Reduction of CB05 mechanism according to the CSP method

In this work we are interested in the research and development of a useful tool to reduce the complexity of chemical mechanisms used in miscellaneous air quality models. We present a study of two methods to classify between species reacting at fast or slow rates. The first method is based on lifetimes of species and the second one is the so called Computational Singular Perturbation (CSP) technique. Both methods provide us with a criterion which allows some simplification of the chemical mechanism. In particular, we will take the core of the Carbon Bond mechanism (CB05) under the conditions in Mexico City. This means that we will introduce the adequate temperature profile and the photolytic contributions in the rates of reaction, in both the lifetime and the CSP method. We compare the corresponding criteria paying special attention to the results coming from the CSP method. Finally, our results show that the CSP method is a robust criterion to select the stationary species through the Integrated Pointers.