The effect tetra butyl ammonium hydroxide and tween on the kinetics of carbon dioxide hydrate formation

Abstract

In this research, the kinetics of CO₂ hydrate formation in the presence and absence of TBAOH as a thermodynamic additive and tween as a kinetic additive is investigated. A high-pressure autoclave equipped with a rocking-cell mixer was applied to determine the effect of TBAOH and tween on the process of carbon dioxide hydrate formation. The findings of the experiments show that using TBAOH had a dual effect on the formation of carbon dioxide hydrate. Low concentrations of TBAOH presented a positive effect on the CO₂ hydrate formation kinetics but using this component with a mass fraction of 8% inhibited the quantity of gas uptake and storage capacity (SC) at the feed pressure of 3 MPa. Using 10 and 300 ppm tween 80 promotes the formation of CO₂ hydrate kinetics. Investigating the influence of simultaneous utilization of TBAOH and tween 80 on the quantity of the formation CO₂ hydrate showed that this system decreased the quantity of CO₂ uptake in comparison with aqueous solutions of tween and TBAOH.

Keywords:

• Carbon dioxide
• gas hydrate
• kinetic
• TBAOH
• tween