Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6593969 | Combustion and Flame | 2018 | 12 Pages |
Abstract
Since the recent discoveries in the high efficiency production methods of 2,5-dimethylfuran (2,5-DMF) and 2-methylfuran (2-MF), and due to their good physicochemical properties, these alkylated furan derivatives have been highly considered as fuels or additives in gasoline and diesel engines. However, the cyclic structures of 2,5-DMF and 2-MF may make them effective soot precursors. We have recently studied the capacity of 2,5-DMF to form soot under different pyrolysis experimental conditions, in a flow reactor, and we now focus on the study of the capacity of 2-MF to form soot under the same conditions. In this way, a systematic investigation of the temperature and fuel concentration effects on the soot formed in the 2-MF pyrolysis was undertaken, in an atmospheric-pressure flow reactor, in the temperature range of 975-1475â¯K, and with 9000 and 18,000â¯ppm of 2-MF (inlet total carbon of 45,000 and 90,000â¯ppm, respectively). The increase in the soot yield is favoured by the rise in both the temperature and the inlet 2-MF concentration, while the gas yield decreases as the temperature increases without a noticeable influence of the inlet 2-MF concentration. A gas-phase chemical kinetic model was proposed to describe both the pyrolysis of 2-MF and 2,5-DMF. It was validated against the gas-phase data obtained in this work, as well as with a series of experimental data from literature including shock tube and flow reactors. Results show that 2-MF has a high capacity to form soot, and C4 species play a major role in the formation of intermediates that yield polycyclic aromatic hydrocarbons (PAH), well known as soot precursors. However, the soot yield in the 2-MF pyrolysis was found to be lower than that in the 2,5-DMF pyrolysis, mainly because, according to modelling results, during the 2,5-DMF pyrolysis the cyclopentadienyl radicals are highly formed, whose recombination yields directly naphthalene without any other intermediate.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Katiuska Alexandrino, Cristian Baena, Ángela Millera, Rafael Bilbao, MarÃa U. Alzueta,