工业催化裂化汽油改质反应器的性能和行为

Performance of the Commercial Subsidiary Reactor for FCC Naphtha Upgrading

在工业重油催化裂化装置的辅助反应器上进行现场取样研究,详细考察了辅助反应器中催化裂化汽油改质的反应过程,分析了辅助反应器的性能和行为。结果表明,当烯烃含量要求不高时,最佳的反应条件为低反应温度、高进料负荷和没有床层藏量;当烯烃含量要求较高时,最佳的反应条件为低反应温度、高进料负荷和有床层藏量,其损失最小。催化裂化汽油改质过程中催化反应占主要地位,烯烃转化的损失主要是热裂化造成的,反应条件对烯烃转化的损失和热裂化的影响一致,其强弱顺序为:反应温度>床层藏量>进料负荷。增加床层催化剂藏量后,反应时间增加,氢转移系数HTC迅速增加。丙烯产率和HTC的变化规律相反,生成丙烯的最佳反应条件是高反应温度短反应时间。

In-situ sampling researches on the commercialsubsidiary reactor for fluidized catalytic cracking （FCC） naphtha olefin upgrading in a petrochemical company were carried out, which aimed to get better understanding of the performance of the subsidiary reactor and the FCC naphtha upgrading progresses within it. The sampling results showed that in order to get the minimum loss the optimal operation conditions were low reaction temperature, full feed load and no bed catalyst inventory when the olefin content requirement was not strict, or the low reaction temperature, full feed load and bed catalyst inventory were the choice. The catalytic cracking took the dominant position and the thermal cracking was the main cause for the loss of upgrading process. The effects of upgrading condition and the thermal cracking on the loss were consistent. The effect of reaction temperature was the greatest and that of feed load was the least. Hydrogen transfer coefficient increased greatly in condition with the bed catalyst inventory. The trend of the propylene yield and HTC was contrary. The optimal reaction condition for propylene yield was high reaction temperature and short reaction time.