Built a new compact PEM hydrogen generator!
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- Опубликовано: 26 июл 2024
- I bought a PEM electrolyzer capable of 2 liters / minute and built a beautiful apparatus around it for producing pure hydrogen from deionized water.
Shortly, I will also be uploading a video of my water cleaning process and another that displays a view from a camera lifted high into the sky by a giant hydrogen balloon! 
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finally someone built a flowcell!!
Beautiful
Thank God you're posting again!❤
Thanks Brian! Yeah, I want to keep things going this time. So I plan to shoot the video from the sky tomorrow!
It's a very cool build .....great work.
Thank you so much!!
Bro,I remember you! That's pretty cool!
Hi, Again, great work and contributions of your time and energy to help others! :-) Thank you so much! My question on this video is if you ever found out how the H2 return water ionizes the water system so that you have to use that deionizer system? Minute 6:30. Like the fact that all PEM systems put out some H2O with the H2 output, I presume that that H2O is also ionized in all PEM systems as well?
Interesting! But do you think that with such a system it will be possible to charge the batteries of a photovoltaic system in the future?
Integza took care of your caveat sympling by adding a spring mechanism im his video of rocket propelling
Can you make video how to build it.❤
What is the details of building the generator ????
thanks so much for this video, now I understand what you are up to. take care and keep us posted. What is the life time the electrolyzer supplier promised?
Thank you for your comment! Please let me know if you have any other ideas for hydrogen and/or oxygen. From what I read, a PEM electrolyzer can last for 40,000 hours. I expect mine to have a shorter lifespan because I start and stop it a lot more often than what is typical. They're made to run continuously and I hear many "cycles" reduce the lifetime. Now, for my acrylic weld joints, I'm not sure :)
bru, put a positive terminal in some water, let it drip over some aluminium wire that is negative charged. when the two meet, it should flash into 100% HHO with aluminium oxide as a byproduct, the aluminium oxide can be heated back into aluminium. to increase the productivity of the gas, use some gallium as a catalyst. the gallium will not flash away.
Bro i need help how to bulit pem hydrogen generator 250cc please for my btech mechanical engineering finl year project
nice and also if possible share detail and design how to built this
Do you mean the whole apparatus or the electrolyzer unit itself? This time I didn't build the actual electrolyzer myself but I built the apparatus. The electrolyzer is just the little metal and plastic cube on the bottom platform. However, I built similar electrolyzers before. You can google PEM electrolyzer cell stacks to get more information. It involves sandwiching a bunch of MEAs between graphite or titanium plates or screens and having channels in the plates for the gasses to escape from either side and for water to flow in.
Where did you but the unit? Can you supply the contact info so we can also buy one
Hello. Good design. I want to know if the water is alkaline or not.The size of the plate? Thank you.
Sorry for the slow response. This one isn't alkaline, only uses pure de-ionized water. It's 10 PEM (proton exchange membrane) cells in series, so 9 neutral plates, 11 total, with 10 membranes in between. I didn't build the electrolyzer cell itself in this particular build (I built the apparatus) and I don't have it in front of me but the active area of each cell is pretty small, somewhere in the neighborhood of 2" x 2.5". Pretty good output for something so small, huh?
Hi interesting video, firstly do you think the camea will survive ?, Do you no recon by the time the balloon reachess altatudde to be fit and ready to ... bursting ....if windy atall, atall, your camera might be blown half way ower the English channel... And that vra Lyn song, and we do SING as we wave ... You ...good bye... Mmmm just a thought... Good old vera..
Other thing is how meny littres voluume does the balloon contain,... 18 Lr at very most ?.. look forward to hearing your outcome.. should be intreging too.
Thanks
Thom in Scotland.
Hi Thom! Thanks for commenting. Scottish people are great. Actually, I do have another video where I launched balloons. You can click on my channel to see the other videos. It was after this one. You are totally right that wind was a problem. Not only was it blowing my balloons and camera too far in one direction (where I didn't want it to go) but the wind caused too much shakiness and turning, making for a hard to watch video. I used 36 inch balloons. In one attempt, I used two of them and each is 120 liters so the 2 balloons was around 240 liters of hydrogen!
sorry......i did not know that thing was built like a fuel cell.......i thought: 2 plates, stainless, polymer mesh between, so can use either a.c / d.c. , so not a problem........i stand corrected.
thank you.
p/s........happy new year! :)
Sorry for the very slow response. Yeah, it really is like a fuel cell. In fact, it really is! When I suddenly disconnect power to it, it will start consuming the hydrogen making contact with the cathode and actually produce electricity. I noticed this once when my power supply LIT UP after I unplugged it. I was like "DANG! It's running off of hydrogen right now!". Even the fan was running. There are some differences between a PEM electrolyzer and a fuel cell though. I think fuel cell PEM membranes can get away with being a little thinner but many of them have liquid cooling on the other side of each plate.
