A three-point bending test was performed on a coke sample, which was cut into a flat plate, under the simulated blast furnace conditions with CO2 or H2O gasification reaction using a thermomechanical analyzer. In addition, the X-ray CT images of the coke samples were taken before and after the gasification reactions, and the changes in their internal structure were evaluated. As a result, it is shown that the difference in the changes in the pore structure caused by the rate-controlling step of the reaction affects the coke strength under the blast furnace condition.
