CO₂ Hydrate Formation Kinetics in the Presence of TBAB

The objective of the present work was to investigate the effect of TBAB concentration on the CO₂ hydrate formation kinetics. All the experiments were carried out at 280 K temperature, 3.0 MPa pressure, and 300 RPM. Four different TBAB concentrations (5.0, 10.0, 19.0, and 32.0 wt.%) were used to evaluate the performance of the TBAB promoter during CO₂ hydrate formation. Reactor temperature profile, induction time, and gas consumption were studied for the different TBAB concentrations. The reactor temperature increased with an increase in the TBAB concentration and reached its maximum temperature (285.8 K) at 32.0 wt% TBAB concentration. The induction time follows an inversely proportional relationship with TBAB concentration. The lowest induction time was reported at the highest TBAB concentration. The gas consumption rises with the increasing TBAB concentration up to 10.0 wt%. However, a further increase in TBAB concentration resulted in a decrease in gas consumption. The hydrate slurry was formed in a less concentrated TBAB solution, whereas the highly concentrated TBAB solution formed a solid hydrate.