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The potential of organic polymer-based hydrogen storage materials.
- Source :
-
Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2007 Apr 21; Vol. 9 (15), pp. 1802-8. Date of Electronic Publication: 2007 Feb 16. - Publication Year :
- 2007
-
Abstract
- The challenge of storing hydrogen at high volumetric and gravimetric density for automotive applications has prompted investigations into the potential of cryo-adsorption on the internal surface area of microporous organic polymers. A range of Polymers of Intrinsic Microporosity (PIMs) has been studied, the best PIM to date (a network-PIM incorporating a triptycene subunit) taking up 2.7% H(2) by mass at 10 bar/77 K. HyperCrosslinked Polymers (HCPs) also show promising performance as H(2) storage materials, particularly at pressures >10 bar. The N(2) and H(2) adsorption behaviour at 77 K of six PIMs and a HCP are compared. Surface areas based on Langmuir plots of H(2) adsorption at high pressure are shown to provide a useful guide to hydrogen capacity, but Langmuir plots based on low pressure data underestimate the potential H(2) uptake. The micropore distribution influences the form of the H(2) isotherm, a higher concentration of ultramicropores (pore size <0.7 nm) being associated with enhanced low pressure adsorption.
Details
- Language :
- English
- ISSN :
- 1463-9076
- Volume :
- 9
- Issue :
- 15
- Database :
- MEDLINE
- Journal :
- Physical chemistry chemical physics : PCCP
- Publication Type :
- Academic Journal
- Accession number :
- 17415491
- Full Text :
- https://doi.org/10.1039/b618053a