Black Soot & more!

[SHOdded]

https://experts.umich.edu/en/publications/defeat-of-the-sootnox-trade-off-using-biodiesel-ethanol-in-a-mode

Defeat of the soot/NOx trade-off using biodiesel-ethanol in a moderate exhaust gas recirculation premixed low-temperature combustion mode
Haoyue Zhu, Stanislav V. Bohac, Zhen Huang, Dennis N. Assanis

Mechanical Engineering

Abstract
The soot/nitric oxides (NOx) trade-off of diesel, biodiesel, and biodiesel-ethanol in a moderate exhaust gas recirculation (EGR) premixed low temperature combustion (LTC) mode is investigated in this study. Compared to diesel, biodiesel demonstrates poorer spray behavior and shorter ignition delay, but its oxygen content results in less soot. Blending ethanol into biodiesel enhances spray behavior, prolongs ignition delay, and further increases fuel oxygen fraction, resulting in a larger reduction in soot. In the moderate EGR premixed low temperature combustion mode, an obvious soot/NOx trade-off is demonstrated with diesel fuel. The soot/NOx trade-off is improved by biodiesel fuel and defeated by the biodiesel-ethanol blend. Low soot, low NOx, and high combustion efficiency are achieved with the biodiesel-ethanol blend and proper EGR rate.

Original languageEnglish (US)
Article number091502
JournalJournal of Engineering for Gas Turbines and Power
Volume135
Issue number9
StatePublished - 2013

[92BlackGT]

my exhaust tips are as black as yours when using E10 91 tune. when I switch to my E20 tune the tips will actually mostly clean themselves after the first tank, i just have to scrub off the hard, stuck on stuff. after thats done the tips stay sparkly clean when using E20