Causes of foaming in amine scrubber;
1. Condensation of Hydrocarbons in Amine, due to the low temperature of amine than gas.DT should always be positive. The low temperature of Amine and high temperature of the gas creates negative DT which results in condensation of Hydrocarbons in the Amine.
2. Corrosion particles in the Amine or dirty amine also cause foaming.