Validation of a process model of CO2 capture in an aqueous solvent, using an implicit molecular based treatment of the reactions
Validation of a process model of CO2 capture in an aqueous solvent, using an implicit molecular based treatment of the reactions
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DOI：
10.1016/j.egypro.2013.06.032
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
C. Brand;J. Rodríguez;A. Galindo;G. Jackson;C. Adjiman
中科院分区：
文献类型：
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作者：
C. Brand;J. Rodríguez;A. Galindo;G. Jackson;C. Adjiman
提出了一种用于从化石燃料发电厂的烟道气中分离二氧化碳（CO2）后回收含水单乙醇胺（MEA）溶剂的解吸器模型。该模型是从以前开发的吸收体模型，通过使用相同的基于速率的阶段和物理性质模型。这个建模框架的新奇在于集成到一个基于速率的过程模型的国家的最先进的SAFT-VR热力学模型，其中的物理和化学相互作用被同时处理，假设化学反应处于平衡状态。这种方法减少了模拟溶剂与CO2相互作用所需的实验数据量。在这种形式主义中，化学反应的隐式处理避免了加入增强因子或使用实验数据来确定反应速率的需要。采用gPROMS软件实现解吸塔模型，并使用中试装置数据进行验证，无需调整任何模型参数。在很宽的操作条件范围内获得非常好的预测。
A model of a desorber for the recovery of aqueous monoethanolamine (MEA) solvent following the separation of carbon dioxide (CO2) from flue gas from a fossil fuel power plant is presented. This model is derived from a previously developed absorber model, by using the same rate-based stage and physical property models. The novelty of this modeling framework lies in the integration into a rate-based process model of the state-of-the-art SAFT-VR thermodynamic model, in which the physical and chemical interactions are treated simultaneously, assuming that the chemical reactions are at equilibrium. Such an approach reduces the amount of experimental data needed to model the interactions of the solvent with CO2. The implicit treatment of the chemical reactions in this formalism obviates the need to incorporate an enhancement factor or to use experimental data for the rate of reaction. The gPROMS software is employed to implement the desorber model and pilot plant data are used for the validation, without adjusting any model parameters. Very good predictions are obtained over a wide range of operating conditions.