Reactive mixing in a wavy torus reactor (VVTR) has been examined experimentally. Its performances are compared to these of two other reactors: a plane torus reactor (PTR) and a baffled stirred tank reactor (BSTR). hydrodynamics of mixing has been studied using a plug flow model with axial dispersion for the WTR and PTR. The effect of axial dispersion on the kinetic of a chemical reaction was then analysed for the VVTR, PTR and BSTR. Mixing times were slightly longer for the VVTR due to a weaker axial dispersion. We also noticed an improvement of the convertion rate for low dissipated power.