Comparative investigation of ignition behavior of butanol isomers using constant volume combustion chamber under diesel-engine like conditions

Butanol is a sustainable carbon–neutral fuel that can be derived from variety of biomass resources. It potentially used as an alternative to blend with diesel decrease greenhouse gas and pollutant emissions. In this paper, three butanol isomers (n-butanol, tert-butanol, iso-butanol) are blended in various volume ratios. The combustion characteristics experimentally determined constant vessel under engine-like conditions. effects ratio, chamber temperature, pressure on ignition delay process investigated. shown the decreases at high temperature low ratio regardless isomer type. butanol/diesel blends differ neat butanol. Both heat release (LTHR) (HTHR) observed for isomers/diesel blends. Under current operating conditions, isomer/diesel ordered according iso-butanol > n-butanol tert-butanol. Notwithstanding its higher octane number, tert-butanol/diesel show fastest LTHR thereafter shortest delay. This because absence H atom alpha carbon which contributes consumption OH radicals. Consequently, oxidation less suppressed. However, HTHR much slower than n-butanol/diesel. At 80% required improve reactivity ignition. Overall, beneficial applied engines increase fuel/air mixing time so attenuate soot