In situ synthesis of copper-based mordenite for nitrogen/methane sieving

Xuan Tang, Xiaowei Bai, Yating Wang, Xiaomin Li, Feifei Zhang, Li Wang, Xiaoqing Wang, Jinping Li () and Jiangfeng Yang ()
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Xuan Tang: Taiyuan University of Technology
Xiaowei Bai: Taiyuan University of Technology
Yating Wang: Taiyuan University of Technology
Xiaomin Li: Taiyuan University of Technology
Feifei Zhang: Taiyuan University of Technology
Li Wang: Taiyuan University of Technology
Xiaoqing Wang: Taiyuan University of Technology
Jinping Li: Taiyuan University of Technology
Jiangfeng Yang: Taiyuan University of Technology

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract Achieving low-energy and high-efficiency sieving of nitrogen rejection from methane in natural gas purification processes requires precise control of material pore size with a resolution of 0.1–0.2 Å, which is highly challenging. Here, we report a novel adsorbent (MOR-Cu), a mordenite with copper introduced in situ via high-temperature crystallization, enabling precise sieving of nitrogen and methane by the appropriate pore size and pore geometry. Refinement of the crystal structure shows that the higher crystallization temperature changes the position of the copper component, increasing pore volume and enhancing nitrogen adsorption capacity and kinetics. MOR-Cu-210 obtained by crystallization at 210 °C exhibits a record nitrogen adsorption capacity (0.74 mmol g–1) and nitrogen/methane uptake ratio (62.1) at 298 K and 1 bar, breaking the bottleneck of adsorption capacity and selectivity. Cyclic gas adsorption tests and column breakthrough experiments confirm high separation performance and stable recyclability.

Date: 2025
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DOI: 10.1038/s41467-025-63537-5

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