4.6 Article

Rapid Growth of the CO2 Hydrate Induced by Mixing Trace Tetrafluoroethane

Journal

ACS OMEGA
Volume 8, Issue 44, Pages 41232-41242

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsomega.3c04578

Keywords

-

Ask authors/readers for more resources

This study investigates the effects of R134a on the formation of CO2 hydrate using a visual experimental system. The results show that the addition of trace R134a significantly increases the conversion rate of CO2 hydrate and enhances gas consumption. It is also found that the R134a/CO2 mixed hydrate formed under the action of SDS has a capillary mechanism, promoting the formation of CO2 hydrate.
Rapid formation of the CO2 hydrate can be significantly induced by the gaseous thermodynamic promoter 1,1,1,2-tetrafluoroethane(R134a) due to the mild phase equilibrium conditions, although the formation mechanism and dynamic behavior are not clear. Therefore, a visual experimental system was developed to study the effects of different concentrations of R134a on the induction time, gas consumption, and growth morphology of the CO2 hydrate. At the same time, the combined effects under stirring and sodium dodecyl sulfate (SDS) systems were also studied. In addition, visualization and experimental model diagrams were combined to explain the fast formation mechanism of the R134a/CO2 hydrate. The results show that the CO2 hydrate average conversion rate was increased by more than 63% with the addition of mixed trace R134a(7%). A special phenomenon is found that two temperature peaks appear on the hydrate formation temperature curve, corresponding to two different stages of hydrate formation when stirring or SDS is added to the mixed gas reaction system. Furthermore, the gas consumption in stirring and SDS systems increases by 9 and 44%, respectively. Finally, it is also found that the R134a/CO2 mixed hydrate formed under the action of SDS has a capillary mechanism, which provides a gas-liquid phase exchange channel and a large number of nucleation sites for CO2 hydrate, thus promoting the formation of CO2 hydrate. This paper provides a novel, simple, and efficient method for CO2 hydrate gas storage technology.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available