Modelling, simulation and analysis of intensified regenerator for solvent based carbon capture using rotating packed bed technology
Modelling, simulation and analysis of intensified regenerator for solvent based carbon capture using rotating packed bed technology
复制标题
DOI：
10.1016/j.apenergy.2017.05.157
复制
发表时间：
2017-10
期刊：
影响因子：
11.2
通讯作者：
A. Joel;Meihong Wang;C. Ramshaw;Eni Oko
中科院分区：
文献类型：
--
作者：
A. Joel;Meihong Wang;C. Ramshaw;Eni Oko
本文对燃烧后CO2捕集-化学吸收工艺中富MEA溶剂再生的旋转填充床强化再生/汽提装置进行了建模和模拟研究。这是第一次通过建模对RPB再生器进行系统研究，因为在公开文献中没有这样的出版物。将适用于RPB再生器的液、气传质系数、传热系数、持液率、界面面积和压降关联式编写成子程序，并与白杨Plus®速率模型动态连接，以取代白杨Plus®中默认的传质和传热关联式。该模型现在代表强化再生器/汽提器。模型验证表明，模型预测和文献中的实验数据之间有很好的协议。进行了过程分析，以研究转子转速对再生效率和再生能量（包括电机功率）的影响。转子转速在200 - 1200 rpm之间变化，选择该转速以涵盖转子转速的验证范围。考察了再沸器温度对CO2汽提速率的影响。研究了浓MEA流量对再生能量和再生效率的影响。所有的工艺分析都是针对宽范围的MEA浓度（32.6重量%、50重量%和60重量%）进行的。对填料塔再生器和旋转床强化再生器进行了对比研究，结果表明，再生器的尺寸减小了9.691倍。研究表明，旋转床生物质再生技术在热再生领域具有很大的应用潜力。
Intensified regenerator/stripper using rotating packed bed (RPB) for regeneration of rich-MEA solvent in post-combustion CO2capture with chemical absorption process was studied through modelling and simulation in this paper. This is the first systematic study of RPB regenerator through modelling as there is no such publication in the open literature. Correlations for liquid and gas mass transfer coefficients, heat transfer coefficient, liquid hold-up, interfacial area and pressure drop which are suitable for RPB regenerator were written in visual FORTRAN as subroutines and then dynamically linked with Aspen Plus®rate-based model to replace the default mass and heat transfer correlations in the Aspen Plus®. The model now represents intensified regenerator/stripper. Model validation shows good agreement between model predictions and experimental data from literature. Process analyses were performed to investigate the effect of rotor speed on the regeneration efficiency and regeneration energy (including motor power). The rotor speed was varied from 200 to 1200 rpm, which was selected to cover the validation range of rotor speed. Impact of reboiler temperature on the rate of CO2stripping was also investigated. Effect of rich-MEA flow rate on regeneration energy and regeneration efficiency was studied. All the process analyses were done for wide range of MEA concentration (32.6 wt%, 50 wt% and 60 wt%). Comparative study between regenerator using packed column and intensified regenerator using RPB was performed and the study shows a size reduction of 9.691 times. This study indicates that RPB process has great potential in thermal regeneration application.