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COBEM 2019
25th International Congress of Mechanical Engineering
EFFECT OF THE FUEL COMPOSITION ON THE SYNGAS LAMINAR FLAME SPEED AT ELEVATED PRESSURES AND TEMPERATURES
Submission Author:
Gabriel Nagafugi de Souza Costa , SC
Co-Authors:
Gabriel Nagafugi de Souza Costa, Roberto Wolf Francisco Jr., Amir Antonio Martins Oliveira
Presenter: Gabriel Nagafugi de Souza Costa
doi://10.26678/ABCM.COBEM2019.COB2019-1490
Abstract
Biomass is an important source of renewable energy and its use has grown due to the low emissions of polluting gases into the atmosphere. Syngas, obtained from the biomass gasification process, has been the subject of scientific studies to replace fossil fuels. To understand the combustion of this alternative fuel, the laminar flame speed (LFS) needs to be determined. The LFS is an important combustion parameter of the fuel, which synthesizes physical and chemical phenomena, allowing the development and optimization of the combustion devices. Several studies of laminar flame speed were experimental and/or numerically developed. However, the wide range of syngas compositions allows more investigations. In this way, we propose to numerically investigate the effect of the syngas composition on the laminar flame speed in elevated temperatures and pressures. The simulations were performed using the CHEMKIN package and three chemical kinetic mechanisms. The syngas mixture was composted by CO, H2 and CO2 and N2. the equivalence ratio was 0.8 to 1.4. The results for the mixture preheating presented a proportional increase in LFS with the temperature. In contrast, the LFS decrease at elevated pressures. Higher laminar flame speeds were presented for the syngas with lower CO2+N2 amount.
Keywords
Syngas, laminar flame speed, chemical kinetic mechanism
