关键词: 催化裂化, 加氢, 循环油, 混合, 加氢蜡油

Abstract: The catalytic cracking performance of mixtures of HVGO and heavy fractions from different hydrotreated depths LCOs (denoted as HLCO-M, moderate depth hydrotreated LCO and HLCO-H, deep hydrotreated LCO)was investigated in a bench scale fixed fluidized bed device. The test results showed that, with increasing the ratio of the moderate depth hydrotreated LCO, the yields of dry gas, coke, LPG, and gasoline are gradually decreased compared with the calculation values of mixed feed with the same composition. When the HLCO-M mixing ratio is 90%, 50% and 10%, the dry gas yield decreases by 22.22%,13.13% and 3.17%, respectively, the coke yield decreases by 23.68%, 22.05% and 17.11%, respectively. For HLCO-H, the increase of mixing ratio causes the yield reduction of dry gas, coke and LPG, while the gasoline yield increases compared with the calculation values of mixed feed with the same composition. In case of HLCO mixing ratio of 90%, 50% and 10%, the dry gas yield decreases by 4.34%, 16.49% and 9.52%, respectively, the coke yield decreases by 10.52%, 30.16% and 29.30%, respectively.

Key words: FCC, hydrotreating, LCO, mixture, hydrotreated VGO