Modeling the Auto-Ignition of Biodiesel Blends with a Multi-Step Model

Journal Article · Sat Jan 01 04:00:00 EST 2011 · Energy & Fuels

DOI:https://doi.org/10.1021/ef101238d· OSTI ID:1007831

Toulson, Dr Elisa ^[1]; Allen, Casey M ^[1]; Miller, Dennis J ^[1]; McFarlane, Joanna ^[2]; Schock, Harold ^[1]; Lee, Tonghun ^[1]

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1. Michigan State University, East Lansing
2. ORNL

There is growing interest in using biodiesel in place of or in blends with petrodiesel in diesel engines; however, biodiesel oxidation chemistry is complicated to directly model and existing surrogate kinetic models are very large, making them computationally expensive. The present study describes a method for predicting the ignition behavior of blends of n-heptane and methyl butanoate, fuels whose blends have been used in the past as a surrogate for biodiesel. The autoignition is predicted using a multistep (8-step) model in order to reduce computational time and make this a viable tool for implementation into engine simulation codes. A detailed reaction mechanism for n-heptane-methyl butanoate blends was used as a basis for validating the multistep model results. The ignition delay trends predicted by the multistep model for the n-heptane-methyl butanoate blends matched well with that of the detailed CHEMKIN model for the majority of conditions tested.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: ORNL LDRD Director's R&D
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1007831
• Journal Information: Energy & Fuels, Journal Name: Energy & Fuels Journal Issue: 2 Vol. 25; ISSN 0887-0624
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
AUTOIGNITION
CHEMISTRY
DIESEL ENGINES
ENGINES
IGNITION
IMPLEMENTATION
KINETICS
OXIDATION
REACTION KINETICS
SIMULATION
biodiesel
chemical kinetic modeling