Laminar Burning Velocity and Ignition Delay Time of Oxygenated Biofuel

Abstract

The need for lowering the environmental impacts has incentivized the investigation of biomass and biofuels as possible alternative sources for energy supply. Among the others, oxygenated bio-derived molecules such as alcohols, esters, acids, aldehydes, and furans are attractive substances as chemical feedstock and for sustainable energy production. Indeed, the presence of oxygen atoms limits the production of aromatic compounds, improves combustion efficiency (thus heat production) and alleviates the formation of carbon soot. On the other hand, the variability of their composition has represented one of the major challenges for the complete characterization of combustion behaviour. This work gives an overview of the current understanding of the detailed chemical mechanisms, as well as experimental investigations characterizing the combustion process of these species, with an emphasis on the laminar burning velocity and the ignition delay time. From the review, the common intermediates for the most relevant functional groups and combustion of biofuels were identified. The gathered information can be intended for the sake of core mechanism generation.

Investigation of Combustion Characteristics, Physical and Chemical Ignition Delay of Methanol Fuel in a Heavy-Duty Turbo-Charged Compression Ignition Engine

“…In experimental and simulation studies of methanol-fuelled engines, Vapor phase 0 Initial state a significant parameter is the ignition delay, as it affects the engine performance like maximum pressure and maximum HRR, and the emissions of carbon monoxide and nitrogen oxides, etc [13,14]. Ignition delay refers to the time from the start of the fuel injection (SOI) into the combustion chamber to the time when a cold flame appears in the combustion chamber, or the pressure increases due to the heat from combustion [15,16]. The delay includes a physical delay and a chemical delay.…”