柴油超深度加氢脱硫催化剂级配技术的研究

为更好发挥柴油超深度加氢脱硫(RTS)不同反应区域内不同类型催化剂的优势,在中型试验装置上考察了加氢反应活性高的Ni-Mo-W型催化剂、直接脱硫反应活性高的Co-Mo型催化剂和具有轻微加氢改质活性的Ni-W型催化剂的不同级配方式对柴油超深度加氢脱硫反应的影响。结果表明:采用催化剂级配时与单独使用Ni-Mo-W催化剂时的超深度加氢脱硫效果相当;在第一反应器采用Ni-Mo-W型催化剂、第二反应器采用Ni-W型催化剂时,可有效降低加氢柴油产品的密度与多环芳烃含量;在第一反应器采用Ni-Mo-W型与Co-Mo型催化剂等体积比级配、第二反应器采用Co-Mo型催化剂的级配方案时,可有效降低柴油加氢反应的氢耗。

RESEARCH ON CATALYST GRADING TECHNOLOGY FOR ULTRA LOW SULFUR DIESEL PRODUCTION

In order to make better use of catalysts in different reaction regions of diesel ultra deep hydrodesulfurization technology（RTS）, in which two reactors in series were adopted，grading schemes for Ni-Mo-W type catalyst with high hydrogenation activity，Co-Mo type catalyst with high direct desulfurization activity，and Ni-W type catalyst with slight hydro-upgrading activity were compared in the pilot plant. The results showed that the effect of graded catalysts system on ultra-deep hydrodesulfurization was comparable to that of Ni-Mo-W catalyst alone. If Ni-Mo-W type catalyst was used in the first reactor and Ni-W type catalyst in the second reactor，the density and polycyclic aromatic hydrocarbon content of the product was effectively reduced. If the first reactor used Ni-Mo-W type and Co-Mo type catalyst in equal volume，and Co-Mo type catalyst was used in the second reactor，the hydrogen consumption could be effectively reduced.