Triethylene Glycol Solubility in High-Pressure Methane: New Experimental Data at 40 to 60 °C

Abstract

Increasing ambient temperatures in inland locations has meant that triethylene glycol (TEG) absorbers used to dehydrate raw natural gas may need to operate at temperatures of up to 60 °C. These higher temperatures may lead to increased TEG slippage into the downstream gas, but the extent of this slippage is not readily estimated due to a lack of appropriate vapor-liquid equilibrium data. In this work, new laboratory data for the gas phase concentration of triethylene glycol (TEG) in high-pressure methane (CH4) are presented, at pressures of up to 134 bar and temperatures of 40, 50, and 60 °C. The new data are consistent with published data for TEG solubility in high-pressure CH4 at lower tem..