Half a croissant, on a plate, with a sign in front of it saying '50c'

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Pure Oxygen Engine
use an air separator to oxygen enrich input air
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This solves two problems and creates one and a half, the ionizing input air idea inspired it. Basically, there are these gadgets called "air separators" marketed by Shell-DEA. It's a membrane filter that can be used to create pure nitrogen by filtering out oxygen and water vapor. There are similar devices that do the same but produce oxygen. I am not sure how much energy it takes to drive air through these things but if you had highly oxygen enriched air it would increase combustion temperature and increase efficiency. If it were nearly pure O2, then there would be no nitrogen present to oxidize and there would be no NOx emmisions. The problem is not only the higher temperatures that the materials then have to take (high tech ceramics?), but the knocking of the motor. At running temperatures it is quite possible that gasoline would start burning directly after injection, or at least long before it should, so maybe other fuels would be better. Perhaps diesel, or even vegetable oil.

brewer, May 13 2004

oxygen enrichment http://www.halfbake...oxygen_20enrichment
Halfbaked: and it didn't do too well the first time... [ldischler, Oct 17 2004]

Oxy-fuel combustion http://en.wikipedia...Oxy-fuel_combustion
power plant with an oxygen-enriched gas mix [baconbrain, Mar 27 2008]

[link]






       Good idea. I was just going to post an idea involving a tank of liquid oxygen, which would do the same thing. Sadly, it takes insanely low temperatures to create liquid oxygen, making your idea more realistic than mine. That gets my bun!

Shadow Phoenix, Aug 30 2007
  

       One word: Boom!

Alterother, Mar 26 2008
  

       Got a cite for the "Shell-DEA air separator" ?

FlyingToaster, Mar 27 2008
  
      
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