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Issue 4, 2016
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Towards an improved process for hydrogen production: the chemical-loop reforming of ethanol

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Abstract

M-modified ferrospinels with the formula M0.6Fe2.4Oy (M = Co, Mn or Co/Mn) were employed as ionic oxygen and electron carrier materials for an alternative sustainable route to produce hydrogen via chemical-loop reforming of ethanol. The new materials were tested in terms of both redox properties and catalytic activity to generate hydrogen by oxidation with steam, after a reductive step carried out with ethanol. In addition, the research includes in situ DRIFTS and in situ XPS studies that allowed the extraction of information at the molecular level and following surface changes within the reduction/re-oxidation processes during ethanol chemical-loop reforming. It was found that Co(II)-incorporation in spinels effectively improves decomposition/oxidation of ethanol, however a greater amount of coke is accumulated. On the other hand, addition of Mn(II) into the system helps to significantly reduce the amount of coke and hence to avoid fast deactivation of the material. Thus, the behavior of Co0.3Mn0.3Fe2.4Oy was shown to be the most promising one, as this material forms less coke during the reduction step, and consequently less COx is generated during the re-oxidation step with water, nevertheless a high hydrogen yield is maintained.

Graphical abstract: Towards an improved process for hydrogen production: the chemical-loop reforming of ethanol

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Publication details

The article was received on 09 Sep 2015, accepted on 30 Sep 2015 and first published on 01 Oct 2015


Article type: Paper
DOI: 10.1039/C5GC02139A
Green Chem., 2016,18, 1038-1050

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    Towards an improved process for hydrogen production: the chemical-loop reforming of ethanol

    O. Vozniuk, S. Agnoli, L. Artiglia, A. Vassoi, N. Tanchoux, F. Di Renzo, G. Granozzi and F. Cavani, Green Chem., 2016, 18, 1038
    DOI: 10.1039/C5GC02139A

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