The latest public report arising from the SmartCHP project has just been published – Report on the determination of the ignition and combustion characteristics of FPBO. The report, authored by The Technical University of Eindhoven (TU/e), evaluates the ignition and combustion characteristics of the FPBO (Fast-Pyrolysis Bio-Oil) in a combustion research unit equipped with a heavy-fuel oil injection system.
The deliverable is made available in our SmartCHP resource section – find it here.
In this deliverable, the ignition and combustion characteristics of FPBO are determined. A combustion research unit system, which is mainly composed of a constant volume combustion chamber, is used to provide the well-controlled initial ambient conditions and fuel injection parameters. Based on the combustion chamber pressure trace, the heat release rate and mass fraction burned results are calculated with several careful corrections, and the indicators used to evaluate fuel ignition and combustion characteristics are defined. For engine application purposes, the effects of fuel upgrade (addition of alcohol or ignition improver) and various biomass origins (wood, sawmill residue, sunflower husks, and miscanthus) are investigated. The influences of initial chamber pressure and injection pressure are also studied. The results show that compared to ethanol, the addition of 30% of n-butanol could significantly improve the ignition and combustion processes of FPBO. However, the gain of Beraid addition is very limited. Higher initial chamber pressure boosts the fuel combustion reaction, while the change of injection pressure has marginal influence. Regarding the different biomass origins, FPBO from wood and miscanthus has higher chemical reactivity than that from sawmill residue and sunflower husks.