Going supercritical.

different but anyway now that it was empty I shook it like I did before just for comparison, this time the beads were able to emerge easily and hit the top of the chamber as would be expected if they were totally empty. I originally chose to use these beads just because they were next to me, but they actually turned out to be very interesting when I looked at them closer, they were all full of cracks but they were also kind of shiny and some even had some color, the silica beads with the that I started were definitely not colored in any way and something strange was happening here so I could see it better.

I had to get really close and I could see that some of them would reflect different colors depending on the angle, this reminded me a lot of opal, but I doubt it's a similar mechanism that's happening here and I don't really know what's

going

on. The accounts were really broken because

supercritical

CO2 was able to arrive. on them and then vented the pressure very quickly, it could be that these cracks are so thin that they produce some weird thin film interference or something, but I'm making that up and I'm not really basing it on much. Anyway, if any of you have any idea what's

going

on here, I'd really like to know.

I also think it would be great if I could recreate this on a much larger scale, perhaps using a silica bead that is closer to the size of a golf ball, I have no idea when I will try to do this or if it is even remotely possible, but it is something I want to try eventually, but anyway that was pretty much all I wanted to do, but just one last thing, I decided to replace the pressure gauge. I bought a new one for mcmaster-carr and now I could see what pressure everything was at that time, when all the dry ice was melting the pressure on the gauge really went up and set. to about 500 psi and then when I heated it up and made it

supercritical

the pressure started to rise again and got to just over a thousand psi although it was still rising a bit and after I let it sit for about 10 minutes they ended up reaching its maximum point. 1200 after this I opened the valve and saw that the turbidity only started to form the moment the pressure dropped around a thousand psi.

This obviously wasn't something I could notice when the valve broke, but it's interesting, they meant that all this haze was probably just the two phases, liquid and gas, which could no longer mix, much of this haze was able to last until it seemed which was around 50 or 70 psi, which was around that 5 atmosphere mark below that liquid. Co2 can't exist, so all this fog, which I think was liquid co2, ended up disappearing anyway. All that being said, that was pretty much all I wanted to try. I think playing with him I got a much better idea. of how supercritical CO2 worked and what it was like and I felt much more comfortable using it to make aerogels, the chamber also worked super well and didn't explode or kill me, so again a big thanks to Ben for letting me use it when I started this little project.

I wanted to try using the camera to make airgel and also extract caffeine from coffee, but I found that neither of those things would really work. Both of these things require much higher pressures and much longer soaking times. and the o-ring that is on the chamber just couldn't handle it to do any of these things. You would have to build a suitable chamber using stainless steel and all high pressure fittings. This video was filmed more than six months ago. And in the meantime, I put together the right camera. I also used it to make airgel and will eventually post a full video about it on my main channel.

Niall Rad. I'm also thinking about using that camera. making decaffeinated coffee or making that large scale colored silica bead I mentioned before either way, although I have no plans to do any of those things right now, but they'll probably be finished eventually as well as a last point. Some of you may be wondering why this video was on Niall Blue and not the main Niall Red channel and it's because I didn't really feel like it fit there. I recently decided I wanted to dedicate to Niall Red, too big and weird. projects like making moonshine out of toilet paper or diamond water and this wasn't something that really matched that.

However, I had already filmed it all and there was no point in wasting it because I had a lot of fun with this project and there is a lot of good information in it, so I decided to post it here on Niall Blue. It's a bit strange though because the amount of work that went into making it all happen was about the same as a Niall Red video, but that's the way it always is. A great message to all my followers on Patreon. Everyone who supports me can watch my videos at least 24 hours before posting them on YouTube.

Also, everyone on Patreon can message me directly and support me with five dollars or more. get your name at the end like you see here