A Reactive Diffusion Model for NO, NO2, O3 by an Approximation Method
1978 Volume 13 Issue 2 Pages 67-75
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1978 Volume 13 Issue 2 Pages 67-75
A simple reaction model of NO, NO2, O3, which can be easily combined with a general atmospheric diffusion model, has been presented. In this model, the common constants estimated directly from smog chamber experiments has been used without modification.
In the atmosphere near the source, conversion form NO into NO2 can be explained by only two or three chemical reactions. One of the characteristics of these reactions is the chemical conservations of (NO+NO2) and (O3+NO2). By taking advantage of these conservations, the diffusion equations have been separated from the chemical reacton equations. Then the concentrations of NO, NO2, O3 have been calculated by an approximation method.
The results as follows:(1) This approximation method has been in a good agreement with a more complex numerical model.(2) A comparison of the result of the method with observation data measured near the highway and also that with those of plumes from large souces have made satisfactory concordant results.
