I believe that two way converters work on the hydrocarbons and Carbon monoxide. However, I think that they do some conversion of Nitrogen oxides to Nitrogen.
However, most of the Nitrogen oxides are generated by the high temperature of combustion breaking down the N to N triple bonds. The nitrogen in the fuel can increase nitrogen oxides but most are formed due to high peak combustion temperatures. To control this, one must reduce combustion temperature. I have heard of water injection or using water in diesel emulsion to reduce peak combustion temperatures and thus reducing Nitrogen oxide formation. Years ago I heard of a new technology that used a gold catalyst in a strong electro magnetic field to reduce Nitrogen oxides to Nitrogen. But I have not kept up with the technology. tom -----Original Message----- From: Robert Del Bueno [mailto:[EMAIL PROTECTED] Sent: Thursday, August 19, 2004 1:44 PM To: biofuel@yahoogroups.com Subject: RE: [biofuel] NOX and catalytic converter use So does a 2 way catalytic converter have any effect on NOx, specifically with biodiesel usage? I am sure you see what I am getting at. NOx emissions combined with high ambient VOCs are very problematic for urban areas (specifically Atlanta, GA). In order to be able to really push biodiesel usage, the NOx rise must be addressed. I have also been looking into those various pre-combustion fuel catalysts..like the Fitch and the Rentar. Anyone had any experience with these?..they look to produce decent NOx reductions on petro-diesel. http://www.fitchfuelcatalyst.com/ http://www.rentar.com -Rob At 01:39 AM 8/20/2004 +0900, you wrote: >Hello Tom > >Nice to hear from you again, it's been awhile. > >I hope we can settle his question, I think quite a lot of biod users >want to know this. > > >I thought that gas catalytic converters required extra air (oxygen) to > >operate. Most gas engines will pump gas into the exhaust > >before the converter to convert hydrocarbons to water and CO2 (this chemical > >reaction requires Oxygen) Carbon Monoxide to CO2 > >(this chemical reaction requires Oxygen) the third reaction is Nitrogen > >Oxides to Nitrogen. > > > >The problem with the current Diesel fuel in the US is that the Sulfur > >present which will coat the insides of the converter. > >Does it do that or does it destroy the catalyst? > > >Like Leaded > >gas did in the early 1970's. > > > >Car makers have worked hard at getting better engines and converters but no > >one has looked at the source of the problem, sulfur in the > >fuel and guess what BIO D solves that problem!!!! > >Nobody wants to criticise the oil companies! Especially here in >Japan, to a quite bizarre extent, but it seems to be a general >malaise. The only time I've ever heard it suggested in any way >officially was in Hong Kong in 1996 when a legislator with close ties >to the tranport industry said: ""Why not just improve the existing >diesel fuel and reduce its particulates?" Everyone else politely >pretended she hadn't said it. > >Best wishes > >Keith > > > > > > >Tom > > > > > > > > > > > > -----Original Message----- > >From: Donald Allwright [mailto:[EMAIL PROTECTED] > >Sent: Wednesday, August 18, 2004 6:28 PM > >To: biofuel@yahoogroups.com > >Subject: Re: [biofuel] NOX and catalytic converter use > > > > > > > >--- Robert Del Bueno <[EMAIL PROTECTED]> wrote: > > > Can NOX emission increases from the use of biodiesel be successfully > > > dealt > > > with (at least brought back down to baseline) using a catalytic > > > converter > > > (in the event a vehicle uses sulfur free b100 only) ? > > > >The short answer - no. Petrol (gasoline) engines have a 3 way catalytic > >converter which can get rid of NOx, but this only works if there is no > >oxygen left in the exhaust. For this reason a stoichiometric mixture of > >fuel and oxygen is required. Diesel engines are lean-burn engines, > >which means that they have far more air present than a stoichiometric > >mix, and hence there is oxygen left in the exhaust. If a 3-way > >catalytic converter were fitted, it would actually combine the oxygen > >left with nitrogen and produce _more_ NOx emissions. For this reason, > >Diesel engines are fitted with 2-way catalytic converters, which are > >able to break down unburnt hydrocarbons very effectively. This is > >therefore unaffected by whether you are using petrodiesel or biodiesel. > > > > > >I'm not sure what the third catalyst in a 3-way CC does - it's been a > >few years since I studied engine operation! > > > >Hope that helps, > >Donald > > > >===== > >-- > >43 - slightly more than the answer to life, the universe and everything. > > > > > > > > > > > >___________________________________________________________ALL-NEW Yahoo! > >Messenger - all new features - even more fun! http://uk.messenger.yahoo.com > ><http://uk.messenger.yahoo.com> > > > > > > > >Biofuel at Journey to Forever: > >http://journeytoforever.org/biofuel.html > ><http://journeytoforever.org/biofuel.html> > > > >Biofuels list archives: > >http://infoarchive.net/sgroup/biofuel/ > ><http://infoarchive.net/sgroup/biofuel/> > > > >Please do NOT send Unsubscribe messages to the list address. > >To unsubscribe, send an email to: > >[EMAIL PROTECTED] > > > > > > > >Yahoo! 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