Kinetics of (TBAF + CO2) semi-clathrate hydrate formation in the presence and absence of SDS

• Published in: Petroleum science 2018-05, Vol.15 (2), p.375-384
• Main Authors: Mohammadi, A., Pakzad, M., Mohammadi, A. H., Jahangiri, A.
• Format: Article
• Language: English
• Subjects: Batch reactors; Carbon dioxide; Carbon sequestration; CO2; Communication; Earth and Environmental Science; Earth Sciences; Economics and Management; Energy Policy; Fluorides; Gas hydrate; Gas hydrates; Hydrates; Industrial and Production Engineering; Industrial Chemistry/Chemical Engineering; Kinetics; Mineral Resources; Original Paper; Reaction kinetics; SDS; Semi-clathrate hydrate; Sodium; Sodium dodecyl sulfate; Storage capacity; Storage conditions; TBAF; Uptake
• ISSN: 1672-5107; 1995-8226
• DOI: 10.1007/s12182-018-0221-6

In this communication, the impacts of adding SDS (sodium dodecyl sulfate), TBAF (tetra- n -butylammonium fluoride) and the mixture of SDS + TBAF on the main kinetic parameters of CO 2 hydrate formation (induction time, the quantity and rate of gas uptake, and storage capacity) were investigated. The tests were performed under stirring conditions at T  = 5 °C and P  = 3.8 MPa in a 169 cm 3 batch reactor. The results show that adding SDS with a concentration of 400 ppm, TBAF with a concentration of 1–5 wt%, and the mixture of SDS + TBAF, would increase the storage capacity of CO 2 hydrate and the quantity of gas uptake, and decrease the induction time of hydrate formation process. The addition of 5 wt% of TBAF and 400 ppm of SDS would increase the CO 2 hydrate storage capacity by 86.1% and 81.6%, respectively, compared to pure water. Investigation of the impact of SDS, TBAF and their mixture on the rate of gas uptake indicates that the mixture of SDS + TBAF does not have a significant effect on the rate of gas uptake during hydrate formation process.