Experimental study of two-stage riser FCC reactions

✍ Scribed by Hong-hong Shan; Hui-jie Dong; Jian-fang Zhang; Gen-lin Niu

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 116 KB
• Volume: 80
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/s0016-2361(00)00187-3

✦ Synopsis

The concept of two-stage riser (TSR) ¯uid catalytic cracking (FCC) was tested in the laboratory. The goals were to improve product distribution and increase product yield. A series of FCC runs was carried out in a pilot unit. At a similar conversion level, the results showed that the TSR FCC was better than the one-stage riser (OSR). The yields of gasoline and light oil increased by 2±3% and 3±4%, respectively, and the gas decreased. The research and motor octane numbers of gasoline from the TSR FCC were higher than those from the OSR FCC by 2±3 and 1±2 units, respectively. Compared with the one-stage FCC, the gasoline produced from the TSR FCC contains less alkene and more iso-alkane.