The temperature of the lean glycol entering the contactor has an effect on the gas dew-point depression and should be held low to minimize required circulation rate. High glycol losses to the gas exiting the contactor may occur when the lean glycol temperature gets too hot. On the other hand, the lean glycol temperature should be kept slightly above the contactor gas temperature to prevent hydrocarbon condensation in the contactor and subsequent foaming of the glycol. Most designs call for a lean glycol temperature 10°F hotter than the gas exiting the contactor.
