柴油超深度加氢脱硫催化剂失活模型的建立

柴油超深度加氢脱硫催化剂的失活存在初期快速失活阶段和中期缓慢失活阶段，催化剂失活主要是由于积炭覆盖活性中心引起的。针对催化剂中期失活规律，将原料油性质与失活速率常数相关联，建立柴油超深度加氢脱硫催化剂失活模型，并对其进行验证。结果表明，所建立的失活模型可以较为准确地预测催化剂的失活速率，预测值与实测值的平均相对误差在5％以内。

DEACTIVATION MODEL OF HYDROTREATING CATALYST FOR ULTRA LOW SULFUR DIESEL FUEL PRODUCTION

The deactivation tests of hydrotreating catalyst for ultra low sulfur diesel fuel (ULSD) production were carried out in order to set up a catalyst deactivation model. Test results showed that the catalyst deactivation experienced an initial rapid deactivation stage and followed by a mild continued deactivation stage, which passed a long period of time and the catalyst activity reduced slowly. The continued deactivation was caused by losing active sites due to coke deposition. Based on the correlation between catalyst deactivation rate constant and feedstock properties a ULSD hydrotreating catalyst deactivation model was established. The reliability of the model was validated by experiments and the average relative error between predicted value and test data was less than 5%, indicating that the model was feasible.