I am interested in using electrolysis of water to generate hydrogen. I believe I have three good renewable sources of electricity (solar, wind and hydro). To start, I intend to put a little electric generator on the stream in my farm and slowly convert that energy to hydrogen for use in a converted propane generator to generate electricity.

Capturing the hydrogen will be easy, but what is the best way to store the accumulated hydrogen gas?

  • $\begingroup$ Carry water around and only generate hydrogen when you need it ASAP. Pure hydrogen is highly explosive. $\endgroup$ – Renan Apr 12 '18 at 15:31
  • $\begingroup$ Chemists and chemical engineers know well how to store hydrogen. Ask there. $\endgroup$ – L.Dutch - Reinstate Monica Apr 12 '18 at 15:32
  • $\begingroup$ I'm voting to close this question as off-topic because it probably belongs on chemistry.stackexchange.com $\endgroup$ – The Anathema Apr 12 '18 at 16:16
  • 1
    $\begingroup$ @Renan: Pure hydrogen is not explosive, not even a little. Mixtures of hydrogen and oxygen are explosive. So you may carry hydrogen around all day long provided you make sure that it does not escape and mix with the oxygen in the air; this may be somewhat difficult, but the difficulty is mitigated by the natural tendency of hydrogen to go up up up. $\endgroup$ – AlexP Apr 12 '18 at 16:38
  • $\begingroup$ There is no good way to store large quantities of hydrogen. You need either high pressure or extreme refrigeration. Besides, you lose considerable energy in using electricity to produce H2, then burning it to generate electricity again. Much better to use the electricity directly, with perhaps battery backup. $\endgroup$ – jamesqf Apr 12 '18 at 19:12

Hydrogen can be stored in two ways: As a compressed gas in high-pressure tanks (beware, highly flammable!) As a superliquid (the catch is it has to be at around -260 degrees Celsius, so you'd be wasting more energy than you got.) Perhaps you should consider harnessing it at the moment you split the water, instead of storing it. Or use those forms of renewable energy mentioned earlier.

| improve this answer | |
  • $\begingroup$ I appreciate your enthusiasm, but generally it's frowned upon to answer off-topic questions like this one, in case it encourages people to ask more of them. $\endgroup$ – F1Krazy Apr 12 '18 at 16:47

Not the answer you're looking for? Browse other questions tagged or ask your own question.