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Coking behavior and catalyst deactivation for catalytic pyrolysis of heavy oil

机译：重油催化热解的焦化行为和催化剂失活

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摘要

For the catalytic pyrolysis of heavy oil on catalyst CEP-1, coking behavior was investigated in a confined fluidized bed reactor. Coke content on the spent catalyst decreases with the increase of H/C mol ratio of feeds and catalyst-to-oil weight ratio, while it increases with the enhancement of reaction temperature. An empirical model is proposed to predict the coke content based on feed properties and operating conditions. The predicted coke content is close to the experimental data. The relationship between micro-activity index of catalysts and coke content is studied. A coking deactivation model for pyrolyzing catalysts is established, and then model parameters are determined by the least square regression analysis. According to the deactivation model, the variations of relative activity of catalysts with both residence time of catalysts and catalyst-to-oil weight ratio are predicted.
机译：对于重油在催化剂CEP-1上的催化热解，在密闭流化床反应器中研究了焦化行为。废催化剂上的焦炭含量随着进料的H / C摩尔比和催化剂与油的重量比的增加而降低，而随着反应温度的升高而增加。提出了基于进料特性和操作条件预测焦炭含量的经验模型。预测的焦炭含量接近实验数据。研究了催化剂的微活度指数与焦炭含量之间的关系。建立了热解催化剂的焦化失活模型，然后通过最小二乘回归分析确定模型参数。根据失活模型，预测了催化剂相对活性随催化剂停留时间和催化剂与油重量比的变化。

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