| 초록 |
The petrochemical industry uses various catalysts such as platinum-group metals (PGMs), metal oxide catalysts, etc. In particular, platinum-group metals (PGMs) have attracted much attention in the hydrogenation and dehydrogenation processes of petroleum chemistry due to their enhanced activity/selectivity, high melting point, and stability to oxidation. As the demand of PGMs catalysts increased, the recovery of spent catalysts is attracting attention. Typically, Palladium (Pd) in spent petroleum catalyst can recovered through hydrometallurgical process which is divided into noble metal dissolution, carrier dissolution, and total dissolution method. Herein, the leaching of Pd supported Al2O3 catalyst residue was performed based on the roasting-leaching process. The effects of the concentration of sodium hydroxide solution, calcined temperature and time on the alumina dissolution were investigated and optimized for recovery of Pd. |
