Causes of fouling in HP Amine Absorber of Hydrocracking unit are as follows;
suspended solids, plugged trays, antifoam performance, off-spec inlet gas, hydrocarbons content, corrosion and erosion of metal components, low filtration/separation efficiency.
The most prominent cause of foaming related to the Hydrocakcing unit is the over-cracking of hydrocarbon feed in the reactor. Due to these lighter hydrocarbons (C1~C4) content in the recycle gas is increased and in the end this would cause foaming in the amine absorber.