By applying the technique of pulse thermal input

the axial heat transfer of a fixed -bed packed with vanadium catalyst was investigated under the conditions that the initial temperature ranged from room temperature to about 500℃

and Re=30~660. It was shown that the correlations for calculating ke

ax and hp presented by Wakao are still applicable to the cases studied here at an average bed temperature under 200℃ but the values of axial thermal conductivity at about 500℃ are higher than those predicted previously.