Isotopic water separation using AGMD and VEMD

• Autorzy: Kim J. , Park S. , Kim T.-S. , Jeong D.-Y. , Ko K.-H.
• Języki publikacji: EN

Abstrakty

EN

The 18O isotopic water permeation and separation characteristics of a hydrophobic PTFE membrane using Air Gap Membrane Distillation (AGMD) and Vacuum Enhanced Membrane Distillation (VEMD) were investigated. Permeation fluxes were measured by weighing the collected membrane-permeated water vapor. 18O/16O of each water sample was analyzed by the Tunable Diode Laser Absorption Spectroscopy (TDLAS). We observed the effects of the air filled membrane pores and the temperature gradient applied to the membrane surfaces on the vapor permeation flux and the oxygen isotope separation for the first time. For both AGMD and VEMD, the permeation flux and the degree of 18O separation increased as the membrane interfacial temperature gradient increased. Even though, oxygen isotope separation and the permeation flux for VEMD is slightly higher than AGMD, the latter may be more efficient from the system's operational point of view.

Słowa kluczowe

EN

AGMD; VEMD; oxygen isotopes; PET; FDG

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2004
• Tom: Vol. 49, nr 4
• Strony: 137--142
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Kim J.

• Laboratorium for Quantum Optics, Korea Atomic Energy Research Institute, Dukjin-Dong 150, Yusung-Gu, Daejeon, Korea 305-353, Tel.: [phone], Fax: [phone]

autor

Park S.

• Division of Metrology, Korea Research Institute of Standards and Science, Doryong-Dong 1, Yusung-Gu, Daejeon, Korea 305-340

autor

Kim T.-S.

• Laboratorium for Quantum Optics, Korea Atomic Energy Research Institute, Dukjin-Dong 150, Yusung-Gu, Daejeon, Korea 305-353, Tel.: [phone], Fax: [phone]

autor

Jeong D.-Y.

• Laboratorium for Quantum Optics, Korea Atomic Energy Research Institute, Dukjin-Dong 150, Yusung-Gu, Daejeon, Korea 305-353, Tel.: [phone], Fax: [phone]

autor

Ko K.-H.

• Laboratorium for Quantum Optics, Korea Atomic Energy Research Institute, Dukjin-Dong 150, Yusung-Gu, Daejeon, Korea 305-353, Tel.: [phone], Fax: [phone]

Bibliografia

• 1. Chmielewski AG, Zakrzewska-Trznadel G, Miljević NR, Van Hook WA (1991) Investigation of the separation factor between light and heavy water in the liquid/vapor membranę permeation process. J Membr Sci 55:257−262
• 2. Chmielewski AG, Zakrzewska-Trznadel G, Miljević NR, Van Hook WA (1991) 16O/18O and H/D separation of water through an hydrophobic membrane. J Membr Sci 60:319−329
• 3. Chmielewski AG, Zakrzewska-Trznadel G, Miljević NR, Van Hook WA (1995) Membrane distillation employed for separation of water isotopic compounds. Sep Sci Technol 30;7/9:1653−1667
• 4. Chmielewski AG, Zakrzewska-Trznadel G, Miljević NR, Van ook WA (1997) Multistage process of deuterium and heavy oxygen enrichment by membrane distillation. Sep Sci Technol 32;1/4:527−539
• 5. Kerstel ERTh, Gagliardi G, Gianfrani L, Meijer HAJ, van Trigt R, Ramaker R (2002) Determination of the 2 H/1H, 17O/16O, and 18O/16O isotope ratios in water by means of tunable diode laser spectroscopy at 1.39 µm. Spectrochim Acta A 58:2389−2396
• 6. Kim J, Park SE, Kim TS, Jeong DY, Ko KH, Park KB (2003) Separation characteristics of oxygen isotopes with hydrophobic PTFE membranes. Membrane Journal 13:3;154−161 (in Korean)
• 7. Krell E (1963) Handbook of laboratory distillation. Elsevier Publishing Co., London
• 8. Park SE, Jeong DY, Kim J, Ko KH, Jung EC, Kim CJ (2003) Measurement of oxygen isotope ratios using tunable diode laser absorption spectroscopy. In: Proc of the CLEO/Pacific Rim 2003. The 5th Pacific Rim Conf on Lasers and Electron Optics, December 15−19, 2003, Taipei, Taiwan 1:241
• 9. Van Hook WA, Chmielewski AG, Zakrzewska-Trznadel G, Miljević NR (1991) Method of enrichment of oxygen-18 in natural water. U S Patent 5,057,225, October 15, 1991