (TEPA) was used, the modified zeolite NaA and analcime had the highest nitrogen content. The adsorption capacity of the modified zeolite NaA for CO 2 was 4.02 mmol/g and that of the modified analcime was 1.16 mmol/g when the adsorption temperature was 70 °C and the CO 2 flow rate was 50 mL/min. According to the adsorption isotherm, kinetic, and thermodynamic model fitting, the adsorption surface of the modified zeolite was not uniform, and the CO 2 adsorption of the modified zeolites was classified as chemical adsorption. In a mixed atmosphere of 15% CO 2 /85% N 2 , the dynamic selection coefficients of the modified zeolite NaA and analcime for CO 2 were 3.8942 and 2.9509, respectively; thus, the two amine-modified zeolites had good selectivity for CO 2 . After five cycles, the adsorption efficiencies of the modified zeolite NaA and modified analcime for CO 2 were 92.8% and 89%, respectively. Therefore, the two amine-modified zeolites showed good recycling performance.

Keywords: fly ash; iron tailing slag; amine-modified zeolites; CO 2 (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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