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Talks and Poster Presentations (with Proceedings-Entry):

A. Prethaler, T. Vogl, G. Mori, W. Havlik, G. Zehethofer, S. Hönig, E. Rosenberg:
"Evaluation of performance of gas and gas condensate inhibitors with a laboratory two phase flow";
Talk: Corrosion 2014, San Antonio, United States; 03-09-2014 - 03-14-2014; in: "Proceedings of Corrosion 2014", (2014), ISSN: 0361-4409; 2491 - 2505.



English abstract:
Three different inhibitors have been tested in a two-phase laboratory flow loop system with carbon steel tubes under conditions like they are very common in European gas wells with a gas-liquid ratio of 20,000.After a detailed description of the experimental setups, degradation rates of material API (1) L-80 as function of flow velocity and inhibitor dosing are presented. Inhibitor 1 was based on ethoxylated phosphate coco-amine salt dissolved in benzene, inhibitor 2 was an imidazoline dissolved in ethylene glycol with additions of hexamethylenediamine and thioglycolic acid. Inhibitor 3 exhibits as an active ingredient alkylamine dissolved in ethylene glycol and different alcohols. Analysis of inhibitors was done with gas chromatography to determine volatile species and with liquid chromatography to characterize non-volatile species. Results show for all investigated superficial flow velocities in a range between 3 and 35 m/s that alkylamine based inhibitor exhibits the best performance. Dosing with around 50 ppm (addition to the liquid phase) is sufficient to fully protect carbon steel. The imidazoline based inhibitor reaches a high performance by addition of 100 ppm whereas the ethoxylated phosphate coco-amine salt based inhibitor exhibits a critical concentration much higher than 100 ppm to sufficiently protect carbon steel. Tested flow regimes were annular and wavy flow.


Electronic version of the publication:
http://toc.proceedings.com/23665webtoc.pdf


Created from the Publication Database of the Vienna University of Technology.