微反色谱法研究助剂LBO-A对催化裂化汽油改质反应的影响

USING MICRO-REACTOR AND GAS CHROMATOGRAPH COMBINED APPARATUS TO STUDY THE EFFECT OF LBO-A CO-CATALYST ON FCC NAPHTHA UPGRADING

在自制的微反-色谱联合实验装置上,改变反应温度、停留时间、剂油比等反应条件,考察助剂 LBO-A 对抚顺催化裂化汽油改质反应的影响。以 LBO-A 助剂为催化剂,催化裂化汽油改质反应的优化操作条件为:反应温度420～450℃,停留时间0.024 s,剂油比6。在450℃的优化条件下,催化裂化汽油改质后,烯烃质量分数由40.74%降至25.80%,异构烷烃和芳烃含量有较大幅度的增加,计算辛烷值 RON 提高了5.48个单位,汽油收率降低了14.25个百分点,液化气收率提高了13.52个百分点。

The effect of LBO-A co-catalyst on FCC naphtha upgrading was studied using a selfmade micro-reactor and gas chromatograph combined apparatus by changing the reaction temperature, residence time and catalyst to oil ratio. The optimum operation conditions for FCC naphtha upgrading were obtained as follows： the reaction temperature was within the range of 420-450℃ ,a residence time of 0. 024 s and a weight ratio of catalyst to oil of 6. Tests of FCC naphtha upgrading were conducted under such optimum reaction conditions （with a reaction temperature of 450℃）, as compared with the untreated naphtha the olefin content of the treated naphtha decreased from 40. 74% to 25. 80%, the contents of isoparaffin and aromatics increased significantly, the computed octane number（RON）was 5.48 unit higher, yet the naphtha yield dropped 14. 25 percentage points and the LPG yield increased 13.52 percentage points.