汽柴油加氢装置催化剂性能考察及长周期运行操作优化

为了适应柴油产品质量升级需求，中国石化塔河炼化公司2号汽柴油加氢装置采用中国石化石油化工科学研究院开发的RS2100/RS2110超深度加氢脱硫催化剂新鲜剂和中国石化大连（抚顺）石油化工研究院开发的FHUDS系列催化剂再生剂，处理焦化汽油、焦化柴油和常二线柴油的混合原料，得到的精制柴油硫质量分数为3.2 μg/g，氮质量分数为0.67 μg/g，多环芳烃质量分数为2.9%，十六烷值为52，闪点（闭口）为68 ℃，满足国Ⅵ柴油质量升级的要求。装置运行不到一年，催化剂失活速率大于24.0 ℃/a，而后通过调整两台反应器的温度分布、原料组成和产品硫含量，使催化剂失活速率小于14.4 ℃/a，反应器床层最高温度不大于390 ℃，反应器压差维持在0.4 MPa，催化剂稳定性较好，能够满足装置长周期运行的要求。

OPTIMIZATION AND LONG TERM OPERATION OF GASOLINE AND DIESEL HYDROTREATING UNIT

The fresh ultra-deep hydrodesulfurization catalysts RS2100/RS2110 (developped by SINOPEC Research Institute of Petroleum Processing) and regenerated FHUDS catalyst series (developped by SINOPEC Dalian(Fushun) Research Institute of Petroleum Processing) were used in a 1.67 Mt/a hydrotreating unit processing mixed feedstock of coker gasoline, coker diesel and atmospheric gas oil in SINOPEC Tahe Refinery & Chemical Company. The national VI standard diesel was obtained with flash point (closed) of 68℃，S content of 3.2 μg/g，nitrogen content of 0.67 μg/g， cetane number of 52，and poly-aromatic hydrocarbons content of 2.9 %. However, the deactivation rate of catalysts was to 24.0 ℃/a within half a year. After adjusting the temperature distribution of two reactors，raw material composition as well as the sulfur content of products， the catalyst deactivation rate was reduced to less than 14.4 ℃/a，the pressure drop of reactors was 0.4 MPa, and the maximum temperature of reactor bed was less than 390 ℃, indicating a good stability of the catalysts system. The catalysts can meet the need for long term operation.