Abstract
Ethanol is known as the most widely used alternative fuel for spark-ignition engines. Compared to it, butanol has proved to be a very promising renewable fuel in recent years for desirable properties. The conjoint analysis on combustion, performance, and emissions characteristics of a port fuel injection spark-ignition engine fueled with butanol–gasoline blends was carried out. In comparison with butanol–gasoline blends with various butanol ratio (0–60 vol% referred as G100~B60) and conventional alcohol alternative fuels (methanol, ethanol, and butanol)–gasoline blends, it shows that B30 performs well in engine performance and emissions, including brake thermal efficiency, brake-specific fuel consumption, carbon monoxide, unburned hydrocarbons, and nitrogen oxides. Then, B30 was compared with G100 under various equivalence ratios ( Φ = 0.83–1.25) and engine loads (3 and 5-bar brake mean effective pressure). In summary, B30 presents an advanced combustion phasing, which leads to a 0.3%–2.8% lower brake thermal efficiency than G100 as the engine was running at the spark timing of gasoline’s maximum brake torque (MBT). Therefore, the sparking timing should be postponed when fueled with butanol–gasoline blends. For emissions, the lower carbon monoxide (2.3%–8.7%), unburned hydrocarbons (12.4%–27.5%), and nitrogen oxides (2.8%–19.6%) were shown for B30 compared with G100. Therefore, butanol could be a good alternative fuel to gasoline for its potential to improve combustion efficiency and reduce pollutant emissions.
Highlights
With the increasing concern on the shortage fossil oil supply and the need for environmental protection, more and more attentions have been paid to renewable fuel in the past few decades.[1]
Gu et al.[20] tested five blended ratios (G100 (i.e. B0 in this article), B10, B30, B40, and B100), and the results showed that the unburned hydrocarbons (UHC) and carbon monoxide (CO) emissions of blends were lower than those of gasoline, and besides, pure n-butanol increased the UHC and CO emissions compared to those of gasoline
The conjoint analysis of combustion, performance, and emissions characteristics of an SI engine fueled with butanol–gasoline blends was carried out through the experimental investigation
Summary
With the increasing concern on the shortage fossil oil supply and the need for environmental protection, more and more attentions have been paid to renewable fuel in the past few decades.[1]. Alcohols, such as ethanol, methanol, butanol, and so on, sometimes referred to as oxygenates, have been extensively utilized in internal combustion (IC) engines. In comparison with ethanol and methanol, butanol has higher viscosity, which will cause problems including potential fuel deposit or erosion to spark-ignition (SI) engines, and besides, its lower octane number will require smaller compression ratio as well as lower combustion efficiency and lower combustion efficiency will increase the emission of greenhouse gas carbon dioxide (CO2); butanol has a number of desirable properties for use in gasoline engines. Butanol is less prone to water contamination As a result, it could be distributed with the same infrastructure used to transport gasoline. Butanol has a lower latent heat and vapor pressure, octane number, and higher heating value, and so on, which make it a viable alternative to ethanol.[8,9,10,11] Researchers expected that butanol would become an attractive, economical, and sustainable fuel as petroleum oil nearly and that may explain the increasing studies on butanol in recent years
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
