NATURAL GAS DEHYDRATION WITH TRIETHYLENE GLYCOL (TEG)

Abstract

This work studies the dehydration of natural gas using Triethylene Glycol (TEG)” as the dehydrating agent or absorbent to examine the water content of the natural gas stream when the dehydrating agent and the gas flows in counter current manner in an absorption column and to determine hydrate formation temperature and prevent its occurrence. Also to determine the proper amount of the TEG to be used in other not to flood the contactor (absorber) with it and avoid liquid carry over. The natural gas dehydrating plant was designed and simulated using HYSYS software with Process conditions of 6200kpa and 300 C and gas flow rate of 10MMSCFD were inputted into the software and simulated. Five different TEG flow rates were used for the simulation. Results obtained shows that Between a TEG rate of 53L/hr and 70L/hr, the water content is between acceptable range (6lb/MMSCFD-7lb/MMSCFD) which is the water content limit in natural gas. Therefore, using a flow rate above 70liters/h will not add any significant financial value to the revenue derived from the sales of the gas rather it will flood the absorber unit.