About metal hydride?

When I fill metal hydride in tank or cylinder to storage Hydrogen gas Do I must refilling agin metal hydride to the tank or cylinder to storage Hydrogen?

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iceng1 month ago

If you have hydrogen gas under pressure, there is no container on earth that will successfully contain H2 gas for long... This is because hydrogen is the smallest atom there is, just one electron and one proton, and can leak through any material !

That's why metal hydrides are so interesting, they form a porous surface which absorbs hydrogen, and have such a vast surface area they can hold relatively large amounts

https://en.wikipedia.org/wiki/Hydrogen_storage#Met...

*on which hydrogen adsorbs and not only absorbs. The difference is explained better than I ever could on wikipedia :

https://en.wikipedia.org/wiki/Absorption_(chemistr...

https://en.wikipedia.org/wiki/Adsorption

But basically, the macrosopic pores are filled with hydrogen gas (absorption) and the surface reacts with hydrogen to form a layer of metal hydride (adsorption).

What makes metal hydrides interesting is their low density yet high hydrogen uptake ability.

Source : 3rd year PhD student on fuel cells

Source : 3rd year PhD student on fuel cells

Who is ? You is ?

Anyway, interesting information. TY

Yeah it's me. I'm no expert on storage, I work mostly on anode materials. But I've got some background

deluges deluges1 month ago

* a layer of bound hydrogen on the metal hydride surface. Typed faster than I should have.

Cool, so there is a competition among manufacturers of reusable chemical molecules that capture one to four hydrogen atoms under one condition and release those same hydrogen atoms under a different condition.. Thereby avoiding pressure containment losses by using chemical bonds...

This is very much like our blood cells transport oxygen and CO2 !

Hamzaaite (author) 1 month ago

First of all I would thank Mr Iceng and Mr Steveastrouk to answer my question.

Let us discuses in the details two subject .

The First. How I produce pure hydrogen gas ?

The Second. How do I storage hydrogen gas?

When I produce pure hydrogen gas I choose method without electricity .

1- 1 to 2 liter of water.

2- 100 gram to 150 gram of naoh.

3- 50 gram of Aluminum.

I mix the water and naoh together after 2 or 3 min I add to Aluminum.. This way how I produce pure hydrogen gas at big tank and strong.

There are my question.

1- Do I produce hydrogen gas or HHO ?

2- Which type of Aluminum do I use to produce pure hydrogen gas?

- 1cm to 3cm pieces .

- Pellet of Aluminum which smaller than pieces.( I take pellet under the saw from workshop of Aluminum ) .

3- Which level or heat (C) of temperature do I allow to be to produce pure hydrogen gas?

iceng Hamzaaite1 month ago

I am not a chemist or even a good cook.

But (1) HHO == H2O == water vapor is usually what sodium hydroxide produces..

(2) I have no idea which version of Al is the most pure.. The smaller the size of Al the faster (also hotter) and more thorough will be the chemical reaction.

(3) Temperature should be low enough to prevent any hydrogen gas igniting with nearby oxygen.. A CRC hand book on chemistry should give you the reaction formula and optimal conditions including temperature if it is important..

Be save...

deluges iceng1 month ago

HHO is not water (I know but bear with me) I've seen it before and I think that amateur fuel cell enthusiasts came up with that term to name a 2 : 1 mixture of dihydrogen : dioxygen.. 2 H2 : O2 is called HHO. It's stupid and goes against all nomenclature I've ever learned but I think that's what it is.

That being said, let us all beg the author to not try and complete this project as from what I can extrapolate his level of knowledge is from what he has written, it seems like a dangerous endeavour at best.

Hamzaaite, please do not proceed without proper training and / or studies. It will blow up in your face and kill you.

iceng deluges1 month ago

Agreed, if the meaning HHO is in gas form. THEN you have a very explosive mixture ready to release copious amounts of energy..

deluges deluges1 month ago

Oh yeah and the 2 : 1 H2 : O2 mixture is the natural ratio occurring from the electrolysis of water. 2 H2O -> 2 H2 + O2

1. If you need to ask this then you should not play with hydrogen.
2. Does not matter at all as long as there is aluminium in it.
The smaller the pieces the more violent the reaction.
3. Again, does not matter at all.

No.