Adsorption behavior of low-concentration nitrous oxide on natural mordenite zeolite

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2025-02-17 DOI:10.1016/j.micromeso.2025.113550

Saeko Yamaguchi , Peidong Hu , Hanlong Ya , Peipei Xiao , Ayako Nakata , Tsuyoshi Miyazaki , Yoshitada Morikawa , Junko N. Kondo , Kotaro Tange , Kenichi Tonokura , Masanori Takemoto , Yasuo Yonezawa , Toshiyuki Yokoi , Kenta Iyoki , Tatsuya Okubo , Toru Wakihara

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Abstract

Nitrous oxide (N₂O), the third most important greenhouse gas, is discharged from various anthropogenic sources and causes severe environmental problems. Herein, the natural mordenite zeolite is demonstrated to be an effective adsorbent to capture low-concentration N₂O (below 30 ppm). An adsorption capacity of 0.076 mmol g⁻¹ can be achieved at −7 °C with 1 ppm N₂O in the dynamic adsorption test, 6.3 times as high as that at 25 °C. The density functional theory calculations reveal that the Ca-exchanged MOR-type zeolite has stronger interactions with N₂O compared with the Na-exchanged one. However, as evidenced by the isosteric adsorption enthalpy analysis and the Fourier transform infrared spectroscopy, the natural mordenite zeolite with both Na⁺ and Ca²⁺, as well as the synthesized analogue, demonstrates stronger and distinctive interactions with trace N₂O in comparison to the MOR-type zeolites with single kind of extra-framework cation. These results provide experimental and theoretical foundations for the establishment of efficient N₂O removal system using well designed zeolite-based adsorbents under proper operating conditions.

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.