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Effect of Various Electrolyte Compositions on the NiO Degradation in Molten Carbonates

[+] Author Affiliations
Silvera Scaccia, Stefano Frangini

ENEA, Rome, Italy

Paper No. FUELCELL2005-74045, pp. 347-350; 4 pages
doi:10.1115/FUELCELL2005-74045
From:
  • ASME 2005 3rd International Conference on Fuel Cell Science, Engineering and Technology
  • 3rd International Conference on Fuel Cell Science, Engineering and Technology
  • Ypsilanti, Michigan, USA, May 23–25, 2005
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-3764-5 | eISBN: 0-7918-3757-2
  • Copyright © 2005 by ASME

abstract

In the present paper we report the NiO solubility in a variety of alkali carbonate compositions in presence of MgO, CaCO3 , BaCO3 and La2 O3 additions under different conditions of gas composition and temperature. Two types of binary eutectic melts were chosen, namely the standard electrolyte (62–38) (Li-K)2 CO3 and (52–48) % (Li-Na)2 CO3 mixtures. The ternary eutectic melt chosen was (43.5-31.5-25.0) mol % (Li-Na-K)2 CO3 . The observed reduction of NiO solubility induced by the additives can be explained in terms of a higher basic character of all the modified electrolytes, although the NiO dissolution still follows an acidic dissolution mechanism in all the conditions under study.

Copyright © 2005 by ASME
Topics: Electrolytes

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