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1 March 2019

"Molecular sieves" could lead to much cheaper gas production

Schematics of ethane diffusion in ZIF-7-8.  Schematics of ethane diffusion in ZIF-7-8. Sergey Vasenkov

Combining high-field NMR with infrared microscopy, scientists learned more about how gas diffuses in a novel class of molecular sieves that could one day be used for gas separation.

What did the scientists discover?

For the first time, scientists showed that high-field nuclear magnetic resonance (NMR) can be combined with single crystal infrared (IR) microscopy to quantify and understand microscopic gas transport in a novel class of porous molecular sieves called zeolitic imidazolate frameworks (ZIFs). These materials are highly promising candidates for gas separation applications.

THE TOOLS THEY USED

This research was conducted in the 750 MHz MRI system and 600 MHz NMR & MRI/S System at the MagLab's AMRIS Facility located at the University of Florida.

Why is this important?

Currently, about half of all the energy required for industrial-scale gas production is used to separate gasses. Porous membranes made with ZIFs could make that process 10 times cheaper. In order to design molecular sieves to separate a specific gas from a mixture of gases, however, scientists must continue to develop a fundamental understanding of molecular transport on microscopic length scales.

Who did the research?

Samuel Berens1, Christian Chmelik2, Febrian Hillman3, Jörg Kärger2, Hae-Kwon Jeong3, Sergey Vasenkov1

1University of Florida; 2Leipzig University; 3Texas A&M University

Why did they need the MagLab?

This research relied on MagLab instrumentation that combines high magnetic field and large magnetic field gradients in NMR diffusion studies.

Details for scientists

Funding

This research was funded by the following grants: G.S. Boebinger (NSF DMR-1157490, NSF DMR-1644779); H.-K. Jeong (NSF CMMI-1561897); S. Vasenkov (NSF CMMI-1561347)


For more information, contact Joanna Long.

Details

  • Research Area: Chemistry - Nanomaterials, Chemistry - Petroleum,Engineering Materials
  • Research Initiatives: Energy,Materials
  • Facility / Program: AMRIS
  • Year: 2019
Last modified on 1 March 2019