In chemical engineering simulations the prediction of spatial distributions of concentrations, velocity, temperature and pressure fields in a specified environment are well established. Recently, the simulation of material structure formation gains increasing interest. In this context, the pore structure is an important material property for a large number of processes and products, ranging from heterogeneous catalysts and adsorbents to porous membranes or fibers. The goal of the present work is to describe the structure evolution and hence formation of a porous system by detailed modeling of the underlying physical and chemical processes. Presently, the development of such material relies almost completely on experimental experience, driving the need for simulation based design.