加氢裂化催化剂FC-38的性能及应用

Performance and application of hydrocracking catalyst FC-38

以新型介孔材料Al-SBA-15与深度改性Y型分子筛复合后得到的微介孔复合分子筛作为主要酸性组分,钨镍为加氢组分,开发了单段高中油型加氢裂化催化剂FC-38,考察了其物化性质、反应性能与工业应用效果,并与FC-34的性能进行了对比。结果表明:壳层Al的引入在不影响分子筛水热稳定性的同时提供了弱酸性位;与单一Y型分子筛相比,Al-SBA-15/Y试样的比表面积和孔体积显著增加,B酸量和L酸量均减少;在相同转化率条件下,与FC-34相比,FC-38的反应温度降低2℃以上,中间馏分油选择性提高2.1个百分点,柴油十六烷值增加,尾油芳烃指数降低;在工业装置生产中,催化剂FC-38的活性稳定,加氢裂化产品质量均达到或超过技术协议的指标要求。其中:航空煤油馏分烟点均超过26 mm,可直接作为优质3#航空煤油;加氢裂化尾油可作为优质的润滑油基础油原料或催化裂化原料。

A single-stage high and middle-distillate hydrocracking catalyst FC-38 was developed with micro and mesopore composite zeolite which contained the new mesopore material Al-SBA-15 and deep modified Y zeolite as main acidity component and tungsten and nickel as hydrogenation component.The catalyst′s properties,catalytic performance and industrial application were investigated and were compared with those of FC-34.The result showed that the introduction of shell Al had provided weak acidity without affecting the hydrothermal stability of zeolite.Compared with adopting Y zeolite solely,the Al-SBA-15/Y composite zeolite possessed larger specific surface area and pore volume while containing less B and L acidic sites.Under the same conversion,the reaction temperature of FC-38 catalyst was 2℃lower than that of FC-34 catalyst.The selectivity of middle-distillate of FC-38 catalyst had increased by 2.1 percentage points,the cetane value of diesel oil was higher and the BMCI of tail oil was lower when compared with that of FC-34 catalyst.In industrial units,the activity of catalyst FC-38 was stable and the quality of all hydrocracking products had met/exceeded the requirements of technical agreement.The smoke point of aviation kerosene fraction was more than 26 mm,which could be directly used as high quality 3#aviation kerosene.The hydrocracking tail oil could be used as high quality lubricating base oil raw material or catalytic cracking raw material.