High-pressure shock tube studies on graphite oxidation reactions with carbon dioxide and water

Heterogeneous reactions involving graphite particles reacting with gaseous carbon dioxide and steam were studied under high-pressure and high-temperature conditions. The high-pressure shock tube facility at the University of Illinois at Chicago was utilized to perform the heterogeneous experiments with post-shock pressures ranging from 209 to 363 atm, temperatures ranging between 1546 and 2692 K, and nominal reaction times of 1 ms. Graphite particles were injected into the shock tube, by means of a particle injector, containing mixtures of varying concentrations of H2O or CO2 in Ar as balance. The overall reaction rate coefficients from these graphite experiments have been calculated and compared to previous work performed with carbon black particles as well as theoretical and experimental values from prior investigators.