A supercritical fluid (SCF) is any substance at a temperature and pressure above its critical point, where distinct liquid and gas phases do not exist, but below the pressure required to compress it into a solid. It can effuse through porous solids like a gas, overcoming the mass transfer limitations that slow liquid transport through such materials. SCF are much superior to gases in their ability to dissolve materials like liquids or solids. Also, near the critical point, small changes in pressure or temperature result in large changes in density, allowing many properties of a supercritical fluid to be "fine-tuned". Supercritical fluids occur in the atmospheres of the gas giants Jupiter and Saturn, the terrestrial planet Venus, and probably in those of the ice giants Uranus and Neptune. Supercritical water is found on Earth, such as the water issuing from black smokers, a type of underwater hydrothermal vent. They are used as a substitute for organic solvents in a range of industrial and laboratory processes. Carbon dioxide and water are the most commonly used supercritical fluids; they are often used for decaffeination and power generation, respectively. An interesting property is that some substances are soluble in the supercritical state of a solvent (e.g. carbon dioxide) but insoluble in the gaseous or liquid state—or vice versa. This can be used to extract a substance and transport it elsewhere in solution before depositing it in the desired place by simply allowing or inducing a phase transition in the solvent. (Wikipedia).
A close look at supercritical carbon dioxide CO2
I built a pressure vessel from aluminum and acrylic, and filled it by placing pieces of dry ice inside. The dry ice melts under high pressure, and forms a liquid and gas phase. When the vessel is heated, the CO2 becomes supercritical -- meaning the liquid and gas phases merge together in
From playlist Chemistry and Materials
Is it a liquid? Is it a gas? Professor Martyn Poliakoff demonstrates supercritical fluids in his office at the University of Nottingham. More with Professor Poliakoff at http://www.test-tube.org.uk/
From playlist Martyn Poliakoff
Show Me Some Science! Can Crush
A metal can and a hose are filled with water, and the hose is lowered off of a second floor balcony. The water drains and the can is crushed! In a fluid, like air or water, the pressure is always greater on the bottom than on the top. This is because the weight of all of the fluid pushes
From playlist Show Me Some Science!
How to compare turbocharger with supercharger. ✔
More details visit: http://www.techtrixinfo.com/ Comparison of Turbocharger and Supercharger. Related topics: Technical explained working of explanation repair maintenance automobile engineering mechanical details on cars vehicles technology technical the best worlds best perfect well ve
From playlist Turbochargers/ Superchargers
Supercritical Planets Discovery - Gas and Liquid At the Same Time
You can buy Universe Sandbox 2 here: http://amzn.to/2yJqwU6 Or get a shirt: https://teespring.com/stores/whatdamath Hello and welcome! My name is Anton and in this video, we will talk about new analysis that suggests some planets like K2-18b might be an unusual class of planets known as
From playlist Unusual Exoplanets
As this sample is heated, the "boundary" between liquid and gas is blurred, until it becomes a supercritical fluid. This video was provided by Professor Martyn Poliakoff. He explains all this in more detail at http://www.youtube.com/watch?v=yBRdBrnIlTQ
From playlist Martyn Poliakoff
Supercritical fluids, a state between Liquid and Gas
Why does water freeze at 0°C? What happens if we heat it to very high temperatures? What are the practical applications of such an experiment? All these answers in 12 minutes! This video is narrated by Octave Masson. For more videos, subscribe to the YouTube channel : https://www.youtube.
From playlist Matter and Energy
T-Shirts: https://nilered.tv/store ------------------------------------------- For a while now, I've wanted to make aerogel, but for that, I needed to use supercritical CO2. I didn't really know what that was though, and I figured the best way to learn about it was to make it myself. Che
From playlist Projects
Making Nanoparticles in Supercritical Water
Professor Ed Lester discusses a novel way to produce nanoparticles on an industrial scale. The University of Nottingham academic has started a company called Promethean Particles. More science at http://www.test-tube.org.uk/
From playlist Ed Lester & Nanoparticles
Martyn Poliakoff: the elements of chemistry | The Royal Society
Join Professor Sir Martyn Poliakoff for a whirlwind tour of the periodic table, elements that have played an important role in his scientific career and have led him to champion greener more sustainable ways of making the chemicals which we all need to maintain our quality of life. Sir Ma
From playlist Latest talks and lectures
More details visit: http://www.techtrixinfo.com/ Supercharger Explained. Superchargers are used in automobile to improve or enhance the HP (horse power) of an engine. As we all know, a bigger engines is capable of producing more power compared to smaller one, this is as the bigger engine
From playlist Turbochargers/ Superchargers
Engineers need to be able to predict how water will behave in order to design structures that manage or control it. And fluids don’t always behave the way you’d expect. On this episode of Practical Engineering, we’re talking about one of the most interesting phenomena in open-channel flow:
From playlist Civil Engineering
Energy, momentum specific force
Advanced Hydraulics by Dr. Suresh A Kartha,Department of Civil Engineering,IIT Guwahati.For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist IIT Guwahati: Advanced Hydraulics | CosmoLearning.org Civil Engineering
Absolute Pressure vs Gauge Pressure - Fluid Mechanics - Physics Problems
This physics video tutorial provides a basic introduction into absolute pressure and gauge pressure. The gauge pressure is the difference between the absolute pressure and the atmospheric pressure. A positive gauge pressure means the absolute pressure is above the atmospheric pressure.
From playlist New Physics Video Playlist
I followed instructions in the silica TMOS recipe from http://www.aerogel.org and successfully produced some small pieces of aerogel in my home shop. The two main difficulties are: 1. Getting TMOS or TEOS (the key chemical ingredient), and 2. Building a supercritical drying chamber.
From playlist Chemistry and Materials
Show Me Some Science! Low Temperature Boiling
We've all seen boiling water before. Boiling occurs when a liquid evaporates (changes phase into a gas), and bubbles through the rest of the liquid. When water boils, the bubbles you see are water vapor, which is also called steam. We all know that water boils at about 100 Celsius, but Nit
From playlist Show Me Some Science!
Phase Diagrams of Water & CO2 Explained - Chemistry - Melting, Boiling & Critical Point
This chemistry video tutorial explains the concepts behind the phase diagram of CO2 / Carbon Dioxide and the phase diagram of water / H2O. This video contains plenty of examples and practice problems: Chemistry Textbook: https://amzn.to/30wWZOH My Website: https://www.video-tutor.net P
From playlist New Physics Video Playlist
Supercritical drying chamber for aerogel production
I built a pressure chamber from 2" pipe fittings and 1/8" brass valves to contain supercritical CO2 for drying applications. One project is to try aerogel production which generally requires that solvent be removed via supercritical drying. Normal evaporation would deform the aerogel stru
From playlist Chemistry and Materials