Teresa, I do not know the details for that specific facility but several operators and/or gathering companies have installed amine gas treating plants for the removal of CO2 (carbon dioxide) and H2S (hydrogen sulfide) from the Haynesville Shale gas production. This is required to comply with gas sales pipeline specifications.
Teresa, I believe Regency owns this. Kinder Morgan operates an amine plant in there for them. Probaly a few dehys in there too that takes the water out of the gas.