Combustion and Emissions Characteristics of a Compression Ignition Engine Fuelled With N-Butanol Blends

Abstract

The use of biomass based renewable fuel, n-butanol blends for compression ignition (CI) engine has attracted wide attention due to its superior properties such as better miscibility, higher energy content, and cetane number as compared to other alternatives fuel. In this present study the use of n-butanol 10% blends (Bu10) with diesel fuel has been tested using multi-cylinder, 4-stroke engine with common rail direct injection system to investigate the combustion and emissions of the blended fuels. Based on the tested engine at BMEP=3.5Bar. Based on the results Bu10 fuel indicates lower first and second peak pressure by 5.4% and 2.4% for engine speed 1000rpm and 4.4% and 2.1% for engine speed 2500rpm compared to diesel fuel respectively. Percentage reduction relative to diesel fuel at engine speeds 1000rpm and 2500rpm for Bu10: Exhaust temperature was 7.5% and 5.2% respectively; Nitrogen oxides (NOx) 73.4% and 11.3% respectively.

Experimental investigation of combustion, emissions and thermal balance of secondary butyl alcohol-gasoline blends in a spark ignition engine

“…There are four types of butanol isomers: 1-butanol (i.e., n-butanol), 2-butanol, tert-butanol and isobutanol [15][16][17]. Each butanol has different physical and chemical properties based on different isomer structures.…”

Experimental Investigation on Performance, Combustion, Emission and Vibration Analysis of Diesel Engine Fuelled with Rice Bran Biodiesel and n-Butanol Additive

“…At medium loads, the addition of n-butanol affects the EGT and shows a decrease in CO, HC and smoke emissions. Yusri et al (2015) have used biomass-based fuel and n-butanol additive in a diesel engine to analyze the combustion and emission parameters at various engine speeds with constant BMEP. The combustion characteristics result in lower first and second peak pressure for both speeds by 2 to 5 %.…”