ADSORPTION EQUILIBRIA OF HYDROGEN, DEUTERIUM, AND THEIR MIXTURES. PART I
Adsorption isotherms of hydrogen and deuterium were measured at temperatures of 75 to 90 deg K and pressures up to 160 mm Hg on the following adsorbents: charcoal, silica gel, and Linde molecular sieves type 4A, 5A, and 13X. Deuterium was found to be adsorbed to a greater extent than hydrogen in all cases investigated, its isosteric heat of adsorption exceeding that of hydrogen by 50 to 300 cal/mole. Binary adsorption isotherms were determined on the same adsorbents in the range 10 to 90% D/sub 2/ at temperatures of 75 and 90 deg K and a total pressure pi of 750 and 100 mm Hg. The analyses were performed by thp thermal conductivity method using thermistor sensing elements in a static system at atmospheric pressure. The device proved of exceptional stability, requiring no recalibrations and yielding in analytical accuracy of better than 0.02% deuterium content. The binary separation factors alpha were found to be constant over the concentration range investigated, with values for alpha varying from about 1.15 on charcoal to 2.54 on type 4A molecular sieves at 75 deg K and 750 mm Hg. The results suggest that the variations in alpha are due mainly to differences in chemical composition of the adsorbents rather than pore size, surface area, or origin of the materials. (auth)
- Research Organization:
- Univ. of Toronto
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-14-005101
- OSTI ID:
- 4217600
- Journal Information:
- Canadian Journal of Chemistry (Canada), Vol. Vol: 38; Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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