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Author: Subject: What is needed to store synthesised gasses in gas cylinders
Monoamine
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[*] posted on 25-8-2023 at 21:57
What is needed to store synthesised gasses in gas cylinders


I'm planning to make some MeCl, for a future experiment. The problem is that MeCl is a gas above -24.2 C.

So in order to store it, I will need to get it into a gas cylinder.

But I'm not sure on how to do this this, since it would require some way of pressurizing the gas into the cylinder.

My best guess is to connect an air-compressor to the glassware in which I'll be generating the MeCl, and then connecting the compressor to the gas cylinder.

Has anyone tried this before? Are there any other ways of doing this?
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Tsjerk
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[*] posted on 25-8-2023 at 22:03


Condense it with dry ice, there is no need to pressurize it, it will do so by itself. Have a look at the YouTube videos of Thy Labs.
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[*] posted on 13-9-2023 at 05:53


If you have a suitable container with a outlet and inlet valve (that can handle the pressures) maybe you can just fill it up with liquid MeCl and close it.
This must be done at below -24.2°C obviously and when the temps rise to roomtemp the MeCl will pressurize the container and then can be used as a gas cylinder.
Make sure the container is capable of the developed pressure or you will have MeCl leaking or even worse.
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Rainwater
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[*] posted on 13-9-2023 at 14:39


I strongly advise against using a one time use propane can refiller value, even if the fittings are standard 1/4 ntp 250 psi rated and come apart reasonably well, the one time use tanks made of stretched steel designed for +500psi failure, with a 250 psi schrader pressure relief valve, are designed and manufactured at great expense so they can be filled with pennies worth of product and discarded as all things should be.
Check chemical compatibility with 4130 steel alloy 

[Edited on 13-9-2023 by Rainwater]




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Dr.Bob
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[*] posted on 30-11-2023 at 19:10


When I worked with Ed, he made many gases, and always condensed them into cylinders via dry ice cooling, and then screwed the valve into them to seal them. That worked for freons, halons, and many fluorocarbons. The short stout cylinders that aldrich uses for its gases/reactives are quite good, and work well. The long thin ones are much harder to work with (like what they ship CO, HCl, and ethylene in).
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[*] posted on 3-1-2024 at 01:54


A 3500 psig recip micro compressor?
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[*] posted on 10-4-2024 at 03:59


There are videos of storing various gases in diffenent cylinders on youtube.
I dont have exact videoadress but you can probably find them if searching.
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[*] posted on 11-4-2024 at 13:37


The guy in this YT video makes hydrogen and stores it under pressure in tanks.
Seems like he uses a simple refrigerator compressor to compress the hydrogen.
Look at this video and he has other videos as well.

Automated Hydrogen Generator
https://www.youtube.com/watch?v=oIWgzVaGn4Y
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[*] posted on 11-4-2024 at 15:07


That guy is asking to be blown up! Hydrogen is no joke, and a "simple refrigerator compressor" certainly wouldn't be rated to handle it. (Hydrogen embrittlement would be one of many concerns.)



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Rainwater
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[*] posted on 11-4-2024 at 18:34


He seams to know what he's doing when it comes to the engineering side of it. As for safty, well playing with liquid methane isnt really the dumbest thing ive seen, but its high on the list. You should see what he packs in his lunch box.



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