Reactivity Controlled Compression Ignition Combustion and Emissions Using N-Butanol and Methyl Oleate
Document Type
Article
Publication Date
12-15-2018
Publication Title
Energy
DOI
10.1016/j.energy.2018.09.181
ISSN
0360-5442
Abstract
Direct Injection of methyl oleate and PFI of n-butanol were used to conduct Reactivity Controlled Compression Ignition (RCCI) and minimize exhaust emissions in reference to conventional diesel combustion. Methyl oleate was investigated for validation of a single fatty acid methyl ester as a surrogate for biodiesel in engine operation. An experimental common rail engine was operated in RCCI and conventional diesel combustion modes under constant boost and similar combustion phasing. The RCCI strategy used two pulses of direct injections with a fixed first injection at 60° before top dead center and a varied second injection for smooth combustion. Ringing intensity was reduced by 70% for methyl oleate RCCI compared to diesel conventional diesel combustion. The molecular oxygen from methyl oleate allowed a reduction in soot by 75% and 25% compared to diesel in RCCI and conventional diesel combustion operation, respectively. Compared to conventional diesel combustion, NOx and soot decreased for RCCI by several orders of magnitude with both emissions approaching near zero levels at low load. The fuels produced a stable RCCI operation where mechanical efficiency was sustained within 2% for same-load points and the coefficient of variation of indicated mean effective pressure was limited to 2.5%.
Recommended Citation
Soloiu, Valentin, Jose D. Moncada, Remi Gaubert, Aliyah R. Knowles, Gustavo Molina, Marcel Ilie, Spencer Harp, Justin T. Wiley.
2018.
"Reactivity Controlled Compression Ignition Combustion and Emissions Using N-Butanol and Methyl Oleate."
Energy, 165B: 911-924: Elsevier.
doi: 10.1016/j.energy.2018.09.181 source: https://reader.elsevier.com/reader/sd/pii/S0360544218319546?token=1B3310FB8CDB94EB266F6F49546206912D26529CCF35CA041E58E741101C419981B228BAC435A140E1F731E861BD4F6B
https://digitalcommons.georgiasouthern.edu/mech-eng-facpubs/137
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