The catalyst was deposited on glass beads (150-212 µm) following a previously published procedure, prior to the placement in the glass reactor. A layer of the catalyst was obtained on the glass beads by first grinding the catalyst, followed by mixing with the glass beads. Approximately 1.5 grams of coated beads were deposited in the glass reactor (1.0 wt% of catalyst). The catalysts were supplied by partners, (produced based on literature ), apart from commercially available Co3O4 (Sigma Aldrich). The desired parameters for the reaction could be set in the graphical user interface. Samples were taken after steady-state was reached, whereafter the transient behaviour could be investigated.