| 초록 |
The sustainable production of p-Xylene (PX), a major chemical in petrochemical industry, from lignocellulosic biomass has attracted great attention in recent years. It has been shown that biomass-derived 2,5-dimethylfuran (DMF) can be converted into PX via a Diels-Alder (DA) reaction with ethylene over solid acid catalysts. The zeolite-based catalysts showed the high yield of PX due to their strong acidity. In this work, we investigated the activity of sulfated and phosphated catalysts supported on various oxides (e.g., SiO2, TiO2, ZrO2) for the DA reaction of DMF. Characterization of the prepared catalysts by FT-IR and NH3-TPD revealed that the acid strength and the concentration of acid sites were largely influenced by the type of the acid functionality and support used. The catalysis results indicated that the adequate acid strength and high concentration of acid sites lead to the enhanced PX yield. Overall, phosphated silica exhibited the highest PX yield of 79% at 250 ℃ and 6 h. |
