Assessment of new and improved solvent for pre-elimination of BTEX emissions in glycol dehydration processes
Chemical Engineering Research and Design • 2016
Publication Information
Authors
Usama Eldemerdash
Keywords
Monoethylene glycol, Natural gas, Dehydration, Desiccant, BTEX, Hydrocarbon emissionsa
Journal
Chemical Engineering Research and Design
Publisher
Elsevier
Volume
115
Issue
part A
Pages
214-220
publication.type
International
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
Emission of benzene, toluene, ethylbenzene, and xylene (BTEX) from natural gas dehydra-tion units was highlighted as an acute environmental impact. Furthermore, recent stringentenvironmental regulations addressed a pressing need of knowledge to eliminate hydrocar-bon’s emissions from glycol dehydrators. The primary objective of this study is to combinethe minimization of BTEX emissions with an efficient dew point control. However, theapproach in this research emphasis on the cause of the BTEX emissions rather than thepost treatment process. Chemically modified monoethylene glycol (mMEG) is proposed asa new solvent to replace triethylene glycol (TEG) in the dehydration process. The results ofthis study showed a significant improvement in the dehydration performance together withthe elimination of (BTEX) emissions. The results demonstrated that mMEG could producegas water content of 0.16 ppm (7.6 × 10−3lb/mmscf) and near zero level of BTEX. This inves-tigation suggests that using mMEG can solve the environmental issue of BTEX in the naturalgas dehydration process.
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