Instructables
Picture of Dry Cell Electrolyser
An electrolyser is a piece of scientific equipment that splits polarised molecules into its ions. In this case it will split water into hydrogen and oxygen gas. A dry cell electrolyser is an electrolyser that is completely enclosed; the other type is a wet cell electrolyser which can be two metal plates in a bowl of water. The equipment is fairly simple but the theory behind it is a bit more complicated, if you’re not interested in the theory then skip to step 1.

Here’s the theory: the electrolyser uses the different ionic charge on the different atoms in the molecule to split it into its respective charged atoms or molecules, for example, water gets split into Hydrogen and Oxygen because in the water molecule the hydrogen is slightly positively charged and the oxygen is slightly negatively charged. These charges are only very slight, +1 electron volt (ev) for each hydrogen and -2 ev on each oxygen atom. Just for comparison 1 electron volt is 1.6×10−19 Coulombs (c) and 1 Coulomb is the charge transported by a steady current of one ampere in one second. The hydrogen is attracted to the negatively charged electrode or Cathode and the oxygen is attracted to the positively charged electrodes or Anodes. At the anodes the oxygen ions loose an electron and bond to form oxygen gas, at the cathodes the hydrogen ions get an electron from the cathode and then bond to form hydrogen gas. This transfer of electrons from and to the electrodes completes the circuit and allows current to flow. A catalyst can be used to make the process more efficient by reducing the energy needed to start the process; the catalyst that I use is sodiumhydroxide in a 1 to 40 mix with deionized water. The water doesn’t need to be deionized but it extends the lifetime of the unit as minerals and other stuff won’t build up on the electrodes.
 
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HappyA935 days ago

This is a really cool project. I was wandering where the attached PDF is... You mention it a lot throughout the instructions but I can't seem to figure out where it is.

asqw783 months ago

Instead of rubber gaskets, could I use rubber washers to avoid the plates from contacting then wrap the whole entire thing in some sort of rubber or fill the gaps with epoxy or hot glue?

Jamie bagn (author)  asqw783 months ago

I don't see any reason why this wouldn't work provided you got a good seal, you also want the individual cells between each plate to be as sealed as possible to increase efficiency, ie. this design is more energy efficient than the same plates in a bowl of water

profpat10 months ago
nice project!!
Nwosu Kingsley11 months ago
i would like to get a video on this process..........how about that?
godfish2 years ago
very cool and clean look, BUT.. how well does it work? there are lot's of HHO's out there and everyone has their own take on them, I've made 3 different ones and everyone resulted in a BIG BOOM, LOL.. No one was hurt and I had a great time in the making. So my question, how much gas can it produce per min?

Great design.
Jamie bagn (author)  godfish2 years ago
It filled a 2 litre bottle in a minute or so and I have filled lots of bottles with the gas and lit them and once I temporarily defend my self by igniting 5 at once.
Nice, that's good flow, and ya for some reason? maybe because of the Oxy with the HH it makes a big BOOM, now matter how small the amount, I could see the flame running up the tube to the chamber, POW. Great fun.
godfish

you can fix the BOOM if you have a bubbler in line. This fixes the blow back or in your case boom. It is just a separate container that has the hydrogen in a tube to the bottom of the container filled with water than another hose not submerged in the water that collects the gas and goes to what ever you have it hooked up too. so it doesnt go into the main generator
Redion1 year ago
May I ask where did you buy the plates?

RaD
Jamie bagn (author)  Redion1 year ago
I got them made by R and D precision because my dad's company uses them. Here is there website http://www.randdprecision.co.uk/