掺炼催化裂化柴油对蜡油加氢裂化反应的影响

研究了蜡油加氢裂化装置掺炼催化裂化柴油（简称催化柴油）对反应性能的影响。掺炼不同馏程催化柴油的研究结果表明：在相同反应条件下，随着催化柴油馏程的增加（馏程低的称为轻催柴，馏程高的称为重催柴），轻石脑油与重石脑油收率逐渐减小，重石脑油芳潜逐渐增大，喷气燃料收率先增大后减小，喷气燃料烟点逐渐降低，大于282 ℃尾油收率先减小后增大，尾油BMCI值逐渐升高；在相同反应条件下，随着轻催柴掺炼比例的增加，喷气燃料和重石脑油产率减小，重石脑油芳潜增大，喷气燃料烟点降低，大于282 ℃尾油的BMCI值逐渐增加；当轻催柴掺炼比例为30%时，尾油BMCI值为13.31，仍可作为优质的蒸汽裂解制乙烯的原料；在相同尾油收率下，随着轻催柴掺炼比例的增加，加氢裂化反应氢耗增加，轻石脑油、重石脑油收率降低，喷气燃料收率增加，重石脑油芳潜增大，喷气燃料烟点降低，尾油BMCI值增加。

INFLUENCE OF BLENDING DIFFERENT FCC DIESELS ON VGO HYDROCRACKING PERFORMANCE

The influence of mixing FCC diesels with different distillation ranges on VGO hydrocracking performance was investigated. It was found that under the same reaction conditions, as the FCC diesel becomes heaver，the yield of light and heavy naphtha decreased, and the latent aromatic of heavy naphtha increased gradually；the yield of jet fuel was increased first and then decreased, while the smoking point of jet fuel decreased；the yield of ＞282℃ bottom oil was decreased and then increased with increase of BMCI value. The experiment results demonstrated that under the same reaction condition, as light FCC diesel blending ratio increases，the yields of jet fuel and heavy naphtha decreased, the latent aromatic of heavy naphtha increased, the BMCI value of ＞282℃ bottom oil gradually increased. When the mixing ratio of light FCC diesel was 30%，the BMCI value of ＞282℃ bottom oil was 13.31，which can be applied as a high-quality feedstock for SCR. Under the same conversion rate, with the increase of light FCC diesel ratio，the hydrogen consumption of hydrocracking reaction increases, the yields of light naphtha and heavy naphtha decreased. The yield of jet fuel, latent aromatics of heavy naphtha and BMCI value of bottom oil were increased, but the smoking point of jet fuel decreased.