Slow and fast dynamics of a natural gas hydrogen reformer

M. Skataric, Z. Gajic

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


It has been known for some time that fuel cells operate in multiple time scales due to phenomena of different nature that govern their dynamics (electrical, chemical, mechanical, electrochemical, thermodynamic). It is expected that multi-time scales will be presented in the hydrogen gas reformer (produces hydrogen from hydrogen rich fuels) due to its complex chemical and physical nature. In this paper, we show how to present a linearized hydrogen gas reformer dynamic model in the coordinates in which slow and fast variables are explicitly defined and exactly separated. This result is important in its own right to get a better understanding of slow and fast dynamics of particular variables, study their interactions, and as well for designing reduced-order controllers and estimators for the hydrogen gas reformer that will independently operate in different time scales.

Original languageEnglish (US)
Pages (from-to)15173-15179
Number of pages7
JournalInternational Journal of Hydrogen Energy
Issue number35
StatePublished - Nov 22 2013

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


  • Controller design
  • Hydrogen reformer
  • Multiple time-scales
  • Observer design
  • Slow and fast phenomena

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