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Everybody:

I am doing a detail design about HDS (hydrodesulfurization) desulfur treatment, the general process description is following:

HDS come from refinery cooled down into two phase flow at 40 C by exchanger, and separared through a separator, the liquid hydrocaron (the mainly composition are C4 AND C5) and gas are routed to two MDEA contactor respectively for desulfur.

my question is: which issues should be concerned for liquid hydrocarbon desulfur contactor during the operation?