催化裂化汽油烯烃转化增产丙烯工艺研究

在装有条形ZRP催化剂的固定床反应器上，考察了催化裂化汽油在ZRP稀土改性催化剂上的反应性能，反应温度、空速、原料中水油比等工艺条件对催化裂化汽油烯烃转化率和低碳烯烃收率、选择性的影响。实验结果表明：ZRP稀土改性催化剂可选择性地将催化裂化汽油中C5～C8烯烃催化裂解，提高催化裂化汽油烯烃的转化率和丙烯的收率；反应的适宜温度为550-580℃；在保证烯烃转化率的条件下，适当提高反应空速可以获得较高的丙烯、乙烯收率；引入适量的水蒸气可以起到稀释作用，能够使反应平衡向丙烯方向移动。

Research on increasing propylene production by converting olefins in FCC naphtha

On the fixed-bed reactor loaded with strip ZRP catalysts, the impacts of reaction performance, reaction temperature, space velocity and oil to water ratio in the feedstock ere on olefin conversion of FCC naphtha, light olefin yields and selectivity were investigated. The results of demonstration tests show that, the ZRP rare earth modified catalyst can effectively crack C5-C8 olefins in FCC naphtha to increase olefin conversion and propylene yield in the temperature of 550-580 ℃. At the required olefin conversion, the higher propylene and ethylene yields can be obtained by properly increasing the volumetric space velocity, and the dilution by a proper amount of steam can move the reaction equilibrium to propylene.