Thermal Stability of Silicalite and Zeolite Molecular Sieves Exposed to CO2 with SO2 & H2O Impurities
EMSL Project ID
37990
Abstract
Access to simultaneous differential scanning calorimetry/thermal gravimetric analysis (DSC/TGA), X-ray diffraction (XRD) and, if available, X-ray fluorescence (XRF) equipment at EMSL is requested for analysis of 15 samples. Zeolite and silicalite molecular sieve samples will be characterized by these methods, the objective being to study any changes in thermal stability that may have occurred after their exposure to a high pressure mixture of CO2, SO2 and H2O. The thermal behavior of zeolites and silicalite would be expected to change should such an exposure result in framework attack, manifesting itself by decreases in phase transition temperatures. This phenomenon has been observed in faujasite-type zeolite X. This research has ramifications for the application of these molecular sieve phases for the removal of H2O and SO2 impurities from high pressure CO2 during the carbon capture process. EMSL possesses a high temperature simultaneous DSC/TGA instrument that can be operated at temperatures up to 1200C, ideal for the study of high temperature phase transitions in zeolite and silicalite molecular sieves. Recovered products will be analyzed by XRD. If available, use of XRF equipment is sought for analysis of the sodium content of the silicalite lattices. This has been linked to the presence of defects in as-synthesized materials.
Project Details
Project type
Exploratory Research
Start Date
2010-01-11
End Date
2011-01-16
Status
Closed
Released Data Link
Team
Principal Investigator