:A Study on Rate Equations

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Kinetics of coal liquefaction have been studied for years by many investigators and a variety of reaction models based on the experimental results from batch reaction systems has been proposed.<BR>Besides these, a model commonly applicable to these data was proposed by Chiba et al., which was derived by assuming the coal to be composed of two kinds of fractions different in reactivity.<BR>Recently, a rate equation available for the experimental results from a plug flow reactor and from complete mixing reactor was presented by assuming the existence of an unconvertible component [or an equilibrium conversion] in coal to pyridine or benzene solubles for the results in continuous flow reactors.<BR>In the present study, the rate equations derived by applying the concept of the existence of an unconvertible component were found to be well applicable to the reactions of coal to n-hexane solubles as well as coal to pyridine or benzene solubles concerning to our results obtained by using a c. s. t. reactor and also to the reported data from the batch system.<BR>A simple graphic method was presented in this paper to determine a rate costant and a fractional ratio of the unconvertible component for the rate equation applicable to the reaction in a complete mixing type reactor.
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