采用一套微型反应器装置 ,在 6 5 0～ 80 0℃ ,0 .1～ 0 .2 5s高温超短接触条件下进行馏分油催化裂解实验 ,研究了催化剂上焦炭沉积的规律。在实验测定结焦速率基础上 ,分析了不同温度下焦炭沉积的机理 ,并通过理论计算证明了上述推测。以上规律对于进一步定量研究结焦规律 ,确定最优的操作条件 ,均具有指导意义。 A set of microreactor was used to carry out catalytic cracking experiments on distillate oil under the conditions of ultra-short contact at 650 ~ 80 0 ℃ and 0 ~ 1 ~ 0. 25s. The coke deposition on the catalyst was studied. Based on the experimental determination of coking rate, the mechanism of coke deposition at different temperatures was analyzed, and the above speculation was proved through theoretical calculations. The above rules are of guiding significance for further quantitative study of coking laws and determination of optimal operating conditions.