Laminar flame speeds of H 2 /CO with CO 2 dilution at normal and elevated pressures and temperatures

Demarcation of reaction effects on laminar burning velocities of diluted syngas–air mixtures at elevated temperatures

“…However, to our knowledge, the effects of high concentration (60, 70%) of CO 2 in the syngas/air mixtures have not been thoroughly investigated. Specifically, only comparable work is by Han et al., and they emphasize the need for work at elevated temperatures, higher CO 2 dilutions, and near extinction limits.…”

“…Laminar burning velocity is one of the parameters that govern the combustion process and provides information regarding the mixture reactivity, diffusivity, and exothermicity . The importance of this parameter has led to the development of different steady and flame propagation based measurement techniques.…”

“…The importance of this parameter has led to the development of different steady and flame propagation based measurement techniques. The various methods in practice are constant‐volume combustion bomb (expanding spherical flame), heat flux method, Bunsen burner, and externally heated diverging channel method …”

“…Han et al . measured laminar flame speeds of syngas mixtures with CO 2 dilution at various temperatures (298, 375, and 450 K) and elevated pressures (0.1, 0.5, 1 MPa) using the spherical flame propagation method.…”

“…A linear decrease in flame speed was observed with an increase in CO 2 dilution. Based on the kinetic calculations, Han et al . reported that increasing pressure and higher CO 2 dilution enhanced direct reaction effect and third‐body reactions.…”