催化汽油和液化气混炼芳构化反应的研究

为降低汽油烯烃含量,充分利用炼厂中过剩的液化气,采用小型固定流化床对山东催化汽油和液化气进行芳构化实验研究.利用正交实验考察了反应温度、空速、剂油比和催化剂不同配比对芳构化产物分布的影响,并详细地分析了产物组成.实验结果表明,在最优条件下,山东催化全馏分汽油与液化气的轻油收率分别为92.2%和41.5%(质量分数),轻油中芳烃体积分数为40.6%和48.6%,烯烃体积分数为12.8%和28.8%,干气+焦炭为1.8%和4.0%(质量分数);催化汽油和液化气混炼(同时进料)时,其轻油收率和轻油中芳烃的含量低于汽油单独进料,先进汽油后进液化气的芳构化效果优于汽油和液化气混炼和先进液化气后进汽油,说明液化气的加入不利于汽油芳构化.

Aromatization reaction of Shandong catalytic gasoline and liquefied petroleum gas compound

By using Shandong catalytic gasoline and liquefied petroleum gas as feedstock,the effects of reaction temperature,weight hour space velocity (WHSV),catalyst to oil weight ratio and different ratios of catalyst on the product distribution of aromatization were researched in a confined fluidized bed reactor in orthogonal experiments. And the composition of aromatized gas and liquid was analyzed in detail. The experimental results show that Shandong catalytic gasoline’s light oil yield in the optimizing condition is 92.2%,the aromatics yield in light oil is 40.6%,the olefin amount is less than 15%,the off-gas and coke’s amount is less than 2%,and a small amount of vapor added can improve the light oil yield; Shandong liquefied petroleum gas’s light oil yield is 41.5%,its aromatics and olefin amount are 48.6% and 28.8% respectively,and off-gas and coke yield is 4.0%. When Shandong catalytic gasoline is refined together with liquefied petroleum gas,the light oil yield and aromatics amount in light oil are less than those in Shandong catalytic gasoline refined only. Liquefied petroleum gas addition is not beneficial to aromatization,and the aromatization effect for entering Shandong catalytic gasoline after entering Shandong liquefied petroleum gas is better than that entering Shandong catalytic gasoline and liquefied petroleum gas together or entering liquefied petroleum gas after entering Shandong catalytic gasoline.