渣油选择性加氢脱硫技术研究

RESEARCH ON SELECTIVE HYDRODESULFURIZATION TECHNOLOGY OF RESIDUE

以中东高硫渣油为原料,从催化剂开发、工艺条件优化、催化剂级配及活性稳定性考察等角度深入研究并开发了渣油选择性加氢脱硫技术。结果表明:新开发的渣油选择性加氢脱硫催化剂(包括专用脱金属剂和专用脱硫剂)的加氢脱硫活性显著高于常规渣油加氢催化剂(包括相应的常规脱金属剂和常规脱硫剂);在加氢生成油硫含量相当的情况下,合适的氢分压、较低的体积空速、较高的氢油比以及较低的反应温度可以提高脱硫选择性;与常规渣油加氢脱硫技术相比,在脱硫率相当的情况下,新开发的渣油选择性加氢脱硫技术的反应温度低7℃,加氢生成油的残炭升高率为11.5%,加氢过程的氢耗降低率为7%-11%。

The selective hydrodesulfurization technology of residue from the Middle East high-sulfur crude was deeply researched and developed from the aspects of catalyst development,process condition optimization,catalyst gradation and activity stability.The results showed that the hydrodesulfurization activity of the newly developed hydrodemetallization and hydrodesulfurization catalysts for selective hydrodesulfurization of residue was significantly higher than that of conventional hydrodemetallization and hydrodesulfurization catalysts.When the sulfur content of the hydrogenated oil was equal,proper hydrogen partial pressure,lower volumetric space velocity and higher hydrogen-to-oil ratio,as well as lower reaction temperature could improve the hydrodesulfurization selectivity.Compared with the conventional technology,the reaction temperature of the newly developed residue selective hydrodesulfurization technology was lower by 7℃,the CCR of hydrogenated oil was higher by 11.5%,and the hydrogen consumption was lower by 7%-11%under the condition of comparable hydrodesulfurization rate.