The Effect of Pressure on Induction Time and the Amount of Methane Consumed During Hydrate Formation Process for the System of Water + TBAC + Methane

Induction time and the amount of gas consumed, two important kinetic parameters in gas hydrate formation process, were investigated for the systems of water methane and water TBAC methane, in this research. In order to study the effect of TBAC on the kinetics of methane hydrate formation, three aqueous solutions of TBAC with concentrations of (0, 3, and 5) wt% were prepared. The experiments were carried out (or done) in a 169 cm3 batch reactor and at a temperature of 278.15 K and initial pressures of (6.5 and 8) MPa. The results showed that adding TBAC decreases the induction time of hydrate formation process. The utilization of TBAC with concentration of 3 wt% at 8 MPa decreases the induction time from 437 min to 3 min and increases the amount of gas consumed during hydrate formation %47.09, compared to pure water. The experimental results showed that by increasing the pressure form 6.5 MPa to 8 MPa, the induction time of methane hydrate formation decreases, and the amount of methane consumed increases. In addition, by increasing the pressure form 6.5 MPa to 8 MPa in aqueous solution of TBAC with concentration of 3 wt%, the induction time decreases from 41 min to 4.12 min and the amount of methane consumed increases from 20.98 mmol/mol of solution to 28.29 mmol/mol of solution