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Please have a look at the site below, it gives a very good explanation of the different uses of MEG and TEG. Some addition: Because the possible water content goes up in the order MEG<DEG<TEG, I'd expected TEG to have a better affinity for water, but it doesn't. The reason why TEG is used, is because it has a lower vapor pressure, so you will lose less in your process. Tetra EG would be better, but it's more viscous, so it would cost more to pump it around. You need to take into account more properties than only the hygroscopicity. Apparently, MEG is preferred for the low-temperature process with MEG injection, but it's not even cheaper! I'd say this satisfies my similar question for about 90%. http://www.jmcampbell.com/march-2007

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16y ago

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