Surface chemistry Kinetics of heterogeneous chemical reaction

73 Surface chemistry Kinetics of heterogeneous chemical reactions 

The substance A can undergo at the droplet (or particle) surface after adsorption chemical conversion Aads Bads (Fig. 4.19). This chemical flux is given by Fhe, = khet cn)o- Using the adsorption equilibrium condition K = (cn)oI (Civ)g it follows that  

In the case that each surface striking of a gas molecule goes into surface chemical conversion - this is the steady state with Fhet = Fads we get  

This also represents the maximum heterogeneous chemical conversion rate, i. e. it is limited by the adsorption flux cn) is the gas phase molecule density. Mis the mol mass  

Note that this flux is normalized per unit area, and to convert it to the more chemical heterogeneous chemical rate Rhei (dimension concentration per time) we 

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