Linnard?s hydrogen on demand system without electricity !

[Tacmatricx]

Hey Guys,

I'm still reading through this project (currently on forum page 23). I think you were onto something with the threaded AL insert but the amount of Al contacting the Zn may not have been enough?

Here is a design I am considering putting together (Attached) I will probably use a plate of some sort on the far end and tap weld the (welding) rods to it... should be pretty easy. All rods will be supported from both ends by either welding to stainless steel plates or sitting in drilled & glued perspex (Need to confirm it will survive in NaOH).

Notice the chamber sizes so that the H2 side is exactly twice the volume of the O2 side so that the pressure builds equally.

Let me know if you guys want an exact build plan of this?

Thanks,

Chris

[ResinRat2]

Hi Chris,

I did a great deal of testing with various configurations on the aluminum-zinc rod idea. I found, in the end, that the zinc would replate on the surface as zincates. Zn(OH)₄^-2. There was nothing to drive the oxygen off and replate the zinc as pure zinc. The only way I was able to do this was to put an electrical reverse current (negative on the zinc, and positive on the tungsten sides) on the electrodes and release the oxygen. Otherwise the zincates would eventually totally cover the zinc electrode surface and kill the reaction.

The aluminum rod inside the zinc rod encouraged the zinc to galvanically replate as a zincate, but it wasn't enough to get pure zinc replated. After a couple of weeks of testing, I finally gave up on the aluminum rod angle.

This was my experience, but I don't want to stop you from your research. You may find a way to make it work. Don't hesitate to send me a message if you have any questions and I will be happy to tell you what I did and my results.

[Tacmatricx]

Thanks for the reply ResinRat,

I was just thinking, when you tapped into the Zinc rod and screwed the Al rod into that... did you try tapping deeper into the Zinc? Were all your experiments based on the same surface area in contact between the Zinc and the Al?

Just a thought as Dr. Linnard is the one that got us onto the plating idea?

Chris

[ResinRat2]

Hi Chris,

All my experiments had the aluminum rod about 1 inch deep inside of a six inch zinc rod. I never went any deeper.

[ResinRat2]

Hi Chris,

One other thing, when I initially starting I used just a plain aluminum rod and the zincates formed on that. I ran and FTIR analysis of the coating and it came up as zinc carbonate after it had been dried at 250 ?F. This allowed me to deduce that the zincates were reacting with the carbon dioxide in the oven and forming zinc carbonate. So even just using a plain aluminum rod without a zinc coating it was already forming the zincates. That is why I don't think you would have much luck with this angle. However, I have been wrong in the past; it wouldn't hurt to revisit this area of research again and either confirm my results or show I did make an error in my interpretation.

I actually would like someone else to try their hand at it as well. It would help myself and others to try and find the right path this research needs to take.

Thanks for your willingness to experiment and help.

By the way, I really like your drawing --- nice job.

Dave (RR2)