Gaseous and particle emissions from an ethanol fumigated compression ignition engine

Surawski, Nicholas C., Ristovski, Zoran, Brown, Richard J., & Situ, Rong (2012) Gaseous and particle emissions from an ethanol fumigated compression ignition engine. Energy Conversion and Management, 54(1), pp. 145-151.

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A 4-cylinder Ford 2701C test engine was used in this study to explore the impact of ethanol fumigation on gaseous and particle emission concentrations. The fumigation technique delivered vaporised ethanol into the intake manifold of the engine, using an injector, a pump and pressure regulator, a heat exchanger for vaporising ethanol and a separate fuel tank and lines. Gaseous (Nitric oxide (NO), Carbon monoxide (CO) and hydrocarbons (HC)) and particulate emissions (particle mass (PM2.5) and particle number) testing was conducted at intermediate speed (1700 rpm) using 4 load settings with ethanol substitution percentages ranging from 10-40 % (by energy). With ethanol fumigation, NO and PM2.5 emissions were reduced, whereas CO and HC emissions increased considerably and particle number emissions increased at most test settings. It was found that ethanol fumigation reduced the excess air factor for the engine and this led to increased emissions of CO and HC, but decreased emissions of NO. PM2.5 emissions were reduced with ethanol fumigation, as ethanol has a very low “sooting” tendency. This is due to the higher hydrogen-to-carbon ratio of this fuel, and also because ethanol does not contain aromatics, both of which are known soot precursors. The use of a diesel oxidation catalyst (as an after-treatment device) is recommended to achieve a reduction in the four pollutants that are currently regulated for compression ignition engines. The increase in particle number emissions with ethanol fumigation was due to the formation of volatile (organic) particles; consequently, using a diesel oxidation catalyst will also assist in reducing particle number emissions.

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ID Code: 50187
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Ethanol fumigation; Compression ignition engine; Gaseous emissions; Particle emissions; Oxidation catalyst
DOI: 10.1016/j.enconman.2011.10.011
ISSN: 0196-8904
Subjects: Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000) > ENVIRONMENTAL SCIENCE AND MANAGEMENT (050200) > Environmental Monitoring (050206)
Divisions: Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2011 Elsevier Ltd.
Copyright Statement: This is the author’s version of a work that was accepted for publication in <Energy Conversion and Management>. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Energy Conversion and Management, [VOL 54, ISSUE 1, (2012)] DOI: 10.1016/j.enconman.2011.10.011
Deposited On: 09 May 2012 22:46
Last Modified: 01 Jul 2017 12:52

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