Exploring the combustion chemistry of anisole in laminar counterflow diffusion-flames under oxy-fuel conditions

Biomass combustion under oxy-fuel conditions, i.e., burning biomass by using CO2/O2 mixtures as oxidizer instead of air, is a promising approach to mitigate climate change recycling CO2 from the exhaust gas. Understanding chemistry can further help achieve higher efficiency and lower emissions in future design concepts. In this work, we investigated anisole, potential component surrogates for volatiles, two selected laminar counterflow diffusion flames conditions. A time-of-flight molecular-beam mass-spectrometer (ToF-MBMS) gas chromatograph with mass spectrometer (GC–MS) were used analyze chemical compositions gaseous samples at various flame positions. The combined measurements allowed us identify quantify over 40 species, including many polycyclic aromatic hydrocarbons (PAH) oxygenated (OPAH). Comparing experimental results numerical simulations latest kinetic model Yuan et al. (Combust. Flame 2019, 201, 187–199), found that some (e.g., phenylacetylene, styrene, ethylbenzene), PAH molecules, naphthalene acenaphthylene), OPAH molecules cresol, benzofuran, dibenzofuran) overpredicted model. analysis indicated reaction rate coefficients may be responsible. Tentative updates showed improvement on predictions naphthalene, acenaphthylene. summary, work provides comprehensive speciation datasets measurement techniques, examines anisole diffusion-flames, novel insights