Density measurement of aqueous tetraethylammonium bromide and tetraethylammonium iodide solutions at different temperatures and concentrations

Abstract

Density of the hydrates plays an important role in penetrating the layers of water above hydrate for gas hydrate inhibition and dissociation. This paper discusses the density of Tetraethylammonium Bromide (TEAB) and Tetraethylammonium Iodide (TEAI) as the preliminary screening steps before implementing them in pipeline conditions. Densities of aqueous TEAB and TEAI solutions (0.5, 1.0, 2.5, 5.0 and 10.0 wt %) were investigated at atmospheric pressure over a range of temperature between 293.15 K to 313.15 K. The relationship of density with temperature and concentration are discussed. The molar volume of the solutions with respect to the temperature is also calculated from the experimental value of the density. The results indicate that TEAI with the higher density can be an efficient hydrate inhibitor especially in vertical pipelines.

Keywords

• Quaternary ammonium salts (QAS)
• Hydrates inhibitor
• Flow assurance