Hydrogen-deuterium equilibration and ortho-parahydrogen conversion on molecular sieves

Journal Article · Fri Sep 01 00:00:00 EDT 1967 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100869a012· OSTI ID:4231690

Turkevich, John ^[1]; Ciborowski, Stanislaw ^[1]

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1. Princeton Univ., NJ (United States)

Here an investigation has been made of the ortho-parahydrogen conversion and hydrogen-deuterium equilibration on a number of faujasite-type molecular sieves in order to deter-mine the nature of catalytic centers. For this purpose a simple method of preparing afaujasite material was developed to produce material that would supplement the available commercial product. The conversion of the sodium faujasite to the ammonium, hydrogen,and decationated faujasite was studied. A gas chromatographic analysis was developed for the various hydrogen species. A correlation previously found between extent of sodium replacement and catalytic activity for hydrogen-deuterium equilibration wasextended to the degree of conversion of hydrogen faujasite to decationated faujasite. The ortho-parahydrogen conversion was found to be independent of the degree of decationization and must be ascribed to small traces of paramagnetic impurities, or to the effect of the nuclear magnetic moment of aluminum. The effect of γ irradiation was also studied.

• Research Organization: Princeton Univ., NJ (United States)
• Sponsoring Organization: US Atomic Energy Commission (AEC)
• NSA Number: NSA-21-042933
• OSTI ID: 4231690
• Alternate ID(s): OSTI ID: 5105065
• Report Number(s): NYO--1158-15
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 10 Vol. 71; ISSN 0022-3654
• Publisher: American Chemical Society
• Country of Publication: United States
• Language: English

Related Subjects

ADSORPTION
DEUTERIUM
GAMMA RADIATION
HYDROGEN
ISOMERS
ISOTOPIC EXCHANGE
Inorganic
Organic & Physical Chemistry
Isotopic Effects
MOLECULES
RADIATION EFFECTS