Mathematical simulation of thermal decomposition processes in coking polymers during intense heating
- Mendeleev Academy of Chemical Technology, Moscow (Russian Federation)
Description of nonstationary heat transfer in heat-shielding materials based on cross-linked polymers, mathematical simulation of chemical engineering processes of treating coking and fiery coals, and designing calculations all require taking thermal destruction kinetics into account. The kinetics of chemical transformations affects the substance density change depending on the temperature, the time, the heat-release function, and other properties of materials. The traditionally accepted description of the thermal destruction kinetics of coking materials is based on formulating a set of kinetic equations, in which only chemical transformations are taken into account. However, such an approach does not necessarily agree with the obtained experimental data for the case of intense heating. The authors propose including the parameters characterizing the decrease of intermolecular interaction in a comparatively narrow temperature interval (20-40 K) into the set of kinetic equations. In the neighborhood of a certain temperature T{sub 1}, which is called the limiting temperature of thermal decomposition, a decrease in intermolecular interaction causes an increase in the rates of chemical and phase transformations. The effect of the enhancement of destruction processes has been found experimentally by the contact thermal analysis method.
- OSTI ID:
- 88731
- Journal Information:
- Doklady Physical Chemistry, Vol. 339, Issue 1-6; Other Information: PBD: Dec 1994; TN: Translated from Doklady Akademii Nauk; 339: Nos. 1-3, 507-509(1994)
- Country of Publication:
- United States
- Language:
- English
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