Chapter 18. Details of Urea Decomposition in the Presence of Transition Metal Ions

  1. Waltraud M. Kriven and
  2. Hua-Tay Lin
  1. Bora Mavis Akinc

Published Online: 27 MAR 2008

DOI: 10.1002/9780470294802.ch18

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3

How to Cite

Akinc, B. M. (2003) Details of Urea Decomposition in the Presence of Transition Metal Ions, in 27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3 (eds W. M. Kriven and H.-T. Lin), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294802.ch18

Author Information

  1. Iowa State University Materials Science and Engineering Department 3053 Gilman Hall Ames, Iowa, 50011

Publication History

  1. Published Online: 27 MAR 2008
  2. Published Print: 1 JAN 2003

ISBN Information

Print ISBN: 9780470375839

Online ISBN: 9780470294802

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Keywords:

  • urea decomposition;
  • metal ions;
  • nickel hydroxide;
  • crystallites;
  • nitrogen

Summary

Literature on kinetics of urea decomposition in aqueous solutions was reviewed for 333-373 K range. After identifying possible reactions in the targeted pH range, kinetic simulations were performed. Significant accumulation of the cyanate intermediate was observed in the pH-digestion time-temperature range that was studied. Effects of hydrolysis of metal ions and complexes forming between cations and the decomposition products were considered by incorporation of the pertinent equilibria into the simulations. Predictions on the rate of retrieval of cations from the solutions were compared against the experimental data from chemical analyses and UV/VIS.