| 초록 |
In oil refining and petrochemical processes, chemically-refractory heavy aromatic hydrocarbons such as LCO (light cycle oli) from FCC unit and C10+ heavy-aromatics from p-xylene plants are produced in large quantities as by-products. The development of catalytic process to produce BTX from these by-products could be a new BTX production process. In this study, various metallic components (Ni, NiSn, NiW-S, CoMo-S and NiMo-S) with different hydrogenation (HYD) activities were supported on H-Beta or hybrid zeolites (BZ(x), where x denotes the weight percentage of H-ZSM-5 in the physical mixture of H-Beta and H-ZSM-5). These bifunctional catalysts were applied to the hydrocracking (HYC) of tetralin in a fixed-bed down-flow reactor as a model reaction for polycyclic aromatic hydrocarbon (PAH) conversion to high-value BTX. From the results of tetralin HYC, the CoMo-S/BZ(10) and NiMo-S/BZ(10) catalysts, where the metallic and acidic functions and structural properties of the zeolite are well balanced, showed promise as selective HYC catalyst for the hydroconversion of PAHs into BTX mixtures in high yield. |
