  We investigate a reaction-diffusion problem in a two-component porous medium
with a nonlinear interface condition between the different components. One
component is connected and the other one is disconnected. The ratio between the
microscopic pore scale and the size of the whole domain is described by the
small parameter $\epsilon$. On the interface between the components we consider
a dynamic Wentzell-boundary condition, where the normal fluxes from the
bulk-domains are given by a reaction-diffusion equation for the traces of the
bulk-solutions, including nonlinear reaction-kinetics depending on the
solutions on both sides of the interface. Using two-scale techniques, we pass
to the limit $\epsilon \to 0$ and derive macroscopic models, where we need
homogenization results for surface diffusion. To cope with the nonlinear terms
we derive strong two-scale results.
