Preparation and chracterisation of Cu/ZnO and Pd/ZnO catalysts for partial oxidation of methanol. Control of catalyst surface area and particle size using microemulsion technique.

摘要

In this work, Cu/ZnO and Pd/ZnO catalysts for partial oxidationof methanol have been prepared by microemulsion technique. The microemulsion technique is a versatile preparation method, which enables control of catalyst surface area and particle size. The water-to-surfactant ratio (W_0) governs the water droplet size in the microemulsion and the influence of W_0 on catalyst properties was studied. It was found that CuO/ZnO surface areas as high as 87 m~2/g could be obtained by varying W_0 in the microemulsion. Furthermore, effective control of the Pd particle size (10-16 nm) was possible. The catalysts were characterised by TGA, BET, XRD and TEM.