(60c) Hydrate Formation and Dissociation in Qatar Sea Water in the Presence of Imidazolium Based Ionic Liquids and Synergents

Qatar has third large natural gas reservoir, transportation of gas from subsea region where the low temperature and high pressure provide favorable conditions for gas hydrates formation. The gas hydrates are crystalline solid compounds that are formed in high pressure and low temperature condition. These crystals have tendency to completely block the transmission lines of oil and gas.

A research work has been conducted to understand the hydrate formation / dissociation condition in Qatar’s sea water using pure methane gas at different pressures 40-120 bars using a PSL system tecknik Gmbh rocking cell assembly. The hydrate formation and dissociation behavior in Qatar sea water has also been studied within the presence of ionic liquids. The ionic liquids 1-ethyl-3-methylimidazolium disulphonate and 1-ethyl-3-methyl imidazolium dicyanamide have been used to study the hydrate inhibition behavior in the Qatar sea water. The selected ionic liquids have shown dual function behavior and have shown tendency to shift both hydrate dissociation temperature and hydrate formation time. In addition to that, the effect of synergents on hydrate formation and dissociation in Qatar sea water has also been tested. The synergents have shown tendency to delay hydrate formation in Qatar sea water by almost 24 hrs. This study can be useful for modeling and designing simulation packages.

Acknowledgement:

This work was made possible by NPRP grant # 6-330-2-140 and GSRA # 2-1-0603-14012 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors