Hydrogen production from pyrolysis oil using the steam-iron process: a process design study

M. Bleeker, S. Gorter, S. Kersten, L.G.J. Ham, van der, H. Berg, van den, H.J. Veringa

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24 Citations (Scopus)
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The overall energy efficiency of the production of pure hydrogen using the pyrolysis oil driven steam-iron process is evaluated for different process conditions. The process consists of a two-step process (reduction with pyrolysis oil, oxidation with steam) from which pure hydrogen can be obtained, without purification steps. An optimum energy efficiency of 53% is achieved when the equilibrium conversion is obtained in the redox cycle at 800°C. When assuming chemical equilibrium, increasing the process temperature results in a low process efficiency due to a large amount of unreacted steam that needs to be condensed to separate the hydrogen product. Using experimental data in the process simulation, a high-energy efficiency is obtained at 920°C (39%) compared with the efficiency at 800°C (29%). This is caused by the low conversion in the reduction at 800°C. Improving the iron oxide material to enhance the reduction with pyrolysis oil at 800°C, is therefore suggested.
Original languageEnglish
Pages (from-to)125-135
JournalClean Technologies and Environmental Policy
Issue number2
Publication statusPublished - 2010


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