Synthetic and natural MOR zeolites as high-capacity adsorbents for the removal of nitrous oxide

• Published in: Chemical communications (Cambridge, England) Vol. 57; no. 11; pp. 1312 - 1315
• Main Authors: Yamashita, Keita, Liu, Zhendong, Iyoki, Kenta, Chen, Ching-Tien, Miyagi, Shoko, Yanaba, Yutaka, Yamauchi, Yusuke, Okubo, Tatsuya, Wakihara, Toru
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 07.02.2021
• Subjects: Adsorbents; Adsorption; Chemical reactions; Nitrous oxide; Trace gases; Zeolites
• ISSN: 1359-7345; 1364-548X
• DOI: 10.1039/d0cc07511f

N 2 O is typically present as a trace gas in chemical processes, but its emission causes serious environmental issues. We herein demonstrate that ion-exchanged mordenite zeolites (framework code: MOR) can exhibit high capacities for N 2 O adsorption under ambient conditions. In particular, a natural MOR zeolite gives an adsorption capacity as high as 0.34 mmol-N 2 O per g-zeolite (1 atm, 25 °C), representing the best performing material among all zeolite-based adsorbents reported so far. The results contribute toward a comprehensive understanding of the structure-activity relationship and offer insights to establishing a zeolite-based adsorption system for enriching or removing N 2 O. Ion-exchanged MOR zeolite gives an adsorption capacity as high as 0.34 mmol-N 2 O/g-zeolite (1 atm, 25 °C), representing the best performing material among all zeolite-based N 2 O adsorbents reported so far.