Abstract: The coking performance for the catalytic pyrolysis of heavy oil with temperature，weight ratios of catalyst －to－oil and steam－to－oil and residence time，was investigated in a confined fluidized bed reactor on catalyst CEP－1，with a special catalyst of catalytic pyrolysis process （CPP） technology．The coke content on catalyst decreases with the increase of the weight ratios of catalyst － to－oil and steam－to－oil and n（H）／n（C） of the feed，and it increases with the enhancement of reaction temperature and aromaticity of the feed．Coke yield increases with increasing reaction temperature，catalyst－to－oil weight ratio and aromaticity，while decreases with increasing steam－to－oil weight ratio and n（H）／n（C） of the feed．Both coke content and coke yield show minimum as residence time of oil gas prolongs．Both n（H）／n（C） and aromaticity of the feed can well reveal the coking tendency of a feed．On the basis of the experimental research，a correlation model of coke content and coke yield with feed property and reaction conditions was established．The parameters in the model were calculated by least square regression.

Key words: Catalytic pyrolysis , Catalyst , Coking , Heavy oil , Coke content , Correlation model

摘要： 针对重油在 CPP工艺催化剂 CEP-1上的催化裂解过程，利用小型固定流化床实验装置研究了反应温度、剂油质量比、水油质量比、油气停留时间和原料性质对焦炭收率和积炭率的影响。发现积炭率随剂油质量比、水油质量比及原料 n( H) / n(C)的增加而减小，而随反应温度以及原料芳碳率的增加而增大；焦炭收率随反应温度、剂油质量比以及原料芳碳率的增加而增大，随水油质量比及原料 n( H)/ n(C)的增加而减小；积炭率和焦炭收率均随油气停留时间的延长存在最低值。原料的 n(H)/ n(C)和芳碳率均能够较好地反映出原料的结焦性能。在实验基础上，建立了积炭率和焦炭收率与原料性质和操作条件的经验关联模型，利用最小二乘回归求得了模型参数。

关键词: 催化裂解 , 催化剂 , 结焦 , 重油 , 积炭率 , 关联模型