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KMID : 0357520060290030147
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Journal of Radiological Science and Technology
2006 Volume.29 No. 3 p.147 ~ p.155
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A Study on Gas Storage Medium by Using X-ray Diffraction
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Park Jong-Sam
Lee Joon-Il
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Abstract
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The crystal structures of fully dehydrated have been studied by single-crystal x-ray diffraction methods in the cubic space group. Pm3m in order to understand the structure of the zeolite as a gas storage medium and the mechanisms based on the encapsulation and decapsulation processes of gas molecules. In the crystal structures of dehydrated , three ions per unit cell are located on the 8-oxygen ring(0.0, 0.4531, 0.4531) and eight ions per unit cell are located near the centers of 6-oxygen rings. Each ions on the 8-ring is and away from two kinds of framework oxygen atoms. These values are more realistic than previously known values in . The exact positions of ions are ca. away from the centers of the 8-rings which are previously reported as the preferred location of ions. Because the zeolites frameworks are stabilized as the results, more effective controls of gas molecules at encapsulation, decapsulation, and storage are achieved. Additionally, the available storage volumes are also maximized and more volume of gases can be stored in the materials. Therefore, oxygen storage bottles in hospital can be minimized and portable oxygen bottles for patients in emergency can be developed by using the materials.
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KEYWORD
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Zeolite, Crystal structures, X-ray diffraction, Encapsulation, Decapsulation
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