Catalyst preparation using supercritical fluid precipitation
The use of supercritical fluids for the preparation of heterogeneous catalysts offers a number of potential advantages. In this chapter the properties of supercritical fluids in the context of catalyst preparation are discussed, and a number of techniques appropriate for the preparation of materials are presented. These techniques are based around precipitation and include supercritical anti-solvent and rapid expansion techniques, and the use of supercritical fluids as solvents and reactants. Examples of the various techniques are presented for catalyst preparation and where possible the advantages of using supercritical preparation have been discussed in the context of catalyst structure and performance.