An investigation of the wall heat transfer in fixed bed reactor at atmospheric and high pressure

الملخص EN

A wall heat transfer parameters in fixed bed in a radial direction using air, carbon dioxide and helium has been measured.

In addition, the radial wall heat coefficient in the same fixed bed was investigated under high pressure (up to 20 bar).

The temperature gradients obtained from the experimental data were analyzed by the two-dimensional pseudo-homogeneous model to determine the wall heat transfer coefficient.

The results obtained from experimental data for atmospheric and high pressure indicates that the wall heat transfer coefficient increase with increasing Reynolds number at both pressures.

However, the effect of pressure upon wall heat transfer coefficient as function of Reynolds number indicates that pressure higher than atmospheric cause a decrease in the wall heat transfer and the values of atmospheric pressure were found to lie well above those at high pressures.