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TitleNew materials technologies for hydrogen generation
Publication TypeJournal Article
Year of Publication2007
AuthorsBrown, I.W.M., Bowden M.E., and Lendrum C.
JournalMaterials at High Temperatures
Pagination217 - 223
Date Published2007
ISSN09603409 (ISSN)
Keywordsbiomass, Carbon monoxide, Chemical reactors, Degree of reduction, Fixed bed reactor, Fluidised bed, Fluidization, Fluidized beds, Hydrogen generations, Hydrogen production, Iron sand, Lignite, New material, new zealand, Oxide reduction, REDOX cycles, Redox reactions, Synthesis gas, Temperature range, Thermochemical cycles, Water splitting
AbstractA thermochemical cycle is described that demonstrates the use of biomass or lignite-derived synthesis gas to reduce New Zealand ironsand, which is subsequently steam-oxidised to generate pure hydrogen. The redox reactions for this cycle have been thermodynamically modelled, giving an indication of the temperature ranges required to achieve water splitting and the potential sensitivity of the process to partial pressures of CO2. A fixed bed reactor showed reproducible oxide reduction behaviour over 10 redox cycles but only achieved limited conversion to 64% residual Fe3O4 (18%Fe). Fluidised bed reactor studies carried over a comparable timeframe using CO/N2 mixtures demonstrated a high degree of reduction to 76%Fe. © 2007 Science Reviews 2000 Ltd.

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