多组分吸附剂级配技术提高FCC汽油吸附脱硫性能

以催化裂化汽油为研究对象，采用静态和动态吸附脱硫技术将不同金属离子改性分子筛单组分床层与多种分子筛级配床层的吸附脱硫性能进行对比，探讨级配床层中吸附剂的组合顺序和比例对脱硫效果的影响。结果表明：对于单组分而言，Al-Ti-SBA-15分子筛的吸附脱硫性能优于改性Y分子筛，两者总脱硫率相差28百分点以上；双组分级配时，从穿透曲线的结果来看，CeY/NiY组合的穿透曲线出现了一个平台，可能是吸附剂对各种硫化物的吸附和脱除出现了动态平衡，穿透速率较慢，则其脱硫性能最佳，而Cu(I)Y/NiY组合的脱硫性能次之；对于三组分吸附剂级配，m（CeY）: m（NiY）: m（Al-Ti-SBA-15）=1:1:4时穿透速率最慢，是脱硫性能较好的组合。

DESULFURIZATION PERFORMANCE OF GRADED MULTICOMPONENT ABSORBENTS FOR FCC Naphtha

The adsorptive desulfurization properties for FCC gasoline of different metal modified molecular sieve adsorbents in grading form by static and dynamic technique were conducted using FCC gasoline as raw material to investigate the effect of adsorbents combination sequence and their ratio. The results indicate that the desulfurization rate of Al-Ti-SBA-15 adsorbent is at least 28% higher than that of the modified Y zeolites. While the CeY/NiY combination exhibits a good desulfurization performance. Its breakthrough curve appears a platform, which indicates a dynamic balance between adsorption and removal of various sulfides and a lower breakthrough rate. And the Cu (I) Y/NiY desulfurization performance ranks the second. The combination of CeY: NiY: Al-Ti-SBA-15 with 1:1:4 (mass ratio) is the best which has the slowest breakthrough rate.