Modelling and Simulation of a Fluidized Bed Reactor for Minimum Ammonium Nitrate and Reduction of NOx Emissions

A. Jarullah
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引用次数: 6

Abstract

Due to the environmental legislations related to the nitrates and their emissions, thermal decomposition of ammonium nitrate (AN) in a fluidized reactor (FR) is regarded one of the most reasonable chemical-free disposal process for an aqueous waste nitrate stream. Therefore, the present study is aimed to improve a mathematical model based on experiments (from the literature) for enhancing the design of such reactor in an environmentally friendly manner. Where, the optimal kinetic parameters of the relevant reactions are firstly obtained employing the optimization technique keeping in mind the goal to construct the model with high exactness. Such design factors are then utilized for the purpose of getting the optimal operating conditions of fluidized bed reactor (FBR) achieving the main target of this process with ammonium nitrate-free content (Nil) at the end of the reactor in addition to reducing the NOx emissions. The model is based on the two-phase theory of a FBR with predicting the concentration behavior along the reaction zone length for all components in the emulsion and bubble phases in addition to the temperature profile of the gas phase. New results related to output conversion of ammonium nitrate as well as NO content at the optimal operating conditions has been obtained in comparison with those reported in the literature.Chemical Engineering Research Bulletin 20(2018) 8-18
最小化硝酸铵和减少氮氧化物排放的流化床反应器建模与仿真
由于有关硝酸盐及其排放的环境法规,在流化反应器(FR)中热分解硝酸铵(AN)被认为是处理硝酸废水最合理的无化学处理方法之一。因此,本研究旨在改进基于实验(来自文献)的数学模型,以提高该反应器的环保设计。其中,以构建高精度模型为目标,首先采用优化技术得到相关反应的最优动力学参数。然后利用这些设计因素来获得流化床反应器(FBR)的最佳操作条件,以实现反应器末端无硝铵含量(Nil)以及减少NOx排放的主要目标。该模型基于快堆的两相理论,除预测气相温度分布外,还预测了乳液相和气泡相中所有组分沿反应区长度的浓度行为。与文献报道的结果进行了比较,得到了最佳操作条件下硝酸铵产量转化率和NO含量的新结果。化工研究通报20(2018)8-18
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