| 초록 |
A series of modified Al-MCM-41 supports, to which 1-9% lanthanum was added, served as supports to prepare the Mo/La-Al-MCM-41 catalysts containing 10wt% molybdenum. The supports and catalysts were characterized by XRD, BET, FT-IR, XPS, TPR, TPD, TEM and SEM, and their catalytic activities were tested for thiophene hydrodesulfurization. The La addition did not cause any significant collapse of the structure and morphology of Al-MCM-41 samples, and increased the acidity of Al-MCM-41 samples. The Mo/La-Al-MCM-41 catalysts showed higher thiophene HDS activity than non-modified catalysts. The La-modified catalysts showed an enhanced butene selectivity but a decreased tetrahydrothiophene selectivity, indicating that the La-Al-MCM-41 supports contained a strong acidity. |
