Thermal Analysis of Waste Glass Batches: Effect of Batch Makeup on Gas-Evolving Reactions

Book · Mon Jan 21 00:00:00 EST 2013

OSTI ID:1092659

Pierce, David A.; Hrma, Pavel R.; Marcial, Jose

Batches made with a variety of precursors were subjected to thermo-gravimetric analysis. The baseline modifications included all-nitrate batch with sucrose addition, all-carbonate batch, and batches with different sources of alumina. All batches were formulated for a single glass composition (a vitrified simulated high-alumina high-level waste). Batch samples were heated from the ambient temperature to 1200°C at constant heating rates ranging from 1 K/min to 50 K/min. Major gas evolving reactions began at temperatures just above 100°C and were virtually complete by 650°C. Activation energies for major reactions were obtained with the Kissinger’s method. A rough model for the overall kinetics of the batch-conversion was developed to be eventually applied to a mathematical model of the cold cap.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1092659
• Report Number(s): PNNL-SA-78036; EY4049110
• Resource Relation: Related Information: Thermal Analysis of Micro, Nano- and Non-Crystalline Materials: Transformation, Crystallization, Kinetics and Thermodynamics. Hot Topics in Thermal Analysis and Calorimetry, 9:429-440
• Country of Publication: United States
• Language: English