Abstract
In this work, chemical kinetic simulations of equimolar (CO:H2=1:1) based forestry residual syngas were systematically performed adapting the laminar premixed flame model in open source CANTERA, solver. Three detailed kinetic models i.e., newly released FFCM-2, USC mech II, and modified GRI mech III were incorporated to report accurate flame parameters. The objective of the study is to evaluate kinetic models and present fresh insights on the effects of varying syngas mixtures such as CO/H2, CO/H2/CO2 and CO/H2/CH4 on Laminar Burning Velocity (LBV) and peak LBV location (π·πΏπ΅π=πππ₯) at normal and elevated temperatures. On comparing the results with experiments, FFCM-2 is emerged as good kinetic model for ternary syngas mixtures CO/H2/CH4 in a wide range of equivalence ratios, especially for mixture containing limited share of methane. The USC mech II performed well for CO/H2, CO/H2/CO2, while modified GRI mech III model gave agreeable predictions for CO/H2/CH4 mixture having rich methane content. The progressive CO2 dilution and CH4 addition reduced the peak LBV and moved the peak LBV locations to lean conditions; however, only the latter effect was enhanced at elevated initial temperature. The shift of peak LBV locations and their enhancement at elevated temperature also open the research path to study the underlying impacts on the flame modes/regimes and flame structure, especially CO emissions pathways in syngas with CH4 and CO2 additions.