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The rate constants of many high temperature elementary reactions were compiled and critically evaluated by Dr. Baulch et al., and they recommended the most reliable rate parameters together with the error limits and the temperature range of validity. The results were originally issued from the University of Leeds and later published as monographs from Butterworth. These publications are very valuable. However, if we are too sensitive to the reliability of rate data, the temperature range of validity becomes narrower and the equations recommended by these monographs are not applied without modifying the original form to the temperature range from 300 to 2500K, where the most of the combustion reactions in air take place. That is, when we extrapolate the original Baulch's equation to outside the recommended range without necessary precautions, the large amount of error will happen. Under these circumstances we feel that it is better and the more convenient to use an equation of less accuracy but having a wider limiting temperature range than Baulch's equation. Accordingly we tried to obtain the alternative expression which describes the rate constants from 300 to 2500K and if it is impossible at least from 1500 to 2500K, by a single equation. To attain this object, sometimes when it seems not erratic, we expand the temperature range a little wider, but in most cases following technique was used successfully. That is, if there exist only insufficient data for the forward reaction rate constant k_f, we calculate the rate expression k_f from the reverse reaction rate constants k_r by using the relationshin between rythe equilibrium constant K_c and both rate constants: K_c=k_f/k_r. The whole of these rate data were used to derive the simple exprcession for the forward rate constant. This treatment is useful to expand the temperature range, since in most of the reaction systems only one of the forward or reverse reaction was studied in greater detail at the lower temperature range, and the other was investigated thoroughfully at the higher temperature range, or vice versa.
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燃焼反応に関する速度定数について

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