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Muromachi Lab
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The lab explores the properties and uses of gas hydrates.

AboutAbout the lab
Studying the properties of hydrates and applying them to gas separation and heat storage.
The Muromachi Lab studies the properties of hydrates, which are water-containing crystals, and their use in gas separation, gas storage, heat storage, and more.
Its listed research keywords include methane hydrate, gas hydrate, semi-clathrate hydrate, thermophysical properties of fluids, and crystal structure analysis.
In a 2019 commentary article, a faculty member of the lab stated that because gas hydrates form from pure water, they can be used for desalination and for concentrating aqueous solutions, and can also separate components from mixed gases.
Key terms
- Gas hydrate
- A crystal formed by water that takes in gas and stores it. Because it forms from pure water, it can also be used for desalination and concentration.
- Semi-clathrate hydrate
- A crystal made from water and a large ionic substance. It has the property of enclosing gas.
- Phase equilibrium
- The temperature and pressure conditions under which three phases, gas, hydrate, and aqueous solution, coexist in balance
ResearchResearch themes
The lab investigates the formation conditions and crystal structures of gas hydrates and of semi-clathrate hydrates, which are made of water and ionic substances. Building on this, it works on research that leads to applications such as gas separation and heat storage.
*Illustrative imagePhase equilibria of semi-clathrates
The lab measures the conditions under which semi-clathrate hydrates made from asymmetric quaternary ammonium salts coexist with gas or liquid, under pressures of methane, carbon dioxide, and nitrogen.
*Illustrative imageCrystal structure of hydrates
The lab determined the crystal structure of the hydrate formed from a substance called TBAB, using synchrotron radiation. A co-authored paper reports that this solved a structural mystery that had stood for 80 years.
*Illustrative imageApplications to gas separation, gas storage, and heat storage
The lab works on using the property of gas hydrates to selectively take in gases for gas separation and storage. For gas-trapping agents and heat storage materials, lab members are listed as inventors on a patent filed by the National Institute of Advanced Industrial Science and Technology (AIST).
*Illustrative imageSubstances that suppress methane hydrate formation
When gas is produced from methane hydrate on the seafloor, inhibition technology is needed to keep hydrates from blocking pipelines. The lab investigates how small alkylammonium salts suppress hydrate formation, through phase equilibrium measurements.
MembersFaculty
- Associate ProfessorSanehiro Muromachi
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Gas hydrate from Indian Ocean” USGS / Public domain (cropped)
- Phase equilibria of semi-clathrates: “Clathrate hydrate sII” Andrzej Falenty / CC BY-SA 3.0 (cropped)
- Crystal structure of hydrates: “Methane hydrate on a red background” WorldAI / CC BY 4.0 (cropped)
- Applications to gas separation, gas storage, and heat storage: “Bundle of compressed gas bottles” Ildar Sagdejev (Specious) / CC BY-SA 4.0 (cropped)
- Substances that suppress methane hydrate formation: “Burning methane hydrate” USGS / Public domain (cropped)
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