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Dynamic modeling and simulations of the behavior of a fixed-bed reactor-exchanger used for CO2 methanation
AIChE Journal ( IF 3.7 ) Pub Date : 2017-09-05 11:10:46 , DOI: 10.1002/aic.15874
Rasmey Try 1, 2 , Alain Bengaouer 1 , Pierre Baurens 1 , Christian Jallut 2
Affiliation  

A multidimensional heterogeneous and dynamic model of a fixed-bed heat exchanger reactor used for CO2 methanation has been developed in this work that is based on mass, energy and momentum balances in the gas phase and mass and energy balances for the catalyst phase. The dynamic behavior of this reactor is simulated for transient variations in inlet gas temperature, cooling temperature, gas inlet flow rate, and outlet pressure. Simulation results showed that wrong-way behaviors can occur for any abrupt temperature changes. Conversely, temperature ramp changes enable to attenuate and even fade the wrong-way behavior. Traveling hot spots appear only when the change of an operating condition shifts the reactor from an ignited steady state to a non-ignited one. Inlet gas flow rate variations reveal overshoots and undershoots of the reactor maximum temperature. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译:

用于CO2甲烷化的固定床反应器交换器行为的动态建模和模拟

用于CO 2的固定床换热器的多维非均质动力学模型在这项工作中已开发出甲烷化反应,它基于气相的质量,能量和动量平衡以及催化剂相的质量和能量平衡。针对入口气体温度,冷却温度,气体入口流速和出口压力的瞬时变化模拟了该反应器的动态行为。仿真结果表明,任何突然的温度变化都可能发生错误的行为。相反,温度变化的变化可以减弱甚至减弱错误行为。仅当操作条件的变化将反应堆从点燃的稳态转变为未点燃的稳态时,才会出现行进热点。进气流量的变化揭示了反应器最高温度的上冲和下冲。©2017美国化学工程师学会AIChE J,2017
更新日期:2017-09-05
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