Process engineers can calculate absorption of H2S and
CO2 in triethylene glycol to optimize operations
When sour natural gas or acid gas is
dehydrated with triethylene glycol (TEG), a substantial amount of H
2S and CO
2is absorbed in the TEG. Upon regeneration of the rich
TEG solution, the acid gas components are liberated. The amount of
these compounds absorbed, and consequently liberated from the
glycol, depends on their concentration in the gas being dehydrated
and the contactor pressure and temperature.
Charts have been generated for
estimating the amount of H
2S and CO
2absorbed per volume of TEG circulated versus the
partial pressure of the acid gas components and the absorber
temperature. These charts were developed on the basis of
experimental data.
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