Kinetics of Oxidation of Natural Organic Material in Clays

Authors:
Publisher website
Google Scholar
Abstract
The kinetics of burnout of natural organic matter in building clays were investigated. The results indicate that burnout occurs in two stages for extruded bodies. The temperature dependence of the reaction rate during the first stage was the same as that for the diffusivity of an O 2 /CO/CO 2 gas mixture. It is, therefore, postulated that gas diffusivity controls the reaction rate. The rate of the second stage of reaction followed parabolic kinetics and was independent of clay and temperature. It is suggested that back‐pressure of product gases builds up in the pores of the body and controls the reaction rate. This concept of the second stage is verified by the absence of the second stage when carbon is burned out of clay powder.

This publication has 3 references indexed in Scilit: