Abstract
The alternator model has been used to construct an oscillatory reaction in a continuous-flow stirred tank reactor (CSTR). The unbuffered oxidation of hydrogen sulfite ions by hydrogen peroxide, which is autocatalytic in H+, is linked to the reaction between hexacyanoferrate(II) and hydrogen peroxide, which consumes H+ in a linear fashion. The resulting system gives oscillation in pH and in the concentration of hexacyanoferrate(III). A simple-model, consisting of the empirical rate laws of the component reactions, is used to simulate the experimental results and gives excellent agreement.