减压渣油催化裂化的反应特性

利用小型固定流化床反应装置，对渣油催化裂化的反应特征进行了多方面的考察。实验结果表明，催化原料中随渣油掺入量的增加和反应时间的延长，反应过程中热裂化成分增大，氢转移反应和异构化反应减少，产品的安定性下降。因此，渣油催化裂化宜采用短接触时间和快速油气分离技术。渣油和减压馏分油在混炼过程中，原料之间无明显的交互作用，各自保持原有的生焦能力，这为炼油厂掺炼渣油时预测焦炭产率带来了方便。

REACTION BEHAVIOR OF VACUUM RESIDUA CATALYTIC CRACKING

The reaction behavior of residua catalytic cracking was investigated in a fixed fliud bed reactor by using CRC 1 catalyst. Experimental results showed that the thermal cracking reaction increased,while the hydrogen transfer and the isomerization reaction decreased with increase of the vacuum residua concentration in feedstocks and the time lasting of the reaction in the process of catalytic cracking. The stability of products would be drawdown. So the techniques of short contact time and quick speed oil gas separation in residua catalytic cracking should be taken. There was no obvious interaction in the process of catalytic cracking between vacuum gas oil(VGO)and residuum. They kept their individual contribution of coke formation as if they were cracked per se.