Microprobe analysis of noble gas encapsulates in zeolites |
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| Affiliation: | 1. State Key Laboratory of Petroleum Resources and Engineering in China University of Petroleum at Beijing, Beijing 102249, China;2. MOE Key Laboratory of Petroleum Engineering, China University of Petroleum (Beijing), Beijing 102249, China;1. Department of Mechanical Engineering, National Central University, Jhongli City, Taoyuan County, 32001, Taiwan, ROC;2. Graduate Institute of Energy Engineering, National Central University, Jhongli City, Taoyuan County, 32001 Taiwan, ROC;1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Beijing Key Laboratory of Energy Conservation and Emission Reduction of Metallurgical Industry, University of Science and Technology Beijing, Beijing 100083, China;1. College of Pharmacy, Sahmyook University, Seoul, Republic of Korea;2. College of Pharmacy, Ajou University, Suwon, Republic of Korea;3. Department of Pharmaceutics & Drug Delivery, University of Mississippi, University, MS, USA;4. Pii Center for Pharmaceutical Technology, School of Pharmacy, University of Mississippi, University, MS, USA |
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| Abstract: | Electron microprobe analysis has been employed for the first time to investigate gases immobilized in zeolites. Two trapping procedures and two different molecular sieves were tested: on one hand Kr as well as one to one and mixtures were trapped hydrothermally in X-ray amorphous zeolite 5A, and on the other, Kr was immobilized in mordenites by a combination of physical sorption and chemical modification procedure. The results show that the noble gases Ar, Kr and Xe can be quickly and specifically identified in these inorganic matrices. Because in all samples the density of the noble gas follows exactly the density of the aluminosilicate framework it is concluded that the noble gas is homogeneously distributed in the zeolite material. Analysis of noble gas mixtures indicates that each of the noble gases Ar, Kr and Xe can be specifically monitored in the presence of the two others. In addition, an analysis of other elements present in the pellet can be simultaneously carried out. The variation of the concentration of these elements with structure can be followed with resolution of ≈ 1μm. |
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