Numerical investigation on combustion of coal volatiles under various O2/CO2 mixtures using a detailed mechanism with soot formation

► We provide simulation on combustion of coal volatiles using an available soot model. ► Effects of temperature, pressure and O2/CO2 input on gas components are investigated. ► High CO2 concentration offers eliminated PAHs/soot at high temperature and pressure. ► If CO2 concentration is high, increasing temperature and pressure will increase CO. ► The results contribute to understanding of O2/CO2-blown near-zero-emission IGCC.