Inverse Adsorption Separation of N2O/CO2 in AgZK‐5 Zeolite

Author:

Wang Li1,Lin Caihong1,Boldog István2,Yang Jiangfeng13ORCID,Janiak Christoph2,Li Jinping13

Affiliation:

1. College of Chemical Engineering and Technology Taiyuan University of Technology Taiyuan 030024 Shanxi China

2. Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf 40225 Düsseldorf Germany

3. State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of Technology Taiyuan 030024 Shanxi China

Abstract

AbstractNitrous oxide (N2O), as the third largest greenhouse gas in the world, also has great applications in daily life and industrial production, like anesthetic, foaming agent, combustion supporting agent, N or O atomic donor. The capture of N2O in adipic acid tail gas is of great significance but remains challenging due to the similarity with CO2 in molecular size and physical properties. Herein, the influence of cation types on CO2−N2O separation in zeolite was studied comprehensively. In particular, the inverse adsorption of CO2−N2O was achieved by AgZK‐5, which preferentially adsorbs N2O over CO2, making it capable of trapping N2O from an N2O/CO2 mixture. AgZK‐5 shows a recorded N2O/CO2 selectivity of 2.2, and the breakthrough experiment indicates excellent performance for N2O/CO2 separation. The density functional theory (DFT) calculation shows that Ag+ has stronger adsorption energy with N2O, and the kinetics of N2O is slightly faster than that of CO2 on AgZK‐5.

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

General Chemistry,Catalysis

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