Efficient Helium Separation with Two-Dimensional Metal-Organic Framework Fe/Ni-PTC: A Theoretical Study.

Area of Science:

• Materials Science
• Chemical Engineering
• Nanotechnology

Background:

• Helium (He) is a critical strategic material for defense and high-tech sectors.
• Global He supply shortages pose significant challenges.
• Metal-organic frameworks (MOFs) offer advantageous properties like porosity for gas separation.

Purpose of the Study:

• To investigate the helium permeability and filtration performance of novel 2D Fe-PTC and Ni-PTC MOFs.
• To evaluate their potential for He purification applications.

Main Methods:

• First-principles calculations.
• Molecular dynamics (MD) simulations.
• Analysis of He separation performance in 2D MOFs.

Main Results:

• Both Fe-PTC and Ni-PTC MOFs exhibit superior He separation capabilities.
• Exceptional selectivity of He over N₂ (Fe-PTC: ~10¹⁷, Ni-PTC: ~10¹⁵).
• High He permeance (10⁻⁴–10⁻³ mol s⁻¹ m⁻² Pa⁻¹) observed across a wide temperature range (200–500 K).

Conclusions:

• Fe-PTC and Ni-PTC MOFs represent highly promising membranes for He separation.
• These materials have significant potential for industrial applications in He purification.
• The study provides a pathway towards addressing He resource scarcity through advanced membrane technology.