IE-911 low-temperature thermal stability
EMSL Project ID
2081
Abstract
An inorganic ion exchanger based on crystalline silicotitanate (CST), IE-911, is currently being considered for Cs separation at the Savannah River Site. While the performance of this ion exchanger has been well characterized under normal operating conditions, the stability of the material at slightly elevated temperatures, such as those that may occur in a process upset, is the subject of current evaluations. A 3-step test was designed to evaluate the IE-911 Cs sorption capacity after low temperature (< 80ºC) treatment. These experiments are designed to simulate conditions that may occur if loss of flow or cooling occurred during Cs separation operations. First, Cs from the simulant is loaded on Na-IE-911 at room temperature. Second, batches of Na-IE-911 and waste simulant are held at ambient, 55oC, and 80oC, for different duration. Third, higher temperature batches are cooled to ambient to reload any Cs that was desorbed. The Cs concentration in solution samples is to be measured using atomic absorption spectroscopy (AA). Solution concentrations of Al, Si, Ti, PM1, and PM2 are to be determined using inductively-coupled-plasma emission spectroscopy (ICP-ES). Select samples of Na-IE-911are to be analyzed using x-ray Diffraction (XRD) and scanning electron microscopy (SEM).
Project Details
Project type
Exploratory Research
Start Date
2000-10-04
End Date
2001-06-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members