The Chemical Reaction Rate of the Solusion Loss of Coke

Abstract

The chemical reaction rate of the solution loss with carbon dioxide was measured for conventional metallurgical coke and formed coke. The data for the rate obtained by the authors and other investigators were analyzed with several rate equations for the gasification of carbonaceous materials. The values of the apparent activation energy of the reaction obtained from these data were between 50 and 70 kcal/mol with the rate equations proposed by GADSBY, ERGUN, and TURKDOGAN-VINTERS. Furthermore, it was found that the values of the kinetic parameters were most uniform for all of these data with the Ergun equation, where the values of the apparent activation energy of the gasification and the enthalpy of the so called oxygen-exchange reaction were between 60 and 70 kcal/mol and between 14 and 17 kcal/mol respectively.
In the presence of any neutral gas, the Ergun equation was of lower precision, because of only one gas composition term, Pco₂/Pco in it. On the other hand, even in the presence of neutral gases, the rate could be expressed with a great precision by means of the Gadsby equation or the Turkdogan-Vinters equation; the latter was not so much precise as the former.