# Is it possible to run a small gasoline car 100% on hydrogen alone ?

Theoretically you can, but did anyone really do this with success ? Anyone knows of a link that has all the details for such a project ? I need to know how big the hydrogen generator should be and how to safely connect the hydrogen supply to the motor, how to mix the hydrogen with oxygen and what ratio, is it better to mix with pure oxygen or just normal air or maybe hydroxy just works fine ?! How to prevent firebacks... too many little details to be discussed.. so anyone has any usefull info just throw it at us please to try to make a really efficient 100% hydrogen powered car.

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8 years ago
Run the numbers. A 2 liter engine at 1000 rpm is going to need 2 x 1000 liters of air + combustible gas, air is 21% O2 and you need twice as much H2 as O2. That's about 30% (8 parts N2 + 2 parts O2 + 4 parts H2 is 4/14=28.5%), so 2000 x .30 = 600 liters of H2 per minute (at 22 liters per mole STP, that's about 27 grams of H2, or about 220 grams of water hydrolyzed). Can you picture 10 liters per second of H2 production? It's about the same as a 7 hp air compressor.
8 years ago
. Cut your figures in half. For a 4-cycle engine, one revolution is used for compression and no air/fuel is pulled in. Ie, your 2L engine will only suck in 1L per revolution. . Still a lot of gas.
8 years ago
Yah, you're right. The first time I did this was for a 2 cycle and forgot about 4 cycle difference this time : P
Nick_Zouein (author)  jtobako8 years ago
Those are really big numbers, i never thought it might be something like that ! Really disapointing !! But in reality it doesn't seem that the car sucks such amounts of air, i mean when you put your hand in front of the air filter opening of a car it doesn't seem to be sucking such huge amounts of air. The numbers you displayed seems like the air intake of a hoover carpet cleaning machine !
8 years ago
A vacuum cleaner is sucking closer to 150 cubic feet per minute or more-about 5-6 times as much air threw a smaller tube.
RizkyL11 year ago

Or we can mix butane fuel.with hydrogen fuel for more efficient combustion

RizkyL11 year ago

In our region we use 100% cheap goverment butane fuel for about \$1.5 , with 1 kg used for 75 km city zone, but not good at hill road area, for 998cc carburetor gassoline engine. I know it is still.fossil fuel, but it wold helpfull for farmers small engine, i can show you the construction

hydroganic7 years ago
Yes it is possible to run your car on no petrol , lpg, ethanol using hydrogen on demand threw electrolasis. I have done it and continue to do it .
100% no more revenue to the fuel companys.
5 years ago
Hi Hydroganic,
few quick questions on your experience.
Upto what RPM you are running your car?
what engine size?
r u running on wet cell or dry cell?
how far can you drive in one go without stopping? i.e. 150 miles straight one of drive?
do you start engine with hydrogen gas or start with petrol then convert to hydrogen gas?

Thanks