Abstract

PEREZ-GORDILLO, David Sebastian  and  MANTILLA-GONZALEZ, Juan Miguel. Evaluative analysis of reaction mechanisms to model the combustion of biomass derived gases. Rev. ion [online]. 2022, vol.35, n.1, pp.132-147.  Epub July 30, 2022. ISSN 0120-100X.  https://doi.org/10.18273/revion.v35n1-2022009.

A fundamental part in the simulation of combustion processes is to model as accurately as possible the chemical kinetics that take place in the phenomenon. On the other hand, in complex combustion simulations that involve the computational fluid dynamics (CFD) of the system, the computational resource is a critical factor to consider. Based on the above, this study evaluates the performance of four semi-detailed reaction mechanisms (DRM22, C1-C4 from Heghes, GRI 3.0 y Konnov), to model the combustion kinetics of biomass derived syngas in CFD simulations (engines, turbines, burners, among others). The methodology consisted of computational tests to obtain results related to ignition delay. These simulations were carried out in a constant pressure reactor varying different combustion parameters. The results obtained with the semi-detailed mechanisms were compared with those achieved using a detailed mechanism (Westbrook), through the calculation of errors. It was found that the applicability of each kinetic model depends on the process variables analyzed, where the quality of their predictions is always inversely proportional to the hydrogen content in the fuel. It should be noted that the GRI 3.0 mechanism presented the best overall performance.

Keywords : Biomass; Syngas; Combustion; Chemical kinetics; Reaction mechanism; Ignition delay.

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