Acid-gas injection design requires numerous considerations

LISBON GAS PLANT—ConclusionThe design of an acid-gas injection system requires numerous design considerations, as shown in this second of two articles on the Lisbon gas plant, Moab, Utah.This part covers the design and operation of the compression and injection portions of the facility. The first part (OGJ, Mar. 1, 2004, p. 54) discussed the acid-gas enrichment portion with emphasis on the Flexsorb selective amine-treating unit.Acid-gas injectionFig. 1 shows the block-flow diagram for the acid-gas injection (AGI) unit. Enriched acid gas from the Flexsorb regenerator is mixed with methyldiethanolamine (MDEA) raw acid-gas feed that was bypassed around the Flexsorb treating unit. Clic...

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