催化裂化提升管反应器流动反应耦合模型研究进展

催化裂化(FCC)工艺在重质油轻质化过程中发挥着重要作用, 而FCC提升管反应器的模型化是催化裂化新工艺与新装备的开发、催化裂化装置稳定操作与生产调优等常需做的工作。本文首先根据流动模型与反应模型不同的集成方式对提升管反应器流动-反应耦合模型进行了归纳与分类, 并回顾了国内外流动-反应耦合模型的研究历程, 指出了耦合模型的发展趋势;随后对当前研究较多的计算流体力学(CFD)流动-反应耦合模型进行了较为全面的阐述, 包括对耦合模型的应用场合、模型求解解耦方法的研究情况等均作了介绍, 同时还分析了该类耦合模型所存在的不足之处, 并指出工业提升管反应器在线采样技术的开发在耦合模型的验证工作上的必要性;最后, 对FCC提升管反应器流动-反应耦合模型研究进行了总结与展望, 以期能够为FCC提升管反应器模型化新方法的提出以及耦合模型的验证工作等研究给予借鉴和指导。

Evolvement of flow-reaction models for fluid catalytic cracking riser reactors

Fluid catalytic cracking(FCC) is an important process in converting heavy oil into light distillates. The modelling of FCC riser reactors is essential in the development of novel FCC processes and new equipment, as well as the steady operation and optimization of FCC units. This paper reviewed the coupled flow-reaction models for FCC risers between flow models and reaction models. The evolvements of the coupled flow-reaction models were also reviewed. The applications of the coupled CFD flow-reaction models were presented and the decoupling methods in solving the coupled models were addressed. Meanwhile, the disadvantages of the coupled CFD flow-reaction models were analyzed and the requirement of online sampling technologies for industrial FCC riser reactors was pointed out. Finally, the studies on the coupled flow-reaction models were summarized. This review would provide reference for investigations in novel modeling approaches for FCC riser reactors and for validations of the coupled models.