Achieve higher operational efficiency with amine system improvements

D. K. Ralli and P. S. Chauhan, Oil and Natural Gas Corp. (ONGC), Mumbai, Maharashtra, India Oil and Natural Gas Corp. (ONGC) operates a plant at India’s western coast to extract value-added products from natural gas and make crude oil suitable for refining. The plant receives approximately 11.5 MMm³d of natural gas, which is treated in gas sweetening units (GSUs) to remove acid gases. Gases from the crude stabilization unit and condensate fractionation unit are also mixed with a natural gas stream prior to gas sweetening. The sweet gas is processed in cryogenic LPG and ethane/propane recovery units (EPRUs), producing LPG, low-aromatic naphtha (LAN), and an ethane-propane mixture as value-ad