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Related Concept Videos

High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...

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Related Experiment Video

Updated: Jul 13, 2026

Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5
09:46

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Flexible ZSM-5 Zeolite Membrane for High-Performance Helium Separation.

Yongyan Deng1, Fuxin Qiu2, Jiaxing Wu3

  • 1Faculty of Chemistry, Northeast Normal University, Changchun, 130024, China.

Angewandte Chemie (International Ed. in English)
|November 19, 2024
PubMed
Summary

Researchers developed crack-free ZSM-5 zeolite membranes on flexible polytetrafluoroethylene (PTFE) supports. These membranes show high helium permeance and separation factors, enabling efficient helium extraction from natural gas.

Keywords:
gas separationhelium recoverymembranemolecular sievezeolite

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Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5
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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Membrane Technology

Background:

  • Flexible zeolite membranes are crucial for gas separations like helium recovery.
  • Synthesizing defect-free zeolite membranes on flexible supports presents a significant challenge.

Purpose of the Study:

  • To fabricate crack-free ZSM-5 zeolite membranes on polytetrafluoroethylene (PTFE) supports.
  • To evaluate the performance of these membranes for helium separation.

Main Methods:

  • Utilized a seeded growth method for ZSM-5 zeolite membrane fabrication.
  • Employed polytetrafluoroethylene (PTFE) as a flexible support material.
  • Tested membrane performance using helium and other gases (N2, CH4) in mixtures.

Main Results:

  • Achieved unprecedented helium permeance (>6.7×10⁻⁷ mol m⁻² s⁻¹ Pa⁻¹).
  • Obtained high He/N2 (17) and He/CH4 (83) separation factors.
  • Demonstrated stable performance under mechanical stress (bending, stretching) and in multicomponent gas mixtures.

Conclusions:

  • Successfully fabricated high-performance, flexible ZSM-5 zeolite membranes on PTFE supports.
  • These membranes show significant potential for practical, large-scale helium extraction from natural gas.
  • The developed fabrication method offers a promising route for advanced membrane applications.