Journal
LANGMUIR
Volume 33, Issue 51, Pages 14586-14591Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.7b03580
Keywords
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Funding
- Department of Energy's Nuclear Energy University Program
- Laboratory Directed Research and Development program at ORNL
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We examine the adsorption of hydrogen and deuterium into the nanoporous nickel phosphate, VSB-5. On the basis of gas sorption analysis, VSB-5 exhibits one of the highest measured I-12 heats of adsorption (HOA) for hydrogen (16 kJ/mol) yet reported. This high HOA is consistent with an unusually large red shift in the Q(1) and Q(0) hydrogen vibrational modes as measured with in situ infrared spectroscopy. The HOA for D, is measured to be 2 kJ/mol higher than that for H2. Ideal adsorbed solution theory analysis of H-2 and D-2 isotherms provides selectivities above 4 for deuterium at 140 K, suggesting that VSB-5 is a promising adsorbent for pressure-swing adsorption-type separations of hydrogen isotopes.
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