Quote:
Originally Posted by freebeard
That's what they do:
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Why take the extra steps (as well as energy ) to oligomerize into naphtha and paraffin? The next step would be to form gasoline or diesel. More energy and time! Just use the butanol as is! Use the di-methyl-ether (DME) as is!
Both butanol and DME have improved octane allowing higher compression ratios yielding more efficient engines. Both produce more active radicals in the pre-combustion breakdown allowing greater use of lean burn and exhaust gas re-circulation with less penchant for NOx ( nitrous oxides ) production and UHC (un-burned hydrocarbons ) formation.