|About this Abstract
||Materials Science & Technology 2012
||Materials Issues in Nuclear Waste Management in the 21st Century
||Removal of Xenon and Krypton from Air Using Metal Organic Frameworks
||Praveen Thallapally, Jian Liu, Denis M Strachan
|On-Site Speaker (Planned)
Separating low concentration xenon (Xe) and krypton (Kr) from air is an important step in removing radioactive 85Kr from spent nuclear fuel. The conventional method to separate these two gases is cryogenic distillation which is an energy-intensive process. Separation of Xe and Kr by selective adsorption near room temperature would be more energy efficient. Herein we discuss a novel class of materials called Metal Organic Frameworks (MOFs) because of their high surface area, large pore volume, and easily tunable compositions. MOFs are constructed by coordinate bonds between multi-dentate ligands and metal atoms or small metal-containing clusters (secondary building units). Our results indicate these materials adsorb large amounts of X at room temperature and separate Xe and Kr from air. This is our first experimental study on the low concentration Xe and Kr separation from air using MOFs, which are promising to be used in spent nuclear fuel treatments.