Development of Fe2O3-based, Al2O3-stabilized Oxygen Carriers using Sol-gel Technique for H2 Production via Chemical Looping
Open access
Datum
2017-07Typ
- Conference Paper
ETH Bibliographie
yes
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Abstract
A modification of the chemical looping combustion (CLC) process allows the production of high purity hydrogen
from biomass (with simultaneous CO2 capture) on the distributed scale. Here, we report the development of Fe2O3-
based, Al2O3-supported oxygen carriers using a sol-gel technique. We assess the influence of the iron precursor on the
morphological properties, chemical composition and cyclic redox stability of the oxygen carrier. Three iron
precursors, i.e. iron nitrate, iron chloride and iron acetylacetonate, were used to synthesize oxygen carriers containing
80 wt. % of Fe2O3. Using iron nitrate and iron acetylacetonate as the iron precursor resulted in materials with a high
H2 yield. However, both materials showed some decay in the hydrogen yield with cycle number. Al2O3-stabilized
Fe2O3 synthesized using iron chloride as the iron precursor showed no appreciable decay over the 15 cycles tested,
albeit the amount of hydrogen produced was significantly lower when compared to the other two iron precursors. This
observation can be attributed to the large fraction of hercynite (FeAl2O4) in this material. Hercynite stabilizes iron and
prevents sintering, but does not participate in the redox reactions. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000179351Publikationsstatus
publishedExterne Links
Buchtitel
13th International Conference on Greenhouse Gas Control Technologies, GHGT-13Zeitschrift / Serie
Energy ProcediaBand
Seiten / Artikelnummer
Verlag
ElsevierKonferenz
Thema
Chemical looping combustion; Sol-gel; Fe2O3; Hydrogen productionOrganisationseinheit
03865 - Müller, Christoph R. / Müller, Christoph R.
ETH Bibliographie
yes
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