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
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
Astronomy & Astrophysics
Elodie Gloesener, Ozgur Karatekin, Veronique Dehant
Summary: The study investigated the distribution and stability depth of CH4-rich clathrate hydrates in the Martian soil, finding that they are shallower in high latitude regions and deeper at the equator. Factors influencing the stability of clathrates were considered, such as gas phase composition and presence of brines.
Article
Chemistry, Physical
Peng Wang, Jun Wang, Ke Xu, Yanwen Lin, Qiao Shi, Tong Li, Yuequn Fu, Zhisen Zhang, Jianyang Wu
Summary: This study investigates the structure and stability of clathrate hydrates encapsulating fluorinated methane derivatives under mechanical load through molecular dynamics simulations. The study finds distinct structural and mechanical behaviors among different clathrate hydrates, and the lattice constant of clathrate hydrates is influenced by the size and dipole moment of the encapsulated fluorinated methane.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Dong Woo Kang, Wonhyeong Lee, Yun-Ho Ahn, Jae W. Lee
Summary: The study investigated the use of confined tetrahydrofuran (THF) solution in a superabsorbent polymer for developing a reusable gas storage system based on hydrates. It was found that the THF-absorbed SAP could effectively initiate the nucleation and growth of hydrates, maintaining formation behavior over multiple cycles. Despite a slight decrease in methane storage capacity over cycles due to volatile THF loss, a tuning phenomenon occurred leading to a constant storage capacity, confirmed through spectroscopic analysis.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Mechanical
Jinjie Liu, Ke Xu, Li Yang, Yanwen Lin, Tong Li, Xuezheng Gao, Zhisen Zhang, Jianyang Wu
Summary: This study used classic molecular dynamic simulations to investigate the fracture mechanics of three main methane clathrate hydrates, revealing different mechanical properties among them and degradation caused by nanocracks. Additionally, tip amorphization during crack propagation process was observed in the three methane clathrate hydrates.
ACTA MECHANICA SINICA
(2021)
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
Chemistry, Multidisciplinary
Feng Zhang, Hao Ni, Yi Wang, Fujun Xia, Baojun Wei, Xuefeng Liu
Summary: By using classical molecular dynamics simulations, the mechanical stability of CO2-N2 heteroclathrate hydrates (CNHHs) under uniaxial loading was investigated. The ratio of CO2 to N2 in the large and small water cages was found to have a crucial effect on the mechanical properties and fracture behaviors of CNHHs. The occupancy of small cages by CO2 was identified as a decisive factor affecting fracture position, leading to brittle or ductile fracture behavior. These findings provide insights into the deformation and fracture mechanisms of heteroclathrate hydrates and the impact of CO2 sequestration on the stability of gas hydrate reservoirs.
CRYSTAL GROWTH & DESIGN
(2023)
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
Jiwoong Seol
Summary: The addition of propylene oxide (PO) and epoxyisobutane (EIB) significantly improves the thermodynamic stability of methane hydrates and enhances methane storage capacity. The microstructures of the methane hydrates containing both PO and EIB were identified as the sII type, showing stability even at ambient temperature and mild pressure. Both PO and EIB act as powerful promoters with good water miscibility, offering potential for sustainable and energy-efficient methane storage technologies.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Astronomy & Astrophysics
Elise W. Knutsen, Geronimo L. Villanueva, Giuliano Liuzzi, Matteo M. J. Crismani, Michael J. Mumma, Michael D. Smith, Ann Carine Vandaele, Shohei Aoki, Ian R. Thomas, Frank Daerden, Sebastien Viscardy, Justin T. Erwin, Loic Trompet, Lori Neary, Bojan Ristic, Miguel Angel Lopez-Valverde, Jose Juan Lopez-Moreno, Manish R. Patel, Ozgur Karatekin, Giancarlo Bellucci
Summary: A comprehensive search for hydrocarbons in the Martian atmosphere conducted by the ExoMars Trace Gas Orbiter/NOMAD instrument from April 2018 to April 2019 did not yield any significant detections of organics, setting new stringent upper limits for global ethane and ethylene at 0.1 ppbv and 0.7 ppbv, respectively. No global background level of methane was observed, with an upper limit of 0.06 ppbv, in agreement with earlier findings. Dedicated searches for localized plumes at over 2000 locations also provided no positive detections, suggesting that methane release events, if they occur, are likely sporadic.
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
Astronomy & Astrophysics
J. L. Grenfell, F. Wunderlich, M. Sinnhuber, K. Herbst, R. Lehmann, M. Scheucher, S. Gebauer, G. Arnold, H. Rauer
Summary: It is currently uncertain whether methane exists on Mars and its lifetime is not fully understood. Research suggests that known processes can only explain a sixteen-fold decrease in methane lifetime, indicating the need for additional unknown processes to explain the observed lifetime.
Article
Astronomy & Astrophysics
Ronald W. Klusman, Yangcheng Luo, Pin Chen, Yuk L. Yung, Sindhoora Tallapragada
Summary: Measurements from the Curiosity rover's SAM-TLS instrument indicate that atmospheric methane on Mars exhibits seasonality with bimodal peaks in concentration. This study investigates the modulation mechanism behind the observed seasonal variations and proposes that barometric pumping and adsorption/desorption processes driven by atmospheric pressure and temperature changes can explain these variations. The study also presents a comprehensive flow chart for modeling methane microseepage on Mars.
Article
Thermodynamics
Sanehiro Muromachi, Kiyofumi Suzuki, Norio Tenma
Summary: This study reports phase equilibrium data for urea + methane + water and urea + carbon dioxide + water systems, and finds that urea can be used as a thermodynamic hydrate inhibitor in subsea methane hydrate systems. The inhibition effect of urea is slightly weaker than that of methanol, but it can reach applicable hydrate inhibition temperatures under specific conditions. Based on the present equilibrium data and seafloor conditions, urea can be used for methane gas production and hydrate-based carbon capture and storage systems.
FLUID PHASE EQUILIBRIA
(2023)