Clarification on Liquefaction of Hydrogen Gas

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Hydrogen gas is converted to liquid in industry primarily through a process that involves cooling and pressurization. The gas must be cooled to temperatures between 20-30K while under high pressure to achieve condensation. A common method includes initially lowering the temperature of hydrogen to around 70K and then expanding it, which further reduces its temperature. Following this, the hydrogen is pressurized to complete the liquefaction process. Understanding these steps is crucial for grasping the industrial production of liquid hydrogen.
Sheissy
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Hi there,

I've been looking around on the net for some information on how Hydrogen gas is converted to liquid in industry. However, I haven't had too much success. If anyone could help me understand the basic process I would be very grateful.

What I currently know is that the Hydrogen needs to be at 20-30K and a high pressure to condense. I also read something about lowering the temperature of the Hydrogen to 70K then expanding it to reduce its temperature further. I assume this would be followed by pressurizing the Hydrogen to finish this process?

Thanks a ton!
 
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That was very helpful, thanks!
 

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