The thermal stability problems with biodiesel mainly occurs when the biodiesel consists from highly unsaturated fatty acids. When mixing it with DINO, the problem should disappear, because a good diesel stock should be treated with anti-oxidating agents. These agents can be added to the biodiesel directly, of course. Jan Warnqvist AGERATEC AB
[EMAIL PROTECTED] + 46 554 201 89 +46 70 499 38 45 ----- Original Message ----- From: "Arden B. Norder" <[EMAIL PROTECTED]> To: <Biofuel@sustainablelists.org> Sent: Tuesday, July 19, 2005 7:38 AM Subject: RE: [Biofuel] Re: CUMMINS B5.9TD > Reading this is beginning to make me nervous. I have been researching biodiesel > production and considering building around biodiesel and glycerin. > > I have only one question (mainly because I was planning to run B100): When > can/should I run B100 without blowing up my engine or meltin my fuel lines or > gumming up the fuel pump and injectors. > > I am totally in love with my Peugeot HDi diesel - I don't want to end its' life > prematurely. HELP!!! > > Greetings, > Arden > > On Jul 19, 2005 01:49 AM, James G. Branaum <[EMAIL PROTECTED]> wrote: > > > In one of my many conversations with a fuels specialist, he strongly > > suggested that BD has some thermal stability problems when used in over a > > 10% mix with Petro. He has the degree and over 20 years experience in the > > field since I first met him. > > > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of > > [EMAIL PROTECTED] > > Sent: Monday, July 18, 2005 4:47 PM > > To: Biofuel@sustainablelists.org > > Subject: Re: [Biofuel] Re: CUMMINS B5.9TD > > > > > > > > ----- Original Message ----- > > From: Doug Memering <[EMAIL PROTECTED]> > > Date: Saturday, July 16, 2005 9:40 pm > > Subject: [Biofuel] Re: CUMMINS B5.9TD > > > > > > > > > > Any of which can be replaced on an as needed basis. Terry's > > > mechanic> > should be a little more specific with him, rather than > > > issuing a > > > > > sweeping and perhaps unsupported statement. > > > > > > Perhaps I can shed some light on this topic, as I am an engineer > > > at Cummins > > > Inc, and work in Fuel System Development. > > > Officially, Cummins supports Biodiesel blends up to B5 or 5% > > > Biodiesel.There are several concerns the company has with higher > > > ratio blends. There > > > are three major areas of concerns that the company has. These are > > > mostlycommercial concerns which will be evident as I explain them > > > any of which an > > > individual could deal with by being aware and careful about what > > > they put > > > into their tank. > > > > > > First, while biodiesel is touted as being cleaner, there are some > > > caveats.While the particulate emissions (the ones you can see) are > > > considerablyimproved with biodiesel, the NOx emmission will > > > increase and the higher the > > > biodiesel ratio the higher the NOx increases. Up to B5 the > > > increase will > > > not likely move the engine's NOx emissions beyond the federal > > > limit, but B20 > > > and higher will likely move the NOx emissions "outside of the > > > box". Since > > > the US tends to hold the manufacturers repsonsible for the > > > emissions of the > > > engines instead of the users the company must maintain a strict policy > > > against recommending or accepting fuels that will violate the > > > regulations. > > > Second, biodiesel has a lower heating value than Petro diesel, > > > therefore the > > > higher the biodiesel blend the lower the available power from the > > > engine.Most vehicles with B5.9 diesel are substantially > > > overpowered so the driver > > > may not notice the 2% loss of power with a B5 blend, but it will > > > become more > > > noticeable as the ratio is increased. As I said many of the vehicles, > > > especially pickups are overpowered for the job they do, so you it > > > wouldlikely not be bothered unless you are street racing or > > > pulling a large > > > (heavy) trailer through the mountains. But once again as a > > > company Cummins > > > is in the position that if the sell a 305 Hp engine and the > > > customers tend > > > to expect to get 305 Hp regardless of what fuel they chose to put > > > in the > > > tank. > > > > > > The third and more serious concern for us homegrown biodieselers, > > > in my > > > opinion, is water. Most tanks collect water, many vehicles are > > > equippedwith water separation filters to protect the fuel system > > > components. The > > > problem is the biodiesel has a higher affinity for water than > > > petrol diesel, > > > so the biodiesel is going to carry the water out of the tank. > > > Furthermore,the water separators that are normally used will NOT > > > extract the water from > > > biodiesel so the water gets carried into the fuel system. Most > > > modern fuel > > > systems are very sensitive to water. The engine will run > > > initially but the > > > internal fuel system components will quickly corrode which will > > > lead to a > > > fuel system failure, and usually an expensive one. > > > > > > The company is also concerned about the quality of the biodiesel > > > coming on > > > the market. They have a wide variety from some very high quality > > > to some > > > very poor quality and currently there are no recognized quality > > > standardthat the commercial producers are going by. > > > > > > There are other concerns with blending biodiesel with the coming > > > Ultra Low > > > Sulfur Diesel (ULSD). It has a few challenges to overcome but I > > > will not go > > > into the details here. > > > > > > With all that said, my personal observation (not the view of > > > Cummins) is > > > that if you pay attention to what you are putting in your tank > > > qaulity wise. > > > You make sure that it is dry. Then you should not have any > > > problems with > > > the fuel system of the age mentioned. The timing does not need to be > > > changed in order for the engine run, however you will be producing > > > more NOx > > > than you were with petrodiesel. You will likely see degradation > > > of non > > > metal lines in the fuel system and you have to replace all of them > > > at some > > > point. Return lines are probably the first ones you will notice. > > > I believe > > > most vehicles run steel lines for the supply lines from the tank > > > to the > > > engine. > > > > > > I am brewing my own biodiesel and running it in my 94 Cummins 5.9L > > > dieseland I intend to eventually run on straight biodiesel. I > > > know the risks and > > > will watch things carefully. > > > > > > I hope this helps > > > > > > Doug > > > > > > > > > > > > _______________________________________________ > > > Biofuel mailing list > > > Biofuel@sustainablelists.org > > > > > http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.or > > g > > > > > > Biofuel at Journey to Forever: > > > http://journeytoforever.org/biofuel.html > > > > > > Search the combined Biofuel and Biofuels-biz list archives (50,000 > > > messages):http://www.mail-archive.com/biofuel@sustainablelists.org/ > > > > > Dear Doug, I didnt catch what year ctd you were talking about, but I > > have a 98 24 valve that I have been running a 50-50 blend for about a > > year. Is this bad for the vp-44 even if the fuel is dry? > > dear doug, i> > > > > _______________________________________________ > > Biofuel mailing list > > Biofuel@sustainablelists.org > > http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org > > > > Biofuel at Journey to Forever: > > http://journeytoforever.org/biofuel.html > > > > Search the combined Biofuel and Biofuels-biz list archives (50,000 > > messages): > > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > > > > > > > > > _______________________________________________ > > Biofuel mailing list > > Biofuel@sustainablelists.org > > http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org > > > > Biofuel at Journey to Forever: > > http://journeytoforever.org/biofuel.html > > > > Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): > > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > > > > _______________________________________________ > Biofuel mailing list > Biofuel@sustainablelists.org > http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > > _______________________________________________ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
