Decomposition of hydrogen iodide in the S-I thermochemical cycle over Ni catalyst systems

Annarita Spadoni, Michela Lanchi, Claudio Felici, Paolo Favuzza, Raffaele Liberatore, Pietro Tarquini, Alina Carmen Tito, Carlo Vittorio Mazzocchia

Research output: Contribution to conferencePaper


The Sulphur-Iodine thermochemical cycle for hydrogen production has been investigated by ENEA over the last five years, with a particular focus on chemical aspects. Regarding the hydrogen iodide decomposition, three y-alumina supported nickel catalysts were produced and characterized, and then tested in terms of catalytic activity and stability by means of a tubular quartz reactor. In particular the relationships between catalytic activity and preparation procedure was investigated. From the experimental data acquired it can be concluded that two of the three catalysts tested demonstrated high catalytic activity, since hydrogen iodide conversion was almost coincident with theoretical equilibrium value. On the other side, for all the catalysts, a gradual but considerable deactivation phenomenon was observed at 500°C, while at a temperature higher than 650°C the catalytic activity was recovered.
Original languageEnglish
Publication statusPublished - 2007
Event2007 AIChE Annual Meeting - , United States
Duration: 1 Jan 2007 → …


Conference2007 AIChE Annual Meeting
CountryUnited States
Period1/1/07 → …


All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Spadoni, A., Lanchi, M., Felici, C., Favuzza, P., Liberatore, R., Tarquini, P., ... Mazzocchia, C. V. (2007). Decomposition of hydrogen iodide in the S-I thermochemical cycle over Ni catalyst systems. Paper presented at 2007 AIChE Annual Meeting, United States.