Redesigned filters solve foaming, amine-loss problems at Louisiana gas plant

Upgrading the amine filtration system at a Lowry, La., gas plant solved persistent foaming and amine- loss problems. After the amine solution became fouled with contaminants, the benefits associated with the high- efficiency formulated amine were all but lost. The problems encountered included lost gas-treating capacity, high energy consumption, and increased costs brought about by foaming, excessive amine losses, and high filter duty. The existing filtration system was then called upon to perform a job beyond its capabilities. After careful analysis, the filtration system was upgraded. New amine-solution filters (cartridges and carbon) were respecified and installed, and an inlet gas-liquid coalescing filter was installed ahead of the absorber and downstream of the existing inlet filter- separator. The plant was then able to achieve the projected performance from the formulated amine.