The effect of sodium halide salts on the kinetics of tetrahydrofuran hydrate formation by using a differential scanning calorimetry method

In this study, the effect of sodium halide salts including Sodium Fluoride, Sodium Iodide, Sodium Bromide, and Sodium Chloride was investigated on the kinetics of tetrahydrofuran hydrate formation by using a differential scanning calorimetry setup. It was found that the anions of salts can destroy hydrogen bonding between the water molecules and prevent the growth of gas hydrate. The fluorine with the smallest ionic radius and the highest enthalpy of hydration was the most effective material to decrease the hydrate growth rate. According to the results, the formation kinetics of hydrate changes with the concentration of salts in a different manner. Results show that the hydrate formation rate decreases with increasing the concentration of salts up to 0.6 wt%, while it increases when the concentration is at a range of 0.6 to 1.2 wt%. The rate begins to decrease by the concentration of >1.2 wt%. It was found that the parameters such as the hydration effect and the activity coefficients of salt solutions can affect the kinetics of tetrahydrofuran hydrate formation. (C) 2019 Elsevier B.V. All rights reserved.