Article
Engineering, Environmental
Gaurav Bhattacharjee, Hari Prakash Veluswamy, Asheesh Kumar, Praveen Linga
Summary: Solidified Natural Gas (SNG) technology provides a compact and safe option for large-scale natural gas storage. Introducing thermodynamic promoters like THF into the classical methane-water system enables rapid gas uptake at moderate pressure and temperature. The study compares the stability of cylindrical mixed methane-THF (sII) and pure methane (sI) hydrate pellets, with results showing exceptional stability of sII hydrates and significant gas evolution from sI hydrates stored at different temperatures. Long-term stability testing of methane-THF (sII) hydrate pellets produced using fresh and seawater demonstrates the commercial viability of SNG technology.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Satoshi Takeya, Sanehiro Muromachi, Akio Yoneyama, Keiichi Hirano, Kazuyuki Hyodo, John A. Ripmeester
Summary: Methane hydrate in the superheated state can be stored for a long time, and by coating it with other hydrates, the need for a defect-free interface between different hydrates can be eliminated. This study found that liquid cyclopentane can keep gas hydrate crystals intact and convert the outer layer of methane hydrate into cyclopentane hydrate.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Engineering, Environmental
Jun Chen, Jianjian Wu, Yaosong Zeng, Zhikai Liang, Guangjin Chen, Bei Liu, Zhi Li, Bin Deng
Summary: The self-preservation effect of methane hydrate was improved by introducing deuterium oxides (D2O) as host molecules, leading to an increase in stability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Alberto Maria Gambelli, Federico Rossi
Summary: This study investigates the process of methane hydrate formation and dissociation in a small-scale controlled environment with porous sediment. It addresses the lack of information about the intrinsic properties of these processes, such as memory effect and anomalous self-preservation, in a lab-scale apparatus. Experimental results demonstrate the improvement of the process during the initial nucleation phase through the memory effect and divide the formation process into two distinct steps.
Article
Thermodynamics
A. V. Meleshkin, A. A. Shkoldina
Summary: This study theoretically assessed the increase in hydration mass over time during gas hydrate synthesis, using data from experiments and simulations. The results provide a theoretical foundation for further research into the synthesis of gas hydrates.
JOURNAL OF ENGINEERING THERMOPHYSICS
(2021)
Article
Energy & Fuels
Shashika Gajanayake, Ranjith Pathegama Gamage, Pabasara Wanniarachchige
Summary: This study aims to investigate the formation characteristics of hydrate in a porous medium under different confining conditions, focusing on the effect of confining pressure on hydrate nucleation, growth, and saturation. The experimental results demonstrate the random nature of hydrate formation and the direct relationship between pressure decrease and hydrate saturation. Higher confining pressure conditions contribute to greater hydrate saturation within the porous medium.
Article
Chemistry, Physical
Ki Hun Park, Dong Hyun Kim, Minjun Cha
Summary: In this study, the phase equilibria, conformation, crystal structures, and host-guest interactions of binary cyclopropylamine+methane and cyclopentylamine+methane hydrates were investigated. The results provided an improved understanding of the unique nature of host-guest inclusion phenomena.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Engineering, Environmental
Yongji Wu, Yurong He, Ming Zhai, Tianqi Tang
Summary: Research shows that using wet activated carbon samples and ice induction can effectively improve the synthesis rate and storage capacity of methane hydrates. By combining certain water content, appropriate particle size of activated carbon, and suitable pressure conditions, methane hydrates with high methane storage capacity can be obtained. This innovative technology is of great significance for the development of solidified natural gas technology.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Yu Feng, Yang Zhao, Yuze Han, Yanzhen Liu, Lunxiang Zhang, Jiafei Zhao, Lei Yang, Yongchen Song
Summary: The formation and dissociation behavior of CO2 hydrates in the presence of clay particles were investigated using low-field nuclear magnetic resonance. It was found that montmorillonite particles significantly promoted the conversion of water into hydrate, while illite particles had a weaker promoting effect. According to the DLVO theory, the total interaction potential between montmorillonite particles was much higher than that between illite particles.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Byeonggwan Lee, Kyuchul Shin, Sanehiro Muromachi, Igor L. Moudrakovski, Christopher I. Ratcliffe, John A. Ripmeester
Summary: Antifreezes such as methanol and ammonia can enhance methane storage in binary clathrate hydrates like THF and TBAB. Methanol acts as a catalyst for methane hydrate formation and induces TBAB hydrates to form an orthorhombic structure suitable for methane storage. These findings suggest that methanol could play a crucial role in hydrate-based methane storage systems.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Zhixia Deng, Shuanshi Fan, Yanhong Wang, Xuemei Lang, Gang Li
Summary: The addition of stainless steel fiber in the solution for gas storage in hydrates improves the heat removal issue during hydration process, enhances gas storage speed and capacity by increasing nucleation sites. Longer stainless steel fibers show higher gas storage capacity and methane uptake rate compared to shorter fibers. Stainless steel fiber combined with sodium dodecyl sulfate demonstrates excellent gas storage performance with reduced usage amount and increased volume gas storage density.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Guodong Zhang, Runcheng Zhang, Fei Wang
Summary: Although activated carbon can enhance hydrate nucleation kinetics, the promotion is significantly reduced under low driving force and large water contents. Immobilizing silver nanoparticles on activated carbon improves hydrate nucleation, shortening induction time by enhancing external nucleation. These findings provide insights for utilizing porous carbon materials in hydrate-based solidified natural gas technologies.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Asheesh Kumar, Hari Prakash Veluswamy, Sanat Kumar, Rajnish Kumar, Praveen Linga
Summary: Clathrate hydrate-based sustainable technologies, such as solidified natural gas (SNG) technology, show great potential for storing natural gas. Experiments on mixed hydrates in a seawater environment reveal the promotional effect of seawater on hydrate formation and suggest the economic feasibility of using natural seawater to enhance SNG technology.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Energy & Fuels
Nithin B. Kummamuru, Geert Watson, Radu-George Ciocarlan, Sammy W. Verbruggen, Pegie Cool, Pascal Van der Voort, Patrice Perreault
Summary: This study explores the potential of two hydrophobic porous materials in promoting methane clathrate formation. The results show that both materials can facilitate the formation of methane clathrates under mild operating conditions and have high methane storage capacities. Overall, the study concludes that these materials are effective promoters of methane clathrates, making clathrate-based methane storage and transport technology industrially viable.
Article
Energy & Fuels
Yulia F. Chirkova, Andrey S. Stoporev, Roman S. Pavelyev, Mikhail A. Varfolomeev
Summary: In recent years, interest in gas hydrates has grown due to their potential as an energy source and environmentally friendly alternative to storing and transporting natural gas. This study compared the effectiveness of sulfonated castor oil (SCO) and sodium dodecyl sulfate (SDS) as promoting reagents in the formation and decomposition of methane and methane-propane hydrates in a porous medium. The results showed that SCO significantly improved the water conversion rate in methane hydrates due to enhanced mass transfer in the presence of surfactants, while the effect on methane-propane hydrates was limited. Both SCO and SDS accelerated hydrate formation, but SCO required less supercooling. These findings suggest that SCO is comparable to SDS in promoting activity in porous media with varying water saturation.
