Non-Isothermal Analysis of Hydrogenation Rate of Coal

概要

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Many investigations of coal hydrogenation have heen carried out with batch autoclaves operated under non-isothermal conditions. Kinetics of the reaction, however, has been analyzed in a way similar to that for isothermal reaction. 1) This report points out that there are some cases where such analysis can not give us correct values of rate constants. 2) Therefore, theexperimental rgsults of the hydrogenation with batch autoclaves must be regarded as non-isothermal data, and should be analyzed as such. An analytical method, which can treat non-isothermal data, is proposed. Results so far studied by the conventional way were analyzed by the new one to obtain the values of the kinetic parameters in rate equations. Simulation of the reaction by these values gave good agreement with the experimental results. 3) Reaction characteristics under the experimental condition in the reports discussed can be explained by the following mechanism: (1) Coal1→Oil (2) Coal2→Asphaltene→Oil. Thus far it has been unknown what kind of component in starting coal would contribute to the individual reactions. According to the analyzed results obtained here, the former and the latter reactions seem to correspond mainly to the oil formations from volatile matter and fixed carbon components, respectively.
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