Study of highly porous polymers for H2 fuel storage using positron annihilation lifetime spectroscopy

Simple item page
dc.contributor.authorPhalen, Robert
dc.date.accessioned2020-09-09T18:42:29Z
dc.date.available2020-09-09T18:42:29Z
dc.date.issued2015
dc.description.abstractPositron annihilation lifetime spectroscopy (PALS) was applied to study the porosity of four highly porous polymers: Amberlite XAD 4, Amberlite XAD 16, Haysep S and Hypersol-Macronet MN 200, all of which have been evaluated for H2 fuel storage. PALS revealed two types of pores, with average sizes around 2.0 Å and 6.0 Å. It was also determined that the smaller pores have a larger adsorption potential, while the larger pores constitute most of the fractional free volume. At low temperature (77 K), large pores trap most H2 molecules in the condensed gas state, rather than adsorb H2 molecules on their internal wall, as characterized by the Brunauer–Emmett–Teller (BET) method. In addition, it was found that 1) the fractional free volume (fv) of large pores, 2) the uniformity of large pores, and 3) the relative percentage of small pores are all key factors in storing H2 molecules at a low temperature. Ultimately, the PALS technique, one of the most powerful tools in characterizing micropores at the Å scale, can provide more informational (e.g. pore size, number, distribution) and accurate (e.g. fractional free volume rather than specific surface area) knowledge on the porosity of materials potentially used for H2 fuel storage in the future.en_US
dc.identifier.citation2015 Zhang, R.*, Phalen, R.N., Cataquis, A., Desta, M., and Kloesel, M. “Study of highly porous polymers for H2 fuel storage using positron annihilation lifetime spectroscopy” International Journal of Hydrogen Energy, 40 (2015) 8732 – 8741.en_US
dc.identifier.urihttps://hdl.handle.net/10657.1/2464
dc.language.isoen_USen_US
dc.publisherInternational Journal of Hydrogen Energyen_US
dc.subjectHydrogen storage Positron annihilation lifetime spectroscopy Highly porous polymersen_US
dc.titleStudy of highly porous polymers for H2 fuel storage using positron annihilation lifetime spectroscopyen_US
dc.typeArticleen_US

Files

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
Study of highly porous polymers for H2 fuel storage using positron annihilation lifetime spectroscopy.pdf
Size:
151.55 KB
Format:
Adobe Portable Document Format
Description:
Download

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

College of Science and Engineering
Robert N. Phalen