Key words: supercritical carbon dioxide, palladium chloride, complexes with organic ligands, solubility, catalyst, impregnation, regeneration
Solubility of palladium chloride complexes with organic ligands in supercritical carbon
dioxide (SC-CO2) is studied. The possibility of utilization of SC-CO2 for synthesis
and regeneration of supported palladium catalysts is examined. The solutions of palladium
chloride complexes with organic ligands in SC-CO2 were used for deposition of the
catalyst active component. The catalyst sample deactivated in the reaction (acethylene
hydrogenation in ethane-ethylene mixture) was also regenerated in SC-CO2 in a wide
range of parameters. The comparison of specific surface area values and activities of
fresh, used (deactivated) and regenerated samples demonstrates high competitive
power of the suggested methods utilizing SC-CO2 in comparison with traditional
ones used for catalyst regeneration.
doi:10.1134/S1990793109070094