  The reaction of volatile matter plays an important role in the process of
bringing matter from the surface of the planet to the atmosphere. Therefore, by
simulating the mixing and chemical reaction process of volatile matter in the
atmosphere during volatilization and diffusion from the planet surface, the
concentration distribution of different components in the atmosphere can be
studied, which is the problem to be solved in this paper. This paper discusses
the diffusion and reaction of simple components in one-dimensional scale from
the diffusion process of volatile matter and the reaction process in the
atmosphere. The diffusion and reaction models of volatile matter were
established, and the basis of the model was given.
