Nitrous oxide (N O), 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 N O in adipic acid tail gas is of great significance but remains challenging due to the similarity with CO in molecular size and physical properties. Herein, the influence of cation types on CO -N O separation in zeolite was studied comprehensively. In particular, the inverse adsorption of CO -N O was achieved by AgZK-5, which preferentially adsorbs N O over CO , making it capable of trapping N O from an N O/CO mixture. AgZK-5 shows a recorded N O/CO selectivity of 2.2, and the breakthrough experiment indicates excellent performance for N O/CO separation. The density functional theory (DFT) calculation shows that Ag has stronger adsorption energy with N O, and the kinetics of N O is slightly faster than that of CO on AgZK-5.
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