An Analysis of BTEX Emissions from Amine Sweeteningand Glycol Dehydration Facilities

摘要

The amount of BTEX components emitted from gas processing facilities hasbecome a significant environmental concern. Recently, amine sweetening units havereceived the same environmental scrutiny as glycol units with regard to BTEX emissions.This paper compares the BTEX emissions from amine sweetening and glycol dehydrationfacilities as well as the methods available to minimize BTEX pickup in these systems.Reducing solvent circulation rates in both the amine and glycol units and minimizing thelean amine temperature were found to be the most effective ways of limiting overallBTEX emissions. Changing solvent type can also reduce emissions, but the effect ontreated gas quality must be considered as well. In the cases investigated approximately25% of the overall BTEX emissions came from the amine units, while the remaining 75%came from the glycol system.