Simulation of CO2 absorption into aqueous DEA using a hollow fiber membrane contactor: Evaluation of contactor performance
Simulation of CO2 absorption into aqueous DEA using a hollow fiber membrane contactor: Evaluation of contactor performance
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DOI：
10.1016/j.cej.2009.04.064
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发表时间：
2009-10
影响因子：
15.1
通讯作者：
J. A. Delgado;M. A. Uguina;J. L. Sotelo;V. I. Águeda;A. Sanz
中科院分区：
文献类型：
--
作者：
J. A. Delgado;M. A. Uguina;J. L. Sotelo;V. I. Águeda;A. Sanz
模拟了使用中空纤维接触器将二氧化碳从二氧化碳/氮气混合物吸收到二乙醇胺水溶液（作为典型胺溶液的实例）中，以获得几个操作变量（液体速度、纤维长度、贫二氧化碳负载和胺浓度）对生产率和胺溶液与二氧化碳比率的影响。所采用的模型是基于文献中常用的这种方法，但它是显着改善，因为一些简化通常认为（不可逆反应，低二氧化碳负荷，恒定的分配系数的分子二氧化碳之间的液相和气相，没有碳酸氢根和碳酸根阴离子）已被删除。这些简化对模拟结果的影响是相当重要的。提出了一个简单的性能参数研究，以评估接触器的性能，保持原料气浓度和二氧化碳去除率恒定。该过程导致液体速度和贫二氧化碳负载的最佳值，而性能参数随着胺浓度而改善。
The absorption of carbon dioxide from a carbon dioxide/nitrogen mixture into an aqueous diethanolamine solution (as an example of a typical amine solution) using a hollow fiber contactor is simulated to obtain the effect of several operational variables (liquid velocity, fiber length, lean carbon dioxide loading, and amine concentration) on productivity and amine solution to carbon dioxide ratio. The model employed is based on the ones commonly used in the literature for this process, but it was significantly improved as some simplifications usually considered (irreversible reaction, low carbon dioxide loading, constant partition coefficient of molecular carbon dioxide between liquid and gas phases, absence of bicarbonate and carbonate anions) have been removed. The effect of these simplifications on the simulated results is quite important. A simple performance parameter study is proposed to evaluate the contactor's performance, keeping the feed gas concentration and the fraction of carbon dioxide removal constant. This procedure leads to optimum values of the liquid velocity and lean carbon dioxide loading, while the performance parameter improves with amine concentration.