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2000 Fiscal Year Final Research Report Summary

Research and Development on C-14 Isotope Separation.

Research Project

Project/Area Number 10558078
Research Category

Grant-in-Aid for Scientific Research (B).

Allocation TypeSingle-year Grants
Section展開研究
Research Field Nuclear engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

FUJII Yasuhiko  Reserch Laboratory for Nuclear Reactors, Professor., 原子炉工学研究所, 教授 (20016869)

Co-Investigator(Kenkyū-buntansha) SUZUKI Tatsuya  Reserch Laboratory for Nuclear Reactors, Research Associate., 原子炉工学研究所, 助手 (70323839)
NOMURA Masao  Reserch Laboratory for Nuclear Reactors, Research Associate., 原子炉工学研究所, 助手 (60100997)
Project Period (FY) 1998 – 2000
KeywordsCarbon Isotope Separation / Carbon Isotope Effect / Carbon Monoxide / Carbon Oxide / Carbamate / molecular orbital theory
Research Abstract

The present work deals with the carbon isotope separation to reduce C-14 contaminated waste generated at the decommissioning of the graphite type reactors. Since the simplest treatment of the graphite is burning, CO and CO_2 were selected as the working materials for the separation. The research activities are divided into following three sub-topics.
(1) Theoretical study on carbon isotope effects by molecular orbital theory
The most appropriate molecular structures and molecular vibrations of CO complexes with Cu (I) and Ag (I) ions and CO_2 complexes with 30 amines were determined by using the computational chemistry program of Gaussian 98 7A.By using computed vibrational frequencies, the reduced partition function ratios of the isotopic molecules were calculated and thus the separation factors (α) of CO and CO_2 complexes were calculated.
(2) Experimental study on carbon isotope effects of CO complexes
CO is known to form complexes with Ag (I) and Cu (I) ions. In the present work the isotope separation coefficients of CO complexes with Ag (I) in non aqueous solvents and Cu (I) ions in aqueous solutions and amine methanol solutions were determined for the stable isotope pair of ^<12>C and ^<13>C at different temperatures. The maximum value of α observed was 1.03 at-43℃. The results suggest that one can expect the value α=1.06 for the isotope pair ^<12>C and ^<14>C.
(3) Study on ion exchange multi-stage enrichment
As a basic study on the multi-stage isotope enrichment of CO_2 complex systems, chromatographic experiments of Cu (I) and Fe (III) chloride complex were performed using column packed with anion exchange resin. In these experiments, the isotope separations of copper and iron were successfully observed at the boundaries of Cu (I) and Fe(III) ion adsorption bands.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Jinzhou DU, et al.: "Carbon Isotope Effects in Cu(I)-CO Complex Systems"Phys.Chem.Chem.Phys.. Vol.2_*. 3181-3185 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Md.Abdul MATIN, et al.: "Temperature effect on copper isotopes separation by electron-exchange reaction using anion-exchange chromatography"Sep.Sci.Technol.. Vol.35,No.5. 703-713 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ibrahim M.ISMAIL, et al.: "Anomaly of ^<155> Gd and ^<157> Gd Isotope Effects in Ligand Exchange Reactions Observed by Ion Exchange Chromatography"Anal.Chem. Vol.72,No.13. 2841-2845 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sang-Ho KIM, et al.: "Iron Isotope Effects Studied by Means of Anion Exchange Redox Chromatography"J.Ion Exchange. Vol.11,No.2. 26-31 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kenji TAKESHITA et al.: "Recovery Process of l4C from Irradiated Graphite"Canadian J.Chem.Eng.. (in Press). (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Jinzhou DU, Ken OKADA, Masao NOMURA, Yasuhiko FUJII: "Carbon Isotope Effects in Cu (I)-CO Complex Systems."Phys. Chem. Chem. Phys.. Vol. 2. 3181-3185 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Md. Abdul MATIN, Sang-Ho KIM, Masao NOMURA, Yasuhiko FUJII: "Temperature effect on copper isotopes separation by electron-exchange reaction using anion-exchange chromatography"Sep. Sci. Technol.. Vol. 35. 703-713 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ibrahim M.ISMAIL, Akira FUKAMI, Masao NOMURA, Yasuhiko FUJII: "Anomaly of ^<155>Gd and ^<157>Gd isotope Effects in Ligand Exchange Reactions Observed by Ion Exchange Chromatography"Anal. Chem.. Vol. 72. 2841-2845 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sang-Ho KIM, Masao AIDA, Masao NOMURA, Rifaid M.NUR, Yasuhiko FUJII: "Iron Isotope Effects Studied by Means of Anion Exchange Redox Chromatography"J.Ion Exchange. Vol. 11. 26-31 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kenji TAKESHITA, Yoshio NAKANO, Masami SHIMIZU, Yasuhiko FUJII: "Recovery Process of 14C from Irradiated Graphite"Canadian J.Chem. Eng.. (in Press).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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