"Daniel J. Stern" > wrote in message
n.umich.edu...
> On Mon, 9 May 2005, Arif Khokar wrote:
>
> > > NOx emissions increase with ethanol vs. gasoline at any compression
> > > level.
>
> > I tried searching for some information on NOx emissions and came up with
> > conflicting information.
>
> The Denver-Metro area was the first major metropolitan area in the US to
> experiment with oxygenated fuels, starting in the late '80s. I lived
> there, and was very involved with the public hearings and scientific
> debate on the matter. There were plenty of differing opinions, but one
> drawback both sides agreed existed was the increase in NOx -- and
> resultant photochemical smog -- that was observable and measurable (and
> demonstrated and measured) with ethanol-blended gasoline compared to
> straight gasoline. The increase in NOx was larger with ethanol than with
> MTBE, ETBE or TAME, the non-ethanol (ether) oxygenates. For some years,
> the ethers were therefore the preferred oxygenates in that market, for
> Denver-Metro has not only a particulate problem but a photochemical smog
> problem.
>
> Then they found MTBE in the water, realised they hadn't specced good
> enough storage tanks and storage protocols, ADM jumped in and gave their
> customary pu$h for ethanol, which started showing up at the pumps again.
>
> DS

Did they test E85 or straight ethanol?