Aqueous precipitation: Population balance modeling and control in multi-cation systems

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Efficient separation of metal species from aqueous streams by precipitation techniques requires a fundamental understanding of the processes that occur during precipitation. These processes include particle nucleation, particle growth by solute deposition, agglomerate formation, and agglomerate breakup. Population balance method has been used to develop a kinetic model that accounts for these competing kinetic processes. The usefulness of the model is illustrated through its application to precipitation of yttrium hydroxynitrate, YHN. Kinetic parameters calculated from the model equations and system-specific solution chemistry are used to describe several aspects of the effect of pH on YHN precipitation. Implications for simultaneous precipitation ... continued below

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20 p.

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Voigt, J. A. March 1996.

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  • Voigt, J. A. Sandia National Labs., Albuquerque, NM (United States)

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico
  • Ames Laboratory
    Publisher Info: Ames Lab., IA (United States)
    Place of Publication: Iowa

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Description

Efficient separation of metal species from aqueous streams by precipitation techniques requires a fundamental understanding of the processes that occur during precipitation. These processes include particle nucleation, particle growth by solute deposition, agglomerate formation, and agglomerate breakup. Population balance method has been used to develop a kinetic model that accounts for these competing kinetic processes. The usefulness of the model is illustrated through its application to precipitation of yttrium hydroxynitrate, YHN. Kinetic parameters calculated from the model equations and system-specific solution chemistry are used to describe several aspects of the effect of pH on YHN precipitation. Implications for simultaneous precipitation of more than one cation type are discussed with examples. Effects of solution chemistry, precipitator design, and solvent choice are considered.

Physical Description

20 p.

Notes

OSTI as DE96008251

Source

  • Engineering Foundation conference on emerging separation technologies, Kona, HI (United States), 16-21 Jun 1996

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  • Other: DE96008251
  • Report No.: SAND--96-0746C
  • Report No.: CONF-960631--1
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 236058
  • Archival Resource Key: ark:/67531/metadc669441

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • March 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • April 14, 2016, 9:25 p.m.

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Voigt, J. A. Aqueous precipitation: Population balance modeling and control in multi-cation systems, article, March 1996; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc669441/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.