The impact of n-butanol and iso-butanol as components of butanol-acetone (BA) mixture-diesel blend on spray, combustion characteristics, engine performance and emission in direct injection diesel engine

Algayyim, Sattar Jabbar Murad and Wandel, Andrew P. ORCID: https://orcid.org/0000-0002-7677-7129 and Yusaf, Talal and Hamawand, Ihsan (2017) The impact of n-butanol and iso-butanol as components of butanol-acetone (BA) mixture-diesel blend on spray, combustion characteristics, engine performance and emission in direct injection diesel engine. Energy, 140. pp. 1074-1086. ISSN 0360-5442


Abstract

This article assesses the impact of n-butanol (nB) and iso-butanol (isoB) as components of a butanol-acetone (BA) mixture on spray, combustion, engine performance and emission characteristics. The macroscopic spray characteristics including spray penetration, spray cone angle and spray volume of n-/iso-BA-diesel blends were measured at two injection pressures 300 bar and 500 bar. A direct visualisation technique high speed camera was used to analyse the images that were obtained. The spray results show that both n- and iso-BA-diesel blends achieved a slightly higher penetration distance compared to pure diesel, resulting in a better fuel-air distribution and mixing. Two blend ratios (10% and 20%) of iso- and n-BA-diesel blends were tested in a single-cylinder DI diesel engine at three engine speeds: 1400, 2000 and 2600 rpm at full load. The engine performance included measuring the following parameters: pressure inside the combustion cylinder; brake power (BP); and brake specific fuel consumption (BSFC). The exhaust gas emissions included measuring the following parameters: exhaust gas temperature (EGT); oxide of nitrogen (NOx); unburnt hydrocarbons (UHC); carbon monoxide (CO); and carbon dioxide (CO2). The results from the blended diesel with iso- and n- BA were also compared to pure diesel as a baseline. The results for 10 iso-BA-90 diesel showed a slight improvement in BP by 4% at medium speed, while the BP of 20iso-BA-diesel, 10 and 20 n-BA-diesel was slightly lower and comparable with pure diesel at all engine speeds. The highest peak in-cylinder pressure was measured for the iso-BA-diesel blends. BSFC and BTE were increased for both iso- and n-BA-diesel blends. CO emission reduced with the increase in both n-BA and iso-BA ratios in diesel blend. Both NOx emissions and EGT were decreased at all n-BA and iso-BA-diesel blends compared to pure diesel. UHC and NOx emissions concentration of n-BA-diesel blends were lower compared to that of the iso-BA-diesel blend. Thus, it can be concluded that iso-BA-diesel blends showed slight improvement in brake power and higher in-cylinder pressure, while n-BA-diesel blends resulted in lower emission levels in regard to NOx and UHC. Therefore, using n-BA and iso-BA blended together as an additive for diesel fuel could be a suitable blend to obtain optimum results in regard to engine performance.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 -)
Date Deposited: 24 Oct 2017 23:57
Last Modified: 02 May 2018 04:08
Uncontrolled Keywords: butanol-acetone mixture, iso-butanol, n-butanol, spray characteristics, diesel engine performance and emissions
Fields of Research (2008): 09 Engineering > 0913 Mechanical Engineering > 091303 Autonomous Vehicles
Fields of Research (2020): 40 ENGINEERING > 4007 Control engineering, mechatronics and robotics > 400703 Autonomous vehicle systems
Identification Number or DOI: https://doi.org/10.1016/j.energy.2017.09.044
URI: http://eprints.usq.edu.au/id/eprint/33253

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