The stability of the composite materials for hydrogen production was studied in a microreactor, reducing with 5% carbon
monoxide in helium and oxidising with 5% water in helium at
850 C over 25 redox cycles. Hydrogen production was stable for
LSF731 and LSF-30Fe-Pec-P but iron oxide particles (80–160 lm)
experienced a decrease in hydrogen production due to agglomeration. The hydrogen production in micromoles during the oxidation
of the 25th cycle was eight times higher for the composite material
than for iron oxide and four times higher than for LSF731 alone. A
23% increase in the expected hydrogen production, equivalent to
the expected available oxygen, was observed for LSF-30Fe-Pec-P.
This suggests that LSF731 is more reducible when part of the
composite material.