Liquefaction temperatures of gases.

[Redneck in training]

gases dont boil

Of course they do boil when changing from liquid to gas vapor. Then at higher temperatures they are superheated (Way above their boiling point). In example air is a mixture of superheated gases.

 

[Redneck in training]

I don't have a pressure chart for the gas. Do you know of one? Some of these gases are stored at very high pressure.

Google mollier diagram.

 

[SPYDERLK]

Of course they do boil when changing from liquid to gas vapor. Then at higher temperatures they are superheated (Way above their boiling point). In example air is a mixture of superheated gases.

Liquids boil. As I said, gases dont.
larry

 

[Redneck in training]

Liquids boil. As I said, gases dont.
larry

Well I agree. I should have said liquid gas. In the common industrial jargon liquid gas is often called just gas and people know that is liquid based on the context of the discussion.

 

[Redbug]

That's pretty interesting JJ. I was looking at ammonia. It is pretty high on the list. Ammonia is used in some cooling applications. Hydrogen...way down there on the list. If the talk about using hydrogen as a fuel source...it looks like it would take a lot of energy to compress and cool it to make it usable. Seems like a problem waiting to happen. Just thinking out loud...

 

[BobRip]

That's pretty interesting JJ. I was looking at ammonia. It is pretty high on the list. Ammonia is used in some cooling applications. Hydrogen...way down there on the list. If the talk about using hydrogen as a fuel source...it looks like it would take a lot of energy to compress and cool it to make it usable. Seems like a problem waiting to happen. Just thinking out loud...

That is one of the problems with hydrogen. It takes energy to make, energy to compress, energy to cool, and since it has low energy density it takes a lot of energy to transport it. I cannot understand why they think it will be a viable energy source any time soon.

 

[MossRoad]

That is one of the problems with hydrogen. It takes energy to make, energy to compress, energy to cool, and since it has low energy density it takes a lot of energy to transport it. I cannot understand why they think it will be a viable energy source any time soon.

It made the Hindenburg go zoom! And that wasn't compressed much at all.

Seems kind of dangerous to have compressed hydrogen sitting in tanks under peoples' cars and trucks. I imagine you would have to get the tanks inspected every so often just like welding gas tanks and gas grill tanks. That will add to the cost as well.

 

[SpringHollow]

We just had a serious explosion here at a hydrogen filling station. They believe a tank was leaking.

Ken

 

[ponytug]

Having used hydrogen under low pressure, I can assure you that hydrogen goes through otherwise undetectable cracks in 1/4" steel. The idea that we are going to have any sort of extended infrastructure transporting hydrogen is laughable, unless it is liquified, which as pointed out is energy intensive...

I think that the only way we will use hydrogen in some future economy is to make it and instantly convert it to a higher molecular weight fuel, e.g. natural gas, propane, or ...

All the best,

Peter

We just had a serious explosion here at a hydrogen filling station. They believe a tank was leaking.

Ken

 

[Egon]

I can assure you that hydrogen goes through otherwise undetectable cracks in 1/4" steel.

Are you referring to Hydrogen Bubbles in steel shells?