ABSTRACT
The glycol dehydration unit is extensively used in the oil and gas industry to produce dehydrated gas. The saturated gas, if left without treatment, can cause major problems, including:
• Hydrate formation • Water dropouts that can cause an excessively corrosive environment
if CO
and H
S are present • Ice formation • Excess water vapor that will reduce the heating value of the gas • Two-phase flow (due to water dropouts) that can lead to pres-
sure-drop problems
Normally, the gas is dehydrated to a moisture level of 65 mg/Sm
(sometimes, a higher value of 127 mg/Sm
is used). Two commonly used methods to dehydrate the gas are:
• Using solid desiccant: commonly used desiccants are silica gel, activated alumina, molecular sieve, etc.
