Effects of heating on salt-occluded zeolite

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The electrometallurgical treatment of spent nuclear fuel generates a waste stream of fission products in the electrolyte, LiCl-KCl eutectic salt. Argonne National Laboratory is developing a mineral waste form for this waste stream. The waste form consists of a composite formed by hot pressing salt-occluded zeolite and a glass binder. Pressing conditions must be judiciously chosen. For a given pressure, increasing temperatures and hold times give denser products but the zeolite is frequently converted to sodalite. Reducing the temperature or hold time leads to a porous zeolite composite. Therefore, conditions that affect the thermal stability of salt-occluded zeolite both with ... continued below

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10 p.

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Lewis, M.A.; Hash, M.C.; Pereira, C. & Ackerman, J.P. May 1, 1996.

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The electrometallurgical treatment of spent nuclear fuel generates a waste stream of fission products in the electrolyte, LiCl-KCl eutectic salt. Argonne National Laboratory is developing a mineral waste form for this waste stream. The waste form consists of a composite formed by hot pressing salt-occluded zeolite and a glass binder. Pressing conditions must be judiciously chosen. For a given pressure, increasing temperatures and hold times give denser products but the zeolite is frequently converted to sodalite. Reducing the temperature or hold time leads to a porous zeolite composite. Therefore, conditions that affect the thermal stability of salt-occluded zeolite both with and without glass are being investigated in an ongoing study. The parameters varied in this stage of the work were heating time, temperature, salt loading, and glass content. The heat-treated samples were examined primarily by X-ray diffraction. Large variations were found in the rate at which salt-occluded zeolite converted to other phases such as nepheline, salt, and sodalite. The products depended on the initial salt loading. Heating times required for these transitions depended on the procedure and temperature used to prepare the salt-occluded zeolite. Mixtures of glass and zeolite reacted much faster than the pure salt-occluded zeolite and were almost always converted to sodalite.

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10 p.

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INIS; OSTI as DE96010798

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  • 98. annual meeting of the American Ceramic Society, Indianapolis, IN (United States), 14-17 Apr 1996

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  • Other: DE96010798
  • Report No.: ANL/CMT/CP--88170
  • Report No.: CONF-9604124--2
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 230632
  • Archival Resource Key: ark:/67531/metadc669259

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  • May 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Dec. 16, 2015, 12:23 p.m.

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Lewis, M.A.; Hash, M.C.; Pereira, C. & Ackerman, J.P. Effects of heating on salt-occluded zeolite, article, May 1, 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc669259/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.