Graphene-Based Kinetic Promotion of Gas Hydrate Formation

Abstract

Gas hydrate technology holds great potential in energy and environmental fields, and achieving efficient gas hydrate formation is critical for its industrial application. Graphene is a novel carbon-based nanostructured material with excellent thermal conductivity and a large specific surface area. Therefore, the use of graphene-based materials for the promotion of gas hydrate formation might be feasible and has aroused a lot of interests. Accordingly, to evaluate the current research on graphene-based promotion of gas hydrate formation, this work presents a review of existing studies involving graphene-based promoters of gas hydrate formation. Here, the studies applying various types of graphene-based promoters for gas hydrate formation are listed and detailed, the peculiar properties of graphene-based promoters are discussed, and the promotion mechanisms are analyzed. Through this review, comprehensive insight into graphene-based promotion of gas hydrate formation can be obtained, which can guide the design and applications of novel graphene-based promoters and might contribute to achieving efficient gas hydrate formation.

Comprehensive Review and Perspectives of CO2 Hydrate Storage in Subseafloor Saline Sediments: Formation, Stability, and Optimization Strategies

“…This affinity arises from electrostatic interactions, hydrogen bonding, and van der Waals forces between the NPs' surface functionalities and CO 2 molecules. 108,185 Such interactions facilitate the adsorption and concentration of CO 2 species near the NP surfaces, promoting the nucleation and growth of CO 2 hydrate crystals. 185 Furthermore, the unique morphology and size-dependent properties of NPs play a key role in influencing CO 2 hydrate formation.…”

“…184 NPs, particularly those with high surface area and tailored surface chemistry, such as functionalized graphene nanosheets, metal−organic frameworks (MOFs), or porous silica nanoparticles, tend to interact with CO 2 molecules during the CO 2 hydrate formation. 82,108 At the molecular level, NPs' surfaces, often modified with specific functional groups, possess an inherent affinity for CO 2 molecules. This affinity arises from electrostatic interactions, hydrogen bonding, and van der Waals forces between the NPs' surface functionalities and CO 2 molecules.…”

Nucleation Behavior of Single-Gas Hydrates in the Batch-type Stirred Reactor and Their Promotion Effect with Ultrafine Bubbles: A Mini Review and Perspectives

“…Solid additives can also exhibit this formation-promoting effect. Solid types include nanoparticles of metal and silica, ,, porous media such as zeolitic imidazolate framework, ,− carbon materials such as carbon nanotubes (CNT) and graphene. − Although these additives may be used alone, they are often used in combination with surfactants. These solid additives are thought to promote the crystal growth process, primarily by increasing the thermal conductivity and mass transport within the system.…”

MXene (Ti3C2Tx) as a Promising Substrate for Methane Storage via Enhanced Gas Hydrate Formation

“…Two-dimensional (2D) materials, such as graphene and its derivatives, are very attractive to study the surface-induced crystallization because the materials are entirely a surface and can be easily accessed. 16 However, there are scattered results, and the lack of a structure−performance relationship makes it difficult to draw any precise conclusion regarding which parameter endows the efficient promoter for MH formation. Additionally, the exact contributions from added nanomaterials, particularly the molecular-level understanding, remain incomplete for improving the formation kinetics of MH and the conversion rate of water to hydrate.…”

“…Two-dimensional (2D) materials, such as graphene and its derivatives, are very attractive to study the surface-induced crystallization because the materials are entirely a surface and can be easily accessed . However, there are scattered results, and the lack of a structure–performance relationship makes it difficult to draw any precise conclusion regarding which parameter endows the efficient promoter for MH formation.…”