Kinetics of the coke shrinkage process during calcination

The dimensional changes of raw isotropic and anisotropic coke occurring during calcination at 500–1200°C are examined under isothermal conditions using a high temperature dilatometer. The isothermal dimensional analysis is adapted to the coke shrinkage process by placing a coke sample into a dilatometer and measuring the expansion and contraction of the coke as a function of temperature and time. The apparent activation energy of the coke shrinkage process is computed from the experimental deformation rate data.