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Related Experiment Video

Updated: May 6, 2026

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Programmable Pore Environments in Multivariate ZIF Membranes for Ultra-Selective Helium Recovery from Natural Gas.

Yang Liu1, Teng Li1, Ziwen Fan1

  • 1State Key Laboratory of Bioinspired Interfacial Materials Science & College of Chemistry, Chemical Engineering and Materials Science & Jiangsu Key Laboratory of Advanced Functional Polymer Materials, Soochow University, Suzhou 215123, P. R. China.

Journal of the American Chemical Society
|February 26, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed novel multivariate zeolitic imidazolate framework (MTV-ZIF) membranes for efficient helium recovery. These membranes offer ultraselective helium separation from natural gas, significantly reducing energy consumption compared to traditional methods.

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Separation Science

Background:

  • Helium is a critical finite resource vital for medical imaging and semiconductor manufacturing.
  • Current helium production relies on energy-intensive cryogenic separation from natural gas.
  • Existing membrane technologies lack the necessary selectivity for industrial helium recovery.

Purpose of the Study:

  • To develop a novel membrane material for ultraselective helium recovery from natural gas.
  • To investigate pore microenvironment programming in multivariate zeolitic imidazolate framework (MTV-ZIF) membranes.
  • To achieve efficient and low-energy helium separation under realistic industrial conditions.

Main Methods:

  • Fabrication of multivariate zeolitic imidazolate framework (MTV-ZIF) membranes using Zn2+, 2-methylimidazole, and halogen-substituted benzimidazole linkers.
  • Testing membrane performance under simulated industrial feed gas conditions (0.6% He/99.4% CH4).
  • Evaluating membrane stability over extended operation (960 h).
  • Conducting process simulations for a two-stage membrane cascade system.

Main Results:

  • Achieved a record high He/CH4 selectivity of 3174 with the optimized MTV-ZIF membrane.
  • Demonstrated stable membrane operation for 960 hours under realistic conditions.
  • Process simulations indicated a potential >99.95% He purity with an 83% energy reduction compared to cryogenic distillation.

Conclusions:

  • Multivariate pore programming in MOFs is a powerful strategy for efficient helium recovery.
  • Developed MTV-ZIF membranes offer a promising low-energy alternative to cryogenic distillation for helium separation.
  • This approach enables sustainable and cost-effective helium production for critical industrial applications.