A reduced primary reference fuel (PRF)-alcohol-di-tert-butyl peroxide (DTBP) mechanism with 108 species and 435 reactions, including sub-mechanisms of PRF, methanol, ethanol, DTBP, and the four butanol isomers, is proposed for homogeneous charge compression ignition (HCCI) engine combustion simulations of butanol isomers/nheptane mixtures. HCCI experiments fueled with butanol isomer/n-heptane m...

Reactivity-controlled compression ignition (RCCI) is a promising energy conversion strategy to increase fuel efficiency and reduce nitrogen oxide (NOx) soot emissions through improved in-cylinder combustion process. Considering the significant amount of conducted research development on RCCI concept, majority work has been performed under steady-state conditions. However, most thermal propulsio...

Combustion phasing is the main obstacle to the development of controlled auto-ignition based (CAI) engines to achieve low emissions and low fuel consumption operation. Fuel combinations with substantial differences in reactivity, such as diesel/compressed natural gas (CNG), show desirable combustion outputs and demonstrate great possibility in controlling the combustion. This paper discusses a ...

At present, it is highly required from the automobile sector to develop clean technologies with lower fuel consumption for ambient air quality improvement, green house gas reduction and energy security. Furthermore, due to continuously stringent emission legislation and the fast depletion of the primary energy resources, the development of new highly efficient and environment friendly combustio...

The thermal reactivity and kinetics of four coal chars (HVN, UM, SAB and BA) in an oxy-fuel combustion atmosphere (30%O2-70%CO2) were studied using a thermobalance. The coal chars were obtained by devolatilization in an entrained flow reactor (EFR) at 1000 oC for 2.5 s under 100% N2 and CO2 atmospheres. The reactivity tests were carried out by isothermal thermogravimetric analysis at different ...

Driven by the Paris agreement and tightening IMO regulations, marine sector is focusing on lowering engine emissions moving to low-carbon fossil or renewable fuel such as methane. The dual-fuel concept allows usage of methane main energy-source in diesel engines. A small pilot injection acts an ignition source for premixed It was investigated how NOx formation, mainly taking place during combus...

There is a growing concern about the feasibility of new generation internal combustion engines in low-temperature and efficient way that can meet emission regulations while maintaining desirable power performance. This requires controllability flexibility over ignition reactivity within cylinder by handling two fuels with different chemical reaction intensity. In this research, controlled compr...

various combustion characteristics and properties are studied while selecting a fuel for any engine. the choice of the engine and fuel are highly interrelated. vegetable oil is one obvious fuel particularly because their fuel properties are closer to diesel fuel. two important properties, the cetane number and the calorific value are similar to diesel. hence diesel engines can be operated on ve...