Published September 1992 | Version v1
Journal article Metadata-only

Redox reactions of platinum elements. VI. Catalysis by Ru ions of the reaction between hydrazine and HNO3

Creators

Description

Hydrazine is widely used in extractive reprocessing of irradiated nuclear fuel as a reductant and as a reagent that rapidly removes HNO2 from HNO3 solution and stabilizes U(IV), Fe (II), and Ru(III). The rate of hydrazine oxidation by HNO3 in the presence of Ru ions obeys the law -d[N2H5+]/dt = k[N2H5+][H+][Ru], where k = (0.831 ± 0.052) liter2 (mole2·min) at 70 degrees C and ionic strength μ = 3. The activation energy of the reaction is E = (81.9 ± 1.7) kJ/mole. The entropy of activation δS = -(62 ± 5) J/(mole·K). The catalysis mechanism includes a slow step of Ru(III) reduction to Ru(II) by hydrazine and a fast oxidation of Ru(II) to Ru(III) by HNO3

Additional details

Publishing Information

Journal Title
Radiochemistry (New York)
Journal Volume
34
Journal Issue
1
Journal Page Range
p. 112-116.
ISSN
1066-3622
CODEN
RDIOEO

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
25013870
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS;
Resource subtype / Literary indicator
Translation
Descriptors DEI
ACTIVATION ENERGY; CATALYSIS; CATALYTIC EFFECTS; CATIONS; ENTROPY; HOMOGENEOUS CATALYSIS; HYDRAZINE; NITRIC OXIDE; OXIDATION; REDOX REACTIONS; REDUCTION; RUTHENIUM
Descriptors DEC
CHALCOGENIDES; CHARGED PARTICLES; CHEMICAL REACTIONS; ELEMENTS; ENERGY; IONS; METALS; NITROGEN COMPOUNDS; NITROGEN OXIDES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PLATINUM METALS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENTS

Optional Information

Notes
Translated from Radiokhimiya; 34: No. 1, 140-147(Jan-Feb 1992).