border:0px, font-size:14px, font-family:-apple-system, BlinkMacSystemFont, ", vertical-align:baseline, margin:0.859em 0px, color:#060607, background-color:#FFFFFF, "> 柴油加氢裂化装置, 全体相金属催化剂, 催化剂级配, 体积空速, 重石脑油收率, 柴油收率, 原料性质, 催化剂失活速率

In order to improve the quality of diesel products and reduce the diesel yield, a 3.5 Mt/a diesel hydrotreating unit was transformed into a 3.0 Mt/a diesel hydrocracking unit. The all-phase metal catalyst Nebula 20 was adopted to achieve the production of Guo VI diesel and partially increase the production of heavy naphtha under the condition of high volumetric space velocity in a single reactor. Under the conditions of hydrotreating volumetric space velocity of 2.08 h⁻¹ and hydrocracking volumetric space velocity of 4.39 h⁻¹, the diesel yield was 81%, achieving the goal of reducing the diesel yield. Under the conditions of controlling the proportion of secondary oil processing in the feedstock to not exceed 20%, the 95% point temperature of the feedstock to not exceed 363℃, and the nitrogen content of the feedstock to not exceed 397 μg/g, the deactivation rate of the hydrotreating catalyst was 0.42℃/month, and the deactivation rate of the hydrocracking catalyst was 0.33℃/month, with the catalyst running continuously for 62 months. It indicates that the high-activity catalyst grading technology can achieve the upgrading of diesel quality and extend the service life of the catalyst.

border:0px, font-size:14px, font-family:-apple-system, BlinkMacSystemFont, ", vertical-align:baseline, margin:0.859em 0px, color:#060607, background-color:#FFFFFF, "> diesel hydrocracking unit, all-phase metal catalyst, catalyst grading, volumetric space velocity, heavy naphtha yield, diesel yield, feedstock properties, catalyst deactivation rate