Sorption of graphites at high temperatures. Progress report, February 1, 1976--January 31, 1977

Technical Report · Sat Jan 01 04:00:00 EST 1977

OSTI ID:7224684

Pyecha, T D; Zumwalt, L R

Preliminary to mixed isotherm studies, one additional cesium isotherm was obtained with a finned-rod H-451 graphite sample at 1100/sup 0/C. The results indicated that not only are long times required to reach saturation, but also there is a hysteresis effect at low vapor pressures and concentrations and that under these conditions sorption of cesium in graphite is not readily reversible. Several cesium isotherms (at 1000/sup 0/C) were obtained of H-451 graphite which had been pre-impregnated with selected concentrations of Sr-85-tagged strontium. The runs were of long duration to attain equilibrium. The data obtained showed a substantial effect of the presence (concentration) of strontium on cesium sorption. End-of-run cesium and strontium concentration profiles were obtained. As yet the data on the mixed-sorption behavior, relative to possible models, has not been analyzed in depth. As a preliminary to the mixed-sorption studies, strontium impregnation in the absence of cesium was studied and a few experiments on the effect of concentration on strontium diffusion were carried out with interesting results. Finally a few experiments on sample characterization and on the microdistribution of cesium and strontium were conducted. It was found difficult to obtain distributions at the concentration levels characteristic of our experiments.

• Research Organization: North Carolina State Univ., Raleigh (USA)
• OSTI ID: 7224684
• Report Number(s): ORO-4682-3
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
ADSORPTION ISOTHERMS
ALKALI METALS
ALKALINE EARTH METALS
CARBON
CESIUM
DIFFUSION
ELEMENTS
EQUILIBRIUM
FISSION PRODUCTS
FLUID FLOW
GAS FLOW
GRAPHITE
HYSTERESIS
ISOTOPE APPLICATIONS
ISOTOPES
KINETICS
KNUDSEN FLOW
MATHEMATICAL MODELS
METALS
NONMETALS
PHYSICAL PROPERTIES
RADIOACTIVE MATERIALS
SORPTION
SORPTIVE PROPERTIES
STRONTIUM
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRACER TECHNIQUES
VAPOR PRESSURE
VERY HIGH TEMPERATURE