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
Chemistry, Physical
Satoshi Takeya, Akihiro Hachikubo
Summary: The study found that the release of C3H8 and C4H10 molecules accelerated the dissociation of hydrates, and different types of hydrates dissociated in a single step at around 200K.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Thermodynamics
Laszlo Trif, Fernanda P. Franguelli, Gyorgy Lendvay, Eszter Majzik, Kende Beres, Laura Bereczki, Imre M. Szilagyi, Rajandra P. Pawar, Laszlo Kotai
Summary: This study investigates the thermal decomposition of two solvatomorphs of decakis(dimethylammonium) dihydrogendodecatungstate under inert and oxidizing atmospheres using various thermal analysis methods. Minor differences in decomposition peak temperatures were observed based on heating rate and atmosphere. Different reactions occur in helium and synthetic air atmospheres, with oxidative coupling products formed in helium and burning of organic fragments in synthetic air above 350 degrees C.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
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
Energy & Fuels
Jyoti Shanker Pandey, Saad Khan, Nicolas von Solms
Summary: This study investigates the effects of amino acids on the formation and stability of CH4 hydrates, finding that histidine can enhance the formation kinetics while methionine can improve the stability and metastability of hydrates. The experimental evidence supports the use of amino acids as stabilizers for the storage and transportation of natural gas.
Article
Engineering, Environmental
Shengli Li, Shijing Zhang, Kai Su, Qiang Liu, Haonan Wu, Zhiyong Chang
Summary: This study investigates the formation and decomposition processes of binary and ternary gas hydrates. The results show that in the formation stage, CH4 is adsorbed in the hydrate cages constructed by C2H6 and C3H8. During the decompositions, CH4 and C2H6 molecules are preferentially released from the hydrate structures, while C3H8 molecules can stay in the hydrate phase.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
S. Y. Misyura, I. G. Donskoy
Summary: Methane gas hydrate is a significant reservoir of low-carbon energy, with the potential for environmentally friendly energy production. The dissociation mechanisms of methane hydrates are still not well understood, hindering the development of related technologies. There are differences in dissociation rates between natural gas hydrate and artificial methane hydrate, and using larger sphere diameters can help reduce dissociation rates.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Shu-wei Zhang, Zhen Pan, Li-yan Shang, Li Zhou
Summary: The study explored the kinetics and flow characteristics of carbon dioxide hydrate slurry in a high-pressure flow experimental loop, revealing the significant impact of adding PVP on hydrate induction time and the influence of various factors on particle size and pipeline blockage mechanism in a pure water system. The findings provide valuable insights into the clogging mechanism and practical management of industrial pipelines.
Article
Thermodynamics
S. Y. Misyura
Summary: Experimental studies have shown that the rate of decay of double hydrates of methane-ethane and methane-isopropanol is lower than that of methane hydrate and changes non-linearly with time. The rate of decay of sphere of double hydrate of methane-ethane is higher than that of methane gas hydrate.
JOURNAL OF ENGINEERING THERMOPHYSICS
(2022)
Article
Energy & Fuels
Zhengcai Zhang, Peter G. Kusalik, Guang-Jun Guo, Fulong Ning, Nengyou Wu
Summary: Gas hydrates, both in natural and synthesized forms, exhibit complex grain boundary structures which play a significant role in the dissociation process. The thermal stability of polycrystalline hydrates at grain boundaries is influenced by the guest types and grain boundary structures, with CH4 hydrates dissociating only above bulk melting temperature and CO2 hydrates decomposing differently. Additionally, CO2 molecules can accelerate the dissociation process by inducing gas bubble formation and preferential localization within bubbles, with dissociation initiating from the decomposition of specific cage structures.
Article
Thermodynamics
Chen Chen, Haoyu Yuan, Rongshan Bi, Na Wang, Yujiao Li, Yan He, Fei Wang
Summary: This study aims to propose a novel natural gas peak-shaving process using gas hydrates as the medium to address the supply-demand imbalance in natural gas. Through process simulation and economic analysis, the study shows that the proposed peak-shaving process can improve economic efficiency compared to traditional operational models.
Article
Engineering, Environmental
Yunseok Lee, Dongju Seo, Seungin Lee, Youngjune Park
Summary: This study reveals the dominant factors and optimized conditions for the tuning effect of gas hydrates, providing important guidance for enhancing gas storage capacity under mild formation conditions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Ronghui Sun, Zhen Fan, Kehan Li, Mingjun Yang, Yongchen Song
Summary: This study investigates the thermal stability and metastable behavior of MH-ice-gas and MH-SW-gas samples through DSC experiments and MD simulations, providing insights into the potential influences of ice and supercooled water on the metastability of MH.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
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)