| 초록 |
Various physical and chemical treatment were studied to recycled the deactivated SCR catalysts that will used as raw materials for SCR catalyst re-preparation. For removal of clogging materials, physical treatment was carried out using air washing, H2O washing, ultrasonic, air washing&ultrasonic. While chemical treatment was performed through acid(HCl, HNO3, H2SO4 and organic acids) and base solution(NaOH, NH4OH) for recovery of precious metals(V, W)/TiO2 by removing the poisoned materials. Several solutions were applied to optimized the recovery process and recovered precious metals(V, W)/TiO2 were characterized as the N2 adsorption-desorption, X-ray fluorescence(XRF), X-ray diffraction(XRD), scanning electron microscopy(SEM) and deNOx conversion. |
