Supercritical CO2 is heavy like a liquid, with weird and useful properties
1–10 of 57 posts
Re: Supercritical CO2 is heavy like a liquid, with weird and useful properties
#2It seems like this link from the article deserves its own front page story:
https://www.ge.com/reports/call-ecomagination-ge-building-co...
That's pretty neat.
Re: Supercritical CO2 is heavy like a liquid, with weird and useful properties
#3Couldn't comment to the author without paying for an account there, but as someone who has actually built sCO2 reactors -- you can get away with a much lower cost HPLC pump to pressurize the CO2 if you can force it to be a liquid at the inlet side using an eductor tube and slightly heating the tank to guarantee that the slightly cooler HPLC pump head won't cavitate.
It worked pretty well, though I had to stick a TEC on the pump head. $5k instead of $100k+ for a high pressure syringe pump.
My application was to use the sCO2 to solubilize organometallic precursors to deposit thin films on particles in a fluidized bed, and one of the best reasons for sCO2 was that the only likely contamination would be carbon (sCO2 is sometimes used to form carbides intentionally).
Re: Supercritical CO2 is heavy like a liquid, with weird and useful properties
#4Applied Science has a great video (as all of his videos are) on supercritical CO2.
Re: Supercritical CO2 is heavy like a liquid, with weird and useful properties
#5Some molten salt reactor designs were planned first with helium turbomachinery and later with supercritical CO2.
Also GE tried to sell gas turbines for ship propulsion. You get back some efficiency with a CO2 turbine running with the waste heat. Ship owners still like their diesels. Really long time between overhauls.
Re: Supercritical CO2 is heavy like a liquid, with weird and useful properties
#6It's amazing how wide the applications of supercitical CO2 can be -- we used it as a solvent to extract high-value lipids from algal biomass at a biofuel company I worked for:
https://en.wikipedia.org/wiki/Supercritical_fluid_extraction
But it can also be used as a 'solvent' in non-toxic and low/no-water laundry systems:
http://e3tnw.org/ItemDetail.aspx?id=512
In addition to all of the benefits it can provide for energy-related pursuits as a working fluid.
Re: Supercritical CO2 is heavy like a liquid, with weird and useful properties
#7It's amazing how wide the applications of supercitical CO2 can be -- we used it as a solvent to extract high-value lipids from algal biomass at a biofuel company I worked for: https://en.wikipedia.org/wiki/Supercritical_fluid_extraction But it can also be used as a 'solvent' in non-toxic and low/no-water laundry systems: http://e3tnw.org/ItemDetail.aspx?id=512 In addition to all of the benefits it can provide for ene…
It's also being used as a solvent to make high quality cannabis concentrates and extracts in place of butane or alcohol that's more commonly used now. I haven't tried them, but I know the CO2 extracted products are being used more in edibles as toxic solvents aren't used in the extraction process.
Re: Supercritical CO2 is heavy like a liquid, with weird and useful properties
#8Couldn't comment to the author without paying for an account there, but as someone who has actually built sCO2 reactors -- you can get away with a much lower cost HPLC pump to pressurize the CO2 if you can force it to be a liquid at the inlet side using an eductor tube and slightly heating the tank to guarantee that the slightly cooler HPLC pump head won't cavitate. It worked pretty well, though I had to stick a TEC…
>My application was to use the sCO2 to solubilize organometallic precursors to deposit thin films on particles in a fluidized bed, and one of the best reasons for sCO2 was that the only likely contamination would be carbon (sCO2 is sometimes used to form carbides intentionally).
I understand some of these words.
Kidding aside, what was the goal of this endeavor? What is the end product?
Re: Supercritical CO2 is heavy like a liquid, with weird and useful properties
#9It's amazing how wide the applications of supercitical CO2 can be -- we used it as a solvent to extract high-value lipids from algal biomass at a biofuel company I worked for: https://en.wikipedia.org/wiki/Supercritical_fluid_extraction But it can also be used as a 'solvent' in non-toxic and low/no-water laundry systems: http://e3tnw.org/ItemDetail.aspx?id=512 In addition to all of the benefits it can provide for ene…
Super critical co2 is also used for caffeine extraction in coffee, and its safer solvent for cannabis extracts and concentrates. I would never buy cbd products unless they are lab tested with a GC for contaminates and extracted with co2.
Re: Supercritical CO2 is heavy like a liquid, with weird and useful properties
#10It's amazing how wide the applications of supercitical CO2 can be -- we used it as a solvent to extract high-value lipids from algal biomass at a biofuel company I worked for: https://en.wikipedia.org/wiki/Supercritical_fluid_extraction But it can also be used as a 'solvent' in non-toxic and low/no-water laundry systems: http://e3tnw.org/ItemDetail.aspx?id=512 In addition to all of the benefits it can provide for ene…
CO2 is also the best substance to inject into oil fields for enhanced oil recovery. It becomes supercritical at the pressures involved in the oil bearing formations and is more effective at sweeping recoverable petroleum than water or steam. The problem is sourcing enough CO2 near a field.