Impact of finite-rate kinetics on carbon conversion in a high-pressure, single-stage entrained flow gasifier with coal-CO2 slurry feed

► Gasification kinetics in a high pressure gasifier with coal-CO2 slurry feed were studied. ► 1-D reduced order model with validated Langmuir-Hinshelwood kinetic expression used. ► Carbon conversion is 7% lower than for a gasifier with water slurry feed. ► CO inhibition and mass transfer limitations responsible for slower kinetics in high-CO2 environment. ► Oxygen savings drop by half to 8% when slower kinetics accounted for.