Process modelling and analysis of intensified CO2 capture using monoethanolamine (MEA) in rotating packed bed absorber
Process modelling and analysis of intensified CO2 capture using monoethanolamine (MEA) in rotating packed bed absorber
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DOI：
10.1016/j.jclepro.2018.09.089
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发表时间：
2018-12
影响因子：
11.1
通讯作者：
T. Borhani;Eni Oko;Meihong Wang
中科院分区：
文献类型：
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作者：
T. Borhani;Eni Oko;Meihong Wang
采用单乙醇胺（MEA）作为溶剂捕获co2的旋转填充床（RPB）吸收器在稳态条件下根据gPROMS®中的第一原理进行建模。在此基础上考察了8种不同的动力学反应模型和5种增强因子的影响。动力学模型的选择对碳捕获水平有显著影响，但增强因子关系的影响不重要。稳态过程模型与实验数据吻合良好。12次运行的平均绝对相对偏差为3.5%。此外，还进行了工艺分析，评价了转子转速、精益MEA溶液中MEA浓度、精益MEA溶液温度和精益MEA溶液流速四个因素对CCL的影响。最后，采用正交阵列设计（OAD）方法分析了上述因素对RPB吸收体CCL和电机功率的同时影响，共考虑了25种情况。使用OAD的结果表明，转子转速对CCL的影响最大，其次是精益MEA溶液流量。此外，采用OAD方法找到了在电机功率较低的情况下导致约90% CCL的四个因素的适当组合。
Rotating packed bed (RPB) absorber using monoethanolamine (MEA) as the solvent to capture CO2is modelled at steady state condition in this study according to the first principles in gPROMS®. The effect of eight different kinetic reaction models and five enhancement factors is examined based on the newly developed model. Selection of kinetic model has a significant effect on the carbon capture level (CCL) but the effect of enhancement factor relation is not important. The steady state process model is validated against the experimental data and showed good agreement. The average absolute relative deviation for 12 case-runs is 3.5%. In addition, process analysis is performed to evaluate the effect of four factors namely rotor speed, MEA concentration in lean MEA solution, lean MEA solution temperature and lean MEA solution flow rate on CCL. Finally, the orthogonal array design (OAD) method is applied to analyse the simultaneous effect of the above-mentioned factors in the CCL and motor power of RPB absorber by considering 25 scenarios. The result of using OAD revealed that rotor speed has the most important effect on CCL, and after that lean MEA solution flow rate has the second importance. In addition, the OAD method is used to find the proper combination of four factors that resulted in about 90% CCL with low motor power.