Published 1990 | Version v1
Journal article Metadata-only

H/D isotopic exchange between hydrogen and water vapour on Ni/Cr2O3/ThO2 catalysts

Creators

  • 1. Atomic Energy Establishment, Cairo (Egypt). Nuclear Chemistry Dept.
  • 2. Ain Shams Univ., Cairo (Egypt). Dept. of Chemistry
  • 3. Atomic Energy Establishment, Cairo (Egypt). Hot Lab. Centre

Description

Thoriumdioxide was selected as a second promoter for nickel catalyst in addition to chromium oxide which was proved to be suitable to accelerate the H/D isotopic exchange reaction between hydrogen and water vapour. A series of Ni/Cr2O3/ThO2 catalysts were prepared by the co-precipitation technique. The amount of Ni was 70 to 90 mol%, while that of Cr2O3 was 0 to 20 mol% and that of ThO2 ranges from 0 to 30 mol%. This type of catalysts is sensitive for water condensation on its surface. The total surface area, total pore volume and pore radius of the catalysts were calculated from nitrogen adsorption on their surfaces at 77 K and application of the BET-equation. (orig.)

Abstract (German)

Thoriumdioxid wurde als zweiter Aktivator fuer einen Nickelkatalysator als Zusatz zum Chromoxid ausgewaehlt und auf die Eignung zur Beschleunigung der H/D-Austauschreaktion zwischen Wasserstoff und Wasserdampf geprueft. Eine Reihe von Ni/Cr2O3/ThO2 Katalysatoren wurden durch die Mitfaellungstechnik hergestellt. Die Nickelmenge betrug zwischen 70 bis 90 mol%, waehrend die Cr2O3-Menge zwischen 0 bis 20 mol% und die der ThO2-Menge zwischen 0 bis 30 mol% lag. Diese Katalysatortypen sind gegenueber Wasserkondensation an ihren Oberflaechen empfindlich. Die Gesamtoberflaeche, das Gesamtporenvolumen und die Porenradien der Katalysatoren wurden mit Hilfe der BET-Methode ermittelt. (orig.)

Additional details

Publishing Information

Journal Title
Isotopenpraxis
Journal Volume
26
Journal Issue
11
Series
Isotopenpraxis.
Journal Page Range
529-531
ISSN
0021-1915
CODEN
IPRXA

Conference

Title
5. work meeting 'Isotopes in nature'.
Dates
25-29 Sep 1989.
Place
Leipzig (German Democratic Republic).

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
22036691
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CATALYSTS; CHROMIUM OXIDES; COPRECIPITATION; DEUTERIUM; HYDROGEN; ISOTOPIC EXCHANGE; NICKEL; POROSITY; QUANTITY RATIO; SURFACES; THORIUM OXIDES; WATER VAPOR
Descriptors DEC
ACTINIDE COMPOUNDS; CHALCOGENIDES; CHROMIUM COMPOUNDS; ELEMENTS; FLUIDS; GASES; HYDROGEN ISOTOPES; ISOTOPES; LIGHT NUCLEI; METALS; NONMETALS; NUCLEI; ODD-ODD NUCLEI; OXIDES; OXYGEN COMPOUNDS; PRECIPITATION; SEPARATION PROCESSES; STABLE ISOTOPES; THORIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; VAPORS