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The effect of a TEG additive on hydrate formation
Authors:Alireza Jahangiri  Abolfazl Mohammadi  Farhad Salimi
Affiliation:1. Faculty of Engineering, Shahrekord University, Shahrekord, Iran;2. Department of Chemical Engineering, University of Bojnord, Bojnord, Iran;3. Department of Chemical Engineering, Faculty of Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Abstract:In gas industry, gas hydrate formation has both advantages and disadvantages. The best advantage of gas hydrate is Persian Gulf water sweetening, carbon dioxide capture, and gas storage, and its drawbacks are pressure drop, plugging, and explosion in pipelines. In recent years, using the inhibitors to prevent hydrate formation is being considered among researchers. In this study, the new equilibrium data for hydrate formation of inlet natural gas to Gachsaran NGL-1200 refinery with addition of Tri ethylene glycol (TEG) with mass concentration of 5% and 15% in distilled and Persian Gulf waters were measured by constant-volume method. The experimental results show that the hydrate formation conditions will be hard with the increase of TEG concentration in distillated and Persian Gulf waters. In other words, TEG addition to Persian Gulf water had more inhibitory effect in hydrate formation than TEG addition to distilled water. The hydrate formation temperature, in pressure range of 28–29 bars, reduced 0.3°C and 2.7°C for distilled water and 2.8°C and 4.6°C for Persian Gulf water in presence of TEG with mass concentration of 5% and 15%, respectively.
Keywords:equilibrium  gas hydrate  inhibitor  Persian Gulf  TEG
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