January 2004

Special Report: Gas Processing Developments

Improve acid-gas removal of LPG contactors

Consider using these practical troubleshooting and design techniques when optimizing liquid/ liquid contactors

Sargent, A., Seagraves, J., INEOS Oxide GAS/ SPEC Technology Group

Amine treating is commonly used to remove acid gases from natural gas streams. This process is also applied to treating liquefied petroleum gas (LPG) or natural gas liquids (NGL). As demand for LPG and NGL increases, producers will apply high-efficiency contaminant removal systems. Consequently, the criteria for design of amine liquid/ liquid contactors, specifically for random-packed, trayed and structured packed contactors will be stretched to meet higher loading. These practical steps can be used to troubleshoot and quickly evaluate the performance of liquid/ liquid contactors. Flow configuration. In LPG treating, the aqueous amine phase is usually the continuous phase, while the or

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