So nis
How can i get a stainless steel set up here
I'm not as familiar with HHO hydrogen generators. I only built one in the past and I know you use stainless steel because it's more chemically resistant than most metals and relatively cheap. These PEM cells actually have some platinum inside them, which is way better than stainless steel even. It's such a small coating that it doesn't drive up the cost too much but still considerably. Doesn't mean PEM electrolyzers don't degrade though. The platinum doesn't degrade but the Nafion membranes in between each plate does degrade over time.
Hey. Can't you make one big one with maybe 5 or 6 complete cells to make a prototipe for sale. You have a business oportunity there🎉🎉😊
You think so? 😊 One thing for sure, if I were to consider doing that, I'd have to improve my process for cutting the acrylic. I had a hard enough time making the pieces for this one that I can't imagine doing it in bulk. Maybe a laser cutter to make precision cuts?
How many Kws per Kg of H2? Thx
Hi, that's a good question. I just ran thru the calculations. If I run it at only 1 LPM, I can operate it at only 18V (or 1.8V / cell) once the water warms up and I calculated it to be 47762.376 Wh per Kg so 47.7 kWh per Kg.
instead of feeding that thing with D.C., try using A.C., you'll get much better (cooler) thermal performance.
With a PEM-type electrolyzer, you have to keep the polarity right, so A/C would destroy it. I think it has something to do with one side not being fed with water (negative / hydrogen side), even though water comes out of that side with the hydrogen. The proton exchange membrane would burn up. I suppose you could design one that feeds water into both sides and use A/C.
@@ChristmasEve777 Don't listen to the whackjobs spouting nonsense about using A/C with an electrolyzer. If you want your PEM stack to last, you have to keep 3 things in check:
1. Polarity, voltage limit. DC only, please. And given that you use no pumps, no more than 2V or so per cell, to limit oxidation of the oxygen electrodes. This voltage limit is also dependent on stack temperature. The cooler, the better, even if that limits your gas generation rate.
2. Water quality. Only use DI water, and keep contamination sources (like dust), to a minimum! Most commercial systems use a resin exchange filter to maintain water purity.
3. Pressure. Keep to a minimum pressure in the hydrogen side of the system. Mixing of oxygen and hydrogen accelerates aging of the membranes.
Hope this helps, it does look like a neat little tabletop system!
PS: the reason most systems use water circulation in the oxygen side is to maximise system performance: you spend a bit of power in the pump, but you can reach higher currents for a given voltage. This means your system can use a smaller stack, and your energy efficiency is higher. It also helps cooling the stack at high currents.
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Apparently you have never seen a hydrogen explosion.
It takes about a cup full of hydrogen to make you look like a piece of fried chicken.
I have seen this happen and the effects from places that I have worked.
One was a hydrogen purification process where the technician was trying to change out a valve.
He was using a steel wrench to disassemble the pipe and a spark set it off... he should have used brass wrenches.
I met him the day I left that job... he did in fact look like a piece of fried chicken, picture a chicken leg.
I am not sure how he survived and I would not have wanted to.
Another workplace was where hydrogen formed between a 6x6 foot box of water and a 2500 degree ash-bridge above it.
When the ash-bridge was broken from above, the explosion blew the operator about 40 feet to the roof of another building.
The operator did survive also but there was some major damage.
That 6x6 foot 1" thick Inconel box was twisted like a soda can.
Hydrogen is nothing to mess with.
If you are going to do this, stay a week away from it.
Google the Hindenburg, 35 fatalities.
I know it is a dangerous gas. But I have igniting volumes of hydrogen greater than the side of a beach ball (using a long pole). I know the amout of energy that's released. The good news is I have never had any hydrogen spontaneously (or accidentally) ignite and I've been doing this since I was in 8th grade. The Hindenburg was a terrible mistake. The Germans thought it was a practical and cheap way to lift a heavy payload, despite the danger. They were right about it being cheap.... not practical.
Just drink it
haha! It's theoretically only distilled water. The prolem is, I have no idea if it's picking up contamination from the electrolyzer.
no, I mean make hydrogen water with a diffusion stone wand into a cup of glass, ive never seen any video of any hydrogen youutber drinking from a chinese machine, im wondering if they dont pass medical certifications, or have toxic plastic materials.
@@ChristmasEve777
You did not build it, but you bought it from China, maybe that is what you meant! 😂
I believe I stated that I didn't build the electrolyzer in this video. I built the rest of the apparatus. But in earlier videos (the clear PEM cell stacks), I DID build those from the ground up from parts from H Tec.