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Heterogeneous catalysis in fluoride melts - reduction of uranium(V) by hydrogen

Abstract

A necessary step in fuel reprocessing for the Molten-Salt Breeder Reactor is the reduction of pentavalent uranium to tetravalent uranium by hydrogen gas. The pentavalent uranium is dissolved in a mixed fluoride melt. Results are presented which show that the hydrogen reduction is rate limited, possibly due to the dissociation of hydrogen molecules to yield active hydrogen atoms; and that by the application of platinum catalysts a 10- to 100-fold increase in the reaction rate can be achieved.
Authors:
Kelmers, A D; Bennett, M R [1] 
  1. Oak Ridge National Lab., Tenn. (USA)
Publication Date:
Jan 01, 1976
Product Type:
Journal Article
Reference Number:
AIX-07-243951; ERA-02-007740; EDB-77-003234
Resource Relation:
Journal Name: Inorg. Nucl. Chem. Lett.; (United Kingdom); Journal Volume: 12:4
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; URANIUM; REDUCTION; BREEDER REACTORS; CATALYSIS; CATALYSTS; CHEMICAL REACTION KINETICS; FLUORIDES; HYDROGEN; MOLTEN SALT FUELS; MOLTEN SALT REACTORS; PLATINUM; REPROCESSING; SOLUTIONS; SPENT FUELS; URANIUM FLUORIDES; ACTINIDE COMPOUNDS; ACTINIDES; CHEMICAL REACTIONS; CRYOGENIC FLUIDS; DISPERSIONS; ELEMENTS; ENERGY SOURCES; FLUIDS; FLUORINE COMPOUNDS; FUELS; HALIDES; HALOGEN COMPOUNDS; KINETICS; LIQUID FUELS; METALS; MIXTURES; NONMETALS; NUCLEAR FUELS; PLATINUM METALS; REACTION KINETICS; REACTOR MATERIALS; REACTORS; SEPARATION PROCESSES; TRANSITION ELEMENTS; URANIUM COMPOUNDS; 400702* - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials; 050800 - Nuclear Fuels- Spent Fuels Reprocessing
OSTI ID:
7349378
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: INUCA
Submitting Site:
INIS
Size:
Pages: 333-337
Announcement Date:

Citation Formats

Kelmers, A D, and Bennett, M R. Heterogeneous catalysis in fluoride melts - reduction of uranium(V) by hydrogen. United Kingdom: N. p., 1976. Web. doi:10.1016/0020-1650(76)90004-0.
Kelmers, A D, & Bennett, M R. Heterogeneous catalysis in fluoride melts - reduction of uranium(V) by hydrogen. United Kingdom. doi:10.1016/0020-1650(76)90004-0.
Kelmers, A D, and Bennett, M R. 1976. "Heterogeneous catalysis in fluoride melts - reduction of uranium(V) by hydrogen." United Kingdom. doi:10.1016/0020-1650(76)90004-0. https://www.osti.gov/servlets/purl/10.1016/0020-1650(76)90004-0.
@misc{etde_7349378,
title = {Heterogeneous catalysis in fluoride melts - reduction of uranium(V) by hydrogen}
author = {Kelmers, A D, and Bennett, M R}
abstractNote = {A necessary step in fuel reprocessing for the Molten-Salt Breeder Reactor is the reduction of pentavalent uranium to tetravalent uranium by hydrogen gas. The pentavalent uranium is dissolved in a mixed fluoride melt. Results are presented which show that the hydrogen reduction is rate limited, possibly due to the dissociation of hydrogen molecules to yield active hydrogen atoms; and that by the application of platinum catalysts a 10- to 100-fold increase in the reaction rate can be achieved.}
doi = {10.1016/0020-1650(76)90004-0}
journal = {Inorg. Nucl. Chem. Lett.; (United Kingdom)}
volume = {12:4}
journal type = {AC}
place = {United Kingdom}
year = {1976}
month = {Jan}
}