[vdblnkr34 (OP)]

Hello. 

If to blend propane with hydrogen. What would be better for burnout. To mix oxygen together or add it into the air next to burners?

[Bored chemist]

What are you trying to achieve?

[vdblnkr34 (OP)]

To mix gases together and burn it.

[Bored chemist]

To mix gases together and burn it.

WHY?

[chiralSPO]

different goals will likely require different approaches. are you trying to maximize temperature of the flame? amount of thermal energy per unit time? most efficient use of oxygen? trying to drive piston? etc. etc. etc.

[vdblnkr34 (OP)]

To begin introducing hydrogen with the gas burners. To operate burners on hydrogen/oxygen gas or propane/hydrogen or propane/hydrogen/oxygen. To reach higher flame what would be the best choice to inject oxygen before or after burner?

[Bored chemist]

To begin introducing hydrogen with the gas burners.

What gas burners?
The ones in my kitchen don't need an oxygen supply.
Converting to using pure hydrogen would probably take some planning.
Adding some hydrogen into the gas supply works.
https://hydeploy.co.uk/hydrogen/hydeploy-at-keele-live-pilot/

You still have not said WHY YOU WANT TO DO THIS.

If all you want is a hot flame, just look at how oxyhydrogen torches are already made.

[vdblnkr34 (OP)]

trying to make hydrogen/oxygen electric generator.

[vdblnkr34 (OP)]

Thats what is needed, a hot flame.

[Bored chemist]

Thats what is needed, a hot flame.

If you have hydrogen and oxygen and you want to make electricity, it is much more efficient to use a fuel cell.
Why would you want a hot flame?

[vdblnkr34 (OP)]

Hot flame is to power the boilers that will generate steam.

I dont know how fuel cell works, and what would be the difference if to use fuel cell or burners?

fuel cell is for internal combustion?

[Bored chemist]

https://en.wikipedia.org/wiki/Fuel_cell

[Bored chemist]

what would be the difference if to use fuel cell or burners?

As I said

If you have hydrogen and oxygen and you want to make electricity, it is much more efficient to use a fuel cell.

[alancalverd]

Hot flame is to power the boilers that will generate steam.

If you have hydrogen and oxygen, you can make steam by simply burning the hydrogen in the oxygen. No need for a boiler! You can use a continuous burn to drive a turbine, or feed the mixture into an internal combustion (piston or Wankel) engine and ignite it in pulses.

But if you want to generate electricity, it's more efficient to use a fuel cell rather than a turbine and dynamo.

However all this presupposes that you have a source of hydrogen. There is no free hydrogen on this planet - it's mostly combined with oxygen as water, so we use electricity to separate the two elements. If you electrolyse water with an alternating current, the gas that comes off both electrodes is the ideal mix of hydrogen and oxygen, known to its fans as Brown's Gas.

[vdblnkr34 (OP)]

true, true. Browns gas is a good choice.

Also there is another way is to heat the steam to 500C and then pass it through high voltage capacitor or tesla coil sparks to ignite it right away. Probably Tesla coil idea is the best.

[vdblnkr34 (OP)]

Can i set steam on fire using plasma? Or it will work only with the electrical high frequency sparks.

[wolfekeeper]

To begin introducing hydrogen with the gas burners. To operate burners on hydrogen/oxygen gas or propane/hydrogen or propane/hydrogen/oxygen. To reach higher flame what would be the best choice to inject oxygen before or after burner?

In rocketry, the finding is that gases burn and mix super well, so they take great care to gasify the propellants before burning them. Sometimes they have preburners that they run fuel rich and oxygen rich, and then they combine the outputs together. But in rocketry they usually start off with liquids, they can tend to burn rough, whereas gases tend to burn really well.

Thoroughly mixing gases together before you ignite them sounds like a BAD IDEA. If you mix in oxygen with hydrogen before lighting it, you tend to get a detonation. Do you want a detonation, because that's how you get one.

[vdblnkr34 (OP)]

If to use AC current, so they will be already mixed. Would that be ok?

Can i mix hydrogen with propane?

[wolfekeeper]

Mixing fuels is usually fine, although be careful of two phase flow if you're mixing gas into liquid propane. Mixing fuel and oxidizer together virtually never goes well. You might get away with it if the quantities involved are very small, but the flame front will usually go back up to the point where they are mixed; and that can happen supersonically.

[vdblnkr34 (OP)]

https://en.wikipedia.org/wiki/Fuel_cell

It is only 40% to 60% efficiency. High power steam turbines are 80% to 90%, steam engines 40% to 70%. Will in the future fuel cell technology improve and provide 90% of power efficiency? No clue.