The higher the concentration of the lean glycol the greater the dewpoint depression for a given glycol circulation rate and number of trays. Figure 8-9…
The temperature of the lean glycol entering the contactor has an effect on the gas dew-point depression and should be held low to minimize required…
The glycol and the gas do not reach equilibrium on each tray. A tray efficiency of 25% is commonly used for design. That is, if…
Contactor pressures have little effect on the glycol absorption process as long as the pressures remain below 3,000 psig. At a constant temperature the water…
At constant pressure, the water content of the inlet gas increases as the inlet gas temperature increases. For example, at 1,000 psia and 80°F gas…
The commonly available glycols and their uses are: 1. Ethylene glycol—High vapor equilibrium with gas so tend to lose to gas phase in contactor. Use…
Since there is a large difference between the boiling point of triethylene glycol (546°F) and water (212°F), the still column can be relatively short (10…
On larger streams filter separators are used as inlet scrubbers to further reduce glycol contamination and thus increase the life of the glycol charge. Due…
Most glycol dehydration processes are continuous. That is, gas and glycol flow continuously through a vessel (the “contactor” or “absorber”) where they come in contact…
By far the most common process for dehydrating natural gas is to contact the gas with a hygroscopic liquid such as one of the glycois.…