Instructables

Large High Pressure Storage Tanks?

I am looking into a green power system but, I would need 4500 psi hydrogen tanks.  They are way to small to be practical, even the large 144 c.f. ones (biggest I could find).  Is there anything special about hydrogen storage tanks, or will any 4500 psi tank work, and does anyone know were to get big ones, like huge.  If not, any ideas on how to fab one.  I know a guy who is high pressure certified so he could weld it, but what thickness of metal is needed for say a 12" diameter tank about 10-15' foot long. (yea, that big)

A while back I acquired a copy a DVD somewhat cryptically titled "Hydrogen Car and Multifuel", produced by a company called knowledgepublications.com. Together with this DVD I got a list of "sources" for various hardware for storing and plumbing high-pressure hydrogen. The text of this "sources" list is attached below.
jj.inc (author)  Jack A Lopez3 years ago
Thanks man this is so what I was looking for, the Lincoln Composites one is huge, I haven't gotten a chance to see the others yet. SWEET!!! and made for hydrogen too.
sdorozenski3 years ago
I have helium cylinders each rated at 3600 psi Max Working Pressure. They have been tested at 5000+ psi. The tanks were previously in helium service but can be utilized for oyygen, nitrogen or any type of intert gas. With special permitting, they can be used for hydrogen and practically any non corrosive gas or liquid. The vessels have a wall thickness of 1.0 inches and weigh 5500 pounds each.

The tanks are not ASME certified, but they are DOT and/or CCI certified. All of the pertainent specification information is stamped into the head of each tank. They measure 18 inches diameter by 33 feet overall length.

$4,000 per tank.

If your interested contact me at hopperenergysystems&gmail.com

Steve
jj.inc (author)  sdorozenski3 years ago
Hmmm... If only I had 4000 dollars. Anyway those sound great, where, by chance, did you get them. I don't need any certification for the stationary tanks, they would be underground in a concrete room anyway. No pressure in them at all if a person is in the room with them. Thanks for your input.
iceng3 years ago

No one mentioned hydrogen gas leaks out of any container.
jj.inc (author)  iceng3 years ago
So, how is this relevant?
iceng jj.inc3 years ago

One cannot store gaseous Hydrogen (especially under pressure) as potential energy like a gasoline can for weeks of standby time without loosing a substantial amount of it. Hydrogen is a single proton and one electron and slips out between aluminum and steel like sand from your hand.

To hold Hydrogen, requires a reversible chemical process, liquefaction or a gravity well. This adds to cost of using it as a fuel.
jj.inc (author)  iceng3 years ago
What about composite tanks?
Vyger3 years ago
Hydrogen is super explosive. You would probably need a special permit to have anything more than a small tank in a residential neighborhood. And that more than likely will involve specifications that have to be met and inspections to make sure you comply with them. Something that has been a bottleneck to hydrogen powered cars is the volatility of the fuel. It blows up way easier than gasoline and since its an orderless gas it can be leaking and you won't even be able to tell. Really, if something goes wrong you don't want to leave a crater where your neighbors used to be.
jj.inc (author)  Vyger3 years ago
Yes, I know. If there is a hydrogen leak though it isn't a big deal. It just floats away.
. "isn't a big deal" ROFLMAO You are one funny guy, jj. Say "hi" to The Maker for me when you see him (soon).
jj.inc (author)  NachoMahma3 years ago
It won't explode in this style, it must be in a containment area mixed with oxygen to do any damage. Basically here is what would happen if a hydrogen tank leaked in a building, it would float up and out of vents in the roof and if it caught fire you would have a large fire ball and a little tiny torch at the leak point. In a car it would float up into the air and in worst case scenario you have a flame thrower, but not an explosion. To blow something like this up you would have to leave it sitting on a fire for an hour, and even then a water heater or even a scuba tank would explode.
It needs a teeny amount of hydrogen to be explosive though.
Hydrogen isn't super-explosive, but it becomes so when mixed with oxygen.

The requisite amount to reach the lower explosive limit is pretty small though 4%, AFAIR.

Methane, butane and propane are also odorless gases. The smell is added in production. Presumably, if we get hydrogen fuelled vehicles, we'll get smelly hydrogen too.

Steve
Actually you have to add an oxidizer to anything before it becomes flammable or explosive. Technically you are correct but in common speak things are said to be explosive on their own.
Take steal wool and add some oxygen and light it and its a pretty amazing reaction but steal is not thought of as being flammable. Gasoline the liquid doesn't burn, its the vapors mixed with air that is explosive.
Problem with Hydrogen is that it mixes with its oxidizer (oxygen) easier because its already a gas.
Bottom line is Hydrogen really really likes to be water which is why it can be a great energy source but also pretty dangerous.
There are materials that deflagrate - "explode", and require no oxygen to do so - acetylene is one AFAIR
jj.inc (author)  steveastrouk3 years ago
Actually it still needs oxygen, things that burn or explode without oxygen the gas still have it built in, like sugar KNO3 rockets, KNO3 has "O3." It is still extremely explosive when exposed to oxygen, we have Oxy-Acetylene torches here on the farm and they are pretty darn hot.
Actually, No, it doesn't. Acetylene, C2H2, contains NO oxygen, but will deflagrate.
jj.inc (author)  Vyger3 years ago
Although it can't be too bad because, we have a store full of Acetylene in the middle of town which is so volatile it can be stored at a max of about 400 psi while hydrogen still can be found in much larger and higher pressure tanks.
Acetlyene can be VERY nasty. Look up what happens if you shock the bottle.
aelias36 Vyger3 years ago
1)

BWAHHAHAHAHA LOLOLOL

2)

Erm, yeah, he's pretty right. Make sure to check up on the laws in you're area before you start this project of yours.
lemonie3 years ago

You need a lot of small tanks, bigger = much more difficult.

L