If hydrogen is combusted near its stoichiometric air:fuel ratio, high combustion temperatures result in the formation of oxides of nitrogen (NOx), which have to be cleaned up by a catalytic converter. The formation of NOx can be mitigated by running the engine on a lean air:fuel ratio, which reduces combustion temperature. However, this strategy also reduces power and performance.
By volume, a vehicle uses 3.5 times more liquid hydrogen than gasoline
To attain low-emissions-vehicle (LEV) status in terms of NOx without a catalytic converter, the P2000 cruises at a very lean air:fuel ratio of 86:1, compared to hydrogen's stoichiometric ratio of 34.2:1.
source:
An oxygenated gasoline with 89% gasoline and 11% MTBE would then have a stoichiometric ratio of 14.281.
source:
I think this should be made a sticky to save time!! Thanks!Statistics: Posted by rotinaj13 — Mon Mar 14, 2005 7:48 pm
]]>