To further determine the ideal components for the production of light aromatics from hydrotreated ligh cycle oil(LCO),a small-scale fixed fluidized bed pilot plant and pulse cracking test setup were used to compare the catalytic cracking reaction behaviors of hydrotreated LCO and indene at a reaction temperature of 580 ℃,and the catalytic cracking reaction pathways of indene were also investigated.The results show that being completely different from the catalytic cracking of hydrotreated LCO,indene mainly underwent condensation-dehydrogenation reaction to produce slurry and coke under these conditions,with the selectivity of condensation-dehydrogenation reaction up to 80％;next,hydrogen transfer reaction to produce indan occurred,with the selectivity twice that of the ring-opening cracking reaction to produce light aromatics.During the reaction,indene and indan were converted into each other through hydrogen transfer reaction,and the reaction temperature of indene near complete conversion was much lower than that of hydrotreated LCO catalytic cracking to produce light aromatics;the hydrogen transfer reaction to produce indan occurred mainly at low reaction temperature(460-520 ℃),and the condensation-dehydrogenation reaction to produce polycyclic aromatics and coke occurred mainly at high reaction temperature(520-640 ℃).The ring-opening cracking reaction to produce light aromatics does not play a dominant role,indicating that indene is not an ideal component for the production of light aromatics by hydrotreated LCO catalytic cracking.
关键词
加氢催化裂化柴油(LCO)/茚/催化裂化/轻质芳烃/缩合-脱氢反应/氢转移反应/反应路径
Key words
hytrotreated light cycle oil(LCO)/indene/catalytic cracking/light aromatics/condensation-dehydrogenation reaction/hydrogen transfer reaction/reaction pathway
维普
万方数据