journal article·2024-03-26

A Microporous Titanium Metal–Organic Framework with Double Nanotraps for Record CH4/N2 Separation

Puxu Liu, Longlong Fan, Jianhui Li, Zhenduo Wu, Yong Wang, Yang Chen, Junkuo Gao, Jiangfeng Yang, Jinping Li, Banglin Chen, Libo Li

Chemistry of Materials· Volume 36· Issue 6
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Abstract

Reining in global warming has been an international priority, and mitigation targets post-2020 set at the 21st Conference of the Parties (COP21) urge that measures be taken. To significantly increase the utilization efficiency of unconventional natural gas and curtail its effect on global warming, we herein report a titanium metal–organic framework adsorbent with double nanotraps featuring superior CH 4 uptake (1.37 mmol/g) and a high CH 4 /N 2 selectivity (21.6–12.0) at 298 K up to 1 bar. The strong CH 4 confinement of the nanotraps is observed and unveiled using neutron powder diffraction studies and density functional theory calculations. Breakthrough experiments on equimolar CH 4 /N 2 mixtures confirm that CH 4 could be efficiently enriched with a record productivity (13.1 L/kg) through a single separation operation, demonstrating the promising application potential of this microporous material for unconventional natural gas enrichment in industry.
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Research context

OpenAlex topics: Metal-Organic Frameworks: Synthesis and Applications · Covalent Organic Framework Applications · Membrane Separation and Gas Transport

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Chemical Engineering and Technology, State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China

Institute of High Energy Physics, CAS, Beijing 100049, P. R. China

City University of Hong Kong (Dongguan), Dongguan 523000, P. R. China

Institute of Functional Porous Materials, School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China

Fujian Provincial Key Laboratory of Polymer Materials, College of Materials Science and Engineering, Fujian Normal University, Fuzhou 350007, P. R. China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China

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