HHO Generator, Quick and Dirty edition

Front and Back oxygen sensors

If you have seen in this action movies when the hero of the moment hits the hydrogen valve and the care suddenly flies over the asphalt then you have a form a HHO system and just didn't know the name. The official pose of those systems (EFIE) demand a slide style like this one :-)`

car GIF


Lab HHO generators are expensive. For a project that I am investigating, I needed a gas to propel a certain number of revolutions in a mechanism I am working on. Since my mechanism is wheel shaped I naturally thought of generating fumes via a HHO generator. I didn't want to spend a ton for something that I wasn't sure that was going to be an essential item of my research so I figure:

How hard would be to build one, DIY style? Well... that's what this post is all about. Let's build and test one. Before we get our hands dirty let's learn some basics knowledge so we know what's going on.

As with all DIY projects:

BE CAREFUL, USE PROTECTIONS AND DON'T BLAME ANYONE BUT YOURSELF IF YOU GET HURT OR CAUSE DAMAGES BECAUSE YOU ARE THE ONE FACING REALITY SUX MOMENTS IF YOU DON'T PAY ATTENTION OF OVERESTIMATE YOUR OWN ABILITIES.

Science Tidbits

A Hydrogen generator uses a proton exchange membrane (PEM) to produce high purity hydrogen gas from water. The PEM cell was originally developed by NASA and is extensively used in industrial and laboratory applications. Hydrogen is the most abundant element in the universe, although in its gaseous state it does not naturally occur on Earth and must be manufactured.


Electrolysis of water is the best method of producing high purity hydrogen gas on demand. The most important element of the generator is the electrolyzer cell where the electrolysis reaction takes place. The cell consists of two electrodes (an anode and a cathode) when a continuous voltage is applied to the electrodes on the electrolyzer cell, the following reactions take place:
 
 

In other words... water is placed into a container with two metal plates. The plates are then "charged" through the introduction of electricity causing the elements of the water to separate into H2 and a byproduct that is not used by the generator. The H2 is then removed from the container. The last part means: it's gas, escapes, so you trap it and then use it. In my case I will bottle it :-)

 
I did say water but it's not drinkable nor "just" water. It is mixed with potassium hydroxide. Concentrated solutions of potassium hydroxide are generally used as the electrolytic solution because they have very high conductivities and fewer corrosion problems compared with other alkaline electrolytes.

Design

I use Paper on my iPad Pro when I have to put design thoughts together. Here is what I came up with. The membrane (Diaphragm) in this case is on the extremities of the apparatus instead of being in the center but the principle is the same.
 

Materials list

I headed to Home Depot and bought the following items. I could have spent less for some items but since I was at it, I figured I could have used some extras for future projects. Like the famous orange bucket :-)
 
Via Amazon I purchased Potassium Hydroxide for cheap. Ah...before I forget power source. It appears that to make electrolysis work the electro part is crucial... go figure!
 Bitmoji Image

Assembling

  1. We make four threaded holes on the metal washers so that we can hook the electrodes aka the bolts
  2. Washer 1, we attach on any electrode the positive wire
  3. We repeat the operation for the negative pole
  4. We place the plastic washer on both part of the polarity poles
  5. We glue them together to make sure that all stays in place
  6. We attach the hose connection
  7. We Seal everything (and hope...)

Let's build it

Inventory check 
 
I will update the post with better photos shortly. 
(sorry light in the shed is a work in progress..)

Let's see it in action

[video here]

References

 
 
 

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