Micro kinetic analysis of the CO2 hydrate formation and dissociation with L-tryptophan in brine via high pressure in situ Raman spectroscopy for CO2 sequestration

Investigation of the Influence Mechanism of CO2 Hydrate Formation in Seawater Systems in the Presence of Solid Promoters by Combining In Situ Raman Analysis with Macroscopic Experiments

“…The Raman peaks at approximately 3200 and 3400 cm –1 , as mentioned above, corresponded to the strong and weak hydrogen-bonded water, respectively, representing structural water and free water. ,, Figure shows the comparison of the shift numbers and IS/IW between SysR.1 and SysR.0 under the atmospheric condition. Here, IS/IW denotes the ratio of the intensity of the strong hydrogen bond peak to that of the weak hydrogen bond, and the increase of the IS/IW means that the hydrates are more likely to form.…”

Dual Promotional Effect of l-Tryptophan and 1,3-Dioxane on CO2 Hydrate Kinetics in Seawater under Static/Unstatic Conditions for Carbon Capture and Storage Application

“…55 3.1.1. Effect of L-Tryptophan on CO 2 Hydrate Kinetics in Static SW. Jeenmuang et al 54 suggested that the use of Ltryptophan could enhance the CO 2 hydrate formation kinetics in the presence of NaCl. Thus, next, a set of experiments were conducted with the SW and 1000 ppm of L-tryptophan.…”

“…The salts also act as an inhibitor for the CO 2 hydrate formation process. Jeenmuang et al studied the effect of salts, like NaCl, on the CO 2 hydrate formation kinetics and found that NaCl also acts as an inhibitor for the CO 2 hydrate formation process. As a result of the presence of NaCl, in the water phase, Na + and Cl – ions interact with the water molecules, causing the decrease of water-phase activity and the overall solubility of CO 2 in the water phase …”

Numerical Simulation of CO2 Storage in Subseabed Sediments in the Shenhu Area, South China Sea: The Effect of Reservoir Permeability Anisotropy

“…The horizontal well is located in the middle of the reservoir ( y = −85 m) with a radius of 0.1 m , and a length of 200 m along the z -axis, through which liquid CO 2 is injected into the reservoir. To simplify the model, the following assumptions have been made: deformation of the sediments is ignored; CO 2 injected into the reservoir quickly reaches a state of local thermal equilibrium; the influence of salinity on hydrate formation is excluded; the mutual dissolution process of CO 2 and water is not considered. However, the process of CO 2 dissolution affects the seepage behavior of fluids within the reservoir and the distribution of CO 2 components in the dissolved, free, and CO 2 hydrate phases, which may affect the accuracy of model predictions.…”