关键词: 两段提升管, 催化裂解, 丙烯, 催化剂

Abstract: LCC-300 catalyst was developed for the two-stage riser catalytic pyrolysis of heavy oil based on analyzing the characteristics of said pyrolysis process. The evaluation tests of LCC-300 catalyst were carried out on a single riser reaction device to simulate the two-stage riser catalytic pyrolysis using atmospheric residue (AR) as feedstock. Test results showed that the total liquid yield reached 80.08%, in which propylene yield was 22.27%, and the obtained naphtha was high in aromatics and low in olefins, which could be a high octane gasoline blending component. The industrial application of LCC-300 catalyst was conducted on TMP industrial trial unit, mixed C4 and Daqing AR were used as combined feedstock for 1st stage riser, 2nd stage riser used a combined feedstock of recycle light naphtha, recycle oil and recycle slurry. The results of performance test showed that the total liquid yield reached 82.95%, in which propylene yield was 20.38%, and the yield of dry gas and coke was only 13.99%, which indicated that LCC-300 catalyst was good at increase propylene yield and decrease the formation of dry gas and coke.

Key words: two-stage riser, catalytic pyrolysis, prolylene, catalyst