General > General Technical Chat
heres a gas pressure vessel can i get some advice.
Capernicus:
https://www.ebay.com.au/itm/294264768696?chn=ps&_ul=AU&norover=1&mkevt=1&mkrid=705-139619-5960-0&mkcid=2&itemid=294264768696&targetid=309727335774&device=c&mktype=pla&googleloc=9070552&poi=&campaignid=1669056926&mkgroupid=67513082834&rlsatarget=pla-309727335774&abcId=1123846&merchantid=119156995&gclid=CjwKCAiAvaGRBhBlEiwAiY-yMDpoKYB-EGJQgDzgFYp5-_z-s1RTHSYFSjfLYNfHlYc7dxvjyYn-WxoCZuIQAvD_BwE
So this pressure vessel looks ok. but I'm not sure what I'm doing, I'm not sure how much pressure this thing can take.
Maybe if It comes with a psi-dial I guess keep below the max on it.
I'm planning on putting pure oxygen in it, (Using electrolysis and a high psi low volume pump to get it in, into a rated diode.) Only slowly over time, using baking soda as the electrolyte, and out-piping the hydrogen cause I don't need it, I figure lightning will hit it and it'll turn back into water again. good old nature.
Im going to convert it into a multi-compartment system, with cement and plastic bottles (because it could possibly have a strong base in it -according to a theory- that could react to the metal, so I figure plastic and cement to fill up the gaps inside gets over the problem.)
Thats if my theory is correct anyway about dissolving oxygen at high pressure with water creates a strong base, whilst the oxygen in inside it, and kept at icy cold temperature. (look up Henry's law.) Its a diacidic base. at 2000 psi i think it only counts as 90% diluted only, so the material will probably be hydrous only, not anhydrous, and I probably wont even reach that pressure, depends on what its all rated at when it gets to me.
Its because I want to put magnesium oxide in solution, to cement it together from powder. (Ceramic-ware)
I want to make things like ceramic scissors and other apparatus, maybe even cooking ware, but that will only work if it doesnt come out too hydroxidey, or when heat hits it, it might break apart in powder, when it loses its water bonds. If its not affected by the water too much, itll take more thermal torture before it breaks, like concrete kilns do. But maybe thats a bit too much to ask, and its not thermal ceramic.
Instead of using acid, I put it with high pressurized gas and water instead, but its a similar thing. it puts the rock in a softer state so it melds together. Its like scintering, except I do it at 2 degrees instead of 500 degrees, because the gas pressure should push it together, so the base acts on it, it goes soft, then it gets 1000 psi of pressure (or whatever I manage to get.) compacting it together pneumaticly.
I need it multicompartment, because i need the water to travel out of the "mud slurry" in the mould, and drip into a condenser, I plan on doing it with vibration evapouration.
Ill probably just put in the refridgerator (cold gets the gas more dissolved for the same pressure, squared just about, cause of thermo-dynamics), if I can make some space for it, and just sit it in there and see if the mag-o crystalizes, with the oxygen bombarding it.
So, any one have any advice? Or am I completely insane.
TimFox:
In chemistry labs, such vessels are often called "bombs", which is a hint about safety. This one looks something like an old-fashioned kitchen "pressure cooker", which usually hold about 2 atmospheres pressure, nowhere near 1000 psig.
Of course, the vendor doesn't specify the pressure and the gauge is illegible. What kind of seal (gasket, whatever) is below the top?
Even the kitchen units occasionally explode, so I will not give practical advice on this unit.
Capernicus:
Thanks.
I can actually make one myself out of cement. I wonder how thick it needs to be, and how much steel reinforcement bars help.
So I need a rubber gasket for it! - then maybe I can strap it down with some 1 tonne buckle straps.
bill_c:
Please don't do this! :scared:
You can rent oxygen tanks at welding supply places. These tanks are heavy forged steel.
Oxygen service has special requirements. Just about anything in contact with the oxygen is seen as fuel. Things like excessive velocity, oil contamination, and plastic, can set it off. Do way more research before attempting such, even with approved tanks, piping, and controls.
Also, cement (or concrete) does not have any tensile strength, so it is not suitable for any pressure tank.
Capernicus:
I bet cement can take some pressure, its thick rock, But If I just use it as filler for inside a pressure capsule I buy, it only needs compressive strength to be ok. (because its sandwiched between the inner membrane (plastic bottle) and the wall.
So... with the oxygen, yeh I dont know what I'm doing at all.
I heard u can actually light a cigarette on contact to liquid oxygen, but I need something powerful otherwise the mineral isnt going to "glue". What I think im getting (which is a pretty loose theory) is something like liquid oxygen but at 90% dilution of that.
Is that still dangerous? And will plastic linings still work? I'm not sure, but plastic is unaffected by pure sodium hydroxide, so I think it should be ok to handle compressed oxygen and water vapour mix.
Yep. more research is in order.
And I may just do a little 100 psi version with just pepsi bottles in the refridgerator ... before I go hardcore straight away.
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