Re: Can I burn hydrogen in propane tractor

Posted by Gerald J. on February 17, 2007 at 08:08:22 from (67.0.102.184):

In Reply to: Re: Can I burn hydrogen in propane tractor posted by Bill(Wis) on February 17, 2007 at 05:40:14:

While its really hard to contain and just hard to make from water (though hot steam hitting red hot iron is a more energy efficient production process than electroysis) hydrogen has very interesting combustion properties. It will burn in air at concentrations from about 4% to somthing over 80%. The optimum bang is with 2 parts H to each part oxygen to make only water as the combustion product. That making water is what keeps up all the interest. For the combustion products from an engine to be only water means the combustion temperature has to be low enough to prevent making nitrous oxide from the 20% nitrogen in the combustion air. Trouble is the engine efficiency is higher with higher combustion temperatures.

Hydrogen may be better used in a fuel cell than a reciprocating internal combustion engine. And there are fuel cells that will use the handier fuels like methane or ethanol, doing some reforming of the vapor to concentrate the hydrogen for the fuel cell.

Gerald J.

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