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The impacts of mid-level biofuel content in gasoline on SIDI engine-out and tailpipe particulate matter emissions : preprint

Author: Xin He; National Renewable Energy Laboratory (U.S.)
Publisher: [Golden, CO] : National Renewable Energy Laboratory, [2011]
Series: Conference paper (National Renewable Energy Laboratory (U.S.)), NREL/CP-5400-49311.
Edition/Format:   eBook : Document : National government publication : EnglishView all editions and formats
Summary:
The influences of ethanol and iso-butanol blended with gasoline on engine-out and post three-way catalyst (TWC) particle size distribution and number concentration were studied using a turbocharged spark-ignition direct-injection engine. Particle size distribution in the range of 5.6 to 560 nm was measured. U.S. federal certification gasoline (E0), two ethanol-blended fuels (E10 and E20), and 11.7% iso-butanol  Read more...
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Material Type: Document, Government publication, National government publication, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: Xin He; National Renewable Energy Laboratory (U.S.)
OCLC Number: 704296499
Notes: Title from title screen (viewed February 28, 2011).
"Presented at the SAE 2010 Powertrains, Fuels and Lubricants Meeting, San Diego, California, October 25-27, 2010."
"February 2011."
Description: 1 online resource (20 pages) : color illustrations.
Details: Full text available via Internet in .pdf format. Adobe Acrobat Reader required.
Series Title: Conference paper (National Renewable Energy Laboratory (U.S.)), NREL/CP-5400-49311.
Responsibility: Xin He [and others].

Abstract:

The influences of ethanol and iso-butanol blended with gasoline on engine-out and post three-way catalyst (TWC) particle size distribution and number concentration were studied using a turbocharged spark-ignition direct-injection engine. Particle size distribution in the range of 5.6 to 560 nm was measured. U.S. federal certification gasoline (E0), two ethanol-blended fuels (E10 and E20), and 11.7% iso-butanol blended fuel (BU12) were tested at 10 selected steady-state engine operation conditions. Bi-modal particle size distributions were observed for all operating conditions with peak values at particle sizes of 10 nm and 70 nm. Idle and low-speed/low-load conditions emitted higher total particle numbers than other operating conditions. At idle, the engine-out particulate matter emissions were dominated by nucleation mode particles. The TWC reduced these nucleation mode particles by more than 50%; the accumulation mode particle distribution was unchanged. At an engine load higher than 6 bar net mean effective pressure, accumulation mode particles dominated the engine-out particle emissions, and the TWC had little effect. Compared to E0, E10 did not significantly change PM emissions, while E20 and BU12 reduced PM emissions. Isobutanol was observed to impact PM emissions more than ethanol, with up to 50% reductions at some conditions.

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