| 摘要 |
Catalytic cracking experiments were conducted in a circulating fluidized bed reactor using a proprietary QTCC catalyst, with an F-T gasoline fraction and a reforming aromatic raffinate as feedstocks. The effects of reaction temperature and space velocity on product distribution and liquid-phase properties were systematically investigated. The F-T gasoline fraction, rich in α-olefins (60.57%), is demonstrated to be an excellent feedstock for light olefin production. At 630 ℃ and a space velocity of 1.5 h-¹, the yield of ethylene plus propylene reached 41.10%, and the yield of ethylene, propylene plus butylene was up to 50.04%. Increasing the temperature to 670 ℃ further raised the ethylene plus propylene yield to 43.37%, with a liquid aromatic content of 79.20%. In contrast, the aromatic raffinate, characterized by high saturated hydrocarbon content, exhibited lower reactivity. At 645 ℃, its ethylene plus propylene yield was 27.53%, and the liquid aromatic content was 34.10%. Significant differences in cracking performance were observed between the two feedstocks. The F-T gasoline fraction is highly suitable for the high-yield production of light olefins and aromatics, while the aromatic raffinate requires intensified reaction conditions for efficient conversion. This study provides experimental evidence and technical support for the high-value utilization of these two light hydrocarbon streams. |
