Testing in a single cylinder direct-injection spark-ignition (DISI) test engine comparing ethanol, gasoline and 2,5-dimethylfuran (DMF), using the optimized spark timings for each fuels, found that DMF produces competitive combustion and emissions qualities to gasoline, which, in some cases surpass ethanol. (Earlier post.)
Recent work has improved the high yield conversion of biomass-derived carbohydrates to DMF, and there is growing interest in using this as a bio-based substitute for petroleum-derived gasoline. DMF has a volumetric energy density similar to that of gasoline formulations and 40% greater than that of ethanol.
The paper by the team from the University of Birmingham (UK), Newcastle University (UK), and Xi’an Jiaotong University (China) is in press in the journal Fuel.
The two biofuels have a higher burning rate and lower initial combustion duration than gasoline. They also produce greater combustion efficiency, which helps to lower hydrocarbon and carbon monoxide emissions. These initial results highlight how DMF, which was originally only considered as an octane improver, has the potential to become a competitive renewable gasoline alternative.—Daniel et al.
Ritchie Daniel, Guohong Tian, Hongming Xu, Miroslaw L. Wyszynski, Xuesong Wu, and Zuohua Huang (2010) Effect of spark timing and load on a DISI engine fuelled with 2,5-dimethylfuran. Fuel, in press doi: 10.1016/j.fuel.2010.10.008