Design Of The Domestic C302 Cu-based Catalyst Pellets For Low-pressure Methanol Synthesis

The catalyst pore structure has the considerable influence on the intraparticle diffusion, which largely affects the global reaction rates of methanol synthesis. Thus, the reasonable design for the catalyst pore structure is necessary.Taking the domestic C302 Cu-based catalyst for methanol synthesis as the researching object, six kinds of catalyst pellets with different pore structures were extruded by changing the pelleting pressure. A series of global reaction experiments have been carried out using CSTR in order to establish the relation between the catalyst pelleting pressure and its global properties. The experimental data indicates that the proper pelleting pressure exists, and the catalyst pellet extruded under this pressure has the maximum global reaction rate.By means of the steady state experimental method, the tortuosity factors of six kinds of catalyst pellets are determined respectively. Considering CO and CO2 competitive hydrogenation to form methanol as the independent stoichiometric reactions, the behavior of the single catalyst pellet under different industrial conditions is simulated via the orthogonal collocation method. Numerical solutions of the global reaction rates and effectiveness factors for methanol synthesis are obtained. Comparisons between experimental data and model calculated values indicate that this simulation method is feasible to describe and predict the intraparticle diffusion-reaction process of methanol synthesis over C302 catalyst.