When using coarse magnesium turnings, a broader particle size distribution is present. Therefore, the magnesium bed as a whole is more inhomogeneous compared to a bed of finer turnings. According to the RTD results for non-reactive Mg beds, the small amplitudes and high frequencies of pump D have only a limited effect on the degree of backmixing. Therefore, pump C and pump D exhibit similar selectivities. Although pump A does only pulse with long periods, it does exhibit a distinct pulse generated by switching between the two alternating syringes, which is noticeable by a brief dip in volumetric flow rate (see part 1). This single but distinct pulse appears to have a positive effect on the flow behaviour in the magnesium bed, most likely because the momentum change of this pulse is large enough to induce movement of the turnings. For fine turnings, the highest selectivity was recorded with the pulsation-free pump C. Pumps or pump combinations that exhibit pulsed flow led to lower selectivities. It is concluded that for a compacted magnesium bed of fine magnesium turnings, a pulsation-free pump leads to the lowest degree of backmixing/axial dispersion. In contrast to the non-reactive RTD measurements, pulsed flow conditions seemingly do not reduce axial dispersion. For the non-reactive RTD measurements (see part 1), an increase of the Bo could be realized by tuning the oscillatory Reynolds number Re0. Experiments with pump parameters that were found to be most .