Related Experiment Video
Updated: Jun 1, 2026

Methane Hydrate Crystallization on Sessile Water Droplets
Published on: May 26, 2021
Effect of organic matters on CO2 hydrate formation in Ulleung Basin sediment suspensions
Rheo B Lamorena1, Daeseung Kyung, Woojin Lee
1Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Korea.
Abstract:
Marine sediment core samples collected from a gas hydrate deposit site (Ulleung Basin (UB), East Sea, Korea) were explored to identify the role of sediment organic matters (SOMs) on the formation of CO(2) hydrate. Two distinct CO(2) hydrate formation regimes (favorable (≤40 min) and unfavorable (>250 min)) were observed from the hydrate formation tests. CO(2) hydrate induction time in UB sediment suspensions was approximately seven times faster than that in UB sediment suspensions without SOMs (baked UB), showing a direct influence of SOMs. Spectrometric and spectroscopic analyses confirmed the existence of different types of SOMs including nonhumic and humic substances in UB sediment samples. We found SOMs with aromatic ring structures in all sediment extracts and SOMs with amine and amide groups and lignin in alkaline extracts. SOMs were extracted from UB sediment core samples (1 g each). Measured CO(2) hydrate induction times were different in baked UB sediment suspensions with different extracts of UB sediments. The experimental results demonstrated that SOMs can play a significant role to accelerate the formation of CO(2) hydrate in UB sediment suspensions, suggesting that the gas hydrate deposit site at UB may be a proper place for CO(2) sequestration as a form of CO(2) hydrate.
More Related Videos
11:38In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
Published on: February 1, 2020
08:38Combined Size and Density Fractionation of Soils for Investigations of Organo-Mineral Interactions
Published on: February 15, 2019
Related Concept Videos
Physical Properties Affecting Solubility
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
Entropy and Solvation
Colloidal precipitates
Gravimetry: Inorganic And Organic Precipitating Agents
Aldehydes and Ketones with Water: Hydrate Formation
The formation of hydrates is a reversible reaction. Hydrate formation is influenced by steric and electronic factors accompanying the alkyl substituents on the carbonyl group: The rate of hydrate formation increases with a decrease in the number of alkyl groups attached to the carbonyl carbon. Hence,...
Freshwater Microbial Ecology