Thermal analysis of SYNROC gel microspheres
Thermoanalytical methods were used to characterize SYNROC microspheres at three stages of the internal gelation process: unwashed spheres, washed spheres, and washed-and-dried spheres. Linear-programmed heating experiments were performed using thermogravimetric analysis, differential scanning calorimetry, differential thermal analysis, and mass spectrometry for producing the thermograms. The data were used to elucidate thermal reactions occurring between ambient and 800/sup 0/C. The principal reactions were the release of waters from various sources, the decomposition and combustion of gelation additives (hexamethylenetetramine and urea), and the decomposition of carbonates. Data also demonstrated the efficiency of the washing process. Kinetic studies were carried out by differential scanning calorimetry and differential thermal analysis to determine activation energies for certain pyrolysis reactions. 8 figures.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5827456
- Report Number(s):
- ORNL/TM-7930; ON: DE82003472; TRN: 82-004753
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SYNROC PROCESS
MICROSPHERES
ACTIVATION ENERGY
GELS
MASS SPECTROSCOPY
PYROLYSIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COLLOIDS
DECOMPOSITION
DISPERSIONS
ENERGY
GRAVIMETRIC ANALYSIS
MANAGEMENT
PROCESSING
QUANTITATIVE CHEMICAL ANALYSIS
RADIOACTIVE WASTE PROCESSING
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
052000* - Nuclear Fuels- Waste Management