Chaotic dynamics in an unstirred ferroin catalyzed Belousov-Zhabotinsky reaction

The Belousov–Zhabotinsky (BZ) reaction is the best known example of far from equilibrium self-organizing
chemical reaction. Among the many dynamical behaviors that this reaction can exhibit, spatiotemporal
chaos attracted particular interest, both for the ferroin and cerium catalyzed systems. In recent
years transient chaos was found in the cerium catalyzed BZ reaction, when conducted in batch and
unstirred reactors. It was established that the chaotic oscillations, originated by the coupling among
chemical kinetics and transport phenomena, appeared and disappeared following a Ruelle–Takens–
Newhouse scenario. In this Letter, we show results about the ferroin catalyzed system conducted in batch
and unstirred reactors. An aperiodic transient regime was detected and we show that this is a genuine
manifestation of spatio-temporal chaos.