HEAT CONDUCTION IN ZEOLITE BEDS
- 1 January 1982
- conference paper
- Published by Begell House
Abstract
The thermal conductivity of a bed of Na-Y-zeolite extrudates in equilibrium with water vapor of pressures between < 5 N/m2 and about 90000 N/m2 is measured in the temperature range between 64°C and 216°C. Under these conditions the amount of water absorbed in the zeolite varies between < 1 and more than 30 wt%. The thermal conductivity is in the order of 0.15 W/(K m) and increases with both concentration of absorbed water and temperature. In addition the heat-transfer coefficient at the interface between the zeolite bed and the walls of the measuring cell is determined. It amounts to 25 W/(K m2) for a water-vapor pressure < 5 N/m2 and increases to values in the order of 500 W/(K m2) for pressures > 1400 N/m2. Due to absorption and desorption of water in the zeolite the thermal diffusivity can be smaller by a factor of nine compared to dried beds.Keywords
This publication has 0 references indexed in Scilit: