Hello Winfried, I heard that NOx from biodiesel was a problem from a paper titled: Biodiesel: The Use of Vegetable Oils and Their Derivatives as Alternative Diesel Fuels. The paper was authored by: Gerhard Knothe, Robert O. Dunn, and Marvin O. Bagby who were sponsored by: Oil Chemical Research, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, Peoria, IL 61604
I've lost the URL to the paper but you should be able to find with a google search using the information above. Here is the claim from that paper: <start quote> It is generally recognized that biodiesel has lower emissions, with the exception of nitrogen oxides (NOx), than conventional petroleum-based DF. For example, due to its lack of sulfur, biodiesel does not cause SO2 emissions. The lower emissions have caused biodiesel to be used in urban bus fleets and to make it especially suitable for other niche markets such as mining and marine engines. Besides environmental and health reasons with accompanying Government regulations, focusing on the use of biodiesel in niche markets is rendered additionally attractive because not enough vegetable oil is produced to supply the whole diesel market with biodiesel. Numerous reports exist showing that fuel economies of certain biodiesel blends and conventional DF are virtually identical. In numerous on-the-road tests, primarily with urban bus fleets, vehicles running on blends of biodiesel with conventional DF (usually 80% conventional DF and 20% biodiesel; for a list of most biodiesel demonstration programs in the United States, see Ref. 6) required only about 2-5% more of the blended fuel than of the conventional fuel. No significant engine problems were reported as discussed later. <end quote> As to the claim's validity, I have not a clue and that is why I asked Edward at Neoteric for his data, to either support of discount it. To date, Edward hasn't replied. Ted Swarts Kelowna, British Columbia ----- Original Message ----- From: "Winfried Rijssenbeek" <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Tuesday, December 18, 2001 3:31 AM Subject: Re: [biofuel] Re: Biofuel efficiency > Hello Ted, > > I am working on a study on biodiesel in developing countries and indeed > found this concern about higher NO2 emissions. Can you refer me to that > Swedish study. The information seems to be conflicting: some say that > biodiesel does not have more NO2 emissions than the petrodiesel, and that > the emissions are a function of the temperature? > > Winfried > > ----- Original Message ----- > From: Ted Swarts <[EMAIL PROTECTED]> > To: <biofuel@yahoogroups.com> > Sent: Friday, December 14, 2001 9:20 PM > Subject: Re: [biofuel] Re: Biofuel efficiency > > > > Hello Edward. > > > > During your tests, were the NO2 emissions from the Biofuels also 50% less > > than pertroDiesel? > > > > If my memory serves me, NO2 emissions from BioDiesel were higher during > > tests in Sweden as compared to their premium petroDiesel. > > > > Its my understanding that NO2 plays a significant role in gound level > ozone > > as well as acid rain (nitric acid). > > > > Ted Swarts > > Kelowna, British Columbia > > > > ----- Original Message ----- > > From: "Neoteric Biofuels Inc." <[EMAIL PROTECTED]> > > To: <biofuel@yahoogroups.com> > > Sent: Friday, December 14, 2001 9:45 AM > > Subject: Re: [biofuel] Re: Biofuel efficiency > > > > > > > There is certainly less in the way of emissions studies for SVO than > > > biodiesel. However, I can tell you that as part of my thesis research I > > had > > > the opportunity to have a VW Jetta tested on various fuels at a major > > > research facility. > > > > > > For the usual EPA emissions (HC, CO, NOx, CO2) SVO and WVO both came in > > at > > > no significant difference to results for commercial biodiesel. > > > > > > For opacity, all the alternative fuels tested (biodiesel, new Canola, > and > > > WVO) came in ~ 50% lower than petrodiesel. > > > > > > Note that the petrodiesel used was a premium diesel, not regular diesel, > > was > > > sold at a higher price than regular diesel, and contained additives > > > purported to reduce opacity, clean injectors, etc. It was run for > several > > > months prior to these tests, and compared qualitatively against regular > > > diesel and SVO. The premium diesel did appear to reduce opacity in those > > > observations compared to regular diesel. > > > > > > Therefore, the ~50% reductions recorded at the test facility might have > > been > > > even greater if we had used regular diesel as the baseline. > > > > > > --- > > > > > > Also in looking at emissions tests, one thing to keep in mind is that if > > an > > > engine that has been in service is tested, the biodiesel could clean out > > > existing deposits in conditioning and calibration runs, and if those are > > run > > > after the diesel tests, and deposits on injectors are cleaned off from > the > > > solvent effect of biodiesel, it might have an influence on results. It > is > > > important to look at several studies and read through the test > conditions, > > > order of tests, pre-test conditioning, number of runs, type of engine, > > > ambient temp., type of diesel fuel used, type of biodiesel, type of > SVO > > > (straight vegetable oil) , type and condition of WVO (waste vegetable > > oil), > > > whether any other exhaust after-treatment was used (catalytic > converters). > > > > > > --- > > > > > > Then there's the non-regulated emissions and various products of > > combustion > > > (another day!)...and ultimately a reality check on whether the picture > of > > > individual emissons and combinations are an improvement compared to > > > status quo on diesel and petrol emissions (overall smog forming > potential > > > instead of looking just at NOx, for example), whether there are global > > > emissions benefits (eg.CO2 reduction on life cycle basis), energy > > efficiency > > > of the production process (SVO being better than biodiesel being better > > than > > > petrodiesel), content of renewables (SVO essentially being 100%, > > biodiesel > > > containing 20% or so methanol - usually... and usually from > non-renewable > > > natural gas sources), emissions/pollution of > > > production/transportation/refining/distribution versus local production > > and > > > sale, and the extent of any other social, economic, and environmental > > > benefits of the various fuels. > > > > > > > > > IMO, re: overall emissions for biodiesel or SVO overall benefits - I > have > > to > > > say that SVO seems to come out ahead. Here are a couple of links that > > > support that view: > > > > > > Note that that organization is mostly interested in the production and > > use > > > of new oil at the farm or local level from seed, particularly winter > > > rapeseed, and associated use of the seedcake as a portion of feed versus > > > imports of soy meal. So that all becomes part of the equation as well. > > > > > > It all gets to be quite interesting (!) and it can great fun to bore > > people > > > with the details of your reading and watch their eyes glaze over. People > > you > > > really don't want to chat long with at Christmas parties are good > targets > > > for such discussions, leaving more time to mull over the details in your > > > head whilst sipping punch and nibbling on shortbread cookies with > > > unidentified sparkly things on them. > > > > > > ;-) > > > > > > http://www.folkecenter.dk/plant-oil/plant-oil_en.htm > > > > > > http://www.folkecenter.dk/plant-oil/pressr_rapeseed_08112001.htm > > > --- > > > Edward Beggs > > > www.biofuels.ca > > > --- > > > > > > > > > > > > > > > > From: Tim Helweg-Larsen <[EMAIL PROTECTED]> > > > > Organization: Lycos Mail (http://mail.lycos.com:80) > > > > Reply-To: biofuel@yahoogroups.com > > > > Date: Fri, 14 Dec 2001 13:01:33 +0100 > > > > To: biofuel@yahoogroups.com > > > > Subject: [biofuel] Re: Biofuel efficiency > > > > > > > > Hi Scott, > > > > I am new too. I write from England and I am on my way to selling my > > petrol car > > > > and sorting out a biofuel dieslel. > > > > There is a company here in England, the only one in fact which makes > and > > sells > > > > biodiesel comercialy. I think they have a proprietary manufacturing > > method and > > > > their biodiesel has a higher cetane number (58) than regular diesel > > (51). I > > > > think this means it gives more power and better MPG. > > > > > > > > On a similar note, does anyone have any data or know where I can see > > some for > > > > the efficiency and emissions levels of Striaigt Vegetable Oil (PS is > > this what > > > > you mean by SVO?). I keep bumping into data for biodiesel and regular > > diesel > > > > but cant find any data on straight veg oil. I am trying to choose > > between > > > > making BD or modifying my car. > > > > > > > > Thanks, > > > > Tim Helweg-Larsen > > > > > > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > > > http://journeytoforever.org/biofuel.html > > > > Please do NOT send "unsubscribe" messages to the list address. > > > > To unsubscribe, send an email to: > > > > [EMAIL PROTECTED] > > > > > > > > Your use of Yahoo! Groups is subject to > > http://docs.yahoo.com/info/terms/ > > > > > > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > > http://journeytoforever.org/biofuel.html > > > Please do NOT send "unsubscribe" messages to the list address. > > > To unsubscribe, send an email to: > > > [EMAIL PROTECTED] > > > > > > Your use of Yahoo! Groups is subject to > http://docs.yahoo.com/info/terms/ > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > http://journeytoforever.org/biofuel.html > > Please do NOT send "unsubscribe" messages to the list address. > > To unsubscribe, send an email to: > > [EMAIL PROTECTED] > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > > > > > > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > Please do NOT send "unsubscribe" messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > > ------------------------ Yahoo! Groups Sponsor ---------------------~--> Need new boots for winter? Looking for a perfect gift for your shoe loving friends? 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