Why Does Compressing Hydrogen Increase Explosion Risks?

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    Compression Explosion
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Discussion Overview

The discussion centers around the risks associated with compressing hydrogen, particularly in relation to explosion hazards. Participants explore the nature of these risks, the role of compression in increasing the likelihood of explosions, and the conditions under which hydrogen may become explosive when compressed.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants question why compressing hydrogen specifically carries a significant risk of explosion, suggesting that this may not apply to all gases.
  • There is a request for clarification on the definition of "explosion" in the context of gas compression.
  • One participant notes that hydrogen itself is not inherently explosive, but highlights the dangers of compressed oxygen interacting with flammable materials.
  • Participants inquire about the specific role that compression plays in increasing explosion risk.
  • Another participant elaborates that higher compression increases the demands on containment vessels, raising the likelihood of failure and subsequent explosive release of hydrogen.
  • It is mentioned that the energy released upon failure can lead to significant damage and that the volume of hydrogen influences the potential for ignition and explosion.

Areas of Agreement / Disagreement

Participants express varying views on the nature of explosion risks associated with compressed hydrogen, with no consensus reached on the specifics of how compression influences these risks or the generalizability of the phenomenon to other gases.

Contextual Notes

Some assumptions regarding the definitions of terms like "explosion" and the conditions under which gases become explosive remain unresolved. The discussion also highlights the dependence on the design and integrity of containment vessels.

Pranav Jha
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It is repeatedly mentioned that "compressing hydrogen carries a significant risk of explosion"?. But why does compression of hydrogen carry explosion risk? Is it true for all gases?
 
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Do we somehow increase the chances of "explosion" (defining the term while explaining would be helpful) by compressing a gas?
 
Hydrogen by itself isn't explosive, but compressed oxygen with anything that is flammable or oxygen compressed with another flammable gas can be explosive.
 
What role does "compression" play here?
 
I meant how does compression go on to increase the chance of explosion?
 
Pranav Jha said:
I meant how does compression go on to increase the chance of explosion?

The more highly compressed the hydrogen is the more will be required of its containment vessel. Given the same vessel a higher pressure will be more likely to breach the vessel. In addition, the higher the pressure, the more energy is released, the more likely the uncontrolled release will cause damage, injury, death, etc...

An explosion is a rapid release of pressure. In the case of a chemical bomb the pressure is produced by the chemical reaction and released because it's container (if it has one) is designed to fail at a certain pressure. In the case of compressed hydrogen the pressure results from the compressor which put it into the storage tank, the release happens if the container fails for some reason (impact, rust, overpressure, etc...)

Once the hydrogen is released there is a secondary danger that it will catch fire causing a much higher quantity of destructive energy to be released. The more hydrogen you start with the larger area it will expand into before it becomes to diluted to burn. The larger area offers a higher probability of it finding a source of ignition.
 

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