Abstract

The feedback-induced bifurcation method has been examined as applied to CO oxidation on RhAl 2O 3. Experimental Hopf bifurcation data obtained from operation of the reaction system under feedback control based on measurement of the gas-phase concentration of CO was reproduced by two reaction models. However, a clear distinction between the Hopf bifurcation behavior of the two models was identified when the feedback control was based on the fractional coverage of a surface carbonyl species. Higher-order dynamics resulting from closed-loop operation of the reaction system were also observed. The usefulness of various types of experimental feedback-induced bifurcations as applied to model development is discussed.

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