焦化蜡油两段提升管催化裂解多产丙烯与焦化汽油改质研究

STUDY ON THE CATALYTIC PYROLYSIS OF COKER GAS OIL AND COKER NAPHTHA UPGRADING BASED ON TMP TECHNOLOGY

以焦化蜡油(CGO)和焦化汽油(CN)为原料,利用两段提升管催化裂解多产丙烯技术(TMP),在提升管催化裂化中试装置上考察TMP工艺条件下CGO的催化裂解性能,以及CGO催化裂解与CN改质的耦合反应性能。结果表明:TMP工艺对于CGO具有良好的适应性,两段反应综合转化率为87.80%;丙烯收率达到18.12%,选择性为64.87%;轻质油收率为37.19%,而干气产率仅为4.27%;CN单股进料催化裂化改质对辛烷值改善效果不好,而CGO催化裂解联合CN改质时效果较好,CN回炼率为25%时,产品汽油辛烷值可达90以上。

The catalytic pyrolysis performance of coker gas oil （CGO） and coupling with coker naphtha （CN） upgrading was investigated on a pilot plant riser unit under the process conditions of two-stage riser maximizing propylene （TMP） technology. Results showed that TMP technology displayed good adaptability to process CGO feed. The conversion of total two stage reactions reached 87.80% ,the yield and selectivity of propylene was 18.12% and 64.87%, respectively; the yields of light oil and dry gas were 37.19% and 4.27% ,respectively. However,the enhanced octane number of CN could only be ob- tained with the coupling of CGO catalytic pyrolysis and CN upgrading, not for single CN upgrading,with a 25 % CN in the combined feedstock of CGO and CN, the RON of obtained gasoline could be more than 90.