Comment on ‘Chemical oscillations induced by flow transports’ [J. Wang, Chem. Phys. Lett. 360 (2002) 289–293]

A recent theoretical study published in this journal suggests that it is possible to observe damped chemical oscillations in a system containing linear feedback and no chemical reaction. The model system consists of a loop of reactors coupled by mass transport, into which a non-reacting chemical is injected. In this Letter, we demonstrate that such oscillations correspond to the repeated passage of a chemical pulse around the closed loop.