THE EXTREME SENSITIVITY OF PARAMAGNETIC SITES TO POISONING BY DESORBED GASES EVALUATED BY THE LOW TEMPERATURE ORTHO—PARAHYDROGEN CONVERSION
Journal Article
·
· Journal of Physical Chemistry
The effect of gaseous impurities from Pyrex glass walls on the ortho- parahydrogen conversion calalyzed by silica gel-supported neodymia at 77 deg K and means of eliminating this effect were studied. The impurities were found to reduce rate constants by as much as a factor of four, and. trapping close to the catalyst surface near 77 deg K was found to minimize the effect. The impurities appear to have an appreciable vapor pressure at 195 deg K but none at 77 deg K; they are tentatively concluded to be CO/sub 2/ and H/sub 2/O, which are known to be evolved from Pyrex glass on heating. (D.L.C.)
- Research Organization:
- Univ. of Arizona, Tucson
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-14-021464
- OSTI ID:
- 4172968
- Journal Information:
- Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 8 Vol. 64; ISSN 0022-3654
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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