Mechanistic study of the isotopic-exchange reaction between gaseous hydrogen and palladium hydride powder

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(91)90109-H· OSTI ID:5641302

Outka, D A; Foltz, G W ^[1]

---

1. Sandia National Labs., Livermore, CA (USA)

A detailed mechanism for the isotopic-exchange reaction between gaseous hydrogen and solid palladium hydride is developed which extends previous model for this reaction by specifically including surface reactions. The modeling indicates that there are two surface-related processes that contribute to the overall rate of exchange: the desorption of hydrogen from the surface and the exchange between surface hydrogen and bulk hydrogen. This conclusion is based upon measurements examining the effect of small concentrations of carbon monoxide were helpful in elucidating the mechanism. Carbon monoxide reversibly inhibits certain steps in the exchange; this slows the overall rate of exchange and changes the distribution of products from the reactor.

• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5641302
• Journal Information: Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 130:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080100 -- Hydrogen-- Production
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COMPUTERIZED SIMULATION
DEHYDROGENATION
DESORPTION
ELEMENTS
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGENATION
ISOTOPIC EXCHANGE
KINETICS
LASER SPECTROSCOPY
MATHEMATICAL MODELS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM COMPOUNDS
PALLADIUM HYDRIDES
PURIFICATION
RAMAN SPECTROSCOPY
REACTION KINETICS
SIMULATION
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS