摘要
悬浮床加氢裂化反应以热裂化为主 ,同时伴有加氢反应。悬浮床加氢裂化分两个温度段 :低温加氢精制和高温裂化。两温度段与单温度段相比 ,在生焦率相当的情况下 ,转化率有显著的提高 ,且杂原子的脱除也有明显的改善。在渣油中添加模型化合物蒽进行加氢裂化反应 ,如只进行低温 (416℃ )反应 ,约有 6 0 %的蒽转化为 9,10 二氢蒽 ;再经高温 (436℃ )反应 ,约有 5 %的 9,10 二氢蒽又还原为蒽 ,这说明具有蒽结构的芳烃在低温反应时可部分氢化 ,在高温反应时部分氢化芳烃又释放出活泼氢还原为芳烃。
Two-stage suspended bed hydrocracking was suggested based on the fact that there were two kinds of reactions in the reactor: hydrogenation at low temperature and thermocracking at high temperature. Compared with single stage reaction, two-stage reaction was characterized by its lower coke formation, higher cracking and higher removal of heteroatoms. At 416°C about 60% of anthracene, the model compound, was hydrogenated. And about 5% of the hydrogenated compound, 9, 10-dihydroanthracene, released the activated hydrogen which could prevent the residue from coke formation and remove sulfur and/or nitrogen at the higher temperature of 436°C. Comparison results of the two kinds of reaction showed that reaction was superior to single stage reaction with respect to sulfur and/or nitrogen removed.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2002年第4期38-42,共5页
Acta Petrolei Sinica(Petroleum Processing Section)
