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Solvent Element Technology Lab
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The lab measures the properties of supercritical fluids to put environmentally friendly solvents to practical use.
AboutAbout the lab
Supercritical fluids, a new kind of solvent
The Solvent Element Technology Lab studies environmentally friendly solvents, focusing on supercritical and subcritical fluids of carbon dioxide and water.
The lab regards these two substances as the most thermodynamically stable, abundant in everyday life, and capable of addressing global environmental problems at their root.
The lab actually measures fundamental physical properties at high temperatures and pressures, while also advancing estimation from theory.
It aims to return practical technologies using environmental solvents to society.
Key terms
- Supercritical fluid
- A substance whose temperature and pressure are above its critical point. It behaves somewhere between a gas and a liquid
- Solubility parameter
- A numerical guide showing how readily a substance dissolves in a given solvent
- Supercritical extraction
- A method that uses a supercritical fluid as the solvent to extract only the target components
NewsLab news
Started anew as the Solution Properties Engineering Lab
Published a textbook through Tohoku University Press
ResearchResearch themes
Focusing on supercritical and subcritical fluids of carbon dioxide and water, the lab aims to turn environmentally friendly solvents into technologies that can actually be used. It advances both techniques for measuring fundamental properties at high temperatures and pressures and methods for estimating them from theory, and links this work to building extraction and separation/purification processes.
*Illustrative imageMeasuring Fundamental Properties at High Pressure
Fundamental thermodynamic data such as phase diagrams, density, and solid solubility at high temperatures and pressures, including the supercritical region, are essential when designing chemical engineering processes. The lab develops techniques to measure these directly in high-temperature, high-pressure fluids, and also studies theoretical estimation using equations of state and activity coefficient models.
*Illustrative imageEntropy-Based Solubility Parameter
Using the entropy-based solubility parameter (eSP), which the lab developed independently in 2016, the lab evaluates the performance of high-pressure solvents based on how much of a solid dissolves. It conducts fundamental research toward making full use of green solvents that can replace highly toxic organic solvents.
*Illustrative imageExtracting, Separating, and Purifying at High Pressure
Using supercritical fluid chromatography, which has been developed since the early 1960s, supercritical extraction equipment, which spread from the late 1970s, and a benchtop subcritical separation apparatus that the lab developed independently in 2012, the lab advances research and development through both experiments and theory.
MembersFaculty
The members of the Solvent Element Technology Lab are faculty, research collaborators, technical assistants, and doctoral, master's, and undergraduate students.As of 2025
- Associate ProfessorMasaki Ota
- Project ProfessorHiroshi Inomata
VoicesStudent voices
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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: “Water drop 001” José Manuel Suárez from Spain / CC BY 2.0 (cropped)
- Measuring Fundamental Properties at High Pressure: “Carbon dioxide 3D spacefill” Jynto (talk) / CC0 (cropped)
- Entropy-Based Solubility Parameter: “Critical carbon dioxide-3” Bernhard Kuemel, derivative work: Regi51 / CC BY-SA 2.0 at (cropped)
- Extracting, Separating, and Purifying at High Pressure: “Hop cones in Seleus farm Romania” Liana.salanta / CC BY-SA 4.0 (cropped)
- Related lab (Tomai Lab): “Critical carbon dioxide-3” Bernhard Kuemel、Regi51 / CC BY-SA 2.0 at (cropped)
- Related lab (Watanabe Lab (System Development Division)): “Zinc hydroxycarbonate jungle” Arskatin / CC BY 4.0 (cropped)
- Related lab (Tomishige Lab): “Dry Raney nickel” en:User:Rune.welsh / CC BY-SA 3.0 (cropped)
- Related lab (Yoshioka Lab): “FLAKES” TOP PLASTIC / CC BY-SA 4.0 (cropped)
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