两段提升管催化裂解多产丙烯专用催化剂LCC-300的工业应用

在分析两段提升管催化裂解多产丙烯工艺特点的基础上研制出两段提升管催化裂解专用LCC-300催化剂。使用LCC-300催化剂，以大庆常压渣油为原料，在单段提升管反应装置上进行模拟两段提升管试验。结果表明，在丙烯收率22.27％的情况下，总液体收率为80.08％，所产汽油的烯烃含量低、芳烃含量高，为高辛烷值汽油调和组分。在TMP工业试验装置上使用配套LCC-300催化剂，一段提升管采用混合C4与大庆常压渣油组合进料，二段提升管为回炼轻汽油、回炼油和回炼油浆组合进料，装置标定结果表明，在丙烯收率20.38％的情况下，总液体收率为82.95％，干气和焦炭收率之和仅为13.99%，说明LCC-300催化剂在多产丙烯、减少干气和焦炭生成方面具有优势。

INDUSTRIAL APPLICATION OF LCC-300 CATALYST FOR ENHANCING PROPYLENE YIELD IN TWO-STAGE RISER CATALYTIC PYROLYSIS OF HEAVY OIL

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.