Experiments were conducted in a thermogravimetric analyser (TGA) and a prototype miniaturised micro-reactor on magnetite (Fe3O4) and wuestite (FeO) metal oxides under both pure methane and pure steam environments. Results show that the concentration of methane in the product gas gradually decreases while Fe3O4 is being transformed to FeO. However, on or about a fractional conversion of 60% the slope of the CH4 plot sharply increases. This profound change can be attributed to catalytic effect of FeO on methane decomposition. Similarly, the H2 plot picks up rapidly and reaches its maximum value of 98% at a fractional conversion of 30%. The conversion times in the micro-reactor were found to be much shorter than TGA experiments.
Chemeca 2010: Engineering at the Edge. Proceedings of Chemeca 2010: Engineering at the Edge (Adelaide, S.A. 26-29 September, 2010)