10.9. HEAT EFFECTS AND TEMPERATURE VARIATIONS IN ABSORPTION
10.9A. Heat Effects in Absorption
The temperature in an absorption tower can vary from the top to the bottom of the tower when the inlet gas contains a relatively high concentration of solute. Solute absorption by the liquid yields a heat of solution which raises the liquid temperature. Also, if evaporation of the solvent to the gas phase occurs, the liquid temperature is cooled. The curvature of the equilibrium line depends upon the absorption of the solute, the heat-transfer rate between phases, and the evaporation or condensation of the liquid solvent.
Calculated temperature profiles may also have a maximum in the tower. This can occur when the entering gas temperature is considerably ...
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