喹啉对FCC汽油选择性加氢脱硫的影响

Influence of quinoline on the selective hydrodesulfurization of FCC gasoline

在原料油中加入喹啉,以Co/Mo物质的量比为0.6的CoMo-Al2O3作为催化剂,考察了喹啉对模型汽油选择性加氢性能的影响.结果表明:与不含喹啉的原料油相比,在相同脱硫率条件下,烯烃饱和率显著降低,加氢脱硫选择性大幅度提高;并且随着喹啉含量增加,脱硫率和烯烃饱和率降低.喹啉质量分数为1 500×10-6时,脱硫率相对较高,正辛烯不饱和率相对较低.对反应条件进行了优化,结果表明:原料油中喹啉质量分数1 500×10-6时,催化剂在温度为295℃、压力为1.6MPa、空速为2 h-1时选择性加氢性能较好,脱硫率在80%左右,正辛烯不饱和率达到23%.

Adding quinoline into material oil,and taking CoMo-Al2O3 as catalyst in which the ratio of n(Co) to n(Mo) is 0.6,the influence of quinoline on the selective hydrogenation performance of FCC gasoline is studied.The results show that,compared with the material oil without quinoline,the saturation rate of olefin significantly decreases and the selectivity of hydrodesulfurization greatly increases under the condition of the same desulfurization rate;with the increase of the content of quinoline,the desulfurization rate and the saturation rate of olefin decrease.The desulfuration rate is higher and the unsaturation rate of olefin is lower when the mass fraction of quinoline is 1 500×10-6.The reaction conditions are optimized.It is shown that when the mass fraction of quinoline in material oil is 1 500×10-6,the reaction temperature and pressure are 295 ℃ and 1.6 MPa separately,and a space velocity is 2 h-1,the selective hydrogenation performance of the catalyst is better,the desulfuration rate is about 80%,and the unsaturation rate of olefin can reach to 23%.