wonder what pressure you'd get dropping a menthos sweet into some coca cola
Really, sorry if I am being boring, I'll check old threads about it.This does the round every few years.
Same as the one using hydrogen from water to power a car.
I am more intersted more in the baking soda rather than the gadget. As a bottle I think you can use even a plastic bottle, connect it to another plastic bottle filled with water, connect the second bottle to a third plastic bottle filled with dessicant, connect the dessicant bottle to a PCP hand pump (there are two holes near the handle where the CO2 will enter the piston), connect the bottom of the hand pump to the final cylinder you normally would use to refill. As soon as you see the first bottle expanding (squeeze it before, to give space for the gas), you can start pumping. For the pressure I read that a PCP pump can use up to 300 bar (4300 PSI), 200 bar is 200 times the normal atmospheric pressure, that is really high.I used to run a pub (left there with a few "spare" co2 cylinders and several out-of-date fire extinguishers).
Both ideal for my hobby welding using a 2 stage regulator, and I used to have a nearbire fire extinguisher place that refilled pub co2 bottles for under £20 last time I visited.
A shame I've moved house since, getting any kind of gas locally at the new place is near impossible.
OP - it's an interesting gadget but not sure how the cost of the kit works out against the cost of a refill?
I'd like at least 20psi available when I'm welding, no idea what the kit above would supply, or how long it would last.
Interesting idea, thanks for sharing
Really, sorry if I am being boring, I'll check old threads about it.
I am more intersted more in the baking soda rather than the gadget. As a bottle I think you can use even a plastic bottle, connect it to another plastic bottle filled with water, connect the second bottle to a third plastic bottle filled with dessicant, connect the dessicant bottle to a PCP hand pump (there are two holes near the handle where the CO2 will enter the piston), connect the bottom of the hand pump to the final cylinder you normally would use to refill. As soon as you see the first bottle expanding (squeeze it before, to give space for the gas), you can start pumping. For the pressure I read that a PCP pump can use up to 300 bar (4300 PSI), 200 bar is 200 times the normal atmospheric pressure, that is really high.
I know, but why is that a problem? It means that a hand pump is more than sufficient.First problem with this is that co2 gas turns to liquid around 800psi so you'll never get close to 200bar..
I know, but why is that a problem? It means that a hand pump is more than sufficient.
No, I was just mentioning the power of these pumps. If you don't want to get tired you simply put less baking soda, and do it again later when you feel like. For the price I am sure you can buy citric acid and baking soda in bulk on Amazon and it might costs you just £1 for 100g of CO2. I wonder how many recipes are possible using different things like sugar, yeast and white vinegar.It's not a problem if you just want to pump co2 into a bottle. I thought you ment you wanted 300bar for something.
If it's just for welding I can't see it making sense.
For a start, you can only pump it as fast as its produced so you'll want a big production tank unless you want to stand there all day.
Or, an automatic system if you can do that on a budget?
Secondly, in the video he says it produced 105g of co2 for £2. That's about £19/kg.
You might be able to buy the ingredients in bulk to get that cost down but still a long way off the price you can just go out and buy it for.
did you have that "drinking bird" toy as well ?This reminds me of those little plastic submarines you used to get free in breakfast cereal powered by baking powder back in the day when old people were 6years old.
Up and down and up and ddddddddddddddddddoooowwwnnn snore
CO ?If you can compress it why not bottle exhaust gas from a running engine? Dunno what it would like be for welding.
80% of what goes in is Nitrogen. About the same coming out, too, once it has cooled and water has condensed.CO ?
Oxides of Nitrogen ?
The exhaust of an engine is filled with many different gases.
Just buy what you need.
Yeah but no or next to no oxygen left in, it will be inert gas.CO ?
Oxides of Nitrogen ?
The exhaust of an engine is filled with many different gases.
Just buy what you need